JP7527066B1 - Power Generation System - Google Patents

Abstract

[Problem] To provide a power generation system capable of generating electricity without using fuel. [Solution] A power generation system 10 is configured that includes a compressor 11 that discharges compressed air, a heat exchanger 12 that transfers heat from the compressed air to water to generate steam, a turbine 15 that converts the thermal energy of the steam into rotational energy, and a generator 17 that converts the rotational energy of the turbine 15 into electrical energy. [Selected Figure] Figure 1

Description

This disclosure relates to a power generation system that generates electricity using a generator connected to a turbine.

One example of a power generation system that rotates a turbine to generate electricity using a generator connected to the turbine is described in Patent Document 1. In the power generation system described in Patent Document 1, steam generated by burning fuel in a steam boiler reaches a steam turbine, which rotates a generator to generate electricity. The steam expanded in the steam turbine is condensed in a condenser to become condensate, which is pressurized by a condensate pump and then heated by a feedwater heater. Steam extracted from the steam turbine is used as the heat source.

Japanese Utility Model Application Publication No. 4-132409

The inventors of the present application recognized that the power generation system described in Patent Document 1 has a problem in that it is necessary to combust fuel in a steam boiler.

The objective of this disclosure is to provide a power generation system that can generate electricity using a generator without using fuel.

In this embodiment, a power generation system is configured that includes a compressor that discharges compressed air, a first heat exchanger that transfers heat from the compressed air to water to generate steam, a first turbine that converts the thermal energy of the steam into rotational energy, and a first generator that converts the rotational energy of the first turbine into electrical energy.

The power generation system of this embodiment makes it possible to generate electricity using a generator without using fuel.

1 is a conceptual diagram showing a first embodiment of a power generation system. FIG. 4 is a conceptual diagram showing a second embodiment of the power generation system. FIG. 11 is a conceptual diagram showing a third embodiment of the power generation system. FIG. 13 is a conceptual diagram showing a fourth embodiment of the power generation system. FIG. 13 is a conceptual diagram showing a fifth embodiment of the power generation system.

(overview)
The power generation system disclosed in this embodiment includes a generator and a turbine connected to the generator, and does not use fuel in the process of generating a fluid that rotates the turbine. Hereinafter, several embodiments included in the power generation system will be described with reference to the drawings. In each drawing for describing several embodiments of the power generation system, the same components are given the same reference numerals, and repeated description will be omitted.

First Embodiment
A first embodiment of the power generation system is shown in FIG. 1. The power generation system 10 includes devices and equipment such as a compressor 11, heat exchangers 12, 13, 14, turbines 15, 16, generators 17, 18, a water storage pit 19, an expansion pit 20, pumps 21, 22, 23, and a fan 24. The power generation system 10 shown in FIG. 1 is a conceptual diagram, and the positional relationship between the devices constituting the power generation system 10 is not limited to that shown in FIG. 1. For example, the turbines 15, 16 are disposed above the water storage pit 19 in the direction of gravity. The compressor 11 is an air machine having two suction ports 25, 26 and one discharge port 27. The compressor 11 is driven by an electric motor. The electric motor is a prime mover that is rotated by the supply of electric power. The compressor 11 pressurizes air sucked from at least one of the two suction ports 25, 26, and discharges the compressed air from the discharge port 27. The outlet 27 is connected to a passage 29 .

The heat exchanger 12 has two inlets 30, 31 and two outlets 32, 33. The inlet 30 is connected to the outlet 33, and the inlet 31 is connected to the outlet 32. The inlet 30 is connected to the passage 29, and the inlet 31 is connected to the passage 34. The outlet 32 is connected to the passage 35, and the outlet 33 is connected to the passage 36. The heat exchanger 12 has a function of generating water vapor (gas) by transferring heat of the compressed air sent from the compressor 11 to the inlet 30 to water supplied from the inlet 31. The generated water vapor is sent from the outlet 32 to the passage 35. The compressed air whose temperature has been reduced by heat transfer is sent from the outlet 33 to the passage 36.

The turbine 15 is a steam turbine, and has a rotating shaft with fixed blades, an inlet 37, and an outlet 38. The inlet 37 is connected to the passage 35, and the outlet 38 is connected to the passage 39. The turbine 15 is a device that converts the thermal energy of a gas, for example, steam, into the rotational energy of a rotating shaft. The turbine 15 converts high-temperature, high-pressure steam sent from the heat exchanger 12 to the inlet 37 into the rotational energy of the rotating shaft by blowing it against the fixed blades and ejecting it. The steam blown against the blades is cooled, and is discharged from the outlet 38 to the passage 39.

The generators 17 and 18 may be either DC generators or AC generators. The generators 17 and 18 have, for example, a rotor, a stator, a permanent magnet attached to the stator, and a coil wound around the rotor. The rotor of the generator 17 is connected to the rotating shaft of the turbine 15, and the rotor of the generator 18 is connected to the rotating shaft of the turbine 16. When the generators 17 and 18 rotate, a current flows through the coil due to the principle of electromagnetic induction. In this way, the generators 17 and 18 convert the rotational energy (mechanical energy) applied to the rotor into electrical energy and output it. The power generated by the generators 17 and 18 is supplied to the power supply destination 40. The power supply destination includes a secondary battery, an electrical device, etc.

The water storage pit 19 is a tank that stores water as a compressible fluid. The water storage pit 19 has two outlets 41, 42, and the pump 21 is connected to the outlet 41. The pump 21 sucks water from the water storage pit 19, pressurizes the sucked water, and discharges it into the passage 34.

The expansion pit 20 is a device that reduces the pressure of compressed air by ejecting it into the container body and expanding it, and generates liquid air (liquefied air) by lowering the temperature of the compressed air to a low temperature of -140°C or lower. The expansion pit 20 has, for example, a container body, a diaphragm provided inside the container body, a storage chamber formed in the container body by the diaphragm, and two inlets 43, 44 and an outlet 45 connected to the storage chamber. The container body is kept in an insulated state. The air sent to the expansion pit 20 expands in volume and becomes liquid air. The inlet 43 is connected to the passage 36, and the inlet 44 is connected to the passage 46. In addition, a pump 22 is provided. The pump 22 sucks in liquid air from the outlet 45 of the expansion pit 20 and discharges the sucked liquid air into the passage 47.

The heat exchanger 13 has two inlets 48, 49 and two outlets 50, 51. The inlet 48 is connected to the outlet 51, and the inlet 49 is connected to the outlet 50. The inlet 48 is connected to the passage 47, and the inlet 49 is connected to the passage 52. The outlet 50 is connected to the passage 46, and the outlet 51 is connected to the passage 53. The heat exchanger 13 transfers the heat of the air sent to the inlet 49 to the liquid air sent to the inlet 48 to vaporize it. The gas obtained in the heat exchanger 13, that is, the air, is sent from the outlet 51 to the passage 53. In the heat exchanger 13, the air whose temperature has been reduced by transferring heat to the liquid air is sent from the outlet 50 through the passage 46 to the expansion pit 20.

The pump 23 sucks water from the water storage pit 19 through the outlet 42 and discharges the sucked water to the passage 54. The heat exchanger 14 has two inlets 55, 56 and two outlets 57, 58. The inlet 55 is connected to the outlet 57, and the inlet 56 is connected to the outlet 58. The inlet 55 is connected to the passage 54, and the inlet 56 is connected to the passage 59. The outlet 57 is connected to the water storage pit 19 through the passage 60, and the outlet 58 is connected to the inlet 49 through the passage 52.

The fan 24 is an air machine that draws in and expels outside air, and is rotated by, for example, an electric motor. The air expelled from the fan 24 is sent to the inlet 56 via a passage 59. The heat exchanger 14 transfers the heat of the water sent to the inlet 55 to the air sent to the inlet 56, thereby raising the temperature of the air. The air whose temperature has been raised is sent to the inlet 49 through the passage 52. In the heat exchanger 14, the water whose temperature has been reduced by heat transfer is returned from the outlet 57 through the passage 60 to the water storage pit 19.

The turbine 16 has a similar configuration to the turbine 15, and has an inlet 61 and an outlet 62. The inlet 61 is connected to the passage 53, and the outlet 62 is connected to the suction port 26 of the compressor 11 via a passage 63. When high-temperature, high-pressure steam is sent from the heat exchanger 13 to the inlet 61, the rotating shaft of the turbine 16 is rotated according to the same principle as the turbine 15. The steam sent to the turbine 16 is vaporized as its temperature is reduced, and then discharged into the passage 63.

(Operation example of the first embodiment)
An example of the operation of the power generation system 1 shown in Fig. 1 is as follows: When the compressor 11 is driven, high-temperature, high-pressure compressed air discharged from the compressor 11 is sent to the inlet 30 of the heat exchanger 12 through a passage 29. Also, a part of the water in the water storage pit 19 is sucked into the pump 21, and the water discharged from the pump 21 is sent to the inlet 31 of the heat exchanger 12 through a passage 34.

In the heat exchanger 12, the heat of the compressed air sent to the inlet 30 is transferred to the water sent to the inlet 31, generating steam. The steam generated in the heat exchanger 12 is sent to the passage 35. In addition, the compressed air whose temperature has been reduced in the heat exchanger 12 is sent to the expansion pit 20 through the passage 36.

The rotating shaft of the turbine 15 is rotated by the thermal energy of the steam, and electricity is generated by the generator 17. The steam, whose temperature has been reduced by the turbine 15, is sent to the water storage pit 19 through a passage 39, where the temperature of the steam is reduced and the steam liquefies (to water). The lower temperature portion of the water in the water storage pit 19 accumulates at the bottom, and this lower temperature portion of the water is sucked in by the pump 23, pressurized by the pump 23, and sent through passage 54 to the inlet 55 of the heat exchanger 14.

In the heat exchanger 14, the heat of the water sent to the inlet 55 is transferred to the air sent to the inlet 56, and the temperature of the air increases. The high-temperature air discharged from the heat exchanger 14 is sent to the inlet 49 of the heat exchanger 13 through the passage 52. The water whose temperature has been reduced in the heat exchanger 14 is sent to the water storage pit 19 through the passage 60.

The pump 22 sucks in liquid air from the expansion pit 20, pressurizes the sucked liquid air, and discharges it into the passage 47. The heat of the high-temperature air sent to the inlet 49 of the heat exchanger 13 is transferred from the passage 47 to the liquid air sent to the inlet 48 of the heat exchanger 13, and the liquid air is vaporized in the heat exchanger 13. The air whose temperature has been reduced in the heat exchanger 13 is sent to the expansion pit 20 through the passage 46, where it is cooled and becomes liquid air.

The rotating shaft of the turbine 16 is rotated by the thermal energy of the air sent from the heat exchanger 13, and the generator 18 generates electricity. The air whose temperature has been reduced by the turbine 16 is sucked into the intake 26 of the compressor 11 through the passage 63. When the compressor 11 sucks in the air, the outlet 62 becomes negative pressure, and the turbine efficiency of the turbine 16 improves. The turbine efficiency indicates how much of the heat amount (theoretical work) given to the turbine 16 is converted into the output of the turbine 16. The electricity generated by the generator 18 is sent to the power supply destination 40. In the first embodiment of the power generation system 10, no fuel is required to generate the steam sent to the turbine 15 and the air sent to the turbine 16. Therefore, electricity can be generated by the generators 17 and 18 without using fuel.

Second Embodiment
A second embodiment of the power generation system is shown in Fig. 2. The power generation system 10 includes a compressor 64, heat exchangers 65 and 66, turbines 67 and 68, and generators 69 and 70. The compressor 64 is an air machine having an inlet 71 and an outlet 72. The compressor 64 is driven by an electric motor. The inlet 71 is connected to a passage 73, and the outlet 72 is connected to a passage 74.

The heat exchanger 65 has two inlets 75, 76 and two outlets 77, 78. The inlet 75 is connected to the outlet 78, and the inlet 76 is connected to the outlet 77. The inlet 75 is connected to the expansion pit 20 via the passage 47, and the inlet 76 is connected to the compressor 64 via the passage 74. The outlet 77 is connected to the passage 79, and the outlet 78 is connected to the passage 80. The heat exchanger 65 transfers the heat of the high-temperature, high-pressure compressed air sent from the compressor 64 to the liquid air sent to the inlet 75 to vaporize it. The air generated by the heat exchanger 65 is sent from the outlet 78 to the passage 80. The compressed air whose temperature has been reduced by heat transfer is sent from the outlet 77 to the passage 79.

The turbine 67 has the same configuration and function as the turbine 15, and has an inlet 81 and an outlet 82. The inlet 81 is connected to the passage 80, and the outlet 82 is connected to the passage 63. The generator 69 has the same configuration and function as the generator 17. The rotor of the generator 69 is connected to the rotating shaft of the turbine 67. When the turbine 67 is rotated by the thermal energy of the air sent from the heat exchanger 65, the generator 69 generates electricity, and the electricity generated by the generator 69 is supplied to the power supply destination 40. The air leaving the outlet 82 of the turbine 67 is sucked into the suction port 26 of the compressor 11 through the passage 63.

The heat exchanger 66 has two inlets 83, 84 and two outlets 85, 86. The inlet 83 is connected to the outlet 85, and the inlet 84 is connected to the outlet 86. The inlet 83 is connected to the passage 52, and the inlet 84 is connected to the passage 79. The outlet 85 is connected to the passage 46, and the outlet 86 is connected to the passage 87. The heat exchanger 66 generates water vapor by transferring heat from the high-temperature air sent to the inlet 83 to the air sent to the inlet 84. The generated water vapor is sent from the outlet 86 to the passage 87. The air whose temperature has been reduced by the heat transfer is sent from the outlet 85 to the passage 46. A pump 88 may be provided in the passage 79. The pump 88 has the function of pressurizing the air coming out of the outlet 77 and sending it to the inlet 84.

The turbine 68 has the same configuration and function as the turbine 15, and has an inlet 89 and an outlet 90. The inlet 89 is connected to the passage 87, and the outlet 90 is connected to the passage 73. The generator 70 has the same configuration and function as the generator 17. The rotor of the generator 70 is connected to the rotating shaft of the turbine 68. When the rotating shaft of the turbine 68 is rotated by the thermal energy of the steam sent from the heat exchanger 66, the generator 70 generates electricity, and the electricity generated by the generator 70 is supplied to the power supply destination 40. The air leaving the outlet 90 of the turbine 68 is sucked into the suction port 71 of the compressor 64 through the passage 73.

(Operation example of the second embodiment)
An example of the operation of the power generation system 10 shown in Fig. 2 is as follows. The heat exchanger 65 transfers heat from the high-temperature, high-pressure compressed air sent from the compressor 64 to liquid air supplied from the inlet 75 to vaporize it. The air generated by the heat exchanger 65 is sent from the outlet 78 to the passage 80. The compressed air whose temperature has been reduced by the heat transfer is sent from the outlet 77 to the passage 79. The turbine 67 is rotated by the air sent from the heat exchanger 65, and the electricity generated by the generator 69 is supplied to the power supply destination 40. The air discharged from the turbine 67 is sucked into the suction port 26 of the compressor 11 through the passage 63.

The heat exchanger 66 generates steam (gas) by transferring heat from the high-temperature air sent to the inlet 83 to the air sent to the inlet 84. The generated steam is sent to the turbine 68. The air, whose temperature has been reduced by the heat transfer, is sent to the passage 46 from the outlet 85. When the turbine 68 is rotated by the steam, the electricity generated by the generator 70 is supplied to the power supply destination 40. The air discharged from the turbine 68 is drawn into the intake port 71 of the compressor 64. The power generation system 10 is capable of transferring the heat of the compressed air discharged from the compressor 11 to water to generate steam, and of transferring heat to the liquid air discharged from the expansion pit 20 to generate air. Therefore, power can be generated by the generators 17 and 70 without using fuel. Other operations of the power generation system 10 in the second embodiment are the same as those of the power generation system 10 in the first embodiment.

Third Embodiment
A third embodiment of the power generation system is shown in Fig. 3. The compressor 64 shown in Fig. 3 draws in outside air from an inlet 71 to generate compressed air, and discharges the compressed air to a passage 74. The outlet 77 of the heat exchanger 65 is connected to an air separator 92 via a passage 91. The heat exchanger 14 does not have an inlet 56 or an outlet 58. The heat exchanger 14 transfers heat of the water sent to the inlet 55 to the outside air to lower the temperature, and discharges the water from the outlet 57. If the water storage pit 19 can be cooled by seawater or the like, the heat exchanger 14 and the pump 23 do not need to be provided.

(Operation example of the third embodiment)
An example of the operation of the power generation system 10 shown in Fig. 3 is as follows. Air coming out of the outlet 77 of the heat exchanger 65 is sent to the air separator 92. The air separator 92 is a device capable of separating air by, for example, a cryogenic separation method to recover nitrogen, oxygen, argon gas, carbon dioxide, and the like. The specific process performed in the air separator 92 is specifically as follows.

First, air is sucked in through a filter and compressed to approximately 0.5 MPa by a compressor. The compressed air is cooled to approximately 80°C, and is then cooled to approximately 10°C in a water-wash cooling tower. The moisture and carbon dioxide that solidify at low temperatures are then adsorbed and removed by an adsorber, and the air introduced into the air separator 92 is cooled to approximately -200°C in a heat exchanger and liquefied. It is then introduced into a rectification tower and distilled, separating the gases by utilizing the difference in their boiling points.

The power generation system 10 is capable of transferring heat from the compressed air discharged from the compressor 11 to water to generate steam, and transferring heat to the liquid air discharged from the expansion pit 20 to generate air. The turbine 15 is rotated by the thermal energy of the steam, and the generator 17 generates electricity. The turbine 67 is rotated by the thermal energy of the air, and the generator 69 generates electricity. Therefore, electricity can be generated by the generators 17 and 69 without using fuel. Other operations of the third embodiment of the power generation system 10 are the same as those of the second embodiment of the power generation system 10.

Fourth Embodiment
A fourth embodiment of the power generation system is shown in Fig. 4. The power generation system 10 includes heat exchangers 94, 95, 96, turbines 97, 98, generators 99, 100, and a liquid nitrogen tank 131. The heat exchanger 94 has two inlets 101, 102 and two outlets 103, 104. The inlet 101 leads to the outlet 103 and the inlet 102 leads to the outlet 104. The inlet 101 is connected to the passage 47 and the inlet 102 is connected to the passage 105. The outlet 103 is connected to the passage 106 and the outlet 104 is connected to the passage 107.

The heat exchanger 94 transfers the heat of the gas sent to the inlet 102 to the liquid air sent to the inlet 101, causing it to evaporate. The air generated by the heat exchanger 94 is sent from the outlet 103 to the passage 106. In the heat exchanger 94, the air whose temperature has been reduced by heat transfer is sent from the outlet 104 to the passage 107. Note that in the initial stage after the power generation system 10 starts operating, the temperature of the air passing through the passage 105 has not increased, and the heat of the outside air is transferred to the liquid air passing through the passage 106, causing it to evaporate. The outside air is at room temperature, for example, in the range of 15°C to 30°C.

The liquid nitrogen tank 131 is a tank that stores liquid nitrogen at -196°C in an unsealed state. The liquid nitrogen tank 131 has an inlet 108 and an outlet 109, with the inlet 108 connected to the passage 107. A pump 111 is provided that draws in liquid nitrogen from the outlet 109, pressurizes it, and discharges it into the passage 110.

The heat exchanger 95 has two inlets 112, 113 and two outlets 114, 115. The inlet 112 is connected to the outlet 114, and the inlet 113 is connected to the outlet 115. The inlet 112 is connected to the passage 106, and the inlet 113 is connected to the passage 110. The outlet 114 is connected to the passage 116, and the outlet 115 is connected to the passage 117. The heat exchanger 95 transfers the heat of the air sent to the inlet 112 to the liquid nitrogen sent to the inlet 113. The liquid nitrogen increases in temperature as the heat is transferred, and expands and vaporizes. The vaporized nitrogen gas is sent from the outlet 115 to the passage 117. The liquid air generated by lowering the temperature of the air in the heat exchanger 95 is sent from the outlet 114 to the passage 120.

The turbine 97 has the same configuration and function as the turbine 15, and has an inlet 118 and an outlet 119. The inlet 118 is connected to the passage 117, and the outlet 119 is connected to the passage 105. The generator 99 has the same configuration and function as the generator 17. The rotor of the generator 99 is connected to the rotating shaft of the turbine 97. When the turbine 97 is rotated by the thermal energy of the nitrogen gas, the generator 99 generates electricity, and the electricity generated by the generator 99 is supplied to the power supply destination 40. The nitrogen gas exiting the outlet 119 of the turbine 97 is sent to the inlet 102 of the heat exchanger 94 through the passage 105. The heat of the nitrogen gas is transferred to the liquid air sent to the inlet 101, where it is vaporized and sent to the passage 106. The nitrogen gas whose temperature has been reduced in the heat exchanger 94 exits from the outlet 104 and returns to the liquid nitrogen tank 131 through the passage 107.

The heat exchanger 96 has two inlets 120, 121 and two outlets 122, 123. The inlet 120 is connected to the outlet 122, and the inlet 121 is connected to the outlet 123. The inlet 120 is connected to the passage 116, and the inlet 121 is connected to the passage 52. The outlet 122 is connected to the passage 124, and the outlet 123 is connected to the inlet 44 of the expansion pit 20 via the passage 125. The heat exchanger 96 transfers the heat of the air sent to the inlet 121 to the air sent to the inlet 120, thereby increasing the temperature of the air. The air whose temperature has been increased by the heat exchanger 96 is sent from the outlet 122 to the passage 124. In the heat exchanger 96, the air whose temperature has been reduced by heat transfer is sent from the outlet 123 through the passage 125 to the expansion pit 20, where it becomes liquid air.

The turbine 98 has the same configuration and function as the turbine 15, and has an inlet 126 and an outlet 127. The inlet 126 is connected to the passage 124, and the outlet 127 is connected to the compressor 11 via the passage 63. The generator 100 has the same configuration and function as the generator 17. The rotor of the generator 100 is connected to the rotating shaft of the turbine 98. When the turbine 98 is rotated by the thermal energy of the air, the generator 100 generates electricity, and the electricity generated by the generator 100 is supplied to the power supply destination 40. The air leaving the outlet 127 of the turbine 98 is sucked into the suction port 26 of the compressor 11 through the passage 63.

(Operation example of the fourth embodiment)
The power generation system 10 shown in Fig. 4 transfers heat from compressed air discharged from the compressor 11 to water to generate steam, and sends the steam to the turbine 15 to generate power with the generator 17. Therefore, power can be generated with the generator 17 without using fuel. Furthermore, no fuel is used in the process of sending nitrogen gas to the turbine 97 and the process of sending air to the turbine 98. Therefore, the power generation system 10 can generate power with the generators 99, 100 without using fuel.

The power generation system 10 in FIG. 4 may also include a passage 128 connecting the passage 29 and the inlet 102 of the heat exchanger 94. Then, a portion of the high-temperature, high-pressure compressed air discharged from the compressor 11 is sent to the inlet 102 of the heat exchanger 94 through the passage 128. Therefore, in the initial stage when the power generation system 10 starts operating, or when the amount of heat of the air sent from the turbine 97 to the heat exchanger 94 is insufficient, the heat of the compressed air is transferred to the liquid air sent to the inlet 101 of the heat exchanger 94, and the temperature of the liquid air increases. Therefore, it becomes easier to generate nitrogen gas sent from the heat exchanger 95 to the passage 117.

The passage 128 may also be connected to the inlet 112 of the heat exchanger 95. Then, a portion of the high-temperature, high-pressure compressed air discharged from the compressor 11 is sent through the passage 128 to the inlet 112 of the heat exchanger 95. Therefore, in the initial stage when the power generation system 10 starts operating, or when the amount of heat in the air sent from the turbine 97 to the heat exchanger 94 is insufficient, the heat of the compressed air is transferred to the air sent to the inlet 112 of the heat exchanger 95, and the temperature of the air rises. Therefore, it becomes easier to generate nitrogen gas sent from the heat exchanger 95 to the passage 117.

Fifth Embodiment
A fifth embodiment of the power generation system is shown in Fig. 5. In the power generation system 10, the air separator 92 is connected to the outlet 114 of the heat exchanger 95 via a passage 129. Also, the heat of the water sent to the inlet 55 of the heat exchanger 14 is dissipated into the atmosphere, lowering the temperature of the water.

(Operation example of the fifth embodiment)
In the power generation system 10 shown in FIG. 5, the liquid air exiting from the outlet 114 of the heat exchanger 95 is sent to the air separator 92 through a passage 129. In the power generation system 10 shown in FIG. 5, as in the first embodiment, the generator 17 can generate power without using fuel. In the power generation system 10 shown in FIG. 5, as in the fourth embodiment, no fuel is used in the process of generating the nitrogen gas sent to the turbine 97. Therefore, the generator 99 can generate power without using fuel. Furthermore, the liquid air exiting from the heat exchanger 95 is sent to the air separator 92 through a passage 129. Therefore, the air is separated in the air separator 92, and nitrogen, oxygen, argon gas, carbon dioxide, and the like can be recovered.

(others)
In each embodiment, the air that does not become liquid air in the heat exchanger 95 can be recovered as solid carbon dioxide. Furthermore, each passage disclosed in each embodiment is formed by a metal pipe, a hole provided in the housing of the device, a hole provided in the housing of the equipment, or the like.

An example of the technical meaning of the matters described in this embodiment is as follows. The power generation system 10 is an example of a power generation system. The compressor 11 is an example of a first compressor. The compressor 64 is an example of a second compressor. The heat exchanger 12 is an example of a first heat exchanger. The heat exchangers 13 and 65 are an example of a second heat exchanger. The turbine 15 is an example of a first turbine. The turbine 16 is an example of a second turbine. The turbine 97 is an example of a third turbine. The generator 17 is an example of a first generator. The generator 18 is an example of a second generator. The generator 99 is an example of a third generator. The expansion pit 20 is an example of a liquid air generator. The air separator 92 is an example of an air separator. The liquid nitrogen tank 131 is an example of a liquid nitrogen tank. The heat exchanger 95 is an example of a third heat exchanger. The water storage pit 19 is an example of a water storage pit. Passage 46 is an example of a first passage. Passage 63 is an example of a second passage.

This disclosure can be used as a power generation system that generates electricity using a generator connected to a turbine.

10...power generation system, 11, 64...compressor, 12, 13, 65, 95...heat exchanger, 15, 16, 97...turbine, 17, 18, 99...generator, 19...water storage pit, 20...expansion pit, 46, 63...passageway, 92...air separator, 131...liquid nitrogen tank

Claims (3)

A compressor that discharges compressed air;
a first heat exchanger that transfers heat from the compressed air to water to generate steam;
A first turbine that converts thermal energy of the steam into rotational energy;
a first generator that converts rotational energy of the first turbine into electrical energy;
a liquid air generator to which the air cooled in the first heat exchanger is sent and which expands the sent air to generate liquid air;
a second heat exchanger for transferring heat to the liquid air sent from the liquid air generator to vaporize the liquid air;
a second turbine that converts the thermal energy of the air obtained in the second heat exchanger into rotational energy;
a second generator that converts the rotational energy of the second turbine into electrical energy;
a second passageway for delivering air exiting the second turbine to an intake of the compressor;
A power generation system comprising: The power generation system according to claim 1,
The power generation system further includes a water storage pit for holding water to be sent to the first heat exchanger, and into which water obtained by lowering the temperature of the steam in the first turbine is sent from the first turbine. The power generation system according to claim 1 ,
The power generation system further includes a first passage for sending air whose temperature has been reduced by transferring heat to the liquid air in the second heat exchanger to the liquid air generator.