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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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International Journal of Refrigeration, 1999
Abstract A practical representation for the transport coefficients of pure refrigerants R32, R125, R134a, and R125+R32 mixtures is presented which is valid in the vapor–liquid critical region. The crossover expressions for the transport coefficients incorporate scaling laws near the critical point and are transformed to regular background values far ...
S.B Kiselev, R.A Perkins, M.L Huber
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Abstract A practical representation for the transport coefficients of pure refrigerants R32, R125, R134a, and R125+R32 mixtures is presented which is valid in the vapor–liquid critical region. The crossover expressions for the transport coefficients incorporate scaling laws near the critical point and are transformed to regular background values far ...
S.B Kiselev, R.A Perkins, M.L Huber
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Advanced Materials Research, 2012
A general air-source heat pump water heater originally designed to work with R134a was reconstructed as experimental rig for performance studies on systems using different refrigerants including R32, R134a and the mixture of R32/R134a which mass ratio is 1:5.
De Feng Ding +4 more
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A general air-source heat pump water heater originally designed to work with R134a was reconstructed as experimental rig for performance studies on systems using different refrigerants including R32, R134a and the mixture of R32/R134a which mass ratio is 1:5.
De Feng Ding +4 more
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Hazard evaluation of R32/R1234ze(E) cloud explosion
International Journal of Refrigeration, 2020Abstract This paper is aimed at evaluating characteristics of R32/R1234ze(E) cloud explosion. The flame morphologies and explosion pressure are obtained experimentally and the laminar burning velocity is analyzed thermally and chemically. The results indicated that with the increase of equivalence ratio, the limiting oxygen content of xE=10 ...
Qixuan Liu +5 more
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International Journal of Thermophysics, 2008
The isochoric heat capacity (cv) of difluoromethane (R32) and a mixture of 51.11 mass% R32 + 48.89 mass% pentafluoroethane (R125) was measured at temperatures from 268 K to 328 K and at pressures up to 30 MPa. The reported density measurements are in the single-phase region and cover a range of ρ > 800 kg · m−3.
A. Matsuguchi, K. Yamaya, N. Kagawa
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The isochoric heat capacity (cv) of difluoromethane (R32) and a mixture of 51.11 mass% R32 + 48.89 mass% pentafluoroethane (R125) was measured at temperatures from 268 K to 328 K and at pressures up to 30 MPa. The reported density measurements are in the single-phase region and cover a range of ρ > 800 kg · m−3.
A. Matsuguchi, K. Yamaya, N. Kagawa
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The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements. They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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ТЕРМОДИНАМИЧЕСКИЕ СВОЙСТВА АЛЬТЕРНАТИВНОГО ХЛАДАГЕНТА R32
Industrial Gases, 2015Представлены значения термодинамических свойств (плотности, энтальпии и энтропии) альтернативного хладагента дифторметана (R32) на линии насыщения в интервале температур 200 – 345 К и в однофазной области при температурах 200 – 400 К и давлениях 0,1 – 10 МПа.
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