CN213845337U

CN213845337U - Fuel cell device with energy recovery system

Info

Publication number: CN213845337U
Application number: CN202022613197.XU
Authority: CN
Inventors: 顾茸蕾; 王燕青
Original assignee: Hedwell Taicang Energy Technology Co ltd
Current assignee: Hedwell Taicang Energy Technology Co ltd
Priority date: 2020-11-12
Filing date: 2020-11-12
Publication date: 2021-07-30
Anticipated expiration: 2030-11-12

Abstract

The utility model provides a fuel cell device with energy recovery system, including fuel cell reactor and air compression subassembly, the fuel cell reactor includes fuel cell compressed air inlet, fuel cell gas vent, power battery and turbine, the gas outlet of air compression subassembly with fuel cell compressed air inlet connects, the air compression subassembly is set up to produce compressed air as the reaction raw materials of fuel cell reactor, the power output mouth of fuel cell reactor with power battery's power input mouth is connected, power battery's power output mouth with the power input mouth of air compression subassembly is connected, the air inlet of turbine with the fuel cell gas vent is connected, the turbine is set up to drive the generator electricity generation. The utility model discloses can retrieve the energy that the compressed air through fuel cell reactor carried, improve fuel cell's generating efficiency.

Description

Fuel cell device with energy recovery system

Technical Field

The utility model belongs to the new forms of energy field especially relates to a fuel cell device with energy recuperation system.

Background

The fuel cell system is a high-efficiency clean new energy power system. The raw materials required for the fuel cell reaction are hydrogen and oxygen, and hydrogen and air are used in actual operation. Air is compressed by an air compressor and then is sent to the cathode of the fuel cell, the air and the hydrogen at the anode carry out chemical reaction, the generated products are electric energy and water, partial heat is discharged to the atmosphere along with redundant air, and except that no other products polluting the environment exist, the fuel cell is very clean and environment-friendly, and at present, all countries greatly promote the development and popularization of a hydrogen fuel cell power system.

An air compressor dedicated to a fuel cell is a vital component of a hydrogen fuel cell power system, and is used for providing a certain pressure and a certain flow of compressed air for a cathode of the fuel cell so as to meet the requirement of oxygen in a fuel cell reaction process. At present, the fuel cell air compressor has single-stage compression and two-stage compression. The single-stage compression is that a motor drives a pinch roller, and the two-stage compression is that a motor drives two pinch rollers, and one is the low pressure level, and another is the high-pressure level, and high-pressure level and low-pressure level are the series connection, and the air reentries the high-pressure level after the low pressure level compression and carries out the second compression, so the air pressure and the flow that two-stage compressor obtained are higher than single-stage compressor, and the fuel cell power range of applicable is bigger.

In the prior art, in order to obtain higher power of the fuel cell, a multi-stage air compressor is more preferably adopted. The higher pressure and flow rate of air, in addition to the chemical reaction of oxygen with hydrogen in the air as it flows through the fuel cell, maintains the higher flow rate and pressure of the reacted exhaust. These high flow rates of exhaust gas, if discharged directly to the atmosphere, carry with it energy that is wasted.

Therefore, it is desirable to develop a fuel cell device with an energy recovery system, in which the high-speed and high-pressure air generated by the multi-stage air compressor can be recycled after the fuel cell reactor.

SUMMERY OF THE UTILITY MODEL

The utility model provides a fuel cell device with energy recovery system, including fuel cell reactor and air compression subassembly, the fuel cell reactor includes fuel cell compressed air inlet, fuel cell gas vent, power battery and turbine, the gas outlet of air compression subassembly with fuel cell compressed air inlet connects, the air compression subassembly is set up to produce compressed air as the reaction raw materials of fuel cell reactor, the electric power delivery outlet of fuel cell reactor with power battery's power input mouth is connected, power battery's electric power delivery outlet with the electric power input mouth of air compression subassembly is connected, the air inlet of turbine with the fuel cell gas vent is connected.

Further, the power generation device also comprises a generator, wherein the turbine is arranged to drive an input shaft of the generator to rotate, and a power output port of the generator is connected with a power input port of the power battery.

Further, the fuel cell reactor comprises a hydrogen inlet and a fuel cell water outlet, hydrogen serving as a reaction raw material enters the fuel cell reactor from the hydrogen inlet, compressed air enters the fuel cell reactor from the fuel cell compressed air inlet, waste water generated by reaction is discharged from the fuel cell water outlet, and waste gas generated by reaction is discharged from the fuel cell exhaust outlet.

Further, the air compression assembly includes a motor and a compressor, an air outlet of the compressor is connected to the fuel cell compressed air inlet, and the compressed air assembly is configured to provide compressed air to the fuel cell reactor.

Further, the motor is configured to drive the compressor to rotate.

Further, the compressor comprises a first-stage compressor and a second-stage compressor, wherein an air inlet of the first-stage compressor is connected with the atmosphere, an air outlet of the first-stage compressor is connected with an air inlet of the second-stage compressor, and an air outlet of the second-stage compressor is connected with an air inlet of compressed air of the fuel cell.

Further, the air inlet of the first-stage compressor and the air inlet of the second-stage compressor are both far away from the motor, and the air outlet of the compressor and the air outlet of the second-stage compressor are both close to the motor.

Further, still include the intercooler, the air inlet of intercooler with the gas outlet of secondary compressor is connected, the intercooler is provided with two gas outlets, and one of them gas outlet sets up in the bearing position of motor.

Further, a humidifier is included, the humidifier configured to increase the humidity of the compressed air.

Further, the air filter is arranged at an air inlet of the primary compressor.

Compared with the prior art, the fuel cell device with the energy recovery system has the technical effects that: the waste gas after the reaction of the fuel cell can be recovered, the energy carried in the high-flow-rate and high-pressure waste gas is converted into electric energy to be supplemented into an electric power system, the unit energy consumption of the whole hydrogen fuel cell is reduced, and the endurance mileage of the whole vehicle under the same hydrogen storage capacity is improved. Meanwhile, the cost of hydrogen is reduced, so that the competitiveness of the hydrogen fuel cell system relative to other principle cell systems is improved.

Drawings

FIG. 1 is a schematic structural diagram of one embodiment of the present application;

FIG. 2 is a schematic structural diagram of another embodiment of the present application;

the system comprises a fuel cell reactor 10, a hydrogen inlet 11, a fuel cell compressed air inlet 12, a fuel cell water outlet 13, a fuel cell exhaust 15, a power cell 20, a turbine 30, a turbine inlet 31, a turbine exhaust 32, a generator 33, an air compression assembly 40, an air filter 41, a primary compressor 42, a secondary compressor 43, a motor 44, an intercooler 51 and a humidifier 52.

Detailed Description

The embodiments of the present invention will be described with reference to the accompanying drawings for clarity and understanding. The present invention may be embodied in many different forms of embodiments, and the scope of the invention is not limited to the embodiments described herein.

Example 1

As shown in fig. 1, the dotted line indicates the air flow direction, and the implementation indicates the power connection direction. The present embodiment includes a fuel cell reactor 10. The fuel cell reactor 10 is the most core component of the fuel cell device, and uses hydrogen and oxygen as raw materials to generate electric energy, waste water and waste gas after reaction, wherein the waste water is discharged through a fuel cell water outlet 13, and the waste gas is discharged through a fuel cell exhaust port 15. The fuel cell reactor 10 is provided with a hydrogen inlet 11 and a fuel cell compressed air inlet 12, wherein hydrogen enters the reactor from the hydrogen inlet 11, and compressed air with oxygen enters the reactor through the fuel cell compressed air inlet 12. Wherein the compressed air is from the air compressor assembly 40. The air compressor assembly 40 includes an air filter 41, a compressor assembly, and a motor 44. The outside air is filtered by the air filter 41 and then enters the compression assembly. The compression assembly is driven by the motor 44 to increase the pressure and flow rate of the air to form compressed air. Within a certain range, the higher the pressure and the higher the flow rate of the compressed air, i.e. the greater the amount of oxygen entering the reactor, and thus the higher the power of the fuel cell. Therefore, in this embodiment, two compressors are connected in series, i.e., the compression assembly includes a first-stage compressor 42 and a second-stage compressor 43.

Wherein, the air inlet of the primary compressor 42 is connected with the air outlet of the air filter 41, and the air at normal pressure enters the primary compressor 42 after being filtered by the air filter 41. The compressing assembly 42 is driven by a motor 44 to compress air at normal pressure to obtain compressed air after one-stage compression. The air outlet of the first-stage compressor 42 is connected with the air inlet of the second-stage compressor 43, the air after the first-stage compression enters the second-stage compressor 43, and the second-stage compressor 43 is driven by the same motor 44 to pressurize and accelerate the air after the first-stage compression again. Preferably, the air inlets of the primary compressor 42 and the secondary compressor 43 are both disposed away from the motor 44, and the air outlets of the primary compressor 42 and the secondary compressor 43 are both disposed close to the motor 44. Since the compressing assembly is driven by the motor 44 to rotate, the air is pressurized, and meanwhile, an axial force is generated on the compressing assembly due to a reaction force generated by the air, so that an axial movement trend is formed, and the stability of the bearing is affected. When the two groups of compression assemblies are arranged in opposite directions, namely in the arrangement mode in the embodiment, the air reaction forces applied to the two groups of compression assemblies are opposite in direction and mutually offset, so that the influence of the axial force on the bearing can be eliminated.

An air outlet of the secondary compressor 43 is connected to an air inlet of the intercooler 51, and the compressed air is cooled after passing through the intercooler 51. A part of the cooled compressed air is introduced back into the motor 44 to directly cool the bearing of the motor 44, and the other part of the cooled compressed air flows through the humidifier 52 and enters the fuel cell reactor 10 to participate in the reaction as a raw material.

In this embodiment, the exhaust gas after participating in the completion of the fuel cell reaction is discharged through the fuel cell exhaust port 15. Since the exhaust gases still have a high pressure and flow rate and are discharged directly to the atmosphere, wasting the energy carried by them, a turbine 30 is provided in this embodiment, together with a generator 33. The turbine 30 is disposed coaxially with the generator 33, or is connected through a transmission assembly, such that the turbine 30, when rotated, rotates the input shaft of the generator 33. The exhaust port 15 of the fuel cell is connected with the inlet port 31 of the turbine, so that the high-flow-rate exhaust gas after participating in the reaction of the fuel cell enters the turbine 30, and after the high-flow-rate exhaust gas drives the turbine 30 to rotate and release the kinetic energy thereof, the formed low-flow-rate exhaust gas is exhausted to the atmosphere from the exhaust port 32 of the turbine. The turbine 30 is rotated by the high-speed exhaust gas, and at the same time, the generator 33 is driven to generate electricity. The electrical energy generated by the fuel cell reactor 10 and the generator 33, in addition to powering the motor 44 of the air compression assembly 40, also powers other loads in the power system.

Example 2

As shown in fig. 2, the present embodiment is different from embodiment 1 in that the electric energy generated by the fuel cell reactor 10 and the generator 33 is not directly connected to the motor 44 and other loads, but is stored by the power battery 20. When the load consumed power is less than the generated power, the surplus electric energy is stored in the power battery 20; when the load consumes more power than the generated power, electric energy can be taken from the power battery 20. Therefore, the generated power does not need to change along with the consumed power of the load, and the electric energy is not wasted.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the teachings of this invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims

1. A fuel cell device with an energy recovery system, comprising a fuel cell reactor and an air compression assembly, wherein the fuel cell reactor comprises a fuel cell compressed air inlet, a fuel cell exhaust, a power cell and a turbine, wherein an air outlet of the air compression assembly is connected to the fuel cell compressed air inlet, the air compression assembly is configured to generate compressed air as a reaction raw material of the fuel cell reactor, an electrical power outlet of the fuel cell reactor is connected to an electrical power inlet of the power cell, an electrical power outlet of the power cell is connected to an electrical power inlet of the air compression assembly, and an air inlet of the turbine is connected to the fuel cell exhaust.

2. The fuel cell device with an energy recovery system of claim 1, further comprising a generator, wherein the turbine is configured to rotate an input shaft of the generator, and wherein an electrical power output of the generator is connected to an electrical power input of the power cell.

3. The fuel cell apparatus with an energy recovery system according to claim 2, wherein the fuel cell reactor includes a hydrogen inlet port through which hydrogen as a reaction raw material enters the fuel cell reactor, and a fuel cell outlet port through which compressed air enters the fuel cell reactor, waste water generated by the reaction is discharged through the fuel cell outlet port, and waste gas generated by the reaction is discharged through the fuel cell outlet port.

4. The fuel cell device with energy recovery system of claim 3, wherein the air compression assembly comprises a motor and a compressor, an air outlet of the compressor is connected to the fuel cell compressed air inlet, and the air compression assembly is configured to provide compressed air to the fuel cell reactor.

5. The fuel cell device with an energy recovery system of claim 4, wherein the motor is configured to drive the compressor to rotate.

6. The fuel cell device with energy recovery system of claim 5, wherein the compressor comprises a primary compressor and a secondary compressor, the primary compressor having an inlet connected to the atmosphere, the primary compressor having an outlet connected to the inlet of the secondary compressor, and the secondary compressor having an outlet connected to the inlet of the compressed air of the fuel cell.

7. The fuel cell device with an energy recovery system of claim 6, wherein the air inlet of the primary compressor and the air inlet of the secondary compressor are both disposed away from the motor, and the air outlet of the primary compressor and the air outlet of the secondary compressor are both disposed proximate to the motor.

8. The fuel cell device with an energy recovery system of claim 7, further comprising an intercooler, wherein an air inlet of the intercooler is connected with an air outlet of the secondary compressor, the intercooler is provided with two air outlets, and one of the air outlets is arranged at a bearing position of the motor.

9. The fuel cell device with an energy recovery system of claim 8, further comprising a humidifier configured to increase the humidity of the compressed air.

10. The fuel cell device with an energy recovery system of claim 9, further comprising an air filter disposed at an air inlet of the primary compressor.