Optimal heat rejection pressure of CO2 heat pump water heaters based on pinch point analysis

•The pinch effect considerably affects the optimal heat rejection pressure.•The optimal heat rejection pressure was underestimated by the commonly used model.•A new correlation of optimal pressure is proposed for CO2 heat pump water heaters. The control of heat rejection pressure is of great importa...

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Vydané v:	International journal of refrigeration Ročník 106; s. 592 - 603
Hlavný autor:	Chen, Yun-Guang
Médium:	Journal Article
Jazyk:	English
Vydavateľské údaje:	Paris Elsevier Ltd 01.10.2019 Elsevier Science Ltd
Predmet:	Carbon dioxide Chauffe-eau à pompe à chaleur Computer simulation Cycle au CO2 transcritique Gas cooling Heat exchangers Heat pump water heater Heat pumps Heat transfer Impact analysis Optimal heat rejection pressure Parameter sensitivity Pinch effect Pinch point Point de pincement Pression optimale de rejet de chaleur Pressure effects Pumps Rejection Sensitivity analysis Temperature gradients Transcritical CO2 cycle Water heaters Water temperature Heat pump water heater Point de pincement Pression optimale de rejet de chaleur Chauffe-eau à pompe à chaleur Optimal heat rejection pressure Pinch point Transcritical CO2 cycle Cycle au CO2 transcritique
ISSN:	0140-7007, 1879-2081
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