气候变化领域集成服务门户(CCPortal): Continuous electrochemical heat engines

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DOI	10.1039/c8ee01137k
	Continuous electrochemical heat engines
	Poletayev A.D.; McKay I.S.; Chueh W.C.; Majumdar A.
发表日期	2018
ISSN	17545692
起始页码	2964
结束页码	2971
卷号	11 期号:10
英文摘要	Given the large magnitude of energy in waste heat, its efficient conversion to electrical power offers a significant opportunity to lower greenhouse gas emissions. However, it has been difficult to optimize the performance of new direct energy conversion approaches because of the coupling between entropy change and thermal and electrical transport in continuously operating devices. With electrochemical cells driving flowing electrolytes in symmetric redox reactions at different temperatures, we demonstrate two continuous electrochemical heat engines that operate at 10-50 °C and at 500-900 °C, respectively. Simulations of kilowatt-scale systems using electrochemical cells stacked in series suggest efficiencies over 30% of the Carnot limit and areal power densities competitive with solid-state thermoelectrics at maximum power. Although entropy change, thermal transport and electrical transport are inherently coupled in solid-state thermoelectrics, they can be somewhat circumvented in electrochemical systems, thus offering new opportunities to engineer efficient energy conversion systems. © 2018 The Royal Society of Chemistry.
英文关键词	Direct energy conversion; Electrochemical cells; Energy conversion; Energy efficiency; Entropy; Gas emissions; Greenhouse gases; Redox reactions; Waste heat; Electrical power; Electrical transport; Electrochemical systems; Energy conversion systems; Flowing electrolytes; Operating devices; Thermal and electrical transport; Thermal transport; Heat engines; electrical power; electrochemical method; energy efficiency; engine; equipment; fuel cell; greenhouse gas; operations technology; performance assessment; temperature effect
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190119
作者单位	Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, United States; Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, United States; Department of Chemical Engineering, Stanford University, Stanford, CA 94305, United States; Stanford Precourt Institute for Energy, Stanford, CA 94305, United States; Department of Mechanical Engineering, Stanford University, Stanford, CA 94305, United States
推荐引用方式 GB/T 7714	Poletayev A.D.,McKay I.S.,Chueh W.C.,et al. Continuous electrochemical heat engines[J],2018,11(10).
APA	Poletayev A.D.,McKay I.S.,Chueh W.C.,&Majumdar A..(2018).Continuous electrochemical heat engines.Energy & Environmental Science,11(10).
MLA	Poletayev A.D.,et al."Continuous electrochemical heat engines".Energy & Environmental Science 11.10(2018).