Abstract:
As a result of rapid economic growth in Malaysia, usage of air-conditioning equipments has
become a necessity for household, shopping complexes and offices.Constitute approximately
60 to 70 percents of total electricity usage in commercialbuildings; air conditioning systems have
posed challenges to Heating Ventilation and Air-Conditioning (HVAC) engineers anddesigners
to find solutions to minimize usage of air-conditioning energy and costswithout sacrificing the
thermal comfort.This dissertation focuses on selecting and carrying out economic analyses on
the typeof air-conditioning systems that provides minimum costs for the same coolingconditions.
Three types of air-conditioning system were used for comparison, districtcooling ice thermal
storage system or DCSITSS (full and partial storage),conventional chillers, and package unit
systems. Due to current governmentincentives by offering a cheaper electricity tariff and no
maximum demand charge atnight (off-peak period), DCSITSS partial storage system proves to
be the mosteconomical air conditioning system. A set of chilled water supply tariff was
alsodetermined and the results reflect that not only DCSITSS partial storage plant can be
commercialised in Malaysia but also its economic gains were quite attractive as thecapacity of
DCSITSS plant increases
