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Experimental study of an air source transcritical CO2 heat pump with indirect dedicated mechanical subcooling for space heating applications
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DOI：10.1016/j.tsep.2026.104824.png)
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Abstract
En 中文
• Indirect dedicated mechanical subcooling (IDMS) evaluated in a CO2 heat pump. • IDMS improves performance if the base system operates under low efficiency conditions. • COP improves up to 5.7% at temperatures above 45°C, little gain or degradation below. • Gas cooler pressure reductions between 3.9 and 11.4% found at temperatures below 55°C. • Compressor discharge temperature reduction in all conditions studied.
Keywords:
Transcritical heat pump
CO2
Mechanical subcooling
Internal heat exchanger
Energy efficiency
Space heating
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