期刊
ENERGIES
卷 15, 期 14, 页码 -出版社
MDPI
DOI: 10.3390/en15144973
关键词
CFD approach; Tesla turbine; heat pump cycle; exergy efficiency; exergy loss
资金
- Collaborative Research and Development (CRD) Grants Program at Universite de Sherbrooke
- Natural Sciences and Engineering Research Council of Canada
- Hydro-Quebec
- Rio Tinto
- Canmet ENERGY Research Center of Natural Resources Canada [RDCPJ451917-13]
- New Brunswick Innovation Foundation (NBIF) [RIF2018-025]
- Faculte des Etudes Superieures et de la Recherche (FESR) of the Universite de Moncton
Heat pump system is widely used due to its advantages of high energy efficiency, reliability, and environmental impact. However, the major drawback of the system is the exergy loss during the isenthalpic process in the expansion valve. This paper investigates the integration of Tesla turbine exergy analysis with the heat pump system to reduce exergy losses and increase coefficient of performance and exergy efficiency.
The heat pump system has been widely used in residential and commercial applications due to its attractive advantages of high energy efficiency, reliability, and environmental impact. The massive exergy loss during the isenthalpic process in the expansion valve is a major drawback of the heat pump system. Therefore, the Tesla turbine exergy analysis in terms of transiting exergy efficiency is investigated and integrated with the transcritical heat pump system. The aim is to investigate the factors that reduce exergy losses and increase the coefficient of performance and exergy efficiency. The contribution of this paper is twofold. First, a three-dimensional numerical analysis of the supercritical CO2 flow simulation in the Tesla turbine in three different geometries is carried out. Second, the effect of the Tesla turbine on the coefficient of performance and exergy efficiency of the heat pump system is investigated. The effect of the rotor speed and disk spacing on the Tesla turbine power, exergy loss, and transiting exergy efficiency is investigated. The results showed that at a lower disk spacing, the turbine produces higher specific power and transiting exergy efficiency. In addition, the coefficient of performance (COP) and exergy efficiency improvement in the heat pump system combined with the Tesla turbine are 9.8% and 28.9% higher than in the conventional transcritical heat pump system, respectively.
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