Malaysia's largest district cooling provider serving Putrajaya, Kuala Lumpur City Centre (KLCC) and Kuala Lumpur International Airport (KLIA) precinct. Our assets encompass of 8 co-generation / district cooling plants with total combined capacity of 59 MW electric, 442 ton/hr steam, 147,000 RT & 238,000 RTh chilled water. We aspire to be the Chilled Water and Electricity Provider of Choice in Malaysia. Welcome to our unofficial website.
It should come as no surprise that district cooling – using a central source to supply cooling to a number of buildings instead of multiple individual systems – is widely used. A district cooling solution is very energy-efficient and easy for property owners to use. It is also perfect for historical buildings and architectural gems that prohibit individual air-conditioning units, and where space is often at a premium.
Economical, Flexible and Quiet Cooling
District cooling is the most convenient method for the production and distribution of cooling for commercial purposes, also providing both economic and environmental benefits. The district cooling system offers operating flexibility, since each building can use as much or as little cooling as needed, without worrying about chiller size or capacity – and the system produces no noise or vibrations. Hotels, shopping centers, industrial buildings, office buildings, residential buildings, sports centers and hospitals are examples of facilities that use district cooling.
Rising energy costs is a major challenge to everyone. GDC continuously looking for ways to reduce our operating costs. One of the concept that is employed is co-generation ie. by self-generating electricity at our sites and re-use waste heat available to maximize overall process efficiency. Co-generation is a scenario where simultaneous production of two kinds of energy from the same source at the same time. Electricity is generated from an alternator attached to the gas turbine output shaft. Waste heat from the gas turbine exhaust is channeled to a waste heat boiler to generate steam - which is used as primary energy source to generate chilled water. Gas turbine from Solar Turbines, General Electric and Kawasaki Heavy Industries is chosen to power up our co-generation plants. An Auxiliary Fired Boiler is also installed to supplement steam production needed to produce chilled water.
District Cooling Cools Buildings the Smart Way
District cooling concept begins by chilling water at a centralized plant. Chilled water is then pumped through a long piping system (typically via an underground means) to heat exchangers in different buildings. The heat exchangers are used to transfer the chilling energy from the water (often called Primary Loop) to customers' internal building chilled water loop (often call Secondary Loop).
Cold air then is dissipated within the building via a typical Fan Coil unit and Air Handling Unit. Warm water returns to the heat exchangers for a continuous closed loop cooling process again.
Environmental Friendly Plant
At GDC, natural gas is chosen as our the primary fuel to power gas turbines, boilers and chillers. Hence, the emission of Oxides of Nitrogen (NOx), Carbon Monoxide (CO) and Oxides of Sulphur (SOx) are always at minimum level. Co-generation systems create no hazardous wastes and can be built to discharge zero waste water into the local water treatment system.
High thermal efficiency of co-generation system is its greatest environmental benefit. Overall fuel use for the same electricity and thermal energy is decreased, saving fuel for future generations.
Use of Absorption Chiller to Increase Overall Thermal Efficiency
The steam generated from the Waste Heat Boiler is used to generate chilled water by means of absorption technology. Absorption chilling technique utilizes de-ionized water as the refrigerant and a solution of Lithium Bromide (LiBr) as the absorbent.
The use of absorption chillers prove to be extremely efficient. An Auxiliary Boiler is installed at our co-generation plants to supplement steam production. For plants where no Gas Turbine and Boiler is available, GDC make use of Direct Gas Fired Absorption Chiller instead of Steam Absorption Chiller.
Absorption machine has no moving parts except small pumps to used to circulate the LiBr solution and to purge unwanted gaseous from the chiller to maintain vacuum condition inside the chiller. GDC utilizes modern double-stage absorption machines in our various plants.