CN204555150U - A kind of LNG Power Vessel air conditioner refrigerating/heating system - Google Patents

Abstract

The utility model discloses an air-conditioning refrigeration/heat supply system for an LNG power ship, which comprises an LNG vaporization circuit, an ice cold storage circulation circuit, a heat recovery circuit and a seawater circuit. In summer, the cold energy generated by the vaporization of LNG during the operation of LNG-powered ships is recovered and stored in the cold storage device by using the two-stage refrigerant cold energy transfer method, which is used as the cold source of the air-conditioning system to meet the cooling demand of the ship's cabin; in winter When the vaporized LNG enters the main engine power system of the ship, a large amount of waste heat generated after combustion is recovered and used as the heat source of the air conditioning system to meet the heating demand of the ship's cabin. The utility model utilizes the cold generated during LNG vaporization and the heat released during combustion as the cold and heat sources of the air conditioning system, which not only solves the demand for cold and heat in the cabin of the ship, saves a large amount of investment in the refrigerating unit of the air conditioning system of the ship, but also solves the problem of The technical bottleneck is that the amount of LNG vaporization does not match the cold/heat use, and the vaporization time is not synchronized with the cold/heat use time.

Description

An air-conditioning refrigeration/heating system for an LNG powered ship

technical field

The utility model relates to an air-conditioning refrigeration/heating system of an LNG power ship, specifically to obtain a high-efficiency, energy-saving, green and environment-friendly air-conditioning refrigeration/heating system at a lower cost, in particular to a kind of fully utilizing ice storage to recover LNG power ship operation During the process of gasification, LNG produces a large amount of cold energy as the cooling source of the ship's air conditioning system, and the large amount of waste heat generated when the vaporized LNG is burned is used as the heat source of the ship's air conditioning system. technology field.

Background technique

With the rapid development of economic globalization, the shipbuilding industry is full of vitality, but with the rapid development of the shipbuilding industry, the marine environment is constantly deteriorating. At present, ships mainly use diesel oil as fuel, and its main components are hydrocarbons and some other elements. During the combustion process, a large amount of carbon dioxide, sulfide and dust are emitted, which undoubtedly causes great damage to the marine environment. Therefore, reducing harmful gas emissions in gas has become a key issue in improving environmental pollution. The power ship using LNG as fuel is the general trend of future ship development. At present, the power ship using LNG as the main fuel mainly uses seawater as a heat source to exchange heat with LNG at -163°C to vaporize it. A large amount of high-grade cold energy released by LNG is directly taken away by seawater, resulting in a great waste of energy. The low-temperature seawater that absorbs the vaporization of LNG and produces a large amount of cold energy is directly discharged into the sea, causing serious cold pollution to nearby sea areas.

A ship sailing in the sea is an independent offshore mobile building. It often sails in different sea areas, and the temperature difference varies greatly. In order to ensure the thermal comfort requirements of the crew and passengers, the air conditioning system is an essential part of the ship system.

At present, air-conditioning systems for ships basically use conventional air-cooled or water-cooled systems. The patent with the application number 201310454497.X discloses an air conditioning system for LNG-powered ships. It is composed of a water bath vaporizer, which uses the water bath vaporizer to vaporize LNG, and absorbs and utilizes the released cold energy. Although this system uses the cold energy released by LNG vaporization, fresh water is directly used as the refrigerant in the system. In the heat exchange with LNG in the steam-water heat exchanger, since the heat exchange temperature difference can reach 170-200°C when LNG is vaporized, the refrigerant water for heat exchange may absorb too much cold energy and freeze, making the whole system unable to operate normally. At the same time, the vaporization capacity of LNG in the system must be strictly matched with the refrigeration capacity of the air conditioner, especially when the ship has a small cooling capacity and a large power demand of NG, the system will not be able to meet the LNG vaporization capacity required for the normal operation of the ship.

The patent application number 201420183474.X discloses a LNG cold energy utilization device for LNG-powered ships. The system mainly consists of a fuel tank storing liquefied natural gas. The natural gas output pipeline on the fuel tank passes through the first heat exchanger and the second heat exchanger in sequence. The second heat exchanger is then connected to the gas input port of the engine, the first heat exchanger, the first heat medium storage tank, and the cold energy release device are connected head to tail through pipelines to form the first cold energy utilization circuit, the second heat exchanger, The engine exhaust pipe cooling water jacket and the second heat medium storage tank are connected head to tail through pipes to form the second cold energy release circuit. The first cold energy utilization circuit and the second cold energy release circuit are respectively equipped with heat transfer circuits for the flow of heat in the circuit. Although the system uses a two-stage cooling recovery mode to recover the cooling capacity released by LNG, it can fully absorb the cooling capacity released by LNG. However, this system has great defects in the utilization of cooling capacity. It utilizes the cooling capacity absorbed in the first-stage heat exchanger in the refrigerator room. Since the cooling capacity required for the initial operation and continuous operation of the refrigerator room is quite different, In this system, there is a large difference between the required cooling capacity of the refrigerated room and the release amount of LNG during vaporization, resulting in a serious mismatch between the released cooling capacity and the required cooling capacity, resulting in insufficient LNG vaporization, which affects the normal operation of the ship power system. LNG vaporization demand; in this secondary cold energy recovery system, the absorbed cold energy is used to cool the heated cylinder jacket water in the ship power plant. In many existing technologies, there is a lot of recovery and utilization of waste heat from cooling cylinder jacket water of marine engines. This system uses the cooling energy released from LNG to cool cylinder jacket water, which is obviously not economical and environmentally friendly, and not only wastes the cooling energy released by LNG , also wasted the heat in the cooling cylinder jacket water.

Contents of the invention

The purpose of the utility model is to address the defects and problems of the above-mentioned prior art, by rationally utilizing the cold energy released during the vaporization of LNG in the LNG-powered ship and the heat released when the LNG is burned, to provide a ship air-conditioning system to meet the cooling requirements of the ship cabin, Heating demand to reduce the energy consumption of the ship's air conditioning system and improve the economy and environmental protection of the ship's overall operation.

The utility model organically integrates a large amount of energy produced by LNG vaporization or combustion in LNG-powered ships with the cooling and heating of the ship's air-conditioning system, and utilizes the large amount of cold energy released during LNG vaporization as a cold source for the ship's air-conditioning system to meet the requirements of the ship's air-conditioning system. cold demand. A large amount of waste heat generated by LNG combustion is used as the heat source of the air-conditioning system to meet the heating demand of the ship's air-conditioning system. In order to achieve the optimization of energy utilization efficiency. The utility model adopts the cold storage method of ice storage air conditioner, and the ice storage utilizes the phase change latent heat of water to store the cooling capacity. In addition to the sensible heat with a certain temperature difference, the main use is the phase change between ice and water at 0°C. Latent heat, compared with water cold storage, the cold storage capacity of the ice storage air conditioner is increased by more than 10 times, and the volume of the cold storage tank can be reduced by about 80%. In this way, on the one hand, it meets the power and space requirements of the ship, reduces the pollution to the marine environment, and also reduces the vaporization cost of LNG, which plays a positive role in promoting the wide application of LNG-powered ships. On the other hand, it also solves the heating demand of the ship's air conditioner, and further improves the energy saving efficiency of the ship's air conditioner. It saves a huge amount of electric energy consumed by the air-conditioning system, and greatly improves the economy and environmental protection of the ship.

The utility model uses ice storage cooling air conditioner to solve the problem that the LNG vaporization amount does not match the cooling capacity required by the air conditioner, and the LNG vaporization time is not synchronized with the cooling time. When the cooling capacity required by the air conditioning system is small, the ice storage The tank stores the excess cold generated during LNG vaporization to ensure the amount of LNG vaporization required for the normal operation of the ship; the utility model also uses water heat storage to recover the waste heat released during LNG combustion to meet the heating demand of the ship's air conditioner. Realize the efficient utilization of energy for LNG-powered ships.

In order to achieve the above object, the utility model adopts the following technical solutions.

An air-conditioning refrigeration/heating system for an LNG-powered ship is composed of an LNG vaporization circuit, an ice cold storage circulation circuit, a heat recovery circuit and a seawater circuit. The LNG vaporization circuit is sequentially composed of an LNG liquid storage tank 1, a first electric control valve 2, an inlet b and an outlet a of the first heat exchanger 3, a second electric control valve 4, and a ship main engine power system 5 connected by pipes. ; The ice cold storage circulation loop is sequentially connected by the first heat exchanger 3 outlet c, the first refrigerant storage tank 6, the first refrigerant pump 7, the inlet f and the outlet e of the second heat exchanger 8, and the valve 9 is connected to the first The inlet d of a heat exchanger 3 constitutes the first refrigerant cycle; the outlet g of the second heat exchanger 8, the second refrigerant storage tank 10, the second refrigerant pump 11, and the first electric three-way valve 13 are arranged in the heat storage The refrigerant coil 19 in the device 18 and the second electric three-way valve 14 are connected to the inlet h of the second heat exchanger 8 through a pipe to form a second refrigerant cycle; The second refrigerant in the refrigerant coil 19 passes through the medium for heat exchange and then uses pipelines to connect with the cabin of the ship to form an ice cold storage cycle; The hot water coil 17 arranged in the cold storage and heat storage device 18 is formed by connecting pipes; the seawater circuit is sequentially composed of the first electric three-way valve 13, the inlet p and the outlet m of the third heat exchanger 12 and the third electric three-way valve. The through valve 14 is formed by pipe connection.

The above-mentioned cold and heat storage device 18 is also connected with several air-conditioning users. The third heat exchanger 12 is also provided with a seawater inlet o and a seawater outlet n.

The above-mentioned first refrigerant is a phase-change refrigerant. The phase change refrigerant is preferably any one of R134a or R404a.

The second refrigerant mentioned above is a non-phase-change refrigerant, such as brine solution or ethylene glycol solution. The non-phase-change refrigerant is preferably any one of brine solution or ethylene glycol solution.

The first refrigerant required in the utility model is to directly exchange heat with LNG, so the freezing point of the first refrigerant should not be too high, otherwise, the first refrigerant is likely to freeze and block the pipeline during the heat exchange process. In addition, in order to recover the cold energy of LNG as much as possible, the phase change refrigerant should be selected as the first refrigerant, such as R134a, R404a, and other refrigerants can also be selected according to the actual operating conditions.

The second refrigerant required in the utility model is mainly to receive the cold energy delivered by the first refrigerant, and exchange heat with the cold storage medium in the ice storage air conditioner in summer, store the cold energy in the ice water in the ice storage air conditioner, and directly Exchange heat with seawater. Therefore, the requirements for the second refrigerant are not very high, and non-phase-change refrigerants, such as saline solution or ethylene glycol aqueous solution, can be used.

LNG vaporization circuit: The natural gas output pipeline in the LNG liquid storage tank 1 passes through the first electric control valve 2, enters the first heat exchanger 3 through the inlet b of the first heat exchanger 3 to exchange heat with the first refrigerant, and then passes through the first heat exchanger 3 The outlet c of a heat exchanger 3 and the second electric control valve 4 enter the power system 5 of the main engine of the ship for combustion to provide power support for the operation of the ship.

Ice cold storage circulation circuit: the first refrigerant passes through the first refrigerant storage tank 6 and the first refrigerant pump 7 after the heat exchange temperature with LNG in the first heat exchanger is lowered, and then enters the second heat exchanger through the inlet f of the second heat exchanger 8 The heat exchanger 8 exchanges heat with the second refrigerant. After the temperature rises, the first refrigerant passes through the outlet g of the second heat exchanger 8 and the valve 9 and enters the first heat exchanger 3 from the inlet d of the first heat exchanger 3 to exchange with LNG. heat, complete the cycle of the first refrigerant. After the heat exchange temperature between the second refrigerant and the first refrigerant decreases in the second heat exchanger 8, it passes through the outlet e of the second heat exchanger 8, passes through the second refrigerant storage tank 10, the second refrigerant pump 11 and the first electric three-way valve 13 enters the refrigerant coil 19 installed in the cold storage and heat storage device 18, and after exchanging heat with the water in the cold water coil 20 installed in the cold and heat storage device 18, the temperature of the second refrigerant rises, and passes through the second electric three-way valve 14 returns to the second heat exchanger 8 from the inlet h of the second heat exchanger 8 to exchange heat with the first refrigerant to complete the cycle of the second refrigerant. The water in the cold water coil 20 installed in the cold storage and heat storage device 8 exchanges heat with the second refrigerant, absorbs the cooling capacity and freezes into ice, completes the storage of LNG cold energy and delivers the required cooling capacity to the cabin of the ship, and the load cooling in the air conditioning system The agent enters the cold storage and heat storage device 18 to take away the cold energy in the ice, and meets the cooling demand of the ship cabin through the air-conditioning heat exchange system. The ice in the cold and heat storage device melts into water, and then receives the cold energy transferred by the second refrigerant. Complete the ice storage cycle.

Heat recovery circuit: After the vaporized LNG enters the main engine power system 5 of the ship, it will generate a large amount of waste heat after burning and doing work. The cooling water of the main engine passes through the third electric control valve 15, the circulation pump 16 and the hot water coil 17 in the heat storage device 18 and The heat storage medium in the cold storage and heat storage device 18 returns to the main engine power system 5 after heat exchange and cooling, and the heat storage medium in the cold and heat storage device 18 exchanges heat with the water in the cold water coil 20 arranged therein. The heat of the heat storage medium in the cold storage and heat storage device 18 and the temperature of the water in the cold water coil 20 are sent to the cabin of the ship through the air conditioner terminal for heat exchange, so as to meet the heating demand of the cabin of the ship in winter.

Seawater circuit: when the cabin of the ship does not need cooling in winter, the temperature of the second refrigerant and the first refrigerant exchange heat in the second heat exchanger 8 and then the temperature drops through the outlet g of the second heat exchanger 8 to pass through the second refrigerant storage tank 10, The second refrigerant pump 11 enters the third heat exchanger 12 through the other outlet of the first electric three-way valve 13, and the seawater enters the third heat exchanger 12 from the inlet o to exchange heat with the second refrigerant, and the temperature of the seawater decreases from Exit n out. The second refrigerant whose temperature rises after exchanging heat with seawater flows out from the outlet m and returns to the second heat exchanger 8 through the second electric three-way valve 14 to complete the heat exchange between the second refrigerant and seawater. Although this circuit also discharges the seawater whose temperature has been lowered after heat exchange into the ocean, because the patented invention adopts the method of secondary refrigerant cooling, the temperature difference between the seawater and the second refrigerant is not large, so the cold energy carried in the seawater per unit flow is less. Compared with conventional LNG-powered ships, the LNG vaporization process has less damage to the marine environment, and is more economical and environmentally friendly.

The main function of the utility model is to organically integrate the LNG vaporization process with the cooling and heating demand of the ship's air-conditioning system, use the large amount of cold energy released during LNG vaporization as the cold source of the ship's air-conditioning system, and enter the vaporized LNG into the ship A large amount of waste heat generated by the combustion of the main engine power system is recovered to meet the winter heating demand of the air conditioner user end, so as to achieve the optimization of energy utilization efficiency. The utility model not only solves the problem that a large amount of cold energy is wasted and marine environment is polluted by directly exchanging heat with sea water when the LNG is vaporized when the conventional LNG-powered ship is running, but at the same time, through effective waste heat recovery, it solves the refrigeration/heating demand of the ship's air conditioner and breaks through the LNG The vaporization amount does not match the cold storage capacity of the air conditioner, and the technical bottleneck of LNG vaporization time and cooling time is not synchronized. A low energy consumption, low emission and high energy efficiency LNG powered ship air conditioning system is proposed.

Description of drawings

Fig. 1 is a structural schematic diagram of an air-conditioning refrigeration/heating system of an LNG powered ship according to the present invention.

In the figure: 1. LNG liquid storage tank, 2. The first electric control valve, 3. The first heat exchanger, 4. The second electric control valve, 5. The main engine power system of the ship, 6. The first refrigerant storage tank, 7 .First refrigerant pump, 8. Second heat exchanger, 9. Valve, 10. Second refrigerant storage tank, 11. Second refrigerant pump, 12. Third heat exchanger, 13. First electric three-way valve, 14. The second electric three-way valve, 15. The third electric control valve, 16. Circulation pump, 17. Hot water coil, 18. Cooling heat storage device, 19. Refrigerant coil, 20. Cold water coil.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail.

As shown in Figure 1, an air-conditioning refrigeration/heating system for an LNG-powered ship is composed of an LNG vaporization circuit, an ice storage circuit, a heat recovery circuit, and a seawater circuit. The LNG vaporization circuit is sequentially composed of an LNG liquid storage tank 1, a first electric control valve 2, an inlet b and an outlet a of the first heat exchanger 3, a second electric control valve 4, and a ship main engine power system 5 connected by pipes. ; The ice cold storage circulation circuit is sequentially connected by the outlet c of the first heat exchanger 3, the first refrigerant storage tank 6, the first refrigerant pump 7, the inlet f and the outlet e of the second heat exchanger 8, and the valve 9 through pipes The inlet d of the first heat exchanger 3 constitutes the first refrigerant cycle; the outlet g of the second heat exchanger 8, the second refrigerant storage tank 10, the second refrigerant pump 11, and the first electric three-way valve 13 are arranged in the cooling storage tank in turn. The refrigerant coil 19 in the heat device 18, the second electric three-way valve 14 is connected to the inlet h of the second heat exchanger 8 through a pipe to form a second refrigerant cycle; After exchanging heat with the second refrigerant in the refrigerant coil 19 through the medium, use pipelines to connect with the cabin of the ship to form an ice cold storage cycle; And the hot water coil 17 arranged in the cold storage and heat storage device 18 is formed by pipe connection; the seawater circuit is composed of the first electric three-way valve 13, the inlet p, the outlet m of the third heat exchanger 12 and the third electric three-way valve in turn. The three-way valve 14 is formed by pipe connection.

The above-mentioned cold and heat storage device 18 is also connected with several air-conditioning users. The third heat exchanger 12 is also provided with a seawater inlet o and a seawater outlet n.

The above-mentioned first refrigerant is a phase-change refrigerant. The phase change refrigerant is preferably any one of R134a or R404a.

The second refrigerant mentioned above is a non-phase-change refrigerant, such as brine solution or ethylene glycol solution. The non-phase-change refrigerant is preferably any one of brine solution or ethylene glycol solution.

work process:

LNG vaporization circuit: The natural gas output pipeline in the LNG liquid storage tank 1 passes through the first electric control valve 2, enters the first heat exchanger 3 through the inlet b of the first heat exchanger 3 to exchange heat with the first refrigerant, and then passes through the first heat exchanger 3 The outlet c of a heat exchanger 3 and the second electric control valve 4 enter the power system 5 of the main engine of the ship for combustion to provide power support for the operation of the ship.

Ice cold storage circulation loop: the first refrigerant passes through the first refrigerant storage tank 6 and the first refrigerant pump 7 after the heat exchange temperature with LNG in the first heat exchanger 3 is lowered, and then enters the second refrigerant through the inlet f of the second heat exchanger 8 The heat exchanger 8 exchanges heat with the second refrigerant. After the temperature rises, the first refrigerant enters the first heat exchanger 3 and LNG through the outlet g of the second heat exchanger 8 and the valve 9 from the inlet d of the first heat exchanger 3 . heat exchange to complete the circulation of the first refrigerant. After the heat exchange temperature between the second refrigerant and the first refrigerant decreases in the second heat exchanger 8, it passes through the outlet e of the second heat exchanger 8, passes through the second refrigerant storage tank 10, the second refrigerant pump 11 and the first electric three-way valve 13 enters the refrigerant coil 19 in the cold storage and heat storage device 18, and after exchanging heat with the water in the cold water coil 20 in the cold and heat storage device 18, the temperature of the second refrigerant rises. The inlet h of the heat exchanger 8 returns to the second heat exchanger 8 to exchange heat with the first refrigerant to complete the cycle of the second refrigerant. The water in the cold water coil 20 in the cold storage and heat storage device 8 exchanges heat with the second refrigerant, absorbs the cooling capacity and freezes into ice, completes the storage of LNG cold energy and delivers the required cooling capacity to the cabin of the ship, and the brine in the air conditioning system enters The cold heat storage device 18 takes away the cold energy in the ice cubes, and meets the cooling demand of the ship cabin through the air-conditioning heat exchange system. The ice in the cold heat storage device 18 melts into water, and then receives the cold energy transferred by the second refrigerant to complete Ice storage circulation loop.

Heat recovery circuit: After the vaporized LNG enters the main engine power system 5 of the ship, it will generate a large amount of waste heat after burning and doing work. The cooling water of the main engine passes through the third electric control valve 15, the circulation pump 16 and the hot water coil 17 in the heat storage device 18 and The heat storage medium in the cold storage and heat storage device 18 returns to the main engine power system 5 after heat exchange and cooling, and the heat storage medium in the cold and heat storage device 18 exchanges heat with the water in the cold water coil 20 arranged therein. The heat of the heat storage medium in the cold storage and heat storage device 18 and the temperature of the water in the cold water coil 20 are sent to the cabin of the ship through the air conditioner terminal for heat exchange, so as to meet the heating demand of the cabin of the ship in winter.

Seawater circuit: when the cabin of the ship does not need to be cooled in winter, the second refrigerant and the first refrigerant exchange heat in the second heat exchanger 8, and then the temperature drops through the outlet g of the second heat exchanger 8, passing through the second refrigerant storage tank 10 and The second refrigerant pump 11 enters the third heat exchanger 12 through the other outlet of the first electric three-way valve 13, and the seawater enters the third heat exchanger 12 from the inlet o to exchange heat with the second refrigerant, and the temperature of the seawater decreases from Exit n out. The second refrigerant whose temperature rises after exchanging heat with seawater flows out from the outlet m and returns to the second heat exchanger 8 through the second electric three-way valve 14 to complete the heat exchange between the second refrigerant and seawater. Although this circuit also discharges the seawater whose temperature has been lowered after heat exchange into the ocean, since the utility model patent adopts the cooling method of the secondary refrigerant, the temperature difference between the seawater and the second refrigerant is not large, so the cooling energy carried in the seawater per unit flow is less Compared with the LNG vaporization process in conventional LNG-powered ships, the damage to the marine environment is smaller, and it is more economical and environmentally friendly.

In addition to the above-mentioned embodiments, the utility model can also have other implementation methods, and all technical solutions formed by equivalent replacement or equivalent transformation all fall within the protection scope of the utility model claims.

Claims (7)

1. LNG Power Vessel air conditioner refrigerating/heating system, is characterized in that: comprise LNG vaporization loop, ice conserve cold closed circuit, heat recovery circuit and sea return; Described LNG vaporizes loop successively by LNG fluid reservoir (1), the first electrically-controlled valve (2), the import b of First Heat Exchanger (3), outlet a, second electrically-controlled valve (4), marine main engine dynamical system (5) is connected and composed by pipe; Described ice conserve cold closed circuit, successively by the outlet c of First Heat Exchanger (3), first refrigerant holding vessel (6), first refrigerant pump (7), the import f of the second heat exchanger (8), outlet e, valve (9) connects First Heat Exchanger (3) import d by pipe and forms the first refrigerant circulation; G is exported successively by the second heat exchanger (8), second refrigerant holding vessel (10), second refrigerant pump (11), first electric T-shaped valve (13), be arranged on the refrigerant coil pipe (19) in cold-storage and thermal storage device (18), the second electric T-shaped valve (14) connects the second heat exchanger (8) import h by pipe and forms the second refrigerant circulation; Be arranged on the water in the chilled water coil (20) in cold-storage and thermal storage device (18) and the second refrigerant in refrigerant coil pipe (19) connects and composes ice conserve cold closed circuit by utilizing pipeline and ship's space after media for heat exchange; Described heat recovery circuit is successively by marine main engine dynamical system (5), 3rd electrically-controlled valve (15), circulating pump (16) and the hot-water coil pipe (17) be arranged in cold-storage and thermal storage device (18) are connected and composed by pipe; Described sea return is successively by the first electric T-shaped valve (13), and import p, the outlet m of the 3rd heat exchanger (12) and the 3rd electric T-shaped valve (14) are connected and composed by pipe.

2. LNG Power Vessel air conditioner refrigerating/heating system according to claim 1, is characterized in that: described cold-storage and thermal storage device (18) is also connected with some air conditioner users.

3. LNG Power Vessel air conditioner refrigerating/heating system according to claim 1, is characterized in that: the 3rd described heat exchanger (12) is also provided with sea intake o and seawer outlet n.

4. LNG Power Vessel air conditioner refrigerating/heating system according to claim 1, is characterized in that: the first described refrigerant is phase transformation refrigerant.

5. LNG Power Vessel air conditioner refrigerating/heating system according to claim 4, is characterized in that: described phase transformation refrigerant is preferably any one in R134a or R404a.

6. LNG Power Vessel air conditioner refrigerating/heating system according to claim 1, is characterized in that: the second described refrigerant is without phase transformation refrigerant, as saline solution or glycol water.

7. LNG Power Vessel air conditioner refrigerating/heating system according to claim 6, is characterized in that: described without phase transformation refrigerant be preferably in saline solution or glycol water any one.