电
制氢
热化学循环
环境科学
发电
生产(经济)
兰金度
朗肯循环
收入
废物管理
工艺工程
环境经济学
氢
业务
化学
工程类
经济
热力学
微观经济学
功率(物理)
物理
电气工程
会计
有机化学
作者
Vishnu Kumar Budama,Nathan G. Johnson,Ivan Ermanoski,Ellen B. Stechel
标识
DOI:10.1016/j.ijhydene.2020.10.060
摘要
The two-step thermochemical metal oxide water-splitting cycle with the state-of-the-art material ceria inevitably produces unutilized high-quality heat, in addition to hydrogen (H2). This study explores whether the ceria cycle can be of greater value by using the excess heat for co-production of electricity. Specially, this technoeconomic study estimates the H2 production cost in a hybrid ceria cycle, in which excess heat produces electricity in an organic Rankine cycle, to increase revenue and decrease H2 cost. The estimated H2 cost from such a co-generation multi-tower plant is still relatively high at $4.55/kg, with an average H2 production of 1431 kg/day per 27.74 MWth tower. Sensitivity analyses show opportunities and challenges to achieving $2/kg H2 through improvements such as increased solar field efficiency, increased revenue from electricity sales, and a decreased capital recovery factor from baseline assumptions. While co-production improves overall system efficiency and economics, achieving $2/kg H2 remains challenging with ceria as the active material and likely will require a new material.
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