Collaborative optimization of cycle configuration and mixed refrigerants for very-high-temperature heat pump:A conception for industrial heat consumption
Industrial very-high-temperature heat pumps are gradually becoming a new direction for the development of heat pump technology.Unlike existing civil based air source heat pumps,industrial heat consumption has complex temperature rise and tem-perature span conditions,with significant differences.To improve the energy efficiency,new perspectives and methods must be adopted.In response to this,a collaborative opti-mization approach of cycle configuration and mixed refrigerants is proposed.Firstly,based on the cascade-coupling-heating heat pump cycle,the cycle configuration is quantified;the important influence of the bubble dew point temperature difference effect of mixed refrig-erants under large temperature difference conditions is analyzed.Subsequently,the case analysis is conducted to verify that the optimal COPh optimized through collaborative opti-mization of cycle configuration and mixed refrigerants increases by 22.0％and 5.8％re-spectively,compared to the COPh optimized through traditional mixed refrigerants matc-hing or cycly configuration screening.
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