JP2009281649A - Heating system - Google Patents

Abstract

In a heating system that heats a heat medium of a heat transfer circuit provided with a use-side heat exchanger by heat released from a refrigerant of a refrigeration apparatus and exhaust heat of the power generation apparatus, effective power generated by the power generation apparatus is obtained. Use it.
A heating system that heats a heat medium of a heat transfer circuit (30) by a refrigeration apparatus (19) that performs a refrigeration cycle by circulating a refrigerant and a power generation apparatus (85) that generates electric power and exhaust heat. In 10), the supply destination of the power generated by the power generation device (85) is configured to be switchable between the power demand unit (14) operating by the power and the refrigeration device (19).
[Selection] Figure 1

Description

  The present invention relates to a heating system that heats a heat medium of a heat transfer circuit provided with a use side heat exchanger by a refrigeration apparatus that performs a refrigeration cycle.

  2. Description of the Related Art Conventionally, a heating system that heats a heat medium of a heat transfer circuit provided with a use side heat exchanger by a refrigeration apparatus that performs a refrigeration cycle is known. In this type of heating system, indoor heating is performed using heat released by the heat medium in the use side heat exchanger.

For example, Patent Document 1 discloses a floor heating apparatus that performs floor heating as this type of heating system. In this floor heating apparatus, a hot water heat exchanger of a secondary circuit (heat transfer circuit) provided with a floor heating panel is connected to a refrigerant circuit of a refrigeration apparatus. In the hot water heat exchanger, the refrigerant dissipates heat, and the water circulating in the secondary circuit is heated. In the secondary circuit, the hot water heated by the hot water heat exchanger radiates heat from the floor heating panel. Thus, in this floor heating apparatus, the indoor water is heated by the heat of the hot water heated by the refrigerant of the refrigeration apparatus dissipating heat from the floor heating panel. In this floor heating device, the inverter of the compressor of the refrigeration apparatus is controlled so that the temperature of the hot water returning from the floor heating panel to the hot water heat exchanger becomes the target temperature.
JP 2000-46417 A

  By the way, in this kind of heating system, it is conceivable to use the exhaust heat of the power generation device in addition to the refrigeration device for heating the heat medium of the heat transfer circuit. In such a case, it is conceivable that the electric power generated by the power generation device is consumed by, for example, the refrigeration device. However, when the power consumption in the refrigeration apparatus is reduced, there is a possibility that the electric power generated in the power generation apparatus will remain.

  The present invention has been made in view of this point, and an object of the present invention is to heat the heat transfer circuit provided with the use-side heat exchanger by heat released from the refrigerant of the refrigeration apparatus and exhaust heat of the power generation apparatus. In the heating system that heats the medium, the purpose is to effectively use the electric power generated by the power generation device.

  The first invention performs a refrigeration cycle by circulating a refrigerant between a heat transfer circuit (30) for circulating a heat medium between a heat source side heat exchanger (50, 51) and a use side heat exchanger (35). A refrigeration apparatus (19) connected to the heat source side heat exchanger (50, 51) and heating the heat medium of the heat transfer circuit (30) with a refrigerant in the heat source side heat exchanger (50, 51). And a heating system that uses the heat released by the heat medium in the use side heat exchanger (35) for indoor heating. The heating system generates electric power and exhaust heat, and the power generation device (85) that heats the heat medium supplied to the use side heat exchanger (35) in the heat transfer circuit (30) by the exhaust heat. ) And the supply destination of the power generated by the power generation device (85) is configured to be switchable between the power demand section (14) operated by the power and the refrigeration device (19).

  In the first invention, the heat medium circulating in the heat transfer circuit (30) is heated by the heat released from the refrigerant of the refrigeration apparatus (19) and the exhaust heat of the power generation apparatus (85). In the heat transfer circuit (30), the heated heat medium dissipates heat in the use side heat exchanger (35). On the other hand, in this 1st invention, the supply destination of the electric power which generate | occur | produced with the electric power generating apparatus (85) can be switched between an electric power demand part (14) and a freezing apparatus (19). The electric power generated by the power generation device (85) is consumed by either the power demand unit (14) or the refrigeration device (19).

  According to a second invention, in the first invention, the refrigeration apparatus (19) is driven only by the power generated by the power generation apparatus (85), and the power generated by the power generation apparatus (85) is the power demand. While being supplied to the section (14), the operation of the refrigeration apparatus (19) is stopped.

  In the second invention, the refrigeration apparatus (19) is driven only by the electric power generated by the power generation apparatus (85). The refrigeration apparatus (19) can be operated if there is fuel to be supplied to the power generation apparatus (85). For this reason, it is not necessary to connect a freezing apparatus (19) to a power supply.

  In a third aspect based on the second aspect, the heat transfer circuit (30) includes a heat storage tank (37) for storing a heat medium heated by the refrigeration apparatus (19) and the power generation apparatus (85). ), And the heat storage tank (37) is used to adjust the amount of heat of the heat medium supplied to the use side heat exchanger (35).

  In the third invention, the heat transfer circuit (30) is provided with a heat storage tank (37) for storing the heat medium heated by the refrigeration apparatus (19) and the power generation apparatus (85). The heat storage tank (37) stores the heat of the heat medium heated by the refrigeration apparatus (19) and the power generation apparatus (85). For this reason, it becomes possible to adjust the calorie | heat amount of the heat medium supplied to a utilization side heat exchanger (35) with a heat storage tank (37).

  According to a fourth aspect of the present invention, in the third aspect of the present invention, even if the heating load in the use side heat exchanger (35) is equal to or greater than a predetermined heating side reference value, the power demand or power in the power demand section (14) When the load is greater than or equal to a predetermined power-side reference value, the supply destination of power generated by the power generation device (85) is set in the power demand section (14).

  In 4th invention, even if the heating load in a use side heat exchanger (35) is more than a heating side reference value, when the electric power demand or electric power load in an electric power demand part (14) is more than an electric power side reference value The supply destination of the electric power generated by the power generation device (85) is set in the electric power demand section (14). Since no power is supplied to the refrigeration apparatus (19), the operation of the refrigeration apparatus (19) is stopped. In the fourth aspect of the invention, even if the heating load in the use side heat exchanger (35) is increased to some extent, if a certain amount of electric power is required in the power demand section (14), the operation of the refrigeration apparatus (19) is performed. The power is supplied from the power generator (85) to the power demand section (14) without performing the above.

  According to a fifth invention, in any one of the first to third inventions, a supply destination of power generated in the power generation device (85) using the power demand or power load in the power demand section (14). Is configured to be determined.

  In 5th invention, the supply destination of the electric power which generate | occur | produced with the electric power generating apparatus (85) is determined using the electric power demand or electric power load in an electric power demand part (14). That is, the power demand or power load in the power demand section (14) is used as a parameter for determining the supply destination of the power generated by the power generation device (85).

  According to a sixth invention, in the second or third invention, when the heating load in the use side heat exchanger (35) is smaller than a predetermined low load judgment value, the power generation device (85) generates The power supply destination is set in the power demand section (14).

  In 6th invention, when the heating load in a utilization side heat exchanger (35) is smaller than a low load judgment value, the supply destination of the electric power which generate | occur | produced in the electric power generating apparatus (85) is set to an electric power demand part (14). Is done. Thereby, the operation of the refrigeration apparatus (19) is stopped. In the sixth aspect of the invention, when the heating load becomes small, the operation of the refrigeration apparatus (19) becomes unnecessary, so the supply destination of the power generated by the power generation apparatus (85) is set in the power demand section (14). The

  In the present invention, since the supply destination of the power generated in the power generation device (85) can be switched between the power demand section (14) and the refrigeration device (19), the power generated in the power generation device (85) Is consumed in either the power demand section (14) or the refrigeration apparatus (19). For this reason, it can suppress that the electric power which generate | occur | produced with the electric power generating apparatus (85) is surplus compared with the case where the supply destination of the electric power generated with the electric power generating apparatus (85) is only a freezing apparatus (19). Accordingly, it is possible to effectively use the power generated by the power generation device (85).

  In the second aspect of the invention, since the refrigeration apparatus (19) is driven only by the electric power generated by the power generation apparatus (85), it is not necessary to connect the refrigeration apparatus (19) to the power source. Therefore, the refrigeration apparatus (19) can be installed where there is no power source.

  Moreover, in the said 3rd invention, since the thermal storage tank (37) for storing the heat medium heated by the freezing apparatus (19) and the electric power generating apparatus (85) is provided in the heat transfer circuit (30), it utilizes. The amount of heat of the heat medium supplied to the side heat exchanger (35) can be adjusted by the heat storage tank (37). When the amount of heat of the heat medium supplied to the use side heat exchanger (35) is adjusted, the heating capacity in the use side heat exchanger (35) is adjusted. For this reason, heating in the use side heat exchanger (35) without operating the refrigeration apparatus (19), that is, without setting the supply destination of the power generated by the power generation apparatus (85) to the refrigeration apparatus (19). Ability can be increased. Therefore, even when the heating load is relatively large, the power supply unit (14) can be set as the supply destination of the power generated by the power generation device (85). It becomes possible to supply a large amount of power to (14).

  In the fourth aspect of the invention, even if the heating load in the use side heat exchanger (35) is increased to some extent, if the power demand section (14) requires a certain amount of power, the refrigeration apparatus (19) Electric power is supplied from the power generation device (85) to the power demand section (14) without performing the above operation. Here, if there is no heat storage tank (37) in the heat transfer circuit (30), when the heating load in the use side heat exchanger (35) becomes high, if the refrigeration unit (19) is not operated, the use side The heating capacity in the heat exchanger (35) cannot be increased. On the other hand, in this 4th invention, since the heating capability in a utilization side heat exchanger (35) can be adjusted with a heat storage tank (37), even when a heating load becomes high, a heat storage tank (37 ) And the exhaust heat of the power generation device (85) can cover the heating load. For this reason, even if the heating load in the user-side heat exchanger (35) is increased to some extent, if a certain amount of power is required in the power demand section (14), the power generated in the power generator (85) is It becomes possible to supply to the demand department (14). Therefore, the timing at which the power supply destination from the power generation device (85) is switched from the refrigeration device (19) to the power demand section (14) is less affected by fluctuations in the heating load.

  In the sixth aspect of the invention, when the heating load is reduced, the operation of the refrigeration apparatus (19) is not necessary, so the supply destination of the power generated by the power generation apparatus (85) is the power demand section (14). Is set. A reduction in the heating load is detected using a low load determination value. Therefore, when the heating load is reduced, the supply destination of the power generated by the power generation device (85) can be appropriately switched to the power demand section (14).

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Embodiment 1 of the Invention
A first embodiment of the present invention will be described. The first embodiment is a heating system (10) according to the present invention. The heating system (10) is configured to heat the room with heat released by the heat medium in the use side heat exchanger (35) provided in the heat transfer circuit (30). The heating system (10) is provided with a refrigeration apparatus (19) and a power generation apparatus (85) as heat sources for the heat medium of the heat transfer circuit (30). This heating system (10) is installed in a general household in a cold region, for example. In the heating system (10), all the devices such as the heat transfer circuit (30) and the refrigeration apparatus (19) are driven only by the electric power generated by the power generation apparatus (85).

<Heat transfer circuit>
As shown in FIG. 1, the heating system (10) includes a heat transfer circuit (30) filled with a heat medium (for example, water). The heat transfer circuit (30) includes a first heat source side heat exchanger (50), a second heat source side heat exchanger (51), and a plurality of usage side heat exchangers (35). The plurality of usage side heat exchangers (35) are connected in parallel to each other between the supply side header (33) and the return side header (34). In the heat transfer circuit (30), the heat medium circulates between the first heat source side heat exchanger (50) and the second heat source side heat exchanger (51), and each use side heat exchanger (35).

  In the heat transfer circuit (30), a passage extending from the outflow side of the first heat source side heat exchanger (50) to the inflow side of each use side heat exchanger (35) constitutes a supply passage (31). A second heat source side heat exchanger (51) is disposed in the supply passage (31). That is, the second heat source side heat exchanger (51) is arranged downstream of the first heat source side heat exchanger (50). In the supply passage (31), an openable first open / close valve (41) is provided between the second heat source side heat exchanger (51) and the supply side header (33). The first on-off valve (41) is driven only by the electric power generated by the power generator (85). This also applies to the other on-off valves (42 to 45) described later.

  In the heat transfer circuit (30), a passage extending from the outflow side of each use side heat exchanger (35) to the inflow side of the first heat source side heat exchanger (50) forms a return passage (32). . In the return passage (32), a pump (36) having a variable discharge flow rate is provided between the return header (34) and the first heat source side heat exchanger (50). The pump (36) is driven only by the electric power generated by the power generator (85). An expansion tank (38) for releasing the pressure of the heat transfer circuit (30) is connected to the suction side of the pump (36) in the return passage (32). Further, an outlet temperature sensor (17) for measuring the temperature of the heat medium radiated by each use side heat exchanger (35) is provided between the return side header (34) and the pump (36) in the return passage (32). ) Is provided.

  Both the first heat source side heat exchanger (50) and the second heat source side heat exchanger (51) include a first flow path (50a, 51a) and a second flow path (50b, 51b), and the first flow The fluid flowing through the channel (50a, 51a) and the fluid flowing through the second channel (50b, 51b) are configured to exchange heat. Both the first heat source side heat exchanger (50) and the second heat source side heat exchanger (51) are constituted by, for example, plate heat exchangers. In both the first heat source side heat exchanger (50) and the second heat source side heat exchanger (51), the first flow path (50a, 51a) is connected to the heat transfer circuit (30). Moreover, each use side heat exchanger (35) is comprised as a radiator for floor heating installed in the back side of a floor surface material, or a radiator installed in indoor space.

  Further, the heat transfer circuit (30) of the first embodiment has a heat storage tank for storing the heat medium heated by the first heat source side heat exchanger (50) and the second heat source side heat exchanger (51). (37) is provided. The heat storage tank (37) is filled with the heat medium, and the temperature of the heat medium is higher toward the upper side. At the top of the heat storage tank (37), an inflow passage (61) for allowing a warm heat medium to flow into the heat storage tank (37) and an outflow passage (64) for allowing the warm heat medium to flow out from the heat storage tank (37) And are connected. The inflow passage (61) branches off from between the second heat source side heat exchanger (51) and the first on-off valve (41) in the supply passage (31). The inflow passage (61) is provided with a second on-off valve (42) that can be freely opened and closed. On the other hand, the outflow passage (64) joins between the first on-off valve (41) and the supply-side header (33) in the supply passage (31). The outflow passage (64) is provided with a fifth open / close valve (45) that can be freely opened and closed.

  A junction passage (63) is connected to the bottom surface of the heat storage tank (37). The confluence passage (63) is branched to the first communication passage (62a) and the second communication passage (62b) on the side opposite to the heat storage tank (37). The first communication passage (62a) is connected to the suction side of the pump (36) in the return passage (32). A fourth open / close valve (44) that can be freely opened and closed is provided in the first communication passage (62a). On the other hand, the second communication passage (62b) is connected to the discharge side of the pump (36) in the return passage (32). A third open / close valve (43) that can be freely opened and closed is provided in the second communication passage (62b).

  In the first embodiment, by controlling the first to fifth on-off valves (41 to 45), only the heat medium heated by the heat source side heat exchanger (50, 51) is used for each use side heat exchanger (35 ), Normal heat supply operation to the heat source side heat exchanger (50, 51), heat storage operation to supply the heat medium heated to each use side heat exchanger (35) and the heat storage tank (37), and heat source Select from three types of operation, one for supplying both the heat medium heated by the side heat exchanger (50, 51) and the warm heat medium in the heat storage tank (37) to each user-side heat exchanger (35) Can be done automatically. Furthermore, in each operation | movement of normal operation | movement, heat storage operation | movement, and utilization operation | movement, among the high capacity | capacitance state which uses both refrigeration equipment (19) and electric power generation equipment (85) as a heat source, refrigeration equipment (19) It is possible to switch to a low capacity state where only the power generation device (85) is used as a heat source. The power generation device (85) continuously heats the heat medium in the heat transfer circuit (30) while the heat medium is circulated in the heat transfer circuit (30).

  In the following, the use operation in the high ability state is the first action, the normal action in the high ability state is the second action, the heat storage action in the high ability state is the third action, the use action in the low ability state is the fourth action, and the low ability state The normal operation is referred to as the fifth operation, and the heat storage operation in the low capacity state is referred to as the sixth operation. In this embodiment, the total heat quantity of the heat medium supplied to the plurality of usage-side heat exchangers (35) increases in the order of the first to sixth operations.

<Refrigeration equipment>
The refrigeration apparatus (19) includes a refrigerant circuit (21) that performs a refrigeration cycle. The refrigerant circuit (21) is filled with, for example, a fluorocarbon refrigerant. A compressor (22), a first heat source side heat exchanger (50), a pressure reducing mechanism (24), and an outdoor heat exchanger (25) are connected in order to the refrigerant circuit (21). In the first heat source side heat exchanger (50), the second flow path (50b) is connected to the refrigerant circuit (21). In the refrigeration cycle in the refrigerant circuit (21), the first heat source side heat exchanger (50) serves as a condenser, and the outdoor heat exchanger (25) serves as an evaporator.

  The compressor (22) is configured as a compressor having a fixed operating capacity. The compressor (22) is one in which the electric motor is always operated at a constant rotational speed, and its operating capacity is fixed. Of course, it is possible to employ a compressor having a variable operating capacity as the compressor (22). The decompression mechanism (24) is configured as an electronic expansion valve with a variable opening. The outdoor heat exchanger (25) is configured as a cross fin type fin-and-tube heat exchanger. An outdoor fan (26) for sending air to the outdoor heat exchanger (25) is provided in the vicinity of the outdoor heat exchanger (25).

  In the present embodiment, the refrigeration apparatus (19) is driven only by the electric power generated by the power generation apparatus (85). That is, the compressor (22), the pressure reducing mechanism (24), and the outdoor fan (26) are all driven only by the electric power generated by the power generation device (85).

  Note that the refrigeration apparatus (19) may be configured to perform a supercritical refrigeration cycle in which the high pressure of the refrigeration cycle is set to a value higher than the critical pressure of the refrigerant. In this case, in a normal refrigeration cycle in which the high pressure of the refrigeration cycle is set to a value lower than the critical pressure of the refrigerant, a heat exchanger serving as a condenser operates as a radiator (gas cooler). For example, carbon dioxide is used as the refrigerant.

<Power generation equipment>
The power generation device (85) includes a power generation unit (81) configured to generate electric power and exhaust heat when supplied with fuel, and a cooling circuit (82) for cooling the power generation unit (81). ing. The power generation device (85) has a fixed output power. That is, the output power of the power generator (85) is not adjustable.

  The power generation unit (81) is constituted by, for example, a unit provided with a heat engine such as a gas turbine or a gas engine, or a unit provided with a fuel cell. The power generation unit (81) including the heat engine is configured such that the heat engine is supplied with air and fuel, and converts the combustion energy of the fuel into motive power for driving. In the power generation section (81), the generated electric power is output and exhaust heat such as combustion exhaust gas of the heat engine is output as warm heat. Further, the power generation unit (81) provided with the fuel cell generates power by the fuel cell and outputs electric power from the fuel cell. In the power generation unit (81), exhaust heat of at least one of the reforming unit that generates hydrogen to be supplied to the fuel cell by reforming the fuel and the fuel cell is output as warm heat. The power generation unit (81) provided with the fuel cell is one that is directly supplied with hydrogen fuel without having a reforming unit, or one that uses liquid hydrocarbons (eg, methanol, ethanol) as the fuel. Also good.

  The cooling circuit (82) is configured to circulate a heat medium (for example, water). The cooling circuit (82) is provided with a cooling pump for circulating the heat medium (not shown). The cooling pump is driven by the electric power generated in the power generation unit (81). The cooling circuit (82) is connected to the second flow path (51b) of the second heat source side heat exchanger (51). In the cooling circuit (82), the heat medium passing through the power generation unit (81) cools the power generation unit (81). Then, when the power generation unit (81) is cooled, the heat medium heated by the exhaust heat of the power generation unit (81) heats the heat medium of the heat transfer circuit (30) by the second heat source side heat exchanger (51). To do.

  In the first embodiment, as described above, the second heat source side heat exchanger (51) is disposed downstream of the first heat source side heat exchanger (50). In this arrangement, the temperature of the heat medium at the outlet of the power generation unit (81) in the cooling circuit (82) is compared with the temperature of the heat medium at the outlet of the first heat source side heat exchanger (50) in the heat transfer circuit (30). It is adopted when it is assumed that it will be somewhat high.

  In the first embodiment, the power generator (85) is connected to the outlet (16) to which the commercial power is supplied and the refrigeration apparatus (19). A first switch (12) is provided on the wiring between the power generation device (85) and the refrigeration device (19). A second switch (13) is provided in the wiring between the power generation device (85) and the outlet (16). In this embodiment, one of the first switch (12) and the second switch (13) is set on, and the other is set off. In other words, the supply destination of the power generated by the power generation device (85) can be switched between the power demand section (14) connected to the outlet (16) and operated by power, and the refrigeration device (19). Yes. The power demand section (14) is, for example, lighting or electrical appliances installed at home.

<Configuration of controller>
The heating system (10) of Embodiment 1 is provided with a controller (55) that controls the operating state of the heating system (10). The controller (55) constitutes a control means.

  The controller (55) selects an operation to be executed from the six operations of the first to sixth operations based on the measured value (To) of the outlet temperature sensor (17) and the power demand at the outlet (16), The heat transfer circuit (30) is configured to execute the selected operation.

  Note that the power demand at the outlet (16) is estimated by the controller (55). The controller (55) estimates the daily power demand by, for example, learning control using the measured value of a wattmeter (not shown) that measures the power used at the outlet (16) (see FIG. 2). However, the controller (55) may be configured to use the power load at the outlet (16) instead of using the power demand at the outlet (16) to select the operation to be performed. The power load at the outlet (16) is detected from, for example, a measured value of a power meter.

  The controller (55) receives the measured value (To) of the outlet temperature sensor (17) and the indoor set temperature (Ts). The controller (55) is preset with first to fourth determination values (T1, T2, T3, T4) for selecting the operation of the heat transfer circuit (30).

  The controller (55) selects the first operation when the following expression 1 is satisfied. The first operation is selected when the measured value (To) of the outlet temperature sensor (17) is small, that is, when the heating load at which the temperature of the heat medium is greatly decreased in each use-side heat exchanger (35) is high. . When the following equation 1 is established, the controller (55) determines that the total heating load (hereinafter referred to as “total heating load”) in the plurality of usage-side heat exchangers (35) depends on the refrigeration apparatus (19). Heating capacity of the heat transfer circuit (30) (hereinafter referred to as “refrigeration side heating capacity”; for example, 3 kW) and heating capacity of the heat transfer circuit (30) by the power generation device (85) (hereinafter referred to as “power generation side heating capacity”) For example, it is determined that the value is somewhat higher than the sum of 2 kW). When the controller (55) selects the first action, the controller opens the first on-off valve (41), the third on-off valve (43), and the fifth on-off valve (45) and opens the second on-off valve (42). And by setting the 4th on-off valve (44) to the closed state, the heat transfer circuit (30) executes the use operation, and by setting the operating state of the refrigeration apparatus (19) to the on state, the high capacity state is set. To do. In addition, a controller (55) sets a 1st switch (12) to ON and sets a 2nd switch (13) to OFF, when setting the driving | running state of a freezing apparatus (19) to an ON state. Thereby, the electric power generated by the power generation device (85) is supplied to the refrigeration device (19).

Formula 1: To-Ts <T1 (where T1 <0).
Further, the controller (55) determines that the total heating load is approximately equal to the total of the refrigeration side heating capacity and the power generation side heating capacity when the following expression 2 is established, and selects the second operation. . When the controller (55) selects the second action, the controller opens the first on-off valve (41), opens the second on-off valve (42), the third on-off valve (43), and the fourth on-off valve (44). And by setting the fifth on-off valve (45) to the closed state, the heat transfer circuit (30) performs normal operation, and by setting the operating state of the refrigeration unit (19) to the on state, the high capacity state is set. To do.

Formula 2: T1 ≦ To−Ts ≦ T2 (where T2> 0)
Further, the controller (55) has a value that the total heating load is somewhat lower than the total of the refrigeration side heating capacity and the power generation side heating capacity and is somewhat higher than the power generation side heating capacity when the following Equation 3 is satisfied. Judgment is made and the third operation is selected. When the controller (55) selects the third action, the controller opens the first on-off valve (41), the second on-off valve (42), and the fourth on-off valve (44), and opens the third on-off valve (43). And by setting the fifth on-off valve (45) to the closed state, the heat transfer circuit (30) performs the heat storage operation, and by setting the operating state of the refrigeration system (19) to the on state, the high capacity state is set. To do.

Formula 3: T2 <To−Ts ≦ T3 (T3> T2)
Note that, according to the third determination value (T3), it is determined whether or not the total heating load is equal to or greater than a predetermined heating-side reference value. If the difference (To-Ts) between the measured value (To) of the outlet temperature sensor (17) and the indoor set temperature (Ts) is equal to or less than the third determination value (T3), the total heating load is equal to or greater than the heating-side reference value. It is judged.

  Further, the controller (55), when the power demand at the outlet (16) is equal to or greater than a predetermined power-side reference value (for example, 1.0 kW), if any of the above formulas 1 to 3 is satisfied (that is, the total The fourth operation is selected even when the heating load is equal to or higher than the heating-side reference value. When the controller (55) selects the fourth action, the controller opens the first on-off valve (41), the third on-off valve (43), and the fifth on-off valve (45), and opens the second on-off valve (42). And by setting the 4th on-off valve (44) to the closed state, the heat transfer circuit (30) executes the use operation, and by setting the operating state of the refrigeration apparatus (19) to the off state, the low capacity state is set. To do. In this embodiment, even if the total heating load is increased to some extent, if a certain amount of electric power is required in the power demand section (14), the refrigeration apparatus (19) is not operated and the power generation apparatus (85) Power is supplied to the power demand department (14). In addition, a controller (55) sets a 2nd switch (13) to ON and sets a 1st switch (12) to OFF, when setting the driving | running state of a freezing apparatus (19) to an OFF state. Thereby, the electric power generated by the power generation device (85) is supplied to the power demand section (14).

  The controller (55) determines that the total heating load is substantially the same as the power generation side heating capacity when the following expression 4 is established, and selects the fifth operation. When the controller (55) selects the fifth operation, the controller opens the first on-off valve (41), opens the second on-off valve (42), the third on-off valve (43), and the fourth on-off valve (44). And by setting the fifth on-off valve (45) to the closed state, the heat transfer circuit (30) is made to perform normal operation, and by setting the operating state of the refrigeration unit (19) to the off state, the low capacity state is set. To do.

Formula 4: T3 <To−Ts ≦ T4 (T4> T3)
Note that, according to the third determination value (T3), it is also determined whether or not the total heating load is smaller than a predetermined low load determination value. If the difference (To-Ts) between the measured value (To) of the outlet temperature sensor (17) and the indoor set temperature (Ts) is larger than the third determination value (T3), the total heating load is lower than the low load determination value. It is determined that heating of the heat transfer circuit (30) by the refrigeration apparatus (19) is not necessary.

  Further, the controller (55) determines that the total heating load is a value that is somewhat lower than the power generation side heating capacity when Equation 5 below is satisfied, and selects the sixth operation. When the controller (55) selects the sixth action, the first on-off valve (41), the second on-off valve (42), and the fourth on-off valve (44) are set to the open state, and the third on-off valve (43) And by setting the fifth on-off valve (45) to the closed state, the heat transfer circuit (30) performs the heat storage operation, and by setting the operating state of the refrigeration apparatus (19) to the off state, the low capacity state is set. To do.

Formula 5: T4 <To-Ts
-Driving action-
Operation | movement of the heating system (10) of this Embodiment 1 is demonstrated.

  First, the operation of the refrigeration apparatus (19) will be described. In the refrigerant circuit (21) of the refrigeration system (19), the refrigerant discharged from the compressor (22) circulates, whereby the heat source side heat exchanger (50, 51) operates as a radiator and the outdoor heat exchanger. A refrigeration cycle in which (25) operates as an evaporator is performed. In this refrigeration cycle, the opening degree of the decompression mechanism (24) is adjusted as appropriate.

  Specifically, the refrigerant discharged from the compressor (22) dissipates heat to the heat medium of the heat transfer circuit (30) and condenses in the first heat source side heat exchanger (50). The refrigerant condensed in the first heat source side heat exchanger (50) is decompressed by the decompression mechanism (24), absorbs heat from the air sent by the outdoor fan (26) in the outdoor heat exchanger (25), and evaporates. The refrigerant evaporated in the outdoor heat exchanger (25) returns to the compressor (22), is compressed, and is discharged again.

  Subsequently, the operation of the power generation device (85) will be described. In the power generation unit (81) of the power generation device (85), fuel is supplied and electric power and exhaust heat are generated. In the cooling circuit (82), the cooling pump is operated, and the heat medium circulates between the power generation unit (81) and the second heat source side heat exchanger (51). In the cooling circuit (82), the heat medium is heated by the exhaust heat of the power generation unit (81) when passing through the power generation unit (81), and is transported when passing through the second heat source side heat exchanger (51). It dissipates heat to the heat medium of the circuit (30) and is cooled.

  Next, the operation of the heat transfer circuit (30) will be described. Hereinafter, the operation of the heat transfer circuit (30) will be described in the order of normal operation, heat storage operation, and use operation.

<Normal operation>
In the normal operation (second operation, fifth operation), as shown in FIG. 3, the first on-off valve (41) is set in the open state, and the second on-off valve (42), the third on-off valve (43), The fourth on-off valve (44) and the fifth on-off valve (45) are set in the closed state. In the heat transfer circuit (30), the heat medium heated by the heat source side heat exchanger (50, 51) flows into the supply side header (33) through the supply passage (31). In the supply side header (33), the heat medium is distributed to each use side heat exchanger (35). In each usage-side heat exchanger (35), the distributed heat medium dissipates heat into the room and is cooled. The heat medium radiated from each user-side heat exchanger (35) merges with the heat medium radiated from the other user-side heat exchanger (35) at the return-side header (34), and the heat source-side heat exchanger (50, It returns to 51) and is heated again.

  In the heat transfer circuit (30), the heat medium circulates between the heat source side heat exchanger (50, 51) and each use side heat exchanger (35), so that the refrigeration apparatus (19) and the power generation apparatus (85) Is transmitted to the room through the heat medium of the heat transfer circuit (30) to heat the room. The point that the heat medium circulates between the heat source side heat exchanger (50, 51) and each use side heat exchanger (35) is the same in the heat storage operation and the use operation described later.

<Heat storage operation>
In the heat storage operation (third operation, sixth operation), as shown in FIG. 4, the first on-off valve (41), the second on-off valve (42), and the fourth on-off valve (44) are set in an open state, The third on-off valve (43) and the fifth on-off valve (45) are set in the closed state. The discharge flow rate of the pump (36) is set to the same value as in normal operation. Hereinafter, differences from the normal operation will be described.

  In the heat transfer circuit (30), since the fourth on-off valve (44) is in the open state, the heat medium under the heat storage tank (37) is sucked into the pump (36) through the first communication passage (62a). And flows out of the heat storage tank (37). The heat medium that has flowed out of the heat storage tank (37) joins the heat medium that has passed through each use side heat exchanger (35), and is sent to the heat source side heat exchanger (50, 51). Further, in the heat transfer circuit (30), since the second on-off valve (42) is in an open state, a part of the heat medium flowing through the supply passage (31) passes through the heat storage tank (37 ). A heat medium having the same flow rate as the flow rate flowing out from the first communication passage (62a) flows into the heat storage tank (37). In the heat storage tank (37), the high temperature heat medium heated by the heat source side heat exchanger (50, 51) flows in and the lower temperature low heat medium flows out, so the amount of heat increases.

  In the heat storage operation, since a part of the heat medium heated by the heat source side heat exchanger (50, 51) is supplied to the heat storage tank (37), warm heat supplied to each use side heat exchanger (35) The flow rate of the medium is reduced compared to the normal operation. Accordingly, since the amount of heat supplied to each use side heat exchanger (35) is smaller than that in the normal operation, the heating capacity in each use side heat exchanger (35) is lower than that in the normal operation.

<Usage behavior>
In the use operation (first operation, fourth operation), as shown in FIG. 5, the first on-off valve (41), the third on-off valve (43), and the fifth on-off valve (45) are set to the open state, The second on-off valve (42) and the fourth on-off valve (44) are set in the closed state. The discharge flow rate of the pump (36) is set to a larger value than in normal operation. Hereinafter, differences from the normal operation will be described.

  In the heat transfer circuit (30), since the fifth on-off valve (45) is in the open state, the warm heat medium in the upper layer of the heat storage tank (37) flows out through the outflow passage (64). The warm heat medium that has flowed out of the heat storage tank (37) merges with the heat medium heated by the heat source side heat exchanger (50, 51), and is supplied to each use side heat exchanger (35). In the heat transfer circuit (30), since the third on-off valve (43) is in an open state, a part of the heat medium discharged from the pump (36) stores heat through the second communication passage (62b). Supplied to the tank (37). A heat medium having the same flow rate as the flow rate flowing out from the outflow passage (64) flows into the heat storage tank (37). In the heat storage tank (37), the high-temperature heat medium in the upper layer flows out, and the relatively low-temperature heat medium after heat dissipation flows in, so the amount of heat is reduced.

  In use operation, a warm heat medium is supplied not only from the heat source side heat exchanger (50, 51) but also from the heat storage tank (37) to each use side heat exchanger (35), so each use side heat exchanger ( The warm heat medium supplied to 35) increases compared to normal operation. Accordingly, since the amount of heat supplied to each use side heat exchanger (35) is larger than that in the normal operation, the heating capacity in each use side heat exchanger (35) is higher than that in the normal operation.

-Effect of Embodiment 1-
In this Embodiment 1, since the supply destination of the electric power generated by the power generation device (85) can be switched between the power demand section (14) and the refrigeration device (19), it is generated by the power generation device (85). The consumed power is consumed by either the power demand section (14) or the refrigeration apparatus (19). For this reason, it can suppress that the electric power which generate | occur | produced with the electric power generating apparatus (85) is surplus compared with the case where the supply destination of the electric power generated with the electric power generating apparatus (85) is only a refrigeration apparatus (19). Accordingly, it is possible to effectively use the power generated by the power generation device (85).

  In the first embodiment, since the refrigeration apparatus (19) is driven only by the electric power generated by the power generation apparatus (85), it is not necessary to connect the refrigeration apparatus (19) to a power source. Therefore, the refrigeration apparatus (19) can be installed where there is no power source.

  Moreover, in this Embodiment 1, since the thermal storage tank (37) for storing the heat medium heated by the freezing apparatus (19) and the electric power generating apparatus (85) is provided in the heat transfer circuit (30), the use side The amount of heat of the heat medium supplied to the heat exchanger (35) can be adjusted by the heat storage tank (37). When the amount of heat of the heat medium supplied to the use side heat exchanger (35) is adjusted, the heating capacity in the use side heat exchanger (35) is adjusted. For this reason, heating in the use side heat exchanger (35) without operating the refrigeration apparatus (19), that is, without setting the supply destination of the power generated by the power generation apparatus (85) to the refrigeration apparatus (19). Ability can be increased. Therefore, even when the heating load is relatively large, the power supply unit (14) can be set as the supply destination of the power generated by the power generation device (85). It becomes possible to supply a large amount of power to (14).

  Moreover, in this Embodiment 1, even if the heating load in a use side heat exchanger (35) becomes high to some extent, when a certain amount of electric power is required in an electric power demand part (14), it is the refrigeration apparatus (19). Electric power is supplied from the power generator (85) to the power demand section (14) without performing the operation. Here, if there is no heat storage tank (37) in the heat transfer circuit (30), when the heating load in the use side heat exchanger (35) becomes high, if the refrigeration unit (19) is not operated, the use side The heating capacity in the heat exchanger (35) cannot be increased. On the other hand, in this Embodiment 1, since the heating capability in a utilization side heat exchanger (35) can be adjusted with a heat storage tank (37), even when a heating load becomes high, a heat storage tank (37). It is possible to cover the heating load by the internal heat and the exhaust heat of the power generation device (85). For this reason, even if the heating load in the user-side heat exchanger (35) is increased to some extent, if a certain amount of power is required in the power demand section (14), the power generated in the power generator (85) is It becomes possible to supply to the demand department (14). Therefore, the timing at which the power supply destination from the power generation device (85) is switched from the refrigeration device (19) to the power demand section (14) is less affected by fluctuations in the heating load.

  Moreover, in this Embodiment 1, since the driving | operation of a freezing apparatus (19) becomes unnecessary when a heating load becomes small, the supply destination of the electric power which generate | occur | produced in the electric power generating apparatus (85) is set to an electric power demand part (14). Is done. The reduction in the heating load is detected using the third determination value (T3). Therefore, when the heating load is reduced, the supply destination of the power generated by the power generation device (85) can be appropriately switched to the power demand section (14).

  In Embodiment 1, the amount of heat of the heat medium supplied to the use-side heat exchanger (35) is adjusted by the heat storage tank (37), so that the amount of circulation of the refrigerant in the refrigerant circuit (21) is not adjusted. In addition, it is possible to adjust the heating capacity in the use side heat exchanger (35). The heating capacity in the use side heat exchanger (35) can be adjusted even if the amount of heat obtained by the refrigeration cycle is constant.

  Here, in the conventional heating system (for example, patent document 1), the operating capacity of the compressor was controlled according to the temperature of the warm water returning from the floor heating panel to the warm water heat exchanger. The temperature of the warm water returning to the warm water heat exchanger decreases as the heating load increases. That is, in the conventional heating system, the circulation amount of the refrigerant in the refrigerant circuit is adjusted according to the heating load. On the other hand, the amount of heat obtained by the refrigeration cycle in the refrigerant circuit is determined by the circulation amount of the refrigerant in the refrigerant circuit. And if the circulation amount of the refrigerant | coolant in a refrigerant circuit changes, the coefficient of performance (COP) of a refrigerating cycle will also change in connection with it. The reason is that the performance of the heat exchanger changes when the flow rate of the refrigerant passing through the heat exchanger changes, or the efficiency of the compressor changes when the rotation speed of the compressor changes. For this reason, when the heating capacity is adjusted only by changing the amount of heat obtained by the refrigeration cycle as in the conventional heating system, the fluctuation range of the circulation amount of the refrigerant in the refrigerant circuit becomes large. For this reason, in the conventional heating system, the amount of time that the circulation amount of the refrigerant in the refrigerant circuit has to be set to such a value that a high coefficient of performance cannot be obtained becomes long, and the operating efficiency of the heating system is reduced. There was a fear.

  On the other hand, in the first embodiment, the heating capacity in the use side heat exchanger (35) can be adjusted without adjusting the refrigerant circulation amount in the refrigerant circuit (21). Compared with the case where the heating capacity is adjusted only by the cycle, the fluctuation range of the circulation amount of the refrigerant in the refrigerant circuit (21) becomes smaller. Accordingly, since the time for which the amount of refrigerant circulating in the refrigerant circuit (21) has to be set to such a value that a high coefficient of performance cannot be obtained can be shortened, the operating efficiency of the heating system can be improved. .

  In Embodiment 1, since the heat medium is further heated downstream of the first heat source side heat exchanger (50) in the heat transfer circuit (30), the heat release temperature of the refrigerant in the refrigeration apparatus (19) is changed to the first heat source side heat exchanger (50). The heat source side heat exchanger (51) can be set to a lower value compared to the case where there is no heat source side heat exchanger (51). Therefore, the input of the compressor (22) of the refrigeration apparatus (19) can be reduced, and the energy consumption in the refrigeration apparatus (19) can be reduced.

  In the first embodiment, a compressor having a fixed operating capacity is used as the compressor (22) of the refrigerant circuit (21). For this reason, by designing the refrigerant circuit (21) so that the coefficient of performance in the operating capacity of the compressor (22) is high, it is possible to operate in a state where the coefficient of performance is always high. Therefore, the operating efficiency of the heating system (10) can be improved.

-Modification of Embodiment 1-
A modification of the first embodiment will be described. In this modification, as shown in FIG. 6, in the heat transfer circuit (30), the second heat source side heat exchanger (51) is replaced with the first heat source side heat exchanger (50) in the heat transfer circuit (30). Arranged in parallel position.

  In this arrangement, the temperature of the heat medium at the outlet of the power generation unit (81) in the cooling circuit (82) is the same as the temperature of the heat medium at the outlet of the first heat source side heat exchanger (50) in the heat transfer circuit (30). Used when it is assumed that they are equivalent. This arrangement is employed, for example, when carbon dioxide is used as the refrigerant of the refrigeration apparatus (19) and the power generation apparatus (81) is provided with a gas engine.

  In this modification, in the heat transfer circuit (30), the flow rate of the heat medium in the first heat source side heat exchanger (50) is reduced by the amount that the heat medium flows through the second heat source side heat exchanger (51). For this reason, in the refrigeration apparatus (19), the amount of heat necessary for heating the heat medium of the heat transfer circuit (30) is reduced. Therefore, the input of the compressor (22) of the refrigeration apparatus (19) can be reduced, and the energy consumption in the refrigeration apparatus (19) can be reduced.

<< Embodiment 2 of the Invention >>
A second embodiment of the present invention will be described. This Embodiment 2 is a heating hot-water supply system (11) provided with the heating system (10) which concerns on this invention. Below, a different point from the said Embodiment 1 is demonstrated.

  As shown in FIG. 7, in the second embodiment, the indoor circuit (100) in which the heat medium that exchanges heat with the water in the heat transfer circuit (30) circulates is constituted by, for example, a plate heat exchanger. It is connected to the second flow path of the side heat exchanger (35). The first flow path of the use side heat exchanger (35) is connected to the heat transfer circuit (30). In the second embodiment, the number of use side heat exchangers (35) is one. Further, according to the second embodiment, since the heat exchanger installed indoors is provided in the indoor circuit (100), it is not necessary to arrange the heat transfer circuit (30) indoors. Therefore, it is possible to incorporate the refrigerant circuit (21) and the heat transfer circuit (30) into one outdoor unit.

  The indoor circuit (100) is provided with a plurality of indoor heat exchangers (105). The plurality of indoor heat exchangers (105) are connected in parallel to each other between the headers (103, 104). The indoor heat exchanger (105) is configured as a floor heating radiator installed on the back side of the floor material or a radiator installed in the indoor space.

  The indoor circuit (100) is provided with an indoor pump (101) having a constant discharge flow rate between the return side header (104) and the use side heat exchanger (35). An expansion tank (102) for releasing the pressure in the indoor circuit (100) is connected to the suction side of the indoor pump (101).

  A water supply circuit (90) is connected to the heat transfer circuit (30). The water supply circuit (90) includes a city water side passage (91) for supplying city water to the heat transfer circuit (30) and a use side passage extending to the use side such as a bathtub in a bathroom and a shower or a kitchen faucet. (92). The exit end of the city water side passageway (91) is connected to the junction passageway (63). On the other hand, the inlet end of the use side passageway (92) is connected to the outflow passageway (64).

  The use side passage (92) is provided with a mixing valve (95). A branch passage (93) branched from the city water side passage (91) is connected to the mixing valve (95). The mixing valve (95) is configured to be able to adjust the flow rate ratio between the warm water flowing through the use side passage (92) and the water flowing from the branch passage (93) according to the water temperature required on the use side. .

  The city water side passageway (91) is provided with a check valve (98) that allows only the flow of water toward the heat storage tank (37). An escape passage (97) for releasing the pressure of the heat storage tank (37) is connected to the top of the heat storage tank (37). A relief valve (96) is provided in the relief passage (97).

-Driving action-
In the heating and hot water supply system (11) of the second embodiment, an operation when using hot water on the use side of the water supply circuit (90) will be described.

  When the heat transfer circuit (30) performs normal operation, as shown in FIG. 8, low temperature water flows into the heat storage tank (37) through the city water side passageway (91) and is used from the heat storage tank (37). Hot water flows out through the side passage (92). In the heat storage tank (37), the amount of hot water decreases.

  When the heat transfer circuit (30) performs a heat storage operation, as shown in FIG. 9, part of the hot water flowing through the supply passage (31) flows into the heat storage tank (37) through the inflow passage (61). From the heat storage tank (37), hot water flows out through the use side passage (92) and low temperature water flows out through the junction passage (63). The water from the city water side passageway (91) joins the joining passageway (63).

  When the heat transfer circuit (30) performs the use operation, as shown in FIG. 10, the heat storage tank (37) has a part of the water discharged from the pump (36) through the junction passage (63) and the city. Water supplied from the water side passageway (91) flows in. Hot water flows out of the heat storage tank (37) through the outflow passageway (64). The high-temperature water flowing out from the heat storage tank (37) branches into the supply passage (31) side and the use side passage (92).

<< Other Embodiments >>
You may comprise the said embodiment like the following modifications.

-First modification-
In the first modification, as shown in FIG. 11, cooling heat exchangers (107, 107) are provided in the return passage (32) of the heat transfer circuit (30). A plurality of cooling heat exchangers (107, 107) are provided and connected in parallel between the headers (108, 109). Each cooling heat exchanger (107) is accommodated in an indoor unit installed in the room (not shown). Each indoor unit is provided with an indoor fan (110) that sends air to the cooling heat exchanger (107).

  In this first modification, the water cooled in each use side heat exchanger (35) is further cooled by exchanging heat with the air sent by the indoor fan (110) in each cooling heat exchanger (107). The The air heated by each cooling heat exchanger (107) is supplied indoors. The temperature of the water returning to the first heat source side heat exchanger (50) is lower than that in the case where there is no cooling heat exchanger (107).

  In the refrigerant circuit (21) of the first modification, a supercritical refrigeration cycle in which the high pressure of the refrigeration cycle is higher than the critical pressure of the refrigerant is performed. Carbon dioxide is used as the refrigerant in the refrigerant circuit (21).

  Here, when a supercritical refrigeration cycle is performed in the refrigerant circuit (21), if there is no cooling heat exchanger (107), the temperature of the heat medium returning to the first heat source side heat exchanger (50) is relatively low. The temperature of the refrigerant that becomes higher and dissipates heat in the first heat source side heat exchanger (50) also becomes a relatively high temperature (for example, about 40 ° C.). For this reason, there is a problem that the amount of heat of the refrigerant that can be used as warm heat is small, and the coefficient of performance of the refrigeration cycle in the refrigerant circuit (21) does not become so high.

  On the other hand, in this 1st modification, the heat heat of the water which passed each use side heat exchanger (35) is utilized with each heat exchanger for cooling (107), and the 1st heat source side heat exchanger ( The temperature of the heat medium returning to 50) is lowered, and the temperature of the refrigerant radiated by the first heat source side heat exchanger (50) is also lowered (for example, about 20 ° C.). That is, the amount of heat of the refrigerant that can be used as warm heat increases. At this time, the energy required to compress the refrigerant in the compressor (22) does not increase. Therefore, it is possible to obtain a high coefficient of performance in the refrigerant circuit (21) by providing the cooling heat exchanger (107).

-Second modification-
In the second modification, as shown in FIG. 12, the heat transfer circuit (30) is provided with two pumps of a main pump (36) and a sub pump (39). The main pump (36) is disposed in the return passage (32). The sub pump (39) is disposed in the second communication passage (62b). In the second modification, the return passage (32) side of the second communication passage (62b) is connected to the suction side of the main pump (36).

  The controller (55) operates the sub pump (39) only during the use operation. As shown in FIG. 12, the sub pump (39) sends a part of the heat medium flowing through the return passage (32) to the lower part of the heat storage tank (37) during the use operation, and stores heat through the outflow passage (64). Allow the warm heat transfer medium in the tank (37) to flow out. Note that the discharge flow rate of the main pump (36) during the use operation is the same as the normal operation value, unlike the above embodiment. That is, the discharge flow rate of the main pump (36) is always constant. For this reason, a pump with a fixed discharge flow rate can be used for the main pump (36).

  In the second modification, the flow rate of the heat medium sent to the lower part of the heat storage tank (37) during the use operation is determined by the discharge flow rate of the sub pump (39). In the heat storage tank (37), the warm heat medium supplied to each use side heat exchanger (35) is pushed out by the heat medium sent to the lower part. Therefore, the flow rate of the warm heat medium supplied from the heat storage tank (37) to each usage-side heat exchanger (35) during the usage operation is determined by the discharge flow rate of the sub pump (39). At this time, the flow rate of the warm heat medium supplied from the heat storage tank (37) to each use side heat exchanger (35) can be easily set to a desired flow rate.

-Third modification-
In the said embodiment, the thermal storage tank (37) may be arrange | positioned on the supply channel | path (31). In this case, an on-off valve is provided between the heat storage tank (37) and the supply side header (33). In the fourth modification, the heat of the heat medium heated by the refrigeration apparatus (19) and the power generation apparatus (85) is stored in the heat storage tank (37), and the on-off valve is controlled according to the total heating load, The amount of heat of the heat medium supplied to each use side heat exchanger (35) is adjusted.

  In addition, the above embodiment is an essentially preferable illustration, Comprising: It does not intend restrict | limiting the range of this invention, its application thing, or its use.

  As described above, the present invention is useful for a heating system that heats a heat medium of a heat transfer circuit provided with a use-side heat exchanger by a refrigeration apparatus that performs a refrigeration cycle.

It is a schematic block diagram of the heating system which concerns on this Embodiment 1. FIG. It is a graph which shows the relationship between the operation | movement of the heat transfer circuit in the heating system which concerns on this Embodiment 1, and a heating load and electric power demand. It is a schematic block diagram which shows the flow of the water of the heat transfer circuit during normal operation | movement of the heating system which concerns on this Embodiment 1. FIG. It is a schematic block diagram which shows the flow of the water of the heat transfer circuit during the heat storage operation | movement of the heating system which concerns on this Embodiment 1. FIG. It is a schematic block diagram which shows the flow of the water of the heat conveyance circuit during utilization operation | movement of the heating system which concerns on this Embodiment 1. It is a schematic block diagram of the heating system which concerns on the modification of this Embodiment 1. It is a schematic block diagram of the heating hot-water supply system which concerns on this Embodiment 2. It is a schematic block diagram which shows the flow of the water of the heat transfer circuit during normal operation of the heating hot-water supply system which concerns on this Embodiment 2, and the circuit for water supply. It is a schematic block diagram which shows the flow of the water of the heat transfer circuit during the thermal storage operation | movement of the heating hot-water supply system which concerns on this Embodiment 2, and the circuit for water supply. It is a schematic block diagram which shows the flow of the water of the heat transfer circuit during the utilization operation | movement of the heating hot-water supply system which concerns on this Embodiment 2, and the circuit for water supply. It is a schematic block diagram of the heating system which concerns on the 1st modification of other embodiment. It is a schematic block diagram of the heating system which concerns on the 2nd modification of other embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Heating system 12 1st switch 13 2nd switch 14 Electric power demand part 16 Outlet 19 Refrigeration device 21 Refrigerant circuit 30 Heat transfer circuit 35 Use side heat exchanger 36 Pump 37 Heat storage tank 50 1st heat source side heat exchanger 51 2nd heat source Side heat exchanger 55 Controller 81 Power generation unit 82 Cooling circuit 85 Power generation device

Claims (6)

A heat transfer circuit (30) for circulating a heat medium between the heat source side heat exchanger (50, 51) and the use side heat exchanger (35);
The refrigerant is circulated to perform a refrigeration cycle, connected to the heat source side heat exchanger (50, 51), and the heat source side heat exchanger (50, 51) uses the refrigerant to transfer the heat medium of the heat transfer circuit (30). A refrigeration unit (19) for heating,
A heating system that uses the heat released by the heat medium in the use side heat exchanger (35) for indoor heating,
A power generator (85) that generates electric power and exhaust heat and heats the heat medium supplied to the use side heat exchanger (35) in the heat transfer circuit (30) by the exhaust heat;
The heating system characterized in that the supply destination of the power generated by the power generation device (85) is switchable between the power demand section (14) operated by the power and the refrigeration device (19) . In claim 1,
The refrigeration device (19) is driven only by the electric power generated by the power generation device (85),
A heating system characterized in that the operation of the refrigeration apparatus (19) is stopped while the electric power generated in the power generation apparatus (85) is supplied to the power demand section (14). In claim 2,
The heat transfer circuit (30) includes a heat storage tank (37) for storing a heat medium heated by the refrigeration apparatus (19) and the power generation apparatus (85), and uses the heat storage tank (37). A heating system characterized in that the heat quantity of the heat medium supplied to the use side heat exchanger (35) is adjustable. In claim 3,
Even when the heating load in the use side heat exchanger (35) is equal to or higher than a predetermined heating side reference value, the power demand or power load in the power demand section (14) is equal to or higher than a predetermined power side reference value Is configured such that the supply destination of the electric power generated by the power generation device (85) is set in the electric power demand section (14). In any one of Claims 1 thru | or 3,
A heating system configured to determine a supply destination of power generated by the power generation device (85) using the power demand or power load in the power demand section (14). In claim 2 or 3,
When the heating load in the use side heat exchanger (35) is smaller than a predetermined low load judgment value, the supply destination of the power generated in the power generation device (85) is set in the power demand section (14). It is comprised so that it may be comprised, The heating system characterized by the above-mentioned.

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