Understanding thermophoresis in nanorefrigerants stands challenging for a long period despite the phenomenon is attributed motion dynamics of particles nanofluids. Influence thermophoretic mobility copper-oxide nanoparticles on heat transfer behavior isobutane (R600a) refrigerant reported this work. Pool boiling isobutane/copper-oxide nanofluid numerically simulated computational fluid utilizin...

This study presents an experimental comparison of energy, exergy flow and second law efficiency of R22 and its substitute R436b (hydrocarbon mixture of 52% of propane (R290) 48% of isobutene (R600a)), vapour compression refrigeration cycles. The vapour compression refrigeration cycle was initially designed to operate with R22. The primary objective of this paper is to analyze the system process...

This paper presents a comparable evaluation of R600a (isobutane), R290 (propane), R134a, R22, R410A, and R32 in an optimized finned-tube evaporator, and analyzes the impact of evaporator effects on the system coefficient of performance (COP). The study relied on a detailed evaporator model derived from NIST’s EVAP-COND simulation package and used the ISHED1 scheme employing a non-Darwinian lear...

The use of nanoparticles along with the conventional refrigerant in a vapor compression cycle is relatively new idea, where nano-refrigerants are found to have improved thermo-physical properties over refrigerants. Nano-refrigerant combination improve performance refrigeration process. In this study, developed nanofluid from agricultural source (rice husk) was applied domestic refrigerator and ...

The development of more efficient hermetic compressors for refrigeration involves a sound analysis of the heat exchanges inside the machine to evaluate the interaction among compressor structure, flow characteristics, refrigerant properties and operative conditions. This work presents a computational procedure for the steady-state thermal analysis of a hermetic reciprocating compressor. The mac...

Ejector refrigeration is a promising technology for the integration into solar driven cooling systems because of its relative simplicity and low initial cost. The major drawback of such a system is associated with its relatively low coefficient of performance (COP) under variable operating conditions. In order to overcome this problem, an advanced ejector was developed that changes its geometri...