ESTIMATING PERFORMANCE OF AIR - COOLED SCREW CHILLER BY LOWERING CONDENSOR TEMPERATURE

This paper presents performance enhancement of air - cooled screw chiller by using cooling tower exhaust air. The chiller was tripping in peak summer on high discharge pressure. After finding out the reason a additional ducting arrangement was provided from cooling tower exhaust to air - cooled screw chiller condenser. This ducting arrangement can discharge exhaust air from cooling tower to air cooled screw chiller conden ser. Study was carried out in various seasons like peak summer, winter, monsoon, and to find the enhancement of Coefficient of Performance (COP) for screw chiller. After providing ducting arrangement the tripping of air cooled screw chiller stopped, also C OP improved. The COP can be improved approx. 16 % in peak summer by using this duct arrangement system.