Absorption refrigeration system driven by coupling of solar energy and fuel cell

Abstract

An absorption refrigeration system driven by coupling of solar energy and a fuel cell comprises an absorber, a third pump, a second heat exchanger, a first heat exchanger, a generator, a condenser, a throttling valve, an evaporator, a solar heat collector, a hot water tank and the fuel cell. An absorbent outlet of the absorber, the third pump, a first opening of the second heat exchanger, a first opening of the first heat exchanger, the generator and the absorber are connected to form an absorbent circulation loop; a refrigerant outlet of the generator, the condenser, the throttle valve and the evaporator are connected to form a cooling circulation loop; the hot water tank is connected with the first heat exchanger through a first port to form a heating circulation loop, connected with the solar heat collector through a second port, connected with a cooling system of the fuel cell through a third port to form a circulation loop and connected with a user side through a fifth port. Waste heat generated in the running process of the fuel cell is used for assisting the solar heat collector to heat water, heat is supplied to users, a refrigerating system is driven to run, the requirement of the users for cold and heat is met, and energy conservation and environment protection are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to absorption refrigeration system technical field especially relates to a solar energy and fuel cell coupling driven absorption refrigeration system. BACKGROUND

[0002] Absorption refrigeration system is a kind of high-efficiency energy-saving equipment using heat energy as driving force, and heat is transferred by absorbing and releasing refrigerant. Unlike traditional compression heat pumps, absorption heat pumps do not use motor-driven compressors, but use solar energy, waste heat and other heat sources as energy sources, which makes it more energy-efficient and environmentally friendly in specific application scenarios.

[0003] Solar energy is a clean and renewable energy source that can generate heat energy through solar radiation. Using a solar collector can effectively utilize light energy to heat water, thereby providing a driving heat source for the absorption refrigeration system. This reduces the use of fossil fuels, reduces energy consumption and reduces the emission of carbon, nitrogen and sulfur-containing pollutants, thereby achieving energy conservation, environmental protection and carbon emission reduction.

[0004] However, the efficiency of the solar collector is often affected by weather conditions, and the efficiency will decrease significantly on cloudy days or at night. How to solve the problem of effectively utilizing solar energy to drive the absorption refrigeration system under poor lighting conditions is the current problem. INVENTION CONTENTS

[0005] To solve the problems and deficiencies in the above background art, the utility model provides an absorption refrigeration system driven by solar energy and fuel cell coupling.

[0006] The technical scheme of the utility model is as follows:

[0007] An absorption refrigeration system driven by solar energy and fuel cell coupling includes an absorber, a third pump, a second heat exchanger, a first heat exchanger, a generator, a condenser, a throttling valve, an evaporator, a solar collector, a hot water tank and a fuel cell.

[0008] The absorber outlet is connected to the inlet of the third pump, the outlet of the third pump is connected to the first inlet of the second heat exchanger, the first outlet of the second heat exchanger is connected to the first inlet of the first heat exchanger, the first outlet of the first heat exchanger is connected to the absorber inlet of the generator, and the absorber outlet of the generator is connected to the absorber inlet. Thus, the absorber, the third pump, the second heat exchanger, the first heat exchanger and the generator are connected in sequence to form a closed loop of the absorber circulation loop, for heating the absorber to make the generator produce refrigerant vapor. In specific implementation, the absorber can use lithium bromide solution, and the third pump can use axial flow pump.

[0009] The refrigerant outlet of the generator is connected with the inlet of the condenser, the outlet of the condenser is connected with the inlet of the throttling valve, the outlet of the throttling valve is connected with the inlet of the evaporator, the refrigerant outlet of the evaporator is connected with the refrigerant inlet of the absorber, and the chilled water outlet of the evaporator is connected with the user terminal refrigerator to form a cooling circulation loop.

[0010] Meanwhile, the chilled water outlet of the evaporator is connected with the user terminal refrigerator to form a cooling circulation loop.

[0011] The first port of the hot water tank is connected with the first heat exchanger to form a heating circulation loop, the second port is connected with the solar collector, the third port is connected with the cooling system of the fuel cell to form a circulation loop, and the fifth port is connected with the user terminal.

[0012] The first port of the hot water tank is connected with the first heat exchanger to form a heating circulation loop, the second port is connected with the solar collector, the third port is connected with the cooling system of the fuel cell to form a circulation loop, and the fifth port is connected with the user terminal.

[0013] The solar collector is connected with the second port of the hot water tank and is used for heating water in the hot water tank.

[0014] The liquid cooling loop of the fuel cell is connected with the third port of the hot water tank to form a heating circulation loop, and the waste heat of the fuel cell is used for heating the hot water tank.

[0015] In addition, the hot water tank can directly supply heat to the user through the fifth port.

[0016] The beneficial effects of the present application are as follows:

[0017] 1. The utility model discloses a waste heat of fuel cell generates auxiliary solar collector to heat water tank, can effectively benefit the waste heat of fuel cell operation process, heats the water tank to provide stable and economic heat source for the user. Help to improve the overall efficiency of system, and can reduce energy waste. In addition, the system operation does not need the consumption of fossil fuel, can realize zero carbon emission.

[0018] 2. The waste heat generated during the operation of the fuel cell is used to heat water, which makes up for the insufficient stable heat provided by the solar collector when the sunlight is insufficient, and meets the user's demand for heat and cold heat. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The structure diagram of the embodiment of the utility model;

[0020] 1. Absorber; 2, third pump; 3, second heat exchanger; 4, first heat exchanger; 5, generator; 6, condenser; 7, throttle valve; 8, evaporator; 9, second pump; 10, stop valve; 11, hot water tank; 12, first pump; 13, solar collector; 14, water replenishing valve; 15, water replenishing tank; 16, fuel cell, 17, user end. DETAILED DESCRIPTION

[0021] The technical scheme in the embodiment of the utility model will be described clearly and completely in combination with the drawings in the embodiment of the utility model.

[0022] Embodiment one

[0023] As shown in Figure 1 A solar and fuel cell coupled driven absorption refrigeration system, comprising absorber 1, third pump 2, second heat exchanger 3, first heat exchanger 4, generator 5, condenser 6, throttle valve 7, evaporator 8, second pump 9, stop valve 10, hot water tank 11, first pump 12, solar collector 13, water replenishing valve 14, water replenishing tank 15, fuel cell 16.

[0024] The absorber 1 is connected with the inlet of the third pump 2, the outlet of the third pump 2 is connected with the first inlet of the second heat exchanger 3, the first outlet of the second heat exchanger 3 is connected with the first inlet of the first heat exchanger 4, the first outlet of the first heat exchanger 4 is connected with the absorber inlet of the generator 5, and the absorber outlet of the generator 5 is connected with the absorber inlet of the absorber 1. Thus, the absorber 1, the third pump 2, the second heat exchanger 3, the first heat exchanger 4 and the generator 5 are connected in sequence to form a closed loop of the absorber circulation loop, for heating the absorber, so that the generator 5 can generate refrigerant steam. The absorber can adopt lithium bromide solution, and the third pump 2 adopts an axial flow pump in an embodiment.

[0025] The refrigerant outlet of the generator 5 is connected with the inlet of the condenser 6, the outlet of the condenser 6 is connected with the inlet of the throttling valve 7, the outlet of the throttling valve 7 is connected with the inlet of the evaporator 8, and the refrigerant outlet of the evaporator 8 is connected with the refrigerant inlet of the absorber 1, so that the generator 5, the condenser 6, the evaporator 8 and the absorber 1 are connected in sequence to form a refrigeration cycle circuit.

[0026] The chilled water outlet of the evaporator 8 is connected with the inlet of the user terminal 17 chiller to form a cooling cycle circuit. Specifically, the chilled water outlet of the evaporator 8 is connected with the inlet of the user terminal 17 chiller, the outlet of the user terminal 17 chiller is connected with the inlet of the second pump 9, and the outlet of the second pump 9 is connected with the chilled water return outlet of the evaporator 8 through the stop valve 10. When the system is working, the chilled water exchanges heat with the refrigerant in the evaporator 8, and is pumped by the second pump 9 after the temperature is reduced to deliver cold energy to the user terminal 17, absorbs heat of the user terminal 17, and is returned to the evaporator 8 through the stop valve 10 to exchange heat again, thereby continuously generating cold energy. In an embodiment, the second pump 9 is a centrifugal pump.

[0027] The hot water tank 11 is connected with the second port of the first heat exchanger 4 to heat the first heat exchanger 4. Specifically, the hot water tank 11 is connected with the first heat exchanger 4 through the first port to form a heating cycle circuit. Further, the first port of the hot water tank 11 and the first heat exchanger 4 are connected with the first pump 12, which is a centrifugal pump, to drive the hot water in the hot water tank 11 to circulate through the first heat exchanger 4, thereby continuously heating the first heat exchanger 4. The first heat exchanger 4 is connected with the generator 5 to heat the absorbent, thereby driving the generator 5 to work, and further driving the absorption refrigeration system to work.

[0028] The solar collector 13 is connected with the second port of the hot water tank 11 to heat the water in the hot water tank 11. The cooling system of the fuel cell 16 is connected with the third port of the hot water tank 11 to form a heating cycle circuit, and the waste heat of the fuel cell 16 is used to heat the hot water tank 11, thereby heating the hot water tank 11 by the waste heat of the fuel cell 16 when the solar collector 13 cannot reach the set heating condition.

[0029] The hot water tank 11 further has a fourth port connected with the water supplement tank 15, and the water supplement tank is used to supplement water to the hot water tank 11. Further, the water supplement tank 15 and the hot water tank 11 are connected with the water supplement valve 14, and the water supplement valve 14 is controlled to supplement water to the hot water tank 11.

[0030] The hot water tank 11 further has a fifth port connected with the user terminal 17 to directly supply heat to the user terminal 17.

[0031] Working principle of the system:

[0032] When the light condition is sufficient, the heat is collected by the solar collector 13 to heat the hot water tank 11, the direct heat supply to the user end 17 is realized, the water in the hot water tank 11 is circulated to heat the first heat exchanger 4 by the first pump 12, thereby driving the absorption refrigeration system to operate, and the cold supply to the user end 17 is realized.

[0033] The operation process of the absorption refrigeration system is as follows: the lithium bromide dilute solution in the absorber 1 is sequentially heat-exchanged with the opposite lithium bromide concentrated solution through the second heat exchanger 3 and with the opposite heat source water through the first heat exchanger 4 by the third pump 2, and then enters the generator 5 after temperature rising, in the generator 5, the lithium bromide dilute solution is heated, the water solution is evaporated, so that the lithium bromide dilute solution becomes a concentrated solution, and the concentrated solution returns to the absorber 1 through the second heat exchanger 3. Because the temperature and pressure of the refrigerant in the generator 5 are increased, the high-temperature and high-pressure refrigerant vapor enters the condenser 6, is condensed into a medium-temperature and high-pressure refrigerant liquid, is throttled and reduced in pressure through the throttling valve 7, enters the evaporator 8, and the low-temperature and low-pressure refrigerant vapor enters the absorber 1 to mix with the lithium bromide concentrated solution to form the lithium bromide dilute solution, and the next cycle is performed.

[0034] The chilled water is heat-exchanged with the refrigerant in the evaporator 8, is sent to the user end 17 to deliver cold after temperature reduction, is pumped by the second pump 9 after absorbing the heat of the user end 17, returns to the evaporator 8 through the stop valve 10 to be heat-exchanged again, thereby producing continuous cold supply.

[0035] When the light condition is insufficient, the heat collected by the solar collector 13 is insufficient to drive the absorption refrigeration system, and then the waste heat generated by the fuel cell 16 is used to assist in heating the hot water tank 11, the direct heat supply to the user end 17 is realized, the water in the hot water tank 11 is circulated to heat the first heat exchanger 4 by the first pump 12, thereby driving the absorption refrigeration system to operate, and the cold supply to the user end 17 is realized. The operation process of the absorption refrigeration system is the same as that when the light condition is sufficient, and is not described herein again.

[0036] The above is the preferred embodiment of the utility model, but the utility model is not limited to the above-mentioned embodiments and examples, various changes, equivalent replacements, improvements and the like made within the knowledge range of the person skilled in the art without departing from the concept of the present application should be included in the protection range of the utility model.

Claims

1. A solar energy and fuel cell coupled driven absorption refrigeration system, characterized in that, The system comprises an absorber (1), a third pump (2), a second heat exchanger (3), a first heat exchanger (4), a generator (5), a condenser (6), a throttle valve (7), an evaporator (8), a hot water tank (11), a solar collector (13) and a fuel cell (16); The absorber (1) is connected with the third pump (2) at the absorber outlet, the third pump (2) is connected with the second heat exchanger (3) at the outlet, the second heat exchanger (3) is connected with the first heat exchanger (4) at the first outlet, the first heat exchanger (4) is connected with the generator (5) at the first outlet, and the generator (5) is connected with the absorber (1) at the absorber inlet; The generator (5) is connected with the condenser (6) at the refrigerant outlet, the condenser (6) is connected with the throttle valve (7) at the inlet, the throttle valve (7) is connected with the evaporator (8) at the outlet, the evaporator (8) is connected with the absorber (1) at the refrigerant inlet, and the evaporator (8) is connected with the user end (17) at the chilled water outlet to form a cooling circulation loop. The hot water tank (11) is connected with the first heat exchanger (4) at the first port to form a heating circulation loop, connected with the solar collector (13) at the second port, connected with the cooling system of the fuel cell (16) at the third port to form a circulation loop, and connected with the user end (17) at the fifth port.

2. The solar energy and fuel cell coupled driven absorption refrigeration system according to claim 1, wherein, The evaporator (8) is further connected with the second pump (9) and the stop valve (10) on the return water pipeline of the user end (17), the chilled water outlet of the evaporator (8) is connected with the inlet of the user end (17), the outlet of the user end (17) is connected with the inlet of the second pump (9), and the outlet of the second pump (9) is connected with the chilled water return inlet of the evaporator (8) through the stop valve (10).

3. The solar energy and fuel cell coupled driven absorption refrigeration system according to claim 2, wherein, The first port of the hot water tank (11) is connected with the first heat exchanger (4) through the first pump (12).

4. The solar energy and fuel cell coupled driven absorption refrigeration system according to claim 3, wherein, A water supplement tank (15) is further connected with the fourth port of the hot water tank (11) to supplement water into the hot water tank (11).

5. The solar energy and fuel cell coupled driven absorption refrigeration system according to claim 4, wherein, The water supplement tank (15) is connected with the hot water tank (11) through the water supplement valve (14).

6. The solar energy and fuel cell coupled driven absorption refrigeration system of claim 1, wherein, The third pump (2) is a centrifugal pump.

7. The solar energy and fuel cell coupled driven absorption refrigeration system of claim 3, wherein, The first pump (12) and the second pump (9) are centrifugal pumps.

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