Results 141 to 150 of about 2,727 (197)

Thermodynamic properties of HFC-32, HFC-125, and HFC-134a mixtures

Fluid Phase Equilibria, 1998
Abstract This study presents an equation of state for mixtures of HFC-32, HFC-125, and HFC-134a based on available PVT x , VLE, heat capacity and speed of sound measurements. The equation of state is valid for VLE and superheated gaseous and compressed liquid phases from 200 to 470 K and pressures up to 20 MPa.
Chun-cheng Piao, Ikuhiro Iwata, Masahiro Noguchi   +2 more
openaire   +1 more source

HFC-365mfc and HFC-245fa Progress in Application of New HFC Blowing Agents

Journal of Cellular Plastics, 1998
For a few years now we have regularly reported our progress in the evaluation of possible 3rd generation blowing agents, and we have come to the conclusion that HFC-245fa and HFC-365mfc are the two leading candidates. Previous work included lab scale evaluation of foam samples, measurements of the main relevant physico-chemical characteristics, as well
L. Zipfel, W. Krucke, K. Borner, P. Barthtlemy, P. Dournel   +4 more
openaire   +1 more source

Thermal Conductivity of HFC-32, HFC-125, and HFC-134a in the Solid Phase

International Journal of Thermophysics, 1998
Measurements of the thermal conductivity of HFC-32, HFC-125, and HFC-134a were carried out for the first time in both solid and liquid phases at the saturation pressure at room temperature and in the temperature ranges from 120 to 263, from 140 to 213, and from 130 to 295 K, respectively. A transient hot-wire instrument using one bare platinum wire was
X. Gao, Y. Nagasaka, A. Nagashima
openaire   +1 more source

Isothermal VLE measurements for the binary mixtures HFC-134a + HFC-245fa and HC-600a + HFC-245fa

Fluid Phase Equilibria, 2001
Abstract The substitution of CFC-114 in high temperature heat pumps is still far from being solved. Some pure compounds such as 1,1,1,2,3,3-hexafluoropropane (HFC-236ea), 1,1,1,3,3,3-hexafluoropropane (HFC-236fa) and 1,1,1,3,3-pentafluoropropane (HFC-245fa) have been proposed, but it is probable that the best alternative will be given by a binary or ...
S Bobbo, L Fedele, M Scattolini, R Camporese   +3 more
openaire   +1 more source

HFC-32 and HFC-125 adsorption in the zeolite silicalite

2023
This project contains the raw data obtained from experiments and grand canonical Monte Carlo simulations of adsorption of HFC-32 and HFC-125 in the zeolite silicalite.
Maginn, Ed, Yancey-Jardon, Andrew David, Shiflett, Mark B., Marin-Rimoldi, Eliseo   +3 more
openaire   +1 more source

Vapor–Liquid Equilibria of CFC Alternative Refrigerant Mixtures: Trifluoromethane (HFC-23)+Difluoromethane (HFC-32), Trifluoromethane (HFC-23)+Pentafluoroethane (HFC-125), and Pentafluoroethane (HFC-125)+1,1-Difluoroethane (HFC-152a)

International Journal of Thermophysics, 2000
Isothermal vapor–liquid equilibria for three binary mixtures of CFC alternative refrigerants were determined in an equilibrium apparatus in which both phases were continuously recirculated. The pressures and vapor and liquid compositions were measured for the binary systems trifluoromethane (HFC-23)+difluoromethane (HFC-32) and trifluoromethane (HFC-23)
J. S. Lim, J.-Y. Park, B.-G. Lee
openaire   +1 more source

Burning velocity measurement of HFC-41, HFC-152, and HFC-161 by the spherical-vessel method

Journal of Fluorine Chemistry, 2006
Abstract The burning velocities of fluoromethane (HFC-41), 1,2-difluoroethane (HFC-152), fluoroethane (HFC-161) and ethane were measured by the spherical-vessel (SV) method at room temperature and at initial pressures of 80–107 kPa over a wide range of HFC/air equivalence ratios ( ϕ ). The burning velocities were determined from the measured pressure
Kenji Takizawa, Akifumi Takahashi, Kazuaki Tokuhashi, Shigeo Kondo, Akira Sekiya   +4 more
openaire   +1 more source

Viscosities of HFC-32 and HFC-32/lubricant mixtures

International Journal of Thermophysics, 1996
A modified capillary tube method has been used to measure viscosities for HFC32 over a temperature range from -20 to 90°C and a pressure range from 0.1 to 5.3 M Pa, and for the liquid mixtures of HFC-32 with a synthetic polyolester oil at temperatures from 20 to 75°C and oil mass fractions from 0.44 to 1.
V. Z. Geller, M. E. Paulaitis, D. B. Bivens, A. Yokozeki   +3 more
openaire   +1 more source

Viscosity of Gaseous Mixtures of HFC-125+HFC-32

International Journal of Thermophysics, 2001
This paper reports experimental results for the viscosity of gaseous mixtures of HFC-125 (pentafluoroethane)+HFC-32 (difluoromethane). The measurements were carried out with an oscillating-disk viscometer of the Maxwell type at temperatures from 298.15 to 423.15K. The viscosity was measured for three mixtures (mole fraction of HFC-125 is 0.7498, 0.4998,
C. Yokoyama, T. Nishino, M. Takahashi
openaire   +1 more source

Relative Permittivity Measurements of 1,1,1,2-Tetrafluoroethane (HFC 134a), Pentafluoroethane (HFC 125), and Difluoromethane (HFC 32)

Journal of Chemical & Engineering Data, 1998
The relative permittivity of HFC 134a, HFC 32, and HFC 125 was measured as a function of temperature and pressure, to cover the liquid and gaseous states. The temperature range studied was 303 to 403 K, and the pressure range was 4.0 to 30.0 MPa.
Abbott, AP, Eardley, CA, Tooth, R
openaire   +2 more sources