In this paper, a first- and second-law analysis of vapor compression refrigeration is presented to estimate propose the replacement R134 with working fluids having less global warming potential (GWP) exergy destruction irreversibilities. Six different refrigerants were studied, namely, R717, R1234yf, R290, R134a, R600a, R152a. A thermodynamic model was designed on Engineering Equation Solver (E...

Abstract Due to the phase-out of CFCs and HCFC refrigerants, propane is a nature refrigerant occurring substance produced by natural gas production oil refining. As result, has higher latent heat lower density than conventional refrigerants while maintaining comparable saturation pressure thermal conductivity. So, already widely used in domestic fridges freezers for many years. However, propane...

In presented work, researchers have used efficiency defect as a tool for checking the utility of different refrigerants in Vapour compression refrigeration system. A mathematical model simple system is created. Using first law analysis and exergy calculated various components individually whole vapour well. It found that R1234yf has highest value system, whereas R134a least Variation with evapo...

A summary of a thermophysical properties program for six candidate alternative. refrigerants is given. This work has been performed recently at the National Institute of Standards and Technology (U.S.A.), Thermophysics Division, in Gaithersburg, Maryland. Properties measured include gas and liquid·phase PVT, vapo~ pressures, surface tension, index of ~efraction, dielect~ie eons~ant, gas phase s...

The effect of the hydrochlorofluorocarbon (HCFC) and hydrofluorocarbon (HFC) refrigerants on environment through attack its halogen contents-chlorine fluorine, ozone layer toxic nature such refrigerants, has paid attention researchers to work towards getting suitable alternatives using hydrocarbons (HC) or blends with HFC refrigerants. This study was centered a retrofit R-134A good coefficient ...

Magnetic refrigeration material is the key to adiabatic demagnetization technology. In this work, two magnetic refrigerants, Gd5(C4O4)(HCOO)3(CO3)2(OH)6·2.5H2O (1) and Gd2(OH)4SO4 (2), were prepared through hydrothermal reaction. study reveals that their entropy changes are 24.8 J kg−1 K−1 for 1 15.1 2 at K T, respectively. The of T = ∆H exceed most gadolinium hydroxyl compounds, indicating ref...

Given the safety issues associated with flammability characteristics of alternative environmentally-friendly refrigerants, it is vital to establish measurement systems accurately analyse these mildly flammable refrigerants. In this study, we used a customised Hartmann bomb analogue measure minimum ignition energy (MIE) and laminar burning velocity (BV) for refrigerant/air mixtures pure ammonia ...

This review study examines flow boiling heat transfer in micro-fin tubes using mixed and pure refrigerants with zero ozone-depleting potential (ODP) minimal global warming (GWP). investigation focuses on the extraordinary relationship between coefficients (HTCs) vapor quality. Since introduction of exchanger over 30 years ago, refrigerant-based cooling has improved significantly. Air conditioni...

In this paper analytical study has been made to investigate a hybrid refrigerant consists of different refrigerants with mixing ratios and find out its effects on the performance cycle specify best that gives least environmental pollution. Firstly vapor compression refrigeration system analyzed several pure refrigerants( R11, R12, R13,R22,R23, R32, R41, R115, R116, R124, R125, R134a, R142a, R14...

The knowledge of the phase equilibrium refrigerant mixtures is crucial for optimization production processes molecules, and design energetic systems (heat pumps, Organic Rankine Cycles, …). In this work, different predictive thermodynamic models (COSMO-RS COSMO-SAC-dsp) have been used to determine behavior refrigerants involving alkanes, fluorinated chlorinated compounds. COSMO-RS model leads r...