Results 41 to 50 of about 15,890 (250)
ِA simulation of effect the change in capillary tube diameter on a compression refrigeration system performance [PDF]
Kirkuk Journal of Science, 2012 A simulation compression refrigeration system study was presented in this research depending on the change of the capillary tube diameter and using the refrigerants (R134a, R12, R500 and R152a).
Tamir K. Salim +2 more
doaj +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
Energy Science &Engineering, EarlyView.This review highlights how nano oils and eco‐friendly nano refrigerants enhance energy‐efficient refrigeration by improving thermal conductivity, lubrication, and system performance. The integration of rheological and tribological testing confirms reduced compressor work, better heat transfer, and higher COP using sustainable, low‐GWP refrigerants for ...
Mohammed Dilawar +7 more
wiley +1 more source
Lubrication Science, EarlyView.ABSTRACT Porous gas bearings (PGBs) enable high‐speed, oil‐free operation in modern rotating machinery. This study develops a coupled thermo‐hydrodynamic (THD) model for a cylindrical porous gas bearing lubricated with four working fluids—air, R‐134a, helium and hydrogen.
S. Bechiri, B. Bouchehit, B. Bou‐Saïd
wiley +1 more source
The effect of tube diameter on vertical two-phase flow regimes in small tubes [PDF]
, 2006 Flow boiling flow patterns in four circular tubes with internal diameters of 1.10, 2.01, 2.88 and 4.26 mm were investigated in the present project. The experiments were conducted in vertical upward two-phase flow using R134a as the working fluid.
Chen, L, Karayiannis, TG, Tian, YS
core
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
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
Mengurus masyarakat Singapura gaya Lee Kuan Yew: satu legasi [PDF]
, 2020 Lee Kuan Yew (LKY) negarawan unggul Asia Tenggara yang berjaya menggerakkan tindakan-tindakan pragmatik dengan nilai dan gaya kepimpinan berkesan demi mencapai visi pembangunan Singapura. Memiliki pengalaman politik hampir 60 tahun (1955-2011) menjadikan
Jaes, Lutfan +3 more
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
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