PERFORMANCE ANALYSIS OF 20 TR AIR COOLED CHILLER WITH EVAPORATIVE COOLING USING COOLING PAD

Abstract

Energy is a basic necessity shared by all living things on the planet, much like water, food, and shelter so we need to save energy and protect our mother earth. The recent increase in awareness of global warming has rekindled the hunt for environment friendly refrigerants that have a lower impact on global warming and zero ozone depletion effect. The aim of this study is to examine how a spray evaporative cooling system can improve the efficiency of an air-cooled scroll chiller in a tropical climate region. To achieve this, the study involves the design selection and simulation of a fin and tube type heat exchanger, as well as theoretical investigation that combines a spray evaporative cooling system with the air-cooled scroll chiller in the Fin and tube type heat exchanger. According to the theoretical results, the addition of the spray evaporative cooling system to the air-cooled chiller led to a reduction in compressor power consumption and an increase in the COP (Coefficient of Performance) of the chiller, ranging from 6.25% to 18.66%. Additionally, the use of the spray cooling system resulted in power savings of 6.36% to 17.26% in air-cooled chiller systems. To further improve the COP of the air cooled chiller, it is suggested to use a more appropriate spray evaporative cooling mode, such as adjusting the water flows based on the cooling capacity and positioning the cooling pads at appropriate distance from condenser. Certain design constraints are addressed, as well as several methods for improving system functionality for future optimization.