Fuel cell engine system

Abstract

The invention discloses a fuel cell engine system, comprising a fuel cell stack, a distribution assembly, a hydrogen supply unit, an air supply unit, a cooling unit and a heat exchanger, wherein a humidifier of the air supply unit is omitted; the hydrogen supply unit comprises a hydrogen reflux part; the hot end of the heat exchanger is air fluid while the cold end of the heat exchanger is provided with two independent fluids, namely a hydrogen fluid and a cooling cycle fluid; the hot end inlet of the heat exchanger is connected with a vent of an air compressor while the hot end outlet is connected with an air inlet of the fuel cell stack; the two fluid inlets of the cold end of the heat exchange are respectively connected with a control valve outlet of a hydrogen storage tank outlet and a cooling cycle pump outlet; the two fluid outlets of the cold end of the heat exchanger are respectively connected with the fuel cell stack hydrogen inlet and cooling cycle pump inlet. The fuel cell engine system has the beneficial effects that the air cooler and the hydrogen preheater are combined, and hydrogen flux is used for replacing the air side humidifier, thus simplifying the system, reducing the size and weight of the parts, and reducing the system energy consumption.

Description

technical field [0001] The invention belongs to the field of fuel cells, in particular to a fuel cell engine system. Background technique [0002] In order to protect the environment and reduce air pollution in cities, devices powered by PEMFC (Proton Exchange Membrane Fuel Cell) have received more and more attention. When PEMFC is fueled by pure hydrogen, it can achieve true "zero" emissions. At present, PEMFC has certain applications in transportation, communication and other fields. [0003] The fuel cell engine system in the prior art is equipped with an air cooler and a hydrogen preheater. The air cooler needs cooling circulating water to cool down, and the hydrogen preheater needs cooling circulating water to preheat. Since the amount of water required by the two is inconsistent, it is necessary to start from There are two branches in the cooling circulation pipeline, which respectively cool the air and preheat the hydrogen. The disadvantage is that the water delivery...

AI Technical Summary

Problems solved by technology

[0003] The fuel cell engine system in the prior art is equipped with an air cooler and a hydrogen preheater. The air cooler needs cooling circulating water to cool down, and the hydrogen preheater needs cooling circulating water to preheat. Since the amount of water required by the two is inconsistent, it is necessary to start from There are two branches in the cooling circulation pipeline, which respectively cool the air and preheat the hydrogen. The disadvantage is that the water delivery of the cooling circulation pump is large, and the energy consumption of the cooling circulation pump is large.

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