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Application of Natural Refrigerants in Refrigeration Plants
Chemical and Petroleum Engineering (English Translation of Khimicheskoe I Neftyanoe Mashinostroenie), 2023M. S. Talyzin, V. G. Ponomarev
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Efficiency of Refrigeration Equipment on Natural Refrigerants
Chemical and Petroleum Engineering, 2020A comparative investigation of losses in refrigeration plants applied in the food industry was carried out using the natural refrigerants CO2 and refrigerant grade propane (R290) at two working temperature levels (evaporation temperature minus 35°С and minus 10°С) using entropic and statistical analysis methods.
V. V. Shishov, M. S. Talyzin
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Mechanical Engineering, 1998
This article explains that substances such as air, water, ammonia, hydrocarbons, and carbon dioxide may provide solutions to the problem of finding environmentally acceptable refrigerants. The search for new and environmentally benign refrigerants to replace the existing chlorofluorocarbons (CFC) and hydrochlorofluorocarbons (HCFC) has led to the ...
Yunho Hwang +2 more
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This article explains that substances such as air, water, ammonia, hydrocarbons, and carbon dioxide may provide solutions to the problem of finding environmentally acceptable refrigerants. The search for new and environmentally benign refrigerants to replace the existing chlorofluorocarbons (CFC) and hydrochlorofluorocarbons (HCFC) has led to the ...
Yunho Hwang +2 more
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Performance Experiment of Natural Refrigerant Cascaded Refrigeration System
Advanced Materials Research, 2011In this paper, the performances of natural refrigerant R290/CO2 cascaded refrigeration system using R290 as high temperature cycle refrigerant and CO2 as low temperature cycle refrigerant were investigated experimentally. The test results show that both CO2 compressor and R290 compressor start up stably and present good running performance.
Jing Hong Ning, Sheng Chun Liu
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Status of Enhanced Heat Transfer in Systems With Natural Refrigerants [PDF]
Journal of Thermal Science and Engineering Applications, 2010 Paper presented at the 7th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Turkey, 19-21 July, 2010.Global environmental and energy concerns have prompted the heating, ventilating, air-conditioning and refrigeration (HVAC&R)
Ayub, Zahid
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A Review Paper on Natural and Synthetic Refrigerants
International Journal of Innovative Research in Engineering & Management, 2022The Montreal Protocol (1987) prohibited halogenated hydrocarbons with a high ozone depletion potential (ODP) because of their harmful effects on the ozone layer, which protects the earth from UV radiation. The greenhouse gases (GHG) utilized in contemporary refrigeration, air conditioning, and heat-pumping systems are subject to a time-limited permit ...
Pooran Singh, Dr. Jitendra
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Investigation on the fractional nature of a refrigeration evaporator
Applied Thermal Engineering, 2020Abstract The frequency response of an evaporator for commercial refrigeration is investigated to develop a control-oriented model which balances simplicity with accuracy. The dynamics of such devices is highly nonlinear; the response curve was experimentally identified around an operating point by recording the output of the system for several ...
Casagrande D. +4 more
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Azeotropy in the natural and synthetic refrigerant mixtures
International Journal of Refrigeration, 2007Abstract A novel approach for the prediction of azeotrope formation in a mixture that does not require vapour–liquid equilibrium calculations is developed. The method employs neural networks and global phase diagram methodologies to correlate azeotropic data for binary mixtures based only on critical properties and acentric factor of the individual ...
Sergey Artemenko, Victor Mazur
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Application of Natural Zeolites in Refrigeration
1985Publisher Summary Silica gels, activated alumina, and synthetic zeolites are commonly used in the refrigeration industry mainly for the purpose of desiccation of halocarbon refrigerants. However, natural zeolites cannot be used in refrigeration systems as mined and crushed.
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Equations for Thermal Conductivity of Natural Refrigerants
International Journal of Thermophysics, 2001Experimental results for the thermal conductivity of ammonia, propane, butane, isobutane, and propylene are reviewed, with special attention given to the liquid phase. New equations for the thermal conductivity of these five substances applicable for practical use over wide ranges of temperature and pressure including the critical region are proposed ...
J. Yata, M. Hori, Y. Isono, Y. Ueda
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