Testing Parameters Of VCR Unit Effect By Varying Size Of Capillary Tube And Quantity Of Refrigerant Charge Of R134a

Abstract

In the modern day living, refrigerators have become the most essential part for the human life. Every domestic
home uses a minimum of one refrigerator; also the refrigerators are used for industrial purposes. Thus, energy usage is the
main criterion as the refrigerator (Vapour Compression system) uses the power to run the compressor. The quick diminution
of traditional fuel sources and ecological contamination are the main problems by the plentiful usage of present oils. Hence a
systematic approach is to be prepared in order to achieve the optimized design parameters of unit, which raises the overall
performance of the refrigerator, and decrease the compressor work. An effective fabrication is achievable by hypothetical
estimates, still may be unsuccessful owing to cause that uncertainty and complexity in completion of transfer of heat from
refrigerant contained by condenser tube to the atmospheric air, and therefore practically examination is preferred for present
work. The test trail conducted on a VCR unit by changeable diameters of capillary-tube and various amount of refrigerant
charge. Investigation performed to enhance the performance with suitable geometry of capillary tube for specific refrigerantcharge.
The refrigerant used in the experiment was R134a. It is found with 150g of R134a charge has the highest COP with the system
running on the capillary tube diameter of 0.042 inches. The cooling effect gained by the system and mass flow rate is highest
with the capillary tube diameter of 0.036 inches with 100g of refrigerant charge than the remaining ones. Compressor
Pressure Ratio is highest for 0.031inch diameter with 100g of Refrigerant Charge.