Performance of a scroll compressor with vapor-injection and two-stage reciprocating compressor operating under extreme conditions |
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| Affiliation: | 1. Interstate University of Applied Sciences Buchs, Institute for Energy Systems, Werdenbergstrasse 4, 9471 Buchs, Switzerland;2. School of Mechanical Engineering, Ray W. Herrick Laboratories, Purdue University, 177 S. Russell Street, West Lafayette, IN 47907, USA;1. Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai 200240, China;2. Shanghai Aircraft Design and Research Institute, Shanghai 201210, China;1. Applied Thermodynamics Laboratory, Aerospace and Mechanics Department, University of Liège, Allée de la découverte 17, Liège 4000, Belgium;2. Instituto Universitario de Investigación en Ingeniería Energética, Universitat Politècnica de València, Camino de Vera, s/n, Valencia 46022, Spain |
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| Abstract: | The current paper presents a comparative study between a scroll compressor with vapor-injection (SCVI) and a two-stage reciprocating compressor (TSRC) operating under extreme conditions. The present work is divided into two parts: in the first part, both compressors are compared in terms of compressor efficiency, volumetric efficiency, coefficient of performance (COP), and cooling capacity with R407C refrigerant; in the second part, the seasonal performances of both compressors working in cooling and heating modes are estimated and analyzed. Results show that the SCVI presents better efficiency and COP than the TSRC for pressure ratios below 7.5. This compressor can be used in air conditioning systems and heat pumps which work under moderate temperature conditions. For higher pressure ratios, the TSRC has better efficiency which subsequently gives higher COP. This type of compressor is more suited to be used in sanitary hot water systems operating in harsh climates and in low-temperature freezing systems (under −20°C). |
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