Results 81 to 90 of about 368 (107)
Development of miscibility improved oil for R32
, 2018 R32 has been widely applied as an air-conditioner refrigerant. It is known that R32 is inferior to other refrigerants such as HFC and HFO in the miscibility with refrigeration oils. In addition, when R32 dissolves in refrigeration oils, the kinematic viscosity of the oils reduces remarkably.
Mizutani, Yuya +3 more
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Evaporation Heat Transfer of R32 inside Horizontal Tubes
Zhileng xuebao, 2017 This paper studies the evaporation heat transfer of R32 inside two different diameters of horizontal tubes under saturation temperatures of 0 ℃, 5 ℃, and 10 ℃. The evaporation heat transfer coefficient of the refrigerant was obtained by using a heat resistance separating method.
Li Qingpu +5 more
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Energy Efficiency of a Chiller Using R410A or R32
, 2014 An advanced simulation model of a packaged air cooled water chiller was developed. The nominal cooling capacity of the chiller is about 70 kW at 35°C dry bulb outdoor air temperature, and it consists of a single refrigerating circuit with two identical scroll compressors.
Bachir BELLA +3 more
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ВЯЗКОСТЬ И ТЕПЛОПРОВОДНОСТЬ СМЕСИ ХЛАДАГЕНТОВ R32/R134а
Технические газы, 2016 openaire +2 more sources
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Surface Tension and Liquid Viscosity of R32+R1234yf and R32+R1234ze
Journal of Chemical & Engineering Data, 2016The surface tension and liquid viscosity of two binary refrigerant mixtures 1,1,1,2-tetrafluoroethane (R32) (1) + 2,3,3,3-tetrafluoroprop-1-ene (R1234yf) (2) and R32 (1) + trans-1,3,3,3-tetrafluoroprop-1-ene (R1234ze) (2) have been measured from 293 K to the critical point by using the surface light scattering (SLS) method.
Junwei Cui +3 more
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Solid–liquid equilibria for the CO2+N2O, CO2+R32, and N2O+R32 systems
Fluid Phase Equilibria, 2007Abstract Evaluating the solid–liquid equilibrium and the eutectic composition of a mixture is fundamental for the estimation of the lowest temperature at which the blend can be used as a refrigerant fluid. The study on the solid–liquid equilibrium for some selected systems was undertaken to fill the gap in the literature on the solid–liquid ...
Giovanni Di Nicola +3 more
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Investigation of Heat Pump Efficiency on Zeotropic Refrigerants R32/R134a and R32/R152a
Journal of Engineering Thermophysics, 2018Results of analysis of thermodynamic cycle efficiency with consideration of nonisothermal nature of phase transition indicate that when using the mixture of R32/R152a (30/70%) in the vapor compression heat pumps, the coefficient of performance is up to 4% higher in comparison with R32/R134a (30/70%).
N. N. Mezentseva, I. V. Mezentsev
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Thermodynamic properties of R32 + R134a and R125 + R32 mixtures in and beyond the critical region
International Journal of Refrigeration, 1998Abstract A parametric crossover equation of state for pure fluids is adapted to binary mixtures. This equation incorporates scaling laws asymptotically close to the critical point and is transformed into a regular classical expansion far away from the critical point.
S.B Kiselev, M.L Huber
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Measurements of isobaric heat capacity of R32
International Journal of Refrigeration, 2012Abstract The specific isobaric heat capacity ( c p ) was measured for R32 (difluoromethane) in the gas phase. Thirty-two measurements for R32 were obtained at temperatures from 274 to 353 K and at pressures from 0.65 to 2.4 MPa. Some of them are close to the saturation curve.
Noboru Kagawa +3 more
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