Abstract
<p>This experiment aims was to determine the effect of variations temperature in expantion valve on the (COP)Coefficient Of Performance from an air conditioning engine prototype mini water chiller, the prototype mini water chiller was designed by students in the Mechanical Engineering Education, Undiksha. The method used in this research is experimental method. The testing process was carried out at the Refrigeration Engineering Laboratory in Mechanical Engineering Education, Undiksha. In this experiment, the variation of working temperature in expantion valve is determined from 8<sup>0</sup>C, 11<sup>0</sup>C, 14<sup>0</sup>C, 17<sup>0</sup>C and 20<sup>0</sup>C. The tool used to vary the temperature in expansion valve is a thermoelectric cooler. To calculate the (COP) Coefficient Of Performance from prototype mini water chiller, it is necessary to collect data temperature at every several measurement points at T<sub>1</sub>, T<sub>2</sub>, and T<sub>4</sub>. Then from the data acquisition, data processing is carried out to calculate the (COP) Coefficient Of Performance value. After testing, it was found an effect of variations working temperature in expantion valve on the (COP) Coefficient Of Performance from prototype mini water chiller. The lower working temperature in expantion valve, the (COP) Coefficient Of Performance from an air conditioning engine will increase.</p>
Highlights
The role of technology, especially in refrigeration and air conditioning, has been widely used in various sectors of human life [1]
This experiment aims was to determine the effect of variations temperature in expansion valve on the (COP)Coefficient Of Performance from an air conditioning engine prototype mini water chiller, the prototype mini water chiller was designed by students in the Mechanical Engineering Education, Undiksha
From the data acquisition, data processing is carried out to calculate the (COP) Coefficient Of Performance value. It was found an effect of variations working temperature in expansion valve on the (COP) Coefficient Of Performance from prototype mini water chiller
Summary
The role of technology, especially in refrigeration and air conditioning, has been widely used in various sectors of human life [1]. A water chiller-type air conditioning unit is often used in buildings or places with a large room capacity. The expansion valve is a component of the air conditioning engine unit, playing an important role in the refrigeration cycle. The working temperature of the expansion valve will affect the condition of the refrigerant in the heat absorption in the room. Heat radiation from several different components such as compressors, condensers, installation pipes, and heat from outside air will affect the working temperature of the expansion valve. That if this is left unchecked, it can affect the performance, intake of electrical energy, Arnawa, I.K.G.; Wiratmaja , I.G.; Nugraha, I.N.P. MECHTA, v.
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