氢化物
氢气储存
可再生能源
电力转天然气
氢燃料
氢
储能
环境科学
核工程
工艺工程
功率(物理)
材料科学
化学
热力学
电气工程
工程类
物理
有机化学
物理化学
电解
电极
电解质
作者
Naruki Endo,Kiyotaka Goshome,Maeda Tetsuhiko,Yuta Segawa,Eisuke Shimoda,Tsuyoshi Nozu
标识
DOI:10.1016/j.ijhydene.2020.10.002
摘要
Abstract To ensure the energy efficiency of renewable hydrogen energy systems, power conservation and thermal management are necessary. This study applies these principals to the operation of metal hydride tanks (MHTs) in a bench-scale hydrogen system, named Hydro Q-BiC™, comprising photovoltaic panels (20 kW), an electrolyzer (5 Nm3/h), MHTs containing a TiFe-based MH (40 Nm3), fuel cells (FC; 3.5 kW(power)/2.5 kW(heat)), and Li-ion batteries (20 kW/20 kWh). Here, we show that in a modified hydrogen production operation, with limited use of auxiliaries for cooling the MHTs, the power consumption of the MHTs was reduced by more than 99% compared to a typical operation. The thermal requirements for the MHTs were reduced by ceasing production in a pressurized state. During the hydrogen use operation, the power consumption was reduced to 1/4 and the FC heat output could be fully used; hence, the overall energy efficiency (power-to-hydrogen-to-power/heat) was as high as ~ 60% (43% for the typical operation).
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