Combined heat and power system

Abstract

The utility model belongs to the field of fuel cells, and discloses a cogeneration system. Comprising a deionized water system, PEM hydrogen production equipment, a hydrogen storage system and a fuel cell system which are sequentially connected, the PEM hydrogen production equipment is further connected with a heat exchanger a, the fuel cell system is further connected with a heat exchanger b, the heat exchanger a is further circularly connected with a tap water tank, the heat exchanger b is circularly connected with a heating water tank, and the heating water tank is further circularly connected with a geothermal system. And the nitrogen system is respectively connected with the PEM hydrogen production equipment, the hydrogen storage system and the fuel cell system. According to the invention, heat energy generated by PEM electrolyzed water is fully utilized, heat energy and electric energy generated by the fuel cell system are fully utilized, and the efficiency of the fuel cell system is improved from 52% to 70%.

Description

TECHNICAL FIELD

[0001] The utility model belongs to fuel cell field, concretely relates to a kind of heat and power cogeneration system based on fuel cell system and PEM electrolytic water. BACKGROUND

[0002] PEM electrolytic water system can produce high-purity, low-dew-point hydrogen, and the hydrogen is stored in a hydrogen buffer tank for hydrogen supply of the fuel cell system.

[0003] As known, fuel cell generates a lot of heat in the process of power generation, and this part of heat belongs to energy loss in the process of fuel cell power generation, which reduces the power generation efficiency of fuel cell, and in order to reduce the temperature in the process of fuel cell operation, water cooling or air cooling system is also needed, which greatly increases the energy consumption of the system. UTILITY MODEL CONTENTS

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a heat and power cogeneration system, which is used for energy collection, heating of a room and heating of tap water; the generated electric energy can be connected to the grid for system power consumption and household power consumption, or the electric energy can be stored by using a storage battery; the energy consumption is greatly reduced, and the utilization rate of the whole system is increased.

[0005] The above object of the utility model is realized by the following technical scheme: a heat and power cogeneration system, comprising:

[0006] The deionized water system, PEM hydrogen production equipment, hydrogen storage system and fuel cell system are sequentially connected, the PEM hydrogen production equipment is further connected with a heat exchanger a, the fuel cell system is further connected with a heat exchanger b, the heat exchanger a is further connected with a tap water tank in circulation, the heat exchanger b is connected with a heating water tank in circulation, the heating water tank is further connected with a geothermal system in circulation, and the nitrogen system is connected with the PEM hydrogen production equipment, hydrogen storage system and fuel cell system respectively.

[0007] Further, the deionized water system, PEM hydrogen production equipment and fuel cell system are all connected with a 380V power supply, the fuel cell system is externally connected with a DC / DC inverter, the DC / DC inverter is further connected with a storage battery and a DC / AC inverter, the DC / AC inverter is externally connected with a transformer, and the PEM hydrogen production equipment is further connected with a DC power supply.

[0008] Further, the deionized water system is provided with a tap water inlet line, a filter a and a hand valve a are sequentially arranged on the line, a tap water tank is connected between the filter a and the hand valve a and is provided with an electric ball valve a.

[0009] Further, a hand valve b is arranged between the deionized water system and the PEM hydrogen production equipment, a hand valve c is arranged between the PEM hydrogen production equipment and the hydrogen storage system, and a hand valve d is arranged between the hydrogen storage system and the fuel cell system.

[0010] Further, the PEM hydrogen production device is provided with a thermometer a and a water electrolysis air cooling system, the PEM hydrogen production device is circularly connected with a heat exchanger a, and an electric three-way valve is arranged on the circular connection line.

[0011] Further, the fuel cell system is provided with a thermometer b and an engine air cooling system, the fuel cell system is circularly connected with a heat exchanger b, and an electric three-way valve is arranged on the circular connection line.

[0012] Further, the circular connection line between the tap water tank and the heat exchanger a is sequentially provided with the tap water tank, a circulating pump a, a hand valve e, a turbine flowmeter a, a thermometer c, the heat exchanger a and a thermometer d, a branch is arranged between the tap water tank and the circulating pump a to serve as a hot water outlet, and an electric ball valve b is further arranged on the branch.

[0013] Further, the circular connection line between the heat exchanger b and the heating water tank is sequentially provided with the heat exchanger b, a thermometer e, a control valve a, the heating water tank, a circulating pump b, a hand valve f, a turbine flowmeter b and a thermometer f, the circular connection line between the heating water tank and the geothermal system is sequentially provided with the heating water tank, a circulating pump c, a hand valve g, a thermometer g, the geothermal system, a thermometer h, a control valve b and a turbine flowmeter c, the control valve is further connected with a thermometer i, and the heating water tank is further provided with a refrigerant inlet line, and the refrigerant inlet line is sequentially provided with an electric ball valve c and a filter b.

[0014] The beneficial effects of the present application compared with the prior art are as follows:

[0015] 1. The present application fully utilizes the heat energy generated by PEM water electrolysis.

[0016] 2. The present application fully utilizes the heat energy generated by the fuel cell system.

[0017] 3. The present application fully utilizes the electric energy generated by the fuel cell system.

[0018] 4. The efficiency of the fuel cell system is increased from 52% to 70%. BRIEF DESCRIPTION OF DRAWINGS

[0019] The present application will be further described below in combination with the drawings and specific embodiments

[0020] Figure 1 is a structural schematic view of the combined heat and power system of the present application.

[0021] 1. Filter a; 2. Hand valve a; 3. Deionized water system; 4. Hand valve b; 5. PEM hydrogen production device; 6. Hand valve c; 7. Hydrogen storage system; 8. Hand valve d; 9. Fuel cell system; 10. Electric ball valve a; 11. Tap water tank; 12. Circulating pump a; 13. Hand valve e; 14. Turbine flowmeter a; 15. Heat exchanger a; 16. Thermometer c; 17. Thermometer d; 18. Thermometer a; 19. Electrolytic water air cooling system; 20. Electric three-way valve a; 21. Electric three-way valve b; 22. Electric ball valve b; 23. Filter b; 24. Electric ball valve c; 25. Heating water tank; 26. Circulating pump b; 27. Hand valve f; 28. Turbine flowmeter b; 29. Thermometer f; 30. Thermometer e; 31. Thermometer b; 32. Heat exchanger b; 33. Engine air cooling system; 34. Electric three-way ball valve c; 35. Electric three-way ball valve d; 36. Control valve a; 37. Circulating pump c; 38. Hand valve g; 39. Thermometer g; 40. Thermometer i; 41. Thermometer h; 42. Control valve b; 43. Turbine flowmeter c; 44. Geothermal system; 45. Nitrogen system; 46. DC / DC inverter; 47. Battery; 48. DC / AC inverter; 49. Transformer; 50. Household electricity; 51. DC power supply; 52. Other electricity. DETAILED DESCRIPTION

[0022] The utility model will be described in detail below through specific embodiments, but it does not limit the protection scope of the utility model. Unless otherwise specified, the experimental method used in the utility model is a conventional method, and the experimental equipment, materials, reagents, etc. used can be obtained from commercial channels.

[0023] Example 1

[0024] The structure of the present application will be further described below with reference to the accompanying drawings.

[0025] Tap water enters the deionized water system (3) through the filter a (1) and the hand valve a (2); after being treated as deionized water, the tap water passes through the hand valve b (4) to supply water to the PEM hydrogen production device (5), and the clean hydrogen gas treated by drying passes through the hand valve c (6) to enter the hydrogen storage system (7); the hydrogen gas is supplied to the fuel cell system (9) through the hand valve d (8).

[0026] Tap water through filter a (1), electric ball valve a10 to the tap water tank (11), tap water through circulating pump a (12), hand valve e (13), turbine flow meter a (14) through heat exchanger a (15), heat exchanger a15 inlet and outlet temperature of thermometer c (16), thermometer d (17), and then back to the tap water tank (11); the other side of the heat exchanger a (15) is the hot water of the PEM electrolytic water device (5), under normal circumstances, the heat of the PEM water electrolysis system is kept in communication with the heat exchanger a (15) through the electric three-way valve a (20), electric three-way valve b (21), and isolated from the electrolytic water air cooling system (19); if the electrolytic cell thermometer a (18) reaches the alarm value (set according to the requirements of the electrolytic cell manufacturer), it needs to be switched to the electrolytic water air cooling system (19) through the electric three-way valve a (20), electric three-way valve b (21) to communicate, and isolated from the heat exchanger a (15). The heated tap water is supplied to the room through electric ball valve b (22) for bathing, washing vegetables and other life.

[0027] Heating uses refrigerant, which is supplied to the heating water tank (25) through filter b (23), electric ball valve c (24), and the heating water tank is supplied to the heating water tank (25) through circulating pump b (26), hand valve f (27), turbine flow meter b (28) through heat exchanger b (32), the inlet and outlet temperature of heat exchanger b (32) is displayed on thermometer f (29), thermometer e (30), and then returned to the heating water tank (25) through control valve a (36); the other side of the heat exchanger b (32) is the hot water of the fuel cell system (9), under normal circumstances, the fuel cell system (9) keeps in communication with the heat exchanger b (32) through the electric three-way valve c (34), electric three-way valve d (35), and isolated from the engine air cooling system (33); if the engine inlet thermometer b (31) reaches the alarm value (set to 50℃), it needs to be switched to the fuel cell air cooling system (9) through the electric three-way valve c (34), electric three-way valve d (35) to communicate, and isolated from the heat exchanger b (32). The heated coolant is supplied to the geothermal system (44) for indoor heating through circulating pump c (37), hand valve g (38), and the inlet and outlet temperature of the geothermal system (44) is displayed on thermometer g (39), thermometer h (41). The indoor temperature is displayed on thermometer i (40), which is controlled through control valve b (42), and turbine flow meter c (43) is also provided on the circulating loop.

[0028] The direct current generated by the fuel cell system (9) is stabilized through the DC / DC inverter (46), and is supplied to the storage battery (47) for energy storage and DC / AC inverter (48) for grid connection, and then to the deionized water system (3), PEM hydrogen production device (5), fuel cell system (9), PEM electrolytic water direct current power supply (51) and other power consumption. The grid-connected power is provided to the resident power (50) through the transformer (49). Nitrogen system (45) is also provided for purging and replacing each system.

[0029] The above-mentioned embodiments are only the preferred embodiments of the present application, and are not all the embodiments that can be implemented by the present application. Any obvious modification made by those skilled in the art without departing from the principles and spirit of the present application should be considered to be included in the protection scope of the claims of the present application.

Claims

1. A cogeneration system, characterized by, It comprises: Deionized water system (3), PEM hydrogen production equipment (5), hydrogen storage system (7), fuel cell system (9) are connected in turn, wherein the PEM hydrogen production equipment (5) is also connected with heat exchanger a (15), the fuel cell system (9) is also connected with heat exchanger b (32), the heat exchanger a (15) is also connected with the circulating water tank (11), the heat exchanger b (32) is connected with the circulating water tank (25), the circulating water tank (25) is also connected with the ground heat system (44), the nitrogen system (45) is connected with the PEM hydrogen production equipment (5), the hydrogen storage system (7) and the fuel cell system (9) respectively.

2. The cogeneration system of claim 1, wherein, The deionized water system (3), PEM hydrogen production equipment (5), fuel cell system (9) are connected with 380V power supply, the fuel cell system (9) is connected with DC / DC inverter (46), the DC / DC inverter (46) is also connected with battery (47), DC / AC inverter (48), the DC / AC inverter (48) is connected with transformer (49), the PEM hydrogen production equipment (5) is also connected with DC power supply (51).

3. The combined heat and power system of claim 1, wherein, The deionized water system (3) is provided with tap water inlet line, which is provided with filter a (1) and hand valve a (2) in turn, the circulating water tank (11) is connected between the filter a (1) and the hand valve a (2) and is provided with electric ball valve a (10).

4. The combined heat and power system of claim 1, wherein, The deionized water system (3) and the PEM hydrogen production equipment (5) are provided with hand valve b (4), the PEM hydrogen production equipment (5) and the hydrogen storage system (7) are provided with hand valve c (6), the hydrogen storage system (7) and the fuel cell system (9) are provided with hand valve d (8).

5. The combined heat and power system of claim 1, wherein, The PEM hydrogen production equipment (5) is provided with thermometer a (18) and electrolytic water air cooling system (19), the PEM hydrogen production equipment (5) is connected with the heat exchanger a (15) in circulation, and the circulation connection line is provided with electric three-way valve a (20).

6. The combined heat and power system of claim 1, wherein, The fuel cell system (9) is provided with thermometer b (31) and engine air cooling system (33), the fuel cell system (9) is connected with the heat exchanger b (32) in circulation, and the circulation connection line is provided with electric three-way valve b (21).

7. The combined heat and power system of claim 1, wherein, The circulation connection line between the circulating water tank (11) and the heat exchanger a (15) is provided with circulating water tank (11), circulating pump a (12), hand valve e (13), turbine flow meter a (14), thermometer c (16), heat exchanger a (15) and thermometer d (17) in turn, one branch between the circulating water tank (11) and the circulating pump a (12) is the heating water outlet, and the branch is also provided with electric ball valve b (22).

8. The combined heat and power system of claim 1, wherein, The heat exchanger b (32) and the heating water tank (25) are connected in sequence by circulation connection line: heat exchanger b (32), thermometer e (30), control valve a (36), heating water tank (25), circulating pump b (26), hand valve f (27), turbine flow meter b (28), thermometer f (29); the heating water tank (25) and the geothermal system (44) are connected in sequence by circulation connection line: heating water tank (25), circulating pump c (37), hand valve g (38), thermometer g (39), geothermal system (44), thermometer h (41), control valve b (42), turbine flow meter c (43), the control valve a (36) is also connected with thermometer i (40); the heating water tank (25) is also provided with a refrigerant inlet line, and the refrigerant inlet line is provided with an electric ball valve c (24) and a filter b (23) in sequence.

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