文章摘要
徐士鸣,何其琛,吴曦,吴德兵,胡军勇,张凯,金东旭,王平.顺、逆流串联电路逆电渗析电堆发电系统能量转换效率研究[J].,2019,59(1):20-27
顺、逆流串联电路逆电渗析电堆发电系统能量转换效率研究
Investigation on energy conversion efficiency of series RED stacks power generation system in solution co-flow or counter-flow
  
DOI:10.7511/dllgxb201901004
中文关键词: 顺流  逆流  逆电渗析电堆  串联电路  能量转换效率
英文关键词: co-flow  counter-flow  reverse electrodialysis stacks  series circuit  energy conversion efficiency
基金项目:国家自然科学基金资助项目(51776029,51606024).
作者单位
徐士鸣,何其琛,吴曦,吴德兵,胡军勇,张凯,金东旭,王平  
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中文摘要:
      通过建立逆电渗析(RED)电堆能量转换模型,对稀和浓溶液顺、逆流时多个RED 电堆(多电极)串联电路的发电系统进行理论研究.比较了顺、逆流两种流动方式下RED电堆流道总长、溶液流速以及RED电堆数量对系统能量转换效率及输出特性的影响.模拟计算结果表明:在设定参数下,降低溶液流速,增加流道总长和电堆数量均能提升系统能量转换效率.溶液逆流时的系统能量转换效率、输出电压和功率密度均高于溶液顺流时的情况.与溶液顺流时相比,逆流时溶液流速和流道总长的变化对系统能量转换效率的影响要大些,而电堆数量影响要小些.电堆数量增加会提高发电系统输出电压和功率密度,但总内阻也随之增加,导致系统推荐的工作范围变窄.
英文摘要:
      By developing the model for reverse electrodialysis (RED) stack energy conversion, the RED power generation system with series multiple stacks (or multiple electrodes) in which weak and strong solutions are in co-flow or counter-flow was researched. The influences of total flow passageway length, solution flow velocity and number of RED stacks on energy conversion efficiency and output characteristics of the system were discussed by comparing two flow ways, co-flow or counter-flow. Simulation results show that under the given operation parameters, reducing solution flow velocity and increasing total flow passageway length and RED stack number can improve energy conversion efficiency of the system. The energy conversion efficiency, output voltage and power density of system with solution counter-flow are higher than those with solution co-flow. Compared with the system with solution co-flow, the variations of solution flow velocity and total flow passageway length with solution counter-flow have more influence on energy conversion efficiency of the system, but the variation of RED stack number has less influence. The increase of RED stack number will make not only the growth of the output voltage and power density of the system, but also the growth of the internal resistance of system, which leads to the recommended operation scope of system narrow.
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