Energy recovery device of fuel cell turbine recovery expansion machine
By allowing air to enter the vortex end of the air compressor for energy recovery in the fuel cell system, the energy loss problem caused by humid air passing through the humidifier and soda separator in the prior art is solved, and more efficient energy recovery and system efficiency improvement are achieved.
Patent Information
- Application Number
- CN202422619860.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-10-29
AI Technical Summary
In the existing fuel cell system, the turbo recovery expander loses heat and kinetic energy when humid air passes through the humidifier and soda separator during the energy recovery process, resulting in a decrease in recovery efficiency.
First enter the vortex end of the air compressor for energy recovery, and then humidify it to the humidifier to avoid the loss of energy in the humidifier and soda separator.
It improves energy recovery efficiency, reduces energy waste, and improves the overall energy utilization rate of the system.
Smart Images
Figure CN223152113U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of fuel cells, and particularly relates to an energy recovery device for a fuel cell turbine recovery expander. Background Art
[0002] In a fuel cell system, energy recovery is a key strategy for improving efficiency, especially for applications that require high efficiency and performance, such as automobiles and power plants. A fuel cell generates electrical energy through the reaction of hydrogen and oxygen, while generating water and heat. In this process, in addition to electrical energy, a part of the energy is released in the form of heat. If this part of the heat energy can be effectively utilized, the overall energy efficiency of the system will be greatly improved.
[0003] A turbine recovery expander is one of the technologies used to recover this part of the heat energy. Its working principle is to use the high-pressure gas generated by the fuel cell (usually unreacted air, nitrogen, and water vapor generated by the reaction, etc.) to drive the turbine to rotate, thereby converting the heat energy into mechanical energy. This mechanical energy can be used to directly drive the impeller of the air compressor to reduce the overall energy consumption of the system.
[0004] In the prior art, the turbine recovery method is as follows: the wet air (containing kinetic energy and heat energy) coming out of the stack needs to pass through a humidifier and a steam-water separator before entering the vortex end of the air compressor for recovery by the air compressor. In this way, when they pass through the humidifier and the steam-water separator, part of the heat energy and kinetic energy will be lost, resulting in a decrease in the recovery efficiency. Content of the Utility Model
[0005] The utility model provides an energy recovery device for a fuel cell turbine recovery expander. This device allows air to first enter the vortex end of the air compressor for energy recovery, and then be sent to the humidifier for humidification after the recovery, thereby avoiding energy waste and improving the recovery efficiency.
[0006] The technical solution of the utility model is as follows.
[0007] An energy recovery device for a fuel cell turbine recovery expander includes an air flow meter, a turbine recovery expander, an intercooler, a humidifier, and a stack; the air flow meter, the turbine recovery expander, and the intercooler are connected by pipelines, and the pipeline at the outlet of the intercooler is connected to the air inlet of the stack through the humidifier; the air outlet of the stack is connected to the turbine air inlet of the turbine recovery expander;
[0008] The pipeline at the turbine exhaust port of the turbine recovery expander is discharged to the atmosphere after passing through the humidifier.
[0009] Furthermore, a throttle valve is provided on the pipeline between the humidifier and the stack.
[0010] Further, a pressure sensor and a temperature sensor are provided on the pipeline between the throttle valve and the fuel cell stack.
[0011] Further, a pressure sensor is provided on the pipeline between the air outlet of the fuel cell stack and the turbine recovery expander.
[0012] Further, the air flow meter is connected to the atmosphere.
[0013] Compared with the prior art, the advantages of the present utility model are as follows:
[0014] In the present utility model, air first enters the volute end of the air compressor for energy recovery, and after the recovery, it is given to the humidifier for humidification, avoiding the loss caused by the energy first entering the humidifier and the steam-water separator, thereby improving the recovery efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic structural diagram of the present utility model.
[0016] Each component in the figure is as follows: air flow meter 1, turbine recovery expander 2, intercooler 3, humidifier 4, throttle valve 5, pressure sensor 6, temperature sensor 7, fuel cell stack 8. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0017] In the following description, the technical solutions are elaborated in conjunction with specific drawings to fully understand the present invention application. However, the present invention application can be implemented in many other ways different from those described herein. Similar extended embodiments made by those of ordinary skill in the art without creative efforts all fall within the scope of protection of the present invention.
[0018] As Figure 1 shown, a fuel cell turbine recovery expander energy recovery device includes an air flow meter 1, a turbine recovery expander 2, an intercooler 3, a humidifier 4 and a fuel cell stack 8; the air flow meter 1, the turbine recovery expander 2 and the intercooler 3 are connected by pipelines, and the outlet pipeline of the intercooler 3 passes through the humidifier 4 and is connected to the air inlet of the fuel cell stack 8; the air outlet of the fuel cell stack 8 is connected to the turbine air inlet of the turbine recovery expander 2; the turbine exhaust pipeline of the turbine recovery expander 2 passes through the humidifier 4 and then the air is discharged to the atmosphere.
[0019] In this embodiment, a throttle valve 5 is provided on the pipeline between the humidifier 4 and the fuel cell stack 8.
[0020] In this embodiment, a pressure sensor 6 and a temperature sensor 7 are provided on the pipeline between the throttle valve 5 and the fuel cell stack 8.
[0021] In this embodiment, a pressure sensor 6 is provided on the pipeline between the air outlet of the fuel cell stack 8 and the turbine recovery expander 2.
[0022] In this embodiment, the air flow meter 1 is connected to the atmosphere.
[0023] In this embodiment, a steam-water separator is not used for energy recovery because the current turbine recovery impeller has been made to withstand wet air, so there is no need for steam-water separation and it can directly enter. By allowing the wet air containing energy to first pass through the turbine recovery, it is ensured that the energy recovery is completed first and then it is supplied to the humidifier for humidification.
[0024] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.
Claims
1. A fuel cell turbine recovery expander energy recovery device, characterized in that, It includes an air flow meter (1), a turbine recovery expander (2), an intercooler (3), a humidifier (4) and an electric stack (8); the air flow meter (1), the turbine recovery expander (2) and the intercooler (3) are connected by pipelines, and the outlet pipeline of the intercooler (3) is connected to the air inlet of the electric stack (8) through the humidifier (4); the air outlet of the electric stack (8) is connected to the turbine air inlet of the turbine recovery expander (2); The pipeline of the turbine exhaust port of the turbine recovery expander (2) is discharged to the atmosphere after passing through the humidifier (4).
2. The energy recovery device of a fuel cell turbine recovery expander as described in claim 1, characterized in that, A throttle valve (5) is provided on the pipeline between the humidifier (4) and the electric stack (8).
3. The energy recovery device of a fuel cell turbine recovery expander as described in claim 2, wherein A pressure sensor (6) and a temperature sensor (7) are provided on the pipeline between the throttle valve (5) and the electric stack (8).
4. The energy recovery device of a fuel cell turbine recovery expander according to claim 1, characterized in that, A pressure sensor (6) is provided on the pipeline between the air outlet of the electric stack (8) and the turbine recovery expander (2).
5. The energy recovery device for a fuel cell turbine recovery expander as described in claim 1, wherein The air flow meter (1) is connected to the atmosphere.