Fuel cell stack cooling system applying spray type cooling

Abstract

The invention discloses a fuel cell stack cooling system using spray cooling, which can solve the heat dissipation problem of a fuel cell power system under a rated working condition, plays a role in collecting and utilizing water generated by electrochemical reaction of a fuel cell, and has the characteristics of good cooling performance and water saving. The system comprises a fuel cell stack, a cooling water circulation device, a condensation water collection device and a spray cooling system, the cooling water circulation device comprises a radiator and a circulation pump which are connected in series through a cooling water circulation pipeline; the condensation water collection device is connected with a fuel cell stack generated water outlet through a condensation pipeline; the condensation water collection device and the spray cooling system are sequentially connected through a pipeline in the water flow direction of water discharged from the fuel cell stack; and the spray cooling system sprays condensed water onto a radiator through a nozzle, and heat dissipation is enhanced through liquid film evaporation and forced convection, so that efficient cooling of the fuel cell stack is realized.

Description

technical field [0001] The invention relates to the field of fuel cell cooling, in particular to a fuel cell stack cooling system. Background technique [0002] A fuel cell is an energy conversion device that directly converts chemical energy into electrical energy. It usually uses hydrogen, methanol or natural gas as fuel, and has the advantages of high efficiency, low noise, and environmental friendliness. [0003] The power generation efficiency of the fuel cell is about 50%. When the fuel cell supplies power, a large amount of heat will be generated. If this part of the heat is not dissipated in time, the operation of the fuel cell will be affected. Compared with the traditional internal combustion engine, the heat load of the fuel cell power system is relatively large. Only about 50% of the heat of the traditional internal combustion engine needs to be taken away by the cooling system, while about 90% of the heat of the fuel cell stack needs to be taken away by the cool...

AI Technical Summary

Problems solved by technology

In addition, the operating temperature range of the fuel cell stack is relatively narrow, relatively speaking, the requirements for the cooling system are higher

[0004] At present, the fuel cell stack is provided with a cooling channel, relying on cooling water to bring heat to the air-cooled radiator, and cooling the radiator through natural wind or cooling fans to take away the heat. The heat dissipation efficiency is low. The power of the fan is too low, and it often cannot meet the heat dissipation requirements when the fuel cell power system is running at the rated working condition; and during the operation of the fuel cell, a large amount of water will be generated along with the chemical reaction, and if it is not used, it will cause waste of water resources

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