Results 181 to 190 of about 3,003 (225)

Measurements of the surface tension for R290, R600a and R290/R600a mixture

International Journal of Refrigeration, 2007
Abstract The surface tensions of R290, R600a and R290/R600a mixture have been measured by the modified differential capillary-rise method. Twenty-two data points for R290 and 21 data points for R600a were obtained in the temperature range between 273 K and 354 K, and 43 data points for R290/R600a mixture on three isotherms of 278 K, 300 K and 320 K ...
Katsuyuki Tanaka, Yukihiro Higashi
exaly   +2 more sources

Study of refrigeration system with minichannel condenser using R1234ze, R134a, R152a, R600a, R290 and mixture of R290/R600a (50/50)

Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering, 2023
A versatile vapor compression refrigeration (VCR) system is designed, developed and manufactured for testing different alternative refrigerants to R134a. The refrigerants such as R1234ze, R152a, R600a, R290 and mixture of R290/R600a (50/50) refrigerants are tested with an aluminum minichannel condenser which is designed for R134a.
Vijay W Bhatkar, Anirban Sur, Ramesh Kumar   +2 more
openaire   +1 more source

Experimental investigation on two-phase frictional pressure drop of R600a and R600a/3GS oil mixture in a smooth horizontal tube

International Journal of Refrigeration, 2020
Abstract The current work demonstrates an empirical investigation on the two-phase flow frictional pressure drops attributes of the R600a/3GS oil within an inner diameter horizontal tube, sized 8 mm. Furthermore, experiments were carried out at the nominal oil concentrations between 0% and 4% at the saturation temperature of 20 °C, having the heat ...
Jinyou Qiu, Hua Zhang
openaire   +1 more source

Experimental study on the thermal performance of R600a, R290 and R600a/R290 mixtures in a retrofit R134a refrigeration system

2015 International Conference on the Industrial and Commercial Use of Energy (ICUE), 2015
Refrigeration systems play paramount roles in life quality of human beings and social development in terms of food security, environmental impact, and energy efficiency. The traditional CFC, HCFC, and HFC refrigerants have been in the process of phase-out and being replaced by the sustainable working fluids.
Teboho Ramathe, Zhongjie Huan, Aggrey Mwesigye   +2 more
openaire   +1 more source

pVTx properties of binary R1234ze(E)/R600a system

The Journal of Chemical Thermodynamics, 2017
Abstract The gaseous pVTx properties of trans-1,3,3,3-tetrafluoropropene (R1234ze(E)) + 2-methylpropane (R600a) mixtures were measured in temperatures from 280.15 to 330.15 K and corresponding pressures from 138 to 930 kPa and the compositions of R1234ze(E) from 0.65 to 0.90 mass fraction using the Burnett isothermal expansion method.
Rui Cao, Yingxia Qi, Rishuai Chen
openaire   +1 more source

Critical Parameters for 2-Methylpropane (R600a)

Journal of Chemical & Engineering Data, 2005
Measurements of the vapor−liquid coexistence curve near the critical point for 2-methylpropane (isobutane; R600a) were carried out in the reduced temperature range of 0.957 < T/Tc < 1 and in the reduced density range of 0.40 < ρ/ρc < 1.70, and the critical temperature Tc and critical density ρc were determined.
openaire   +1 more source

Phase behavior of R1234yf and R600a in pentaerythritol tetranonanoate

International Journal of Refrigeration, 2020
Abstract 2,3,3,3-tetrafluoroprop-1-ene (R1234yf) and isobutane (R600a) regarded as green refrigerants have received much attention in the refrigeration industry. Phase equilibrium between refrigerant and lubricant has a critical impact on the performance of a compression-refrigeration cycle.
Yanjun Sun, Gaolei Di, Jian Wang, Xiaopo Wang, Maogang He   +4 more
openaire   +1 more source

Investigation of Performance of Vapor Compression Refrigeration System with Forced Air-Cooling Condenser With R600a and Hydrocarbon Mixture (R290 + R600a) as Refrigerant

2020
The environmental impacts like global warming and ozone depletion have become a challenge for R & AC Industry. Even though the refrigerant R134a is better in performance, it is categorized under hydrofluorocarbon which has more GWP and poor heat transfer rates.
Mulla Irfan Ahmad, S. M. Jameel Basha, V. Viswanatha Chari, G. Srinivas Kumar   +3 more
openaire   +1 more source

Novel Saturated Flow Boiling Correlations for R600a and R717 Refrigerants

Heat Transfer Engineering, 2021
This research study provides a detailed analysis of the two-phase flow boiling heat transfer coefficients of R600a and R717. In addition, it proposes novel saturated flow boiling heat transfer correlations for these two refrigerants. In this context, 1306 experimental data points for R600a and 885 data samples for R717 are extracted from the literature
Turgut, Oguz Emrah, Genceli, Hadi, Asker, Mustafa, Coban, Mustafa Turhan   +3 more
openaire   +3 more sources

Molecular dynamics simulations on homogeneous condensation of R600a refrigerant

Journal of Molecular Liquids, 2018
Abstract Molecular Dynamics (MD) simulations have been employed to study the homogeneous condensation phenomenon of R600a (isobutane) refrigerant in the vapor compression refrigeration system. The molecular system consists of superheated vapor isobutane in a cuboid simulation cell with periodic boundary conditions in all directions. A more physically
Md. Sarwar Alam, Ji Hwan Jeong
openaire   +1 more source