in the present work, the integral equations method is used to calculate transport properties of polar fluids. for this goal, we use the stockmayer potential and examine theoretically the thermal conductivity of several refrigerant mixtures such as r125+r134a, r125+r32, r125+r152a, r134a+r32, r152a+r32, r134a+r143a, and r125+r143a. we solve numerically the ornstein-zernike (oz) equation using th...

The R410A refrigerant blend (GWP = 2088), a near azeotropic and equimass mixture of difluoromethane (R32, GWP 675) pentafluoroethane (R125, 3500), has been included in the HFC phase down road map established worldwide. In this context, recovery value-added R32 from using membrane technology would be breakthrough refrigeration air conditioning sector, given that conventional distillation cannot ...

The aim of this study was to test the ability of a simple two segment model to describe the frequency dependence of resistive impedance in obstructive patients, and to investigate the significance of parameters derived from this model. The study was performed in 38 patients, in the basal state and after inhalation of 200 micrograms salbutamol. Impedance data measured over 4-32 Hz were fitted by...

Global warming is one of the most pressing issues world facing today. The refrigeration sector, major contributors to global warming, needs follow a methodological approach address this issue. This paper evaluates overall impact along with thermodynamic performance different generations refrigerants in cascade system. main aim comparative study present comprehensive outlook on environmental ref...

Due to the detrimental environmental consequences of synthetic refrigerants, natural refrigerants have gained renewed interest as alternative for a variety applications due their minimal ozone depletion potential (ODP) and insignificant global warming (GWP). This study compares performance characteristics R32-based Air Source Heat Pump (ASHP) those R290 R410A refrigerants. In this study, analys...

This paper presents technical assessment of environmentally friendly refrigerants as alternatives to R410A for window air conditioners. The alternative refrigerants that are studied for its replacement include R32, R600a, R290, R1234yf, R1234ze and a mixture of R32 (90% molar concentration) and R125 (10% molar concentration). Baseline experiments were performed on a window unit charged with R41...

A His-tagged derivative of the multidrug efflux pump AcrB could be crystallized in three different space groups (R3, R32 and P321). Experimental MAD-phasing maps from R32 AcrB(His) crystals were obtained to a resolution of 3.5 A. Datasets of native and substrate soaked AcrB(His) crystals were collected at the Swiss Light Source X06SA beamline up to a resolution of 2.7 A and refinement of these ...

Abstract The improper usage of refrigerants has a drastic impact on the environment, which is contributing to global warming and ozone layer depletion. are being used currently have very high GWP (Global Warming Potential) value that signifies an adverse warming. Refrigerant properties can be enhanced modified by making refrigerant blends. This research uses as measure provides alternative blen...

HFO1234yf is a promising alternative for automobile air conditioners because of its low GWP of 4 and thermophysical properties similar to those of R134a. However, its performance is inferior to R410A. This makes it difficult to be applied to residential air-conditioners. A mixture of HFO1234yf and R32 is expected to balance both the GWP and COP requirement when applied to residential air-condit...