Results 131 to 140 of about 724 (168)
Some of the next articles are maybe not open access.
Experimental investigation of the performance of an R1270/CO2 cascade refrigerant system
International Journal of Refrigeration, 2020Abstract Herein, we proposed a cascade refrigerant system with R1270 and carbon dioxide refrigerants. The natural refrigerant R1270 was adopted in the high-temperature circuit to replace NH3 and R290. A prototype cascade refrigerant system with two semi-hermetic piston compressors was manufactured, and its performance was investigated experimentally.
Yongning He, xuehong wu
exaly +2 more sources
Energy Conversion and Management, 2022
Ejector expansion refrigeration systems have gained prominence in the refrigeration sector, providing much better thermodynamic performance than conventional refrigeration systems. The present work aims to improve the thermodynamic performance of a booster assisted ejector expansion vapour compression refrigeration system with constant area mixing ...
Cenker Aktemur, Ilhan Tekin Öztürk
exaly +3 more sources
Ejector expansion refrigeration systems have gained prominence in the refrigeration sector, providing much better thermodynamic performance than conventional refrigeration systems. The present work aims to improve the thermodynamic performance of a booster assisted ejector expansion vapour compression refrigeration system with constant area mixing ...
Cenker Aktemur, Ilhan Tekin Öztürk
exaly +3 more sources
Performance of R170/R1270 mixture under air-conditioning and heat pumping conditions
Journal of Mechanical Science and Technology, 2010In this study, the performance of R170/R1270 mixture was measured on a heat pump bench tester to substitute for R22. The tester was equipped with a hermetic compressor providing a nominal capacity of 3.5 kW. All tests were conducted under typical summer and winter conditions of 7/45°C and −7/41°C in the evaporator and condenser, respectively.
Ki-Jung Park, Yohan Lee, Dongsoo Jung
exaly +2 more sources
Experimental performance study of a small wall room air conditioner retrofitted with R290 and R1270
International Journal of Refrigeration, 2012An original R22 wall room air conditioner with a cooling capacity of 2.4 kW and energy efficiency ratio (EER) of 3.2 is retrofitted with a compressor of a 20% larger displacement to charge R290 and R1270 for performance experiments. The results show that for R1270, only adopting a same kind mineral lubricant of higher viscosity would supply 2.4% higher
J.H. Wu, L.D. Yang, J. Hou
exaly +2 more sources
Energy Conversion and Management, 2014
Abstract In this paper natural refrigerant propylene (R1270) has been proposed for transcritical cascade refrigeration system and analyzed. Propylene is used in the low temperature (LT) cycle and carbon dioxide is used in the high temperature (HT) cycle of the cascade transcritical refrigeration system. The proposed transcritical cascade cycle can be
Alok Manas Dubey, Suresh Kumar
exaly +2 more sources
Abstract In this paper natural refrigerant propylene (R1270) has been proposed for transcritical cascade refrigeration system and analyzed. Propylene is used in the low temperature (LT) cycle and carbon dioxide is used in the high temperature (HT) cycle of the cascade transcritical refrigeration system. The proposed transcritical cascade cycle can be
Alok Manas Dubey, Suresh Kumar
exaly +2 more sources
International Journal of Refrigeration, 2019
Abstract This work evaluates the thermodynamic performance of three different mixed refrigerants: R744/R1270, R744/R717 and R744/RE170 in a cascade refrigeration system composed of two vapor compression cycles. Mixture composition and condensation temperature of the cascade heat exchanger were used as inputs in a parametric analysis, while outputs ...
Jose Dangelo
exaly +2 more sources
Abstract This work evaluates the thermodynamic performance of three different mixed refrigerants: R744/R1270, R744/R717 and R744/RE170 in a cascade refrigeration system composed of two vapor compression cycles. Mixture composition and condensation temperature of the cascade heat exchanger were used as inputs in a parametric analysis, while outputs ...
Jose Dangelo
exaly +2 more sources
International Journal of Refrigeration, 2021
Abstract The present paper concerns an experimental investigation about the heat transfer coefficient during convective condensation of hydrocarbons and their zeotropic mixtures. Experiments were performed in a horizontal smooth channel, with internal diameter of 9.43 mm for R600a, R290, R1270, R600a/R290 (70/30 molar fraction) and R600a/R1270 (75/25
Tiago Augusto Moreira +2 more
openaire +1 more source
Abstract The present paper concerns an experimental investigation about the heat transfer coefficient during convective condensation of hydrocarbons and their zeotropic mixtures. Experiments were performed in a horizontal smooth channel, with internal diameter of 9.43 mm for R600a, R290, R1270, R600a/R290 (70/30 molar fraction) and R600a/R1270 (75/25
Tiago Augusto Moreira +2 more
openaire +1 more source
Experimental study on the solubility of Propylene (R1270) in PAG, POE and AB lubricants
International Journal of RefrigerationQinying Hou +4 more
exaly +2 more sources