Thermodynamic analysis of a combined cycle of ammonia-based battery and absorption refrigerator

Shaozhi Zhang, Jielin Luo, Yiyang Xu, Guangming Chen and Qin Wang

Energy, 2021, vol. 220, issue C

Abstract: Heat driven battery is a type of technology that develops quickly in recent years. The power density of thermally regenerative ammonia-based battery (TRAB) using copper-based redox couples is among the highest within aqueous-based thermoelectrochemical systems, whereas cycle construction according to the battery characteristics still needs research. This paper presents such an attempt which combines TRAB with NH3/LiNO3/H2O absorption refrigerator. A thermodynamic model is established and detailed theoretical analyses are carried out for the new cycle. The impacts of operation factors (such as heat source temperature and cooling condition) and design parameters (such as compositions of battery electrolyte and absorbent) on system efficiency are investigated. Furthermore, the design procedure of a combined cycle under restrictions of heating and cooling condition is illustrated. While the temperatures of heat source and sink are 135 °C and 20 °C respectively, the combined cycle can run either in refrigeration mode with COP of 0.388 and evaporation temperature at −33 °C, or in battery mode with a thermal efficiency of 3.753%. The performances of the combined cycle are compared with those of existing NH3/LiNO3/H2O absorption refrigerators and heat driven batteries. Moreover, the economic of combined cycle is evaluated, while its feasibility of operating at scale is also discussed.

Keywords: Thermodynamic analysis; Thermally regenerative battery; NH3/LiNO3/H2O absorption refrigerator; Combined cycle (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:220:y:2021:i:c:s0360544220328358

DOI: 10.1016/j.energy.2020.119728

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