贮氢合金在PEMFC发电系统中的应用

Research of application of hydrogen storage alloys to PEMFC power system

通过金属氢化物贮氢合金的充、放氢特性试验,以及贮氢器与质子交换膜燃料电池(PEMFC)发电系统的匹配等试验,获得金属氢化物贮氢合金与PEMFC相匹配的技术特性。发现温度、充/放氢压力以及PEMFC负载等因素影响贮氢器的放氢性能。高的充氢压力有利于提高贮氢合金的储氢量,高的温度和压力能够改善贮氢合金的放氢性能,放氢速率随负载的变化而变化,其变化趋势相同。综合考虑贮氢合金性能的影响因素以及PEMFC发电系统的热特性,最后提出了贮氢合金作为PEMFC发电系统储氢单元的技术方案。

By virtue of the characteristic test of aeration and release of metal hydride hydrogen storage alloy and the matching of hydrogen storage tank and PEMFC power system, matching characteristic of hydrogen storage alloy and PEMFC was acquired. Results show that the temperature, the aeration/release pressure and the load of PEMFC influence the release capability of hydrogen storage tank. The higher the aeration pressure is, the more the capacity of metal hydride hydrogen storage tank. High temperature and high pressure are benefit for release of metal hydride hydrogen storage tank. The load of PEMFC influences instantaneous flux, and their change tendency are same. Considering the influence factors of metal hydride hydrogen storage tank and the thermal characteristic of PEMFC, technical project of hydrogen storage alloy for PEMFC power system hydrogen storage is put forward at last.