Anti-frosting strategies of air source heat pump derived from homogenizing the uneven surface temperature of outdoor coils

Physics of Fluids, Journal Year: 2025, Volume and Issue: 37(3)

Published: March 1, 2025

In actual operation of an air source heat pump unit, the outdoor coils generally showcase uneven surface temperature distribution, and this leads to frosting. Homogenizing frosting has been demonstrated be helpful for anti-frosting. study, two strategies, i.e., airflow regulation refrigerant flow regulation, were proposed tackle issue. Experimental tests with a newly designed exchanger conducted demonstrate these strategies. The experimental results depicted in semi-experimental evaluation plot, which anti-frosting potential quantitatively clarified. Specifically, by implementing critical could reduced 1.6 °C, relative humidity 4%–8%, respectively. Such optimization can significantly reduce annual accumulated duration. detail, duration decreased nearly 50% Hohhot, Urumqi, Xining; 35%–40% Beijing Lhasa, greater than 55% Kunming; 45% Wuhan 80% Shanghai. Baise, may avoided during throughout year. findings study provide some useful clues design pumps different climatic regions.

Language: Английский

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Year-round energy-efficient multi-stage fresh air treatment system utilizing lake water as energy source

Renewable Energy, Journal Year: 2025, Volume and Issue: unknown, P. 123089 - 123089

Published: April 1, 2025

Language: Английский

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Experimental study of a novel integrated heating terminal with three-fluid heat exchanger and gravity heat pipe

Energy and Buildings, Journal Year: 2025, Volume and Issue: unknown, P. 115728 - 115728

Published: April 1, 2025

Language: Английский

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Grade-matched air humidification to reduce the required heating-source temperature and capacity

Sustainable Energy Technologies and Assessments, Journal Year: 2025, Volume and Issue: 77, P. 104340 - 104340

Published: April 26, 2025

Language: Английский

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