Environmental and economical analyses of transcritical CO2 heat pump combined with direct dedicated mechanical subcooling (DMS) for space heating in China
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).
About: This article is published in Energy Conversion and Management.The article was published on 2019-10-15. It has received 105 citations till now. The article focuses on the topics: Heat pump & Transcritical cycle.
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
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
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
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
References
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TL;DR: In this article, a new general correlation for forced convection boiling has been developed with the aid of a large data bank consisting of over 4300 data points for water, refrigerants and ethylene glycol, covering seven fluids and 28 authors.
1,050 citations
TL;DR: In this article, the authors present recent developments and state-of-the-art for transcritical CO2 cycle technology in various refrigeration, air-conditioning and heat pump applications, including discussion of properties and characteristics of CO2, cycle fundamentals, methods of high-side pressure control, thermodynamic losses, cycle modifications, component/system design, safety factors, and promising application areas.
656 citations
TL;DR: In this article, a correlation for fin-and-tube heat exchanger having plain fin geometry is proposed, which can describe 88.6% of the database within ±15%.
417 citations
TL;DR: The ideal refrigeration or heat pump cycle for a given purpose is defined by the boundary conditions of the application and is completely independent of the refrigerant used as mentioned in this paper, and the real cycle should approach the theoretical ideal as closely as practically possible.
Abstract: The ideal refrigeration or heat pump cycle for a given purpose is defined by the boundary conditions of the application and is completely independent of the refrigerant used. The real cycle should approach the theoretical ideal as closely as practically possible. The thermodynamic and heat transfer properties of the refrigerant are important in this respect. Natural substances such as ammonia, propane and carbon dioxide are often better than the present halocarbons in this regard. By using simple methods of safety it is possible to use these three natural fluids for practically all conventional refrigeration and heat pump systems.
387 citations