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Displaying 1 - 25 of 570

Reference Correlation for the Viscosity of Difluoromethane (R-32) from the Triple Point to 425 K and up to 70 MPa

July 4, 2022
Author(s)
Danai Velliadou, Konstantinos Antoniadis, Marc Assael, Marcia L. Huber
… and density for the viscosity of difluoromethane (R-32) based on critically evaluated experimental data. The … difluoromethane, HFC-32, transport properties, viscosity, R-32 … Correlation for the Viscosity of Difluoromethane (R-32) from the Triple Point to 425 K and up to 70 MPa …

Speed of Sound Measurements of Binary Mixtures of trans-1,2-difluoroethylene (R-1132(E)) with Difluoromethane (R-32) or 2,3,3,3-Tetrafluoropropene (R-1234yf)

January 28, 2025
Author(s)
Aaron Rowane
… (R-1132(E)) with difluoromethane (R-32) and 43.5 mole % R-1132(E) with 2,3,3,3-tetrafluoropropene … temperatures ranging from 230 K to 325 K for blends with R-32 and to 342 K for blends with R-1234yf. Measurements … No binary interaction parameters for either the R-1132(E)/32 or R-1132(E)/1234yf system are currently available. …

Vapor-Liquid Equilibrium for the Binary Difluoromethane (R-32)+ Propane (R-290) Mixture

October 16, 2008
Author(s)
Yukihiru Higashi
… equilibrium of the mixture composed of difluoromethane (R-32) and propane (R-290) was studied in the temperature range … of new adjustable parameters for HMX-EOS for the R-32 + R-290 mixture are also discussed. … mixture, Helmholtz free energy model equation, R-32+R-290 mixture, REFPROP 6.0, vapor-liquid equilibria …

Effects of Stretch and Radiation on the Laminar Burning Velocity of R-32-Air Flames

March 4, 2020
Author(s)
Michael Hegetschweiler, John Pagliaro, Lukas Berger, Raik Hesse, Joachim Beeckmann, Heinz Pitsch, Gregory Linteris
… performed for outwardly propagating spherical flames of R-32/air mixtures at constant pressure. A high-speed video … refrigerant flammability, burning velocity, R-32, flame speed, FlameMaster, flame modeling. … Stretch and Radiation on the Laminar Burning Velocity of R-32-Air Flames …

Exploring Nonlinear Flame Speed Inhibition Effects in Mixtures of R1234yf and R32

June 6, 2024
Author(s)
Raik Hesse, Roman Glaznev, Raymond Langer, Christian Felix Schwenzer, Valeri Babushok, Gregory Linteris, Heinz Pitsch, Joachim Beeckmann
This study investigates the flame speed inhibition effects in R1234yf and R32 mixtures, two hydrofluorocarbon (HFC) refrigerants with low global warming potential but mild flammability. The laminar flame speed (S0L,u) is a crucial parameter for assessing

Speed of Sound Measurements of Binary Mixtures of Difluoromethane (R-32) with 2,3,3,3-Tetrafluoropropene (R-1234yf) or trans-1,3,3,3-Tetrafluoropropene (R-1234ze(E)) Refrigerants

January 29, 2022
Author(s)
Aaron Rowane, Richard A. Perkins
… are reported for binary mixtures of difluoromethane (R-32) with 2,3,3,3-tetrafluoropropene (R-1234yf) or … pressures slightly above the bubble point to 12 MPa for R-32/1234yf mixtures to avoid potential polymerization reactions and to 53 MPa for the R-32/1234ze(E) mixtures. The mean uncertainty of the sound …

Isochoric p-rho-T Measurements for Binary Refrigerant Mixtures Containing Difluoromethane (R32), Pentafluoroethane (R125), 1,1,1,2-Tetrafluoroethane (R134a), and 1,1,1-Trifluoroethane (R143a) from 200 to 400 K at Pressures to 35 Mpa

January 1, 2000
Author(s)
Joe W. Magee, William M. Haynes
The p-p-T relationships were measured for binary refrigerant mixtures by an isochoric method with gravimetric determinations of the amount of substance. Temperatures ranged from 200 to 400 K, while pressures extended up to 35 MPa. Measurements were

The N 3 and 2N 3 Bands of 32 S 16 O 3 , 32 S 18 O 3 , 34 S 16 O 3 , and 34 S 18 O 3

December 1, 2003
Author(s)
S W. Sharpe, Thomas A. Blake, R L. Sams, A G. Maki, Tony Masiello, J Barber, N Vulpanovici, J Nibler, A Weber
… '+E') infrared bands of the four symmetric top isotopomers 32 S 16 O 3 , 32 S 18 O 3 , and 34 S 18 O 3 . An internal coupling between … The constants for the center-of-mass subsitituted species 32 S 16 O 3 and 34 S 16 O 3 vary only slightly, as do the …

Synchrotron X-ray Investigation of alpha-Chlorohemin, C34H32ClFeN4O4, an Fe-porphyrin

January 28, 2016
Author(s)
Winnie K. Wong-Ng, James A. Kaduk, Lawrence P. Cook, B Chakraborty, Greg Brewer
X-ray data of a powder sample of alpha-chlorohemin (a member of the porphyrin family), C34H32ClFeN4O4, was collected using synchrotron radiation at the Advanced Photon Source (APS, Argonne National Laboratory). Rietveld Refinement and Density Functional

Data Reduction Considerations for Spherical Constant Volume Flames of R32(CH2F2) with Air

September 25, 2023
Author(s)
Michael Hegetschweiler, Lukas Berger, Raik Hesse, Joachim Beeckmann, Chaimae Bariki, Heinz Pitsch, Gregory T. Linteris
The present work explores data reduction techniques for the measurement of the laminar burning velocities of R32(CH2F2)-air using a constant volume combustion device in which the pressure-time history is the only measured parameter. To allow clear

Isochoric Heat Capacity Measurements for Binary Refrigerant Mixtures Containing Difluoromethane (R32), Pentafluoroethane (R125), 1,1,1,2-Tetrafluoroethane (R134a), and Trifluoroethane (R143a) From 200 to 345 K at Pressures ato 35 Mpa

June 1, 1999
Author(s)
Joe W. Magee
Molar heat capacities at constant volume C v were measured for binary refrigerant mixtures with an adiabatic colorimeter with gravimetric determinations of the amount of substance. Temperatures ranged from 200 to 345 K, while pressures extended up to 35

Isochoric p-rho-T and Heat Capacity Cv Measurements for Ternary Refrigerant Mixtures Containing Difluoromethane (R32), Pentafluoroethane (R125), and 1,1,1,2-Tetrafluoroethane (R134a) From 200 to 400 at Pressures to 35 MPa

June 1, 1999
Author(s)
Joe W. Magee
The p-p-T relationships and constant volume heat capacity C υ were measured fro ternary refrigerant mixtures by isochoric methods with gravimetric determinations of the amount of substance. Temperatures ranged from 200 to 400 K for p-p-T and from 203 to

Viscosity Measurements of R32 and R410A to 350 MPa

August 1, 2017
Author(s)
Arno D. Laesecke, Scott Bair
Viscosity measurements were performed with a falling cylinder viscometer on difluoromethane (R32) and the refrigerant blend R410A (R32+R125 with 50 % by mass) at the temperatures 313.15 K, 348.15 K, and 393.15 K with pressures to 350 MPa. The measurement

Mixture Model for Refrigerant Pairs R-32/1234yf, R-32/1234ze(E), R-1234ze(E)/227ea, R-1234yf/152a, and R-125/1234yf

December 6, 2022
Author(s)
Ian Bell
… departure terms are developed for the refrigerant pairs R-32/1234yf, R-32/1234ze(E), R-1234ze(E)/227ea, R-1234yf/152a, and … with the data available in the literature. The model for R-32/1234yf is most comprehensive in its data coverage, with … Mixture Model for Refrigerant Pairs R-32/1234yf, R-32/1234ze(E), R-1234ze(E)/227ea, R-1234yf/152a, …

Wind and Seismic Effects: Proceedings of the 32nd Joint Meeting

April 1, 2001
Author(s)
Stephen A. Cauffman
This publication contains the proceedings of the 32nd Joint Meeting of the U.S.-Japan Joint Panel on Wind and Seismic Effects. The meeting was held May 16-19, 2000, at the National Institute of Standards and Technology (NIST) in Gaithersburg, Maryland (USA
Displaying 1 - 25 of 570
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