Fuel cell low-temperature starting heating and waste heat recovery system based on strontium chloride ammoniate heat storage

Abstract

The invention discloses a fuel cell low-temperature starting heating and waste heat recovery system based on strontium chloride ammoniate heat storage, and belongs to the technical field of fuel cells. According to the invention, the principle that ammonia gas and strontium chloride are obtained through a process that strontium chloride ammoniate is subjected to a chemical desorption process afterbeing heated is utilized, and the waste heat generated during the operation of the fuel cell is stored in the chemical energy of ammonia gas and strontium chloride. When a fuel cell is started at a low temperature, heat is released in the process of obtaining strontium chloride ammoniate through chemical adsorption between ammonia gas and strontium chloride, the heat is transferred to a fuel cellstack, and the fuel cell is helped to be rapidly heated and started under the low-temperature condition under the condition that extra power is not consumed. According to the system, the waste heat of the fuel cell is used for helping the temperature rise in the low-temperature starting process, a thermochemical energy storage mode is adopted, the energy storage loss is small, the energy efficiency is high, the starting speed of the fuel cell is increased under the condition of not consuming extra electric quantity, and irreversible structural damage caused by low-temperature starting to thefuel cell is eliminated.

Description

technical field [0001] The invention relates to a fuel cell low-temperature start-up and waste heat recovery system, in particular to a fuel cell low-temperature start-up heating and waste heat recovery system based on ammonium strontium chloride heat storage. Background technique [0002] As an important form of hydrogen energy utilization, hydrogen fuel cells can directly convert chemical energy into electrical energy. Because of its high efficiency, no pollution, low noise, and rapid energy replenishment, it is widely used in automobiles, ships, aerospace, distributed power generation and other fields. The water generated by the fuel cell starting at low temperature may freeze, causing irreversible structural damage to the fuel cell stack. [0003] Common methods for low-temperature start-up of fuel cells include shutting down and purging, external preheating, and internal heating. However, the shutdown and purging often cannot take away the residual moisture in the mem...

AI Technical Summary

Problems solved by technology

However, the shutdown and purging often cannot take away the residual moisture in the membrane electrode in a short time. External preheating methods such as electric heater heating require electricity when starting, which requi

Images