Experimental evaluation of the internal heat exchanger influence on a vapour compression plant energy efficiency working with R22, R134a and R407C |
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| Affiliation: | 1. Department of Technology, Campus de Riu Sec, University Jaume I, E-12071 Castellón, Spain;2. Department of Applied Thermodynamics, Camino de Vera, 14, Polytechnic University of Valencia, E-46022 Valencia, Spain;1. Department of Mechanical Engineering, Engineering Division, Campus Irapuato-Salamanca, University of Guanajuato, Salamanca, Gto., C.P. 36885, Mexico;2. Department of Metal-Mechanical, Technological University of Guanajuato Southwest, Valle-Huanimaro Km. 1.2, Valle de Santiago, Gto., Mexico;3. Faculty of Mechanical Engineering, Edif. W, CU, UMSHN. Morelia, Michoacán, C.P. 58030, Mexico;1. Department of Mechanical Engineering, Kumoh National Institute of Technology, 61 Daehak-ro, Gumi, Gyeongbuk 730-701, South Korea;2. Department of Mechanical and Nuclear Engineering, The Pennsylvania State University, 204 Reber Building, University Park, PA 16802-1412, USA;1. Advanced Energy and Technology, Korea Institute of Industrial Technology Campus, Korea University of Science and Technology, Cheonan 31056, Republic of Korea;2. Thermal&Fluid System Group, Korea Institute of Industrial Technology, Cheonan 31056, Republic of Korea;1. Department of Advanced Environmental Science and Engineering, Faculty of Engineering Sciences, Kyushu University, Kasuga-koen 6-1, Kasuga-city, Fukuoka 816-8580, Japan;2. Research Center for Next Generation Refrigerant Properties (NEXT-RP), International Institute of Carbon-Neutral Energy Research (I2CNER), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan |
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| Abstract: | Internal or liquid-suction heat exchangers are used in many refrigeration and air conditioning systems based on the vapour compression cycle, with the basic objective of assuring the entrance of refrigerant in liquid phase to the expansion device. This purpose is achieved by exchanging energy between the cool gaseous refrigerant leaving the evaporator and warm liquid refrigerant exiting the condenser. These devices can have positive or negative influences on the plant overall energy efficiency, depending on the working fluid and the operating conditions. In this paper the experimental results obtained from a refrigeration test facility with and without the presence of an internal heat exchanger, using R22, R134a and R407C as working fluids, are presented and analyzed, including the impact of pressure drops and variations of refrigerant mass flow rate. A comparison between experimental and theoretical results is also enclosed. |
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