HEAT TRANSFER ANALYSES OF VARIOUS COOLING MEDIUM IN A CONDENSER ON COMPUTER LINKED REFRIGERATION SYSTEM

Abstract

A condenser is a cooling device uses refrigerant that induces condensation to high-pressure refrigerants by ventilating the heat of the high-temperature refrigerant away from a system while maintaining its pressure. The application of the cooling medium or coolant such as water is crucial in absorbing heat as it will result in the effectiveness of the condenser. This research is to evaluate and identify the effectiveness of various coolant that used in cooling system of a condenser thus upgrading the effectiveness of the heat transfer medium device by comparing their rate of heat transfer capability. The experiment is carried out using a computer linked refrigeration system test bench. The working fluids for cooling system in condenser used are tap water (Coolant A) and to be compared with conventional Deions Premixed Long-Life Coolant. The Deions coolant is prepared in two concentration which is 10 % (Coolant B) and 12.5% (Coolant C). The mass flow rate of the system is ranging from 0.5 lpm to 2.75 lpm with the interval of 0.25 lpm. The initial temperature of each coolant at the inlet is constant at 26°C. During the experiments, each coolant flows in the piping system, passing through the condenser that carries out the dissipation of the unwanted heat before flowing out of the pipe. Both temperatures of the coolant before and after passing through the condenser were measured with the thermocouple provided and the cooling rate is calculated. Based on the findings, the Coolant C with higher concentration and mass flow rates is the expected to be the most effective coolant compared to others.