Enhanced ammonia regeneration of thermal regenerated batteries

doi:10.11949/0438-1157.20200487

Abstract

Abstract:

Regeneration using low-grade thermal energy is one of the most important components of the thermal regenerative battery (TRB) system. In this study, the effects of the regenerative electrolyte on the performance of TRB and the effects of temperature and mass transfer on the thermal regeneration are studied. The experimental results showed that the maximum power of TRB using regenerated electrolyte was 5.7 mW, which was 14% lower than that of TRB using initial electrolyte (6.5 mW). In the process of thermal regeneration, the increasing of temperature can obviously strengthen the process of thermal regeneration, and the performance of thermal regeneration can also be effectively improved by using glass balls bed and stirring.

Key words: thermal regenerative ammonia-based battery, electrochemistry, maximum power, mass transfer, heat transfer

摘要：

利用低温热能的热再生过程是热再生电池（thermally regenerative battery，TRB）系统的重要组成之一，针对TRB的产电和热再生过程，研究了使用再生电解液的TRB产电性能以及温度和强化传热传质措施对热再生过程的影响。研究结果表明，产电过程中，使用再生电解液的TRB最大功率为5.7 mW，比初始电解液的TRB（最大功率为6.5 mW）低14%；热再生过程中，提高温度可以明显强化热再生过程，采用玻璃球床和搅拌措施也可以有效提高热再生过程的性能。

关键词: 热再生氨电池, 电化学, 最大功率, 传质, 传热

CLC Number:

X 703.1

Yu SHI, Liang ZHANG, Jun LI, Qian FU, Xun ZHU, Qiang LIAO, Pengyu CHEN. Enhanced ammonia regeneration of thermal regenerated batteries[J]. CIESC Journal, 2020, 71(S2): 253-258.

石雨, 张亮, 李俊, 付乾, 朱恂, 廖强, 陈鹏宇. 热再生电池氨再生过程强化[J]. 化工学报, 2020, 71(S2): 253-258.

Figures/Tables 4

Fig.1 Relationship between pH value of anode solution and ammonia concentration

Fig.2 pH variation of regenerated electrode solution (a); power generation and polarization curve (b); cathode and anode potential (c)

Fig.3 Effect of temperature on pH of regenerated cathode solution

Fig.4 Effect of enhanced heat and mass transfer measures on pH of regenerated cathode liquid

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