A fully 3D conjugate numerical analysis was performed to reveal the effects of air, R134a refrigerant and water on electromagnetic fields of electronic cooling designs made of arrays of micro pin-fins with integrated ThroughSilicon-Vias (TSVs). The integrated TSV cooling configuration included 8 cylindrical TSVs with 150 μm diameter each and 200 μm height. The external dimensions of the silicon...

Experimental measurements of local heat tra nsfer coefficients and pressure drop are made for forced conv ection boiling and condensation for R134a-oil mixtures inside a horizontal tube. The results are compared with the experime ntal data of pure Rl34a. Average convection boiling and cond ensation heat transfer coefficients decreased about 20% at a 10\ o il mass fraction, and boiling and conde...

In this paper, a new combined system is proposed for recovering thermal energy at medium temperature using cascade organic Rankine cycle to feed refrigeration cycle. Energy and exergy analysis applied the determine its performance different working fluids under same operating conditions taking into account effect of some parameters selection on performance. The pair fluid
 (Toluene/R245fa)...

Experimental and simulation investigation of the performance characteristics different refrigerants blends is carried out to replace existing refrigerant R134a for a vapour compression refrigeration system. The VCRS systems was improved by several researchers introducing concept mixing family with low GWP in working circuit. This research paper presents results that can it also an attempt cover...

This study proposes the experimental evaluation of alternative refrigerants with low global warming potentials (GWPs) such as R1234ze(E), R513A, and mixture R516A a drop-in replacement for R134a in domestic refrigerator volumetric capacity 513 L. Initially, optimal charge each refrigerant was defined based on minimum energy consumption refrigerator, then thermal performance evaluated. Finally, ...

The use of refrigerants with a global warming potential (GWP) greater than 150 is banned in small and medium-sized refrigerators accordance the European F-Gas policy. Therefore, suitability retrofitting an existing refrigerator using low GWP working fluid (R152a), as replacement for usual refrigerant (R134a) that harmful to environment, was investigated experimentally this paper. In study, clos...

An experimental investigation of oil retention and pressure drop characteristics for R1234yf, R134a and R410A with POE 100 is presented, for horizontal and vertical suction lines of 10.2 mm internal diameter. Conditions of operation include a saturation temperature of 13 °C and a superheat of 15 °C, with the superficial vapor velocity and the Oil in Circulation Ratio (OCR) both varied in the ra...

Abstract—In present paper, the performance of various alternative refrigerants is compared to find the substitute of R22, the widely used hydrochlorofluorocarbon refrigerant in developing countries. These include the environmentally friendly hydrofluorocarbon (HFC) refrigerants such as R134A, R410A, R407C and M20. In the present study, a steady state thermodynamic model (includes both first and...

This study aims experimentally to investigate the performance parameters of R134a and alternative R516A refrigerant in two evaporator ejector cooling system (DEES) at different air velocities evaporator#1. Firstly, tests were carried out with under steady-state conditions then repeated low GWP refrigerant. As R134a, higher capacity was achieved velocity values. When value 1.1, 1.7, 2.2, 2.7 m s...