OPTIMIZATION OF TEMPERATURE DESIGN PARAMETERS OF CASCADE HIGH-TEMPERATURE HEAT PUMP BASED ON THERMAL ECONOMIC ANALYSIS

Shi Guohua; Wang Ziang; Gao Yuqi; Zhao Yuetian; Liu Bo

doi:10.19912/j.0254-0096.tynxb.2023-1625

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (2) : 218-225. DOI: 10.19912/j.0254-0096.tynxb.2023-1625

OPTIMIZATION OF TEMPERATURE DESIGN PARAMETERS OF CASCADE HIGH-TEMPERATURE HEAT PUMP BASED ON THERMAL ECONOMIC ANALYSIS

Shi Guohua, Wang Ziang, Gao Yuqi, Zhao Yuetian, Liu Bo

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Abstract

Cascade heat pump is an effective technology for utilizing low-grade renewable energy. In order to improve the economy of the application of cascade heat pump in the printing and dyeing industry, a cascade high-temperature heat pump model suitable for industrial waste heat recovery and reuse was constructed based on the thermodynamic cycle analysis. Taking the heating load per unit total cost as the optimization objective, considering the thermal economic cost and system performance, the optimization design of the combined parameters of evaporation and condensation temperature was carried out through the mathematical analysis. Results show that for the optimal refrigerant combination of R152a/R245fa, the optimization of evaporation temperature can increase the heating load per unit total cost by about 14.5% at the condensation temperature of 370.41 K. Under the condition of evaporation temperature of 297.43 K, the optimization of condensation temperature can increase the heating load per unit total cost by about 24%, and the maximum heating load per unit total cost reaches 2.84 W/（yuan·a）. In addition, the thermoeconomic objective is affected by the heating coefficient and the specific heating rate, and there exists optimal combination of the heating coefficient and the specific heating rate, which maximizes the unit cost heat load.

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waste heat recovery / heat pump / thermoanalysis / cascade high-temperature heating / thermo-economical optimization / optimal temperature parameters

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Shi Guohua, Wang Ziang, Gao Yuqi, Zhao Yuetian, Liu Bo. OPTIMIZATION OF TEMPERATURE DESIGN PARAMETERS OF CASCADE HIGH-TEMPERATURE HEAT PUMP BASED ON THERMAL ECONOMIC ANALYSIS[J]. Acta Energiae Solaris Sinica. 2025, 46(2): 218-225 https://doi.org/10.19912/j.0254-0096.tynxb.2023-1625

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