Q
Qi Haifeng
Researcher at Tianjin University of Commerce
Publications - 14
Citations - 296
Qi Haifeng is an academic researcher from Tianjin University of Commerce. The author has contributed to research in topics: Gas compressor & Subcooling. The author has an hindex of 5, co-authored 14 publications receiving 157 citations.
Papers
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Journal ArticleDOI
Environmental and economical analyses of transcritical CO2 heat pump combined with direct dedicated mechanical subcooling (DMS) for space heating in China
Baomin Dai,Qi Haifeng,Shengchun Liu,Zhifeng Zhong,Hailong Li,Hailong Li,Mengjie Song,Muyu Ma,Zhili Sun +8 more
TL;DR: In this paper, an environmental and economical assessment model is developed, in order to evaluate the performances of transcritical CO2 heat pump system with dedicated mechanical subcooling (CO2 HPDMS).
Journal ArticleDOI
Evaluation of transcritical CO2 heat pump system integrated with mechanical subcooling by utilizing energy, exergy and economic methodologies for residential heating
Baomin Dai,Qi Haifeng,Shengchun Liu,Muyu Ma,Zhifeng Zhong,Hailong Li,Hailong Li,Mengjie Song,Zhili Sun +8 more
TL;DR: In this paper, a transcritical CO 2 heat pump (HP) system for residential space heating integrated with direct dedicated mechanical subcooling (DMS) is proposed, and mathematical models are developed to study the...
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Life cycle energy, emissions and cost evaluation of CO2 air source heat pump system to replace traditional heating methods for residential heating in China: System configurations
Baomin Dai,Qi Haifeng,Dou Wanbin,Shengchun Liu,Dan Zhong,Yang Haining,Victor Nian,Victor Nian,Ying Hao +8 more
TL;DR: In this paper, a new configuration of CO2 heat pump system integrated with vapor injection and dedicated mechanical subcooling (VIDMS) is proposed, and compared with five configurations of CO 2 heat pump systems and three traditional heating methods.
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Performance analysis of two-stage compression transcritical CO2 refrigeration system with R290 mechanical subcooling unit
TL;DR: In this article, the thermal performance of a two-stage compression transcritical CO2 refrigeration system with R290 mechanical subcooling unit was evaluated under the optimal sub-cooling temperature and compressor discharge pressure.
Journal ArticleDOI
A new correlation for carbon dioxide boiling heat transfer coefficient outside evaporating tubes
Shengchun Liu,Qi Haifeng,Victor Nian,Victor Nian,Bin Liu,Baomin Dai,Zhili Sun,Xueqiang Li,Jun Yuan +8 more
TL;DR: In this paper, theoretical and experimental investigations are carried out for a smooth and three mechanically enhanced tubes under heat flux values ranging from 10 to 50 kWm−m−2 and evaporating pressures ranging from 2 to 4 MPa.