Author
Zhifeng Zhong
Bio: Zhifeng Zhong is an academic researcher. The author has contributed to research in topics: Heat pump & Transcritical cycle. The author has an hindex of 4, co-authored 4 publications receiving 145 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
TL;DR: Using air source heat pump system for residential heating is a practical way to replace coal-fired boiler in China to alleviate the haze problem, and CO2 is a promising candidate to replace hydroch...
78 citations
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
TL;DR: In this article, an experimental setup is developed to study the thermal performance of the transcritical CO2 air source heat pump system used for space heating, and the test results show that a maximum coefficient of performance (COP) of 2.88 is obtained at the optimum discharge pressure and the ambient temperature of 10 °C.
10 citations
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TL;DR: In this article, the authors present an extensive review of previous works on several aspects of heat pumps, including their role in the decarbonisation of the heating sector, and their roles in terms of adding flexibility to renewable-rich systems and carbon abatement are examined.
Abstract: Addressing the growing concerns of climate change necessitates the decarbonisation of energy sectors globally. Heating is the largest energy end-use, accounting for almost half of total energy consumption in most countries. This paper presents an extensive review of previous works on several aspects of heat pumps, including their role in the decarbonisation of the heating sector. In addition, themes related to recent technological advances of heat pumps, as well as, their roles in terms of adding flexibility to renewable-rich systems and carbon abatement are examined. Challenges and barriers facing large-scale deployment of heat pumps are identified. Generally, as the share of renewables in the energy mix increases, heat pumps can play a role in addressing a multitude of problems induced by climate change. The potential of heat pumps to abate emissions, however, is highly dependent on the type of technology, location and electricity mix. Heat pumps can be a source of flexibility in the power system and can upgrade waste heat to provide low-cost heating in district heating networks. They are environment friendly and provide a viable pathway for decarbonising the heating sector. However, economic, regulatory, structural and infrastructural barriers exist, which may hinder heat pump integration rate.
124 citations
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
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
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
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