PERFORMANCE ENHANCEMENT OF VCR CYCLE BY MODIFICATION OF GEOMETRY OF EVAPORATOR TUBES OF EVAPORATOR

MECHANICAL ENGINEERING

The present study aims to improve shape of the evaporator tubes of the evaporator in a VCR test rig. In the existing VCR refrigerator circular cross-section of the evaporator tubes are used to form the evaporator coil of the refrigerator. In the present work ,change in the geometry of the evaporator tube are studied , where in the cross-section of tube is varied form namely circular geometry (round) ,circular with V-shape notch, circular with Square shape notch and circular with U-shape notch profiles are studied and CoP of setup is experimentally investigated. Our result shows that the CoP of evaporator coil having geometry of round with V-notch and round with U- notch is higher than CoP. of the plain coil and the CoP of the evaporator coil having geometry round with square shape notch is lower than CoP of the round tube evaporator. From experimental investigation it is found out that the maximum CoP achieved by the plain tube coil is 1.74 and by U- notched evaporator profile it is 1.99. Hence, we can conclude that, evaporator having geometry round with U shape notch evaporator coil is most effective out of the four profiles studied.

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