High-specific-energy aeronautical fuel cell power generation apparatus and control method thereof
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A fuel cell and power generation device technology, applied in the direction of fuel cells, fuel cell additives, fuel cell heat exchange, etc., can solve the problem that liquid hydrogen cannot be directly used for power generation by fuel cells, and achieve light weight, high reliability, and energy density high effect
Active Publication Date: 2018-06-05
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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[0004] However, liquid hydrogen cannot be directly used for fuel cell power generation, it needs to be used after gasification, and the gasification process requires heat from the external environment
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Embodiment 1
[0023] A schematic flow chart of Embodiment 1 of an aviation fuel cell power generation system using liquid hydrogen as fuel with high specific energy is as follows figure 1 Shown: This process is applicable to an aviation hydrogen-air fuel cell power generation system that uses hydrogen as fuel and oxygen in the air as oxidant. The heat generated during the working process of the fuel cell is used as the heat source for the gasification of liquid hydrogen, and the high-speed flowing air outside the aircraft wall is used as the cold medium for heat exchange to achieve efficient thermal management of the entire system. By controlling the on-off of the solenoid valve for water, the pipeline is switched, and then the gasification speed of liquid hydrogen can be controlled to achieve the purpose of changing the working condition of the fuel cell.
[0024] to combine figure 1 , the present invention consists of a liquid hydrogen storage tank 1, a buffer tank 2, a pressure sensor 3...
Embodiment 2
[0031] The specific operation steps of embodiment 2 are the same as embodiment 1. Only the design of the heat exchanger 13 can be different, the same principle is to utilize high-speed air as the cooling medium, the heat exchanger of this embodiment is not necessarily designed as a part of the outer surface of the aircraft. Considering the specific structure of the aircraft, when the heat exchanger is not suitable to be placed on the surface of the aircraft, it can be designed as an independent part, placed near the air vent of the aircraft, or hung outside the cabin, and then used when the cooling capacity does not meet the requirements Forced exhaust for cooling.
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Abstract
The invention relates to a high-specific-energy aeronautical fuel cell power generation system, especially an aeronautical proton exchange membrane fuel cell power generation system with liquid hydrogen as a fuel. The power generation system comprises a liquid hydrogen storage tank, a buffer tank, a pressure sensor, a hydrogen pressure reducer, a solenoid valve for water, a solenoid valve for hydrogen, a proton exchange membrane fuel cell, an air pump, a circulating water pump, a water tank, a temperature regulator, a heat exchanger, etc. According to the invention, the own heat of the fuel cell is used for providing a heat source to the liquid hydrogen storage tank so as to realize gasification of hydrogen; oxygen in the air is used as an oxidant; and high-speed incoming air out of an aircraft is used as a cold medium to dissipate excess heat of the fuel cell. Compared with conventional aeronautical fuel cell power generation systems storing hydrogen with high-pressure gas cylinders,the high-specific-energy aeronautical fuel cell power generation system of the invention has the advantages of great hydrogen storage capacity, light weight, small size, low working pressure, safety,reliability, fast fuel filling rate, simple fuel filling mode and the like and especially applicable to aeronautical fuel cell power generation systems with high requirements for long endurance, weight and size.
Description
technical field [0001] The invention relates to a high specific energy aviation fuel cell power generation system, in particular to an aviation proton exchange membrane fuel cell power generation system using liquid hydrogen as fuel. Background technique [0002] A fuel cell is different from a battery in the traditional sense. It is a high-efficiency power generation device that converts chemical energy stored in fuel and oxidant into electrical energy through electrochemical reactions. Different from the traditional internal combustion engine, although it needs fuel and oxidant like the internal combustion engine, it does not need to be burned, and can complete the chemical reaction at low temperature to realize the power generation function. There are many types of fuel cells, which can be divided into alkaline fuel cells, proton exchange membrane fuel cells, phosphoric acid fuel cells, molten carbonate fuel cells and solid oxide fuel cells according to different electrol...
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