The Effect of Variations Temperature in Expansion Valve on The (COP) Coefficient of Performance from An Air Conditioning Engine Prototype Mini Water Chiller

<p>This experiment aims was to determine the effect of variations temperature in expantion valve on (COP)Coefficient Of Performance from an air conditioning engine prototype mini water chiller, chiller designed by students Mechanical Engineering Education, Undiksha. The method used this research is experimental method. testing process carried out at Refrigeration Laboratory In experiment, variation working determined 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. tool vary expansion a thermoelectric cooler. To calculate (COP) Coefficient it necessary collect data every several measurement points T<sub>1</sub>, T<sub>2</sub>, T<sub>4</sub>. Then acquisition, processing value. After testing, found chiller. lower valve, will increase.</p>