Author:
Rangel Victor Bitencour,Almeida Antonio Gabriel Souza,Almeida Francisco Souza,Duarte Luiz Gustavo da Cruz
Abstract
Cascade refrigeration systems work with two or more serial disposed cycles and can obtain internal temperatures below -60°C, which is necessary for several activities in medicine and scientific research. This paper presents a thermodynamic analysis of cascade system refrigeration using natural refrigerant fluids for ultra low temperatures. These fluids areenvironmentally friendly refrigerant and are an alternative to hydro chlorofluorocarbons (HCFCs) and to hydrofluorocarbons (HFCs). Energy and exergy analyses were performed using a thermodynamic model based on the law of conservation of massand also on the first and second laws of thermodynamics. A simulator was developed to assess the technical practicability of this system, considering it running as a real refrigeration cycle.
Publisher
South Florida Publishing LLC
Reference16 articles.
1. Park, H.; Kim, D. H.; Kim M. S., Thermodynamic analysis of optimal intermediate temperature in R134a-R410A cascade refrigeration systems and its experimental verification.Applied Thermal Engineering 54: 319-327, 2013.
2. Bayrakçi, H.C.; Özgür, A. E., Energy and exergy analysis of vapor compression refrigeration system using pure hydrocarbon refrigerants.International Journal of Energy Research 33: 1070-1075, 2009.
3. Ahamed, J. U.; Saidur, R.; Masjuki, H. H., A review on exergy analysis of vapor compression refrigeration system. Renewable and Sustainable Energy Reviews 15: 1593-1600, 2011.
4. Alhamid, M Idrus; Syakra, Darwin R.B.; Nasruddin.,Exergy and energy analysis of a cascade refrigeration system using R744+R170 for low temperature applications. International Journal of Mechanics and Mechatronics Engineering 10, 2010
5. Aminyavari M.; Najafi B.; Shirazi A.; Rinaldi F., Exergetic, economic and environmental (3E) analyses and multi-objective optimization of a CO2/NH3 cascade refrigeration system. Applied Thermal Engineering 65 : 42-50, 2014.