In this paper analytical study has been made to investigate a hybrid refrigerant consists of different refrigerants with mixing ratios and find out its effects on the performance cycle specify best that gives least environmental pollution. Firstly vapor compression refrigeration system analyzed several pure refrigerants( R11, R12, R13,R22,R23, R32, R41, R115, R116, R124, R125, R134a, R142a, R14...

Abstract Due to the growing demand for refrigerators and air conditioners in automobiles, there is a need an innovative efficient design achieve both refrigeration conditioning. To address this, present work has evaluated two-evaporator vapor compression system eliminate requirement separate conditioning units. Theoretical energy exergy performance assessment of same carried out along with vari...

This project aims to find correlations between various flow parameters and liquid refrigerant flow distribution within a horizontal manifold supplying two-phase R134a downward into fifteen aluminum microchannels. Liquid flow rates, system pressures, and refrigerant temperatures are recorded. Prior to this project, similar experiments were conducted using an identical manifold setup with water/a...

This paper presents a cost-effective method to increase the COP and utility of a domestic refrigerator using R-134a refrigerant. A cabin was installed on the top of a domestic refrigerator with condenser coils of refrigerator serving as heating coils inside the cabin. Known quantity of water was heated by the condenser coils (due to convection currents) thereby increasing the overall COP of the...

Pool boiling on surfaces where sliding bubble mechanism plays an important role has been studied. The heat transfer phenomenon for such cases has been analysed. The model considers different mechanisms such as latent heat transfer due to microlayer evaporation, transient conduction due to thermal boundary layer reformation, natural convection and heat transfer due to the sliding bubbles. Both m...

Cryogen Spray Cooling (CSC) is an auxiliary procedure that pre-cools the epidermis during Laser Dermatologic Surgery (LDS) to avoid non-specific epidermal thermal damage. During CSC, explosive atomization, inflight evaporation and droplet-substrate interaction affect heat extraction from the substrate. In order to understand the heat transfer mechanism of this complex process, we first study th...