Results 41 to 50 of about 13,565 (218)
Analysis of R134a Organic Regenerative Cycle
Journal of Power and Energy Engineering, 2020 The analysis of organic regenerative cycles is necessary to verify the possibilities of increasing the work and efficiency of a thermodynamic cycle according to some control parameters. The results obtained from this work can be beneficial in several areas such as solar thermal energy.
André Felippe Vieira da Cunha +1 more
openaire +2 more sources
Asia-Pacific Journal of Chemical Engineering, Volume 21, Issue 2, March/April 2026.ABSTRACT The growing impacts of climate change and energy scarcity demand environmentally sustainable refrigeration solutions. This study investigates eco‐friendly refrigerants (R152a, R290 and R600a) and their optimized ternary mixture as alternatives to R134a. Four blend compositions were analysed using experimental testing and REFPROP 10.0 modelling
M. Periyasamy, P. Senthilkumar
wiley +1 more source
Review and Potential Analysis of R1234yf Heat Pump Technology
Zhileng xuebao, 2020 Electric vehicles do not have sufficient engine waste heat to meet heating demands in winter. As such, heat pump technology has become a research hotspot to achieve a higher efficiency than electric resistance heat.
Liu Yusheng +3 more
doaj
R134a flow patterns in small diameter tubes [PDF]
, 2004 R134a vapour-liquid two-phase flow patterns were studied in vertical small diameter tubes. The observed flow patterns include bubbly, dispersed bubble, slug, churn, annular and mist flow.
Chen, L, Karayiannis, TG, Tian, YS
core
Thermally Optimized Engineering of a Battery Pack for Racing Cars
Battery Energy, Volume 5, Issue 2, March 2026.A time‐dependent CFD analysis compares six cooling architectures for a Formula student Li‐ion battery pack built on a metallic finned frame. A multi‐parametric single‐objective function merges thermal and structural metrics to identify the optimal trade‐off between performance and compactness, highlighting the potential of hybrid liquid–PCM systems ...
Nicolò Zatta +3 more
wiley +1 more source
Speed of sound in liquid R134a
International Journal of Refrigeration, 1992 Abstract The speed of sound for liquid R134a (1,1,1,2-tetrafluoroethane) has been measured along isotherms at temperatures from close to the triplee point to above the critical temperature (180–380 K) at pressures from near saturation to 70 MPa. The measurements were made by using a pulse-echo-overlap technique at 3 MHz.
Henrique J.R Guedes, John A Zollweg
openaire +1 more source
P-V-T Behavior of 2,3,3,3-Tetrafluoroprop-1-ene (HFO-1234yf) in the Vapor Phase from (243 to 373) K [PDF]
, 2010 The P-V-T properties of 2,3,3,3-tetrafluoroprop-1-ene (CF 3 CFdCH 2 , HFO-1234yf), an environmentally friendly refrigerant, were measured using a constant volume apparatus.
Di Nicola, Cristiano +4 more
core +1 more source
Asia-Pacific Journal of Chemical Engineering, Volume 21, Issue 1, January/February 2026.ABSTRACT This study investigates binary zeotropic mixtures of R744 (CO₂) blended with eco‐friendly refrigerants for medium‐high temperature heat pumps, comparing them with conventional R744/R134a systems. All mixtures meet 60–80 K temperature lift requirements under low‐temperature conditions. A genetic algorithm optimized system parameters using fixed
Lingling Sun +6 more
wiley +1 more source
International Journal of Air-Conditioning and Refrigeration, 2017 This paper presents an experimental analysis of a vapor compression refrigeration system (VCRS) using the mixture of R134a and LPG with mass fractions of 28:72 as an alternative to R134a. In this work, we compare the energy performance of both refrigerants, R134a/LPG (28:72) and R134a, in a monitored vapor compression refrigeration system under a wide
Jatinder Gill, Jagdev Singh
openaire +1 more source
Investigation of an R134A Refrigerant/Iso 32 Polyol Ester Oil Mixture in Condensation [PDF]
, 2001 Air Conditioning and Refrigeration Project ...
Chato, J.C. +2 more
core