Author
Qi Haifeng
Bio: 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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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).
105 citations
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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...
75 citations
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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.
57 citations
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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.
36 citations
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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.
7 citations
Cited by
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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...
75 citations
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TL;DR: In this paper, a novel integrated system consisting of a high-temperature heat pump providing 120-130°C heat and a gas separation unit was developed to recover the industrial waste heat and replace the low-pressure steam used in traditional refinery process.
58 citations
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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.
57 citations
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TL;DR: The use of an expansion energy recovery ejector has been given great concern owing to virtues of no moving elements, cost-effectiveness, high reliability, and comparable efficiency as mentioned in this paper.
55 citations
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TL;DR: In this paper, the authors investigated two pressure swing distillation (PSD) processes with different separation order where the W-A-I separation sequence has a better performance in economy, energy consumption and environment.
50 citations