Zhaoyang Yuan , Jintao He , Yonghao Zhang , Yu Yao , Hua Tian , Lingfeng Shi , Gequn Shu
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Improving the efficiency of a CO2 heat pump for simultaneous heating and cooling coupled with an ambient source
The CO2 heat pump for simultaneous heating and cooling (CO2 HPS) is an efficient technology capable of providing both heating and cooling within a single system. With its high energy efficiency and low carbon emissions, the CO2 HPS has attracted growing attention in both industry and academia. However, the basic CO2 HPS does not effectively balance the heating and cooling output with the actual load demands, leading to unnecessary energy waste and lower overall system efficiency. To address this issue, this paper proposes four new configurations that introduce ambient sources to regulate the heating and cooling supply-demand balance, while also improving the system structure through the integration of heat recovery and ejector-based loops. These enhancements enable the unit to flexibly and efficiently adjust heating and cooling output according to actual load requirements. The results show that, compared to the basic configuration, the overall coefficient of performance of the four new configurations increases by 0∼14.69 %, 2.77∼19.81 %, 5.66∼17.70 %, and 0.61∼8.40 %, respectively.
期刊介绍:
The International Journal of Refrigeration is published for the International Institute of Refrigeration (IIR) by Elsevier. It is essential reading for all those wishing to keep abreast of research and industrial news in refrigeration, air conditioning and associated fields. This is particularly important in these times of rapid introduction of alternative refrigerants and the emergence of new technology. The journal has published special issues on alternative refrigerants and novel topics in the field of boiling, condensation, heat pumps, food refrigeration, carbon dioxide, ammonia, hydrocarbons, magnetic refrigeration at room temperature, sorptive cooling, phase change materials and slurries, ejector technology, compressors, and solar cooling.
As well as original research papers the International Journal of Refrigeration also includes review articles, papers presented at IIR conferences, short reports and letters describing preliminary results and experimental details, and letters to the Editor on recent areas of discussion and controversy. Other features include forthcoming events, conference reports and book reviews.
Papers are published in either English or French with the IIR news section in both languages.