This paper reports on an experimental study evaluating a window air conditioner's performance when R152a/R290/R600/R600a refrigerant mixture (by various mass percentages) is used as possible alternative to R-22. Alternative refrigerants are local, cheap, and environmentally friendly. Unmodified R-22 AC was charged with R152a/R290/R600/R600a. During the experiment, parameters such coefficient of...

Target prediction is generally the first step toward recognition of bona fide microRNA (miRNA)-target interactions in living cells. Several target prediction tools are now available, which use distinct criteria and stringency to provide the best set of candidate targets for a single miRNA or a subset of miRNAs. However, there are many false-negative predictions, and consensus about the optimum ...

Growing concerns about the global warming impact of refrigerants used in HVAC&R equipment are driving development and evaluation of alternative refrigerants with lower global warming potentials (GWPs). The Air Conditioning, Heating, and Refrigeration Institute (AHRI) recently coordinated the Low-GWP Alternative Refrigerant Evaluation Program (AREP) in which commercial, university, and governmen...

To explore the effect of the nature of substitutions on the structural parameters and hydrogen-bond inter-actions in N-acyl-hydrazone derivatives, the crystal structures of three ortho-substituted N-acyl-hydrazone derivatives, namely (E)-N-{2-[2-(2-chloro-benzyl-idene)hydrazin-yl]-2-oxoeth-yl}-4-methyl-benzene-sulfon-amide, C16H16ClN3O3S (I), (E)-N-{2-[2-(2-methyl-benzyl-idene)hydrazin-yl]-2-ox...

In this study, energy analysis of a double-stage Organic Rankine Cycle (ORC) was performed using the Engineering Equation Solver program (EES). first and second stages, eight different organic working fluids (R134a, R410a, RC318, R407c, R22, R23, R116, R218) were used in pairs for certain temperature limits. Choosing suitable refrigerant or pair is crucial ORC’s high thermal efficiency net work...

The flow boiling heat transfer performance of R22 and R407c, in a microfin tube with helix angle 22° an apex 48°, was evaluated study. study is aimed at investigating the impact flux, mass saturation temperature, vapor quality on coefficient during boiling. Two different temperatures, 293.15 K 313.15 K, were used experiments, fluxes ranging from 25 to 85 kW.m-2 150 350 kg.m-2.s-1. To validate e...