Open AccessPerformance of oil-free water-cooled chiller for a shopping center air conditioning system
Author(s) -
Ardiyansyah Yatim,
Jodhi Ananda Prima,
M. A. Jofansya,
Muhammad Idrus Alhamid,
Budihardjo BUDIHARDJO,
Arnas Lubis
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/673/1/012010
Subject(s) - chiller , water chiller , chiller boiler system , condenser (optics) , evaporator , chilled water , gas compressor , air conditioning , water cooling , coefficient of performance , cooling capacity , evaporative cooler , automotive engineering , engineering , environmental science , mechanical engineering , refrigerant , thermodynamics , light source , physics , optics
Many researches have been conducted on cooling equipment to reduce its energy consumption, maintenance and operation cost. Oil-free chiller uses a magnetic bearing compressor to avoid friction loss from the bearing’s contact surface. In comparison to a conventional compressor, the magnetic bearing of the motor, with the help of variable speed drive (VSD), runs more efficiently at partial loads. This paper presents the application of oil-free compressors in a chiller plant. The chiller plant also includes a chilled water system. In designing an energy-efficient air conditioning system it is important to choose proper chilled water and cooling water system. The evaporator is used to absorb the heat from the conditioned room while the condenser rejects the heat from the chiller to the environment through circulating cooling water. This research also aims to analyze the chiller plant for the air conditioning system operates in one of the shopping malls in Indonesia and how it affects the performance of the magnetic bearing chiller. The research also presents an analysis of the efficiency of the chiller plant, the coefficient of performance of each compressor, and their compliance with both national and international standards.