Air-Cooled Chiller Experimental Set-Up an‎d The Primary Experimental Results

This paper presents a small air-cooled chiller experimental set-up being used to investigate the energy performance and other characteristics of an air-cooled chiller system using various refrigerants. The expanded uncertainty of measure temperature devices with a level of confidence of 95% is 0.21 K. The expanded uncertainty of measure pressure devices with a level of confidence of 95% is 2.7 kPa. The uncertainty of the enthalpy from this study is 0.66 kJ/kg, about 0.24 %. If the chilled water temperature is 8°C, the COP is 2.55. If the chilled water temperature is 12°C, the COP is 2.89, an increase of 13%. The COP increases about 13 % whilst the chilled water temperature increase only 4 K.