Green and Clean Expertise

District Cooling System & Thermal Energy Storage


DCS District Cooling System (DCS) is an outsourced solution that provides cooling energy to built environments that are strategically located within the region of a centralised cooling plant. The centralised cooling production distributes cooling energy in the form of chilled water through underground insulated pipeline to buildings within a district, operating 24 hours a day every day. Advantageously replacing conventional installation of individual chillers in each building, the district cooling can help building owners improve space utilisation and reduce electricity consumption through sharing of a centralised DCS.

Thermal Energy Storage (TES) is introduced for strategic load management by taking advantage of lower electricity tariff rates during off-peak hours. By producing and storing cooling energy during the off-peak hours and using it to supplement cooling needs during the day, peak cooling and electrical energy demand and installed capacity can be reduced.


Cofreth is a specialist in Engineering, Procurement, Construction and Commissioning (EPCC) for District Cooling System in Malaysia. We are the FIRST in MALAYSIA to design and build a District Cooling Plant with Stratified Chilled Water Thermal Energy Storage (TES) system for Universiti Tenaga Nasional (UNITEN) owned by Tenaga Nasional Bhd (Malaysia's Electricity Board) in 1996. This turnkey project includes Design, Supply, Construct, Installation, Testing and Commissioning, and Maintenance of the Air-Conditioning, Ventilation, Controls, BAS system and other building facilities with a total installed cooling capacity of 3,500RT (4 x 635RT, 2 x 500RT), 2 Chilled Water Storage Tanks of combined capacity of 26,000 RTh, cooling towers, pump sets, and reticulation piping of 4.5km connecting to more than 15 buildings.


DCS diagram


The DCS and TES project can also be implemented through a Build, Operate & Own (BOO) and Build, Operate & Transfer (BOT) performance contract.