Due to the undesirable environmental consequences ofR12, there is a great challenge to find a suitable substitute for Rl2. A new refrigerant blend Rl34a!R218/R600a (88'Yoi9'Yol 3%) called JSCEON 49 has been developed as a long term, zero ozone depletion-potential replacement for Rl2. A computer program was written to calculate the cycle characteristics, such as cooling capacity, coefficient of ...

Researchers have been motivating by the global warming challenge to develop alternatives substances compounds that contribute this problem. The refrigerant R134a (HFC134a) has identified as one of most environmentally damaging gases. As a result, R1234yf employed in air conditioning systems substitute R134a. condensation heat transfer coefficient (HTC) refrigerants and was measured on smooth st...

Environmental concerns are forcing the replacement of commonly used refrigerants, and finding new fluids is a top priority. Soon R134a will be banned, hydro-fluoro-olefin (HFO) R1234ze(E) has been indicated as an alternative due to its smaller global warming potential (GWP) shorter atmospheric lifetime. Nevertheless, for optimal replacement, thermo-fluid-dynamic characteristics have assessed. F...

The curvature and temperature dependency of the liquid-vapor surface tension has a significant influence on accurate prediction nanobubble/nanodrop nucleation process. In this work, mesoscopic approach combining pseudo-potential multiphase lattice Boltzmann method (LBM), principle dynamic similarity, van der Waals theory corresponding states is adopted to quantitatively investigate Tolman lengt...

• R516A, R513A, and R1234yf are compared as alternatives to R134a. The first experimental results of the R516A blend presented. R513A presents highest overall system performance by enhancement 2% in cooling mode. In mode, shows COP at low evaporating temperatures ranging from (1 15%). This work an comparison for GWP refrigerants used vapour compression heating systems. study compares three lowe...