Application and development of CO2 transcritical cycle heat pumps

doi:10.3969/j.issn.2097-0706.2023.04.002

Abstract

Abstract:

Under the background of carbon peaking and carbon neutrality，the application of heat pumps with natural working medium CO₂ as refrigerant is more in line with the new requirements of green development and environmental protection.Comparing the status of overseas and domestic researches on CO₂ heat pumps in different scenarios，it is found out that CO₂ emissions from a CO₂ heat pump water heater is 40% lower than that from a traditional electric water heater.The most prominent advantage of a CO₂ heat pumps is the significant temperature rise which leads to high working efficiency.In low outdoor temperatures，CO₂ heat pumps can satisfy the hot water demands of users along railways and in rural areas of northern China with high annual energy efficiency ratios. CO₂ on-board air conditioners have been developed and basically into mass production.Compared with a traditional electric dryer，a CO₂ heat pump dryer can save energy by 55% at most.CO₂ heat pump technology will be a hot spot in the future research on environmental protection and low-carbon technologies， and will play a key role in China's "dual carbon" target.

Key words: CO₂ heat pump, transcritical cycle, heating, refrigerant, carbon neutrality

CLC Number:

TK01

LI Minxia, HOU Beiran, WANG Pai, DONG Liwei, TIAN Hua. Application and development of CO₂ transcritical cycle heat pumps[J]. Integrated Intelligent Energy, 2023, 45(4): 12-18.

Figures/Tables 6

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References 30

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项目	常规HCFC热泵	CO₂热泵
热水温度/℃	约100	约55
换热过程	潜热换热	显热换热
低温制热水能力	衰减快	稳定可靠
换热效率	低	高

Application and development of CO₂ transcritical cycle heat pumps

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