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Date of Publication:2019-01-01

Journal:大连理工大学学报

Affiliation of Author(s):能源与动力学院

Volume:59

Issue:1

Page Number:20-27

ISSN No.:1000-8608

Abstract: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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