• The Cygal Hotel and the Cygal Towers A &B
• The Atlas Towers A to F
• Menara Telekom and Wisma Telekom
• Tenaga Head Quarters (TNB)

Objective

To take advantage of the lower electricity tariff during the night, the Cristopia Thermal Energy Storage System (STL) is used with the purpose of storing thermal energy during the night for use during the day.     

It has enabled the client to minimize the installed cooling capacity and to increase the plant efficiency.

Technical Data

Characteristics

The plant consists of 5 centrifugal chillers (3500 kW each) working in conjunction with 5 cylindrical STL steel tanks of 380 m³ (3.80 m diameter, 35 m long). Two conventional water chillers are used for the base load.
Each brine chiller operates with one STL and one heat exchanger to provide brine at 3.3°C at the primary side of the heat exchanger. Each loop (5) operates independently of the others.

The chillers and the STL's can be operated singularly and separately or in any combination to cater for the demand, and the decision for their operating status during the day is based on the objective of minimizing the use of the chillers and depleting the energy stored.

Technical Advantages

Smaller chiller capacity
Smaller heat rejection plant
Reduced maintenance
Efficient and reliable system
Increase of the plant life time
Flexible system available for efficient energy management

Projects Credits

Customer: Bangsar Energy Systems SDN BHD (subsidiary of TNEC)
Consultant: KJ Engineering
Installing Company: KJ Engineering

DCS with STL simply means lower
capital cost and lower
operating costs!

Financial Advantages

Saving on operating costs, maintenance, demand charge and off peak consumption
Lower initial investment