A STUDY ON AIR-COOLED CHILLERS WITH EVAPORATIVELY COOLED CONDENSER FOR 3 TYPES OF CLIMATE

This paper presents a performance analysis of air-cooled chillers with evaporatively cooled condenser in 3 different cities of Turkey with the help of meteorological data provided from the Turkish State Meteorological Service (TSMS). The aim of the study is to determine the effects of evaporative cooling on inlet air of the condenser unit under various humidity and temperature conditions, and therefore on cooling performance (COP) of the air conditioning system. Considering the summer season between June and September for 4 months, it is assumed that the cooling requirements are provided by the direct expansion air-conditioners and the condenser inlet air is cooled by evaporative cooler with 70% effectiveness. The results show that after the evaporative cooling the highest COP increase of the chillers is occurred in most arid city as 40.5%, while the lowest increase was in the most humid city as 15.5%. This improvement increased the cooling capacity by 14.3% and 5.56%, correspondingly. In addition, the mean electrical consumption is considerably decreased as 9.97%, 15.49% and 6.97% for 3 different cities. The highest water consumption was around 5 tons per day for 10 hours of operation and 1400 m(3)/min mean air flow rate.