Building Investment (November-December 2020)

Description
Chiller System
Menara Weld (Office)
Tower Chiller Plant
The Weld (Retail Mall)
Podium Chiller Plant
Old Chiller Plant (constant
speed water-cooled screw
chillers) Tonnage &
Configuration
System Efficiency (kW/ton)
1.90
1.90
New Chiller Plant
(Variable speed watercooled
screw chillers)
Tonnage & Configuration
Audited Best System
Efficiency (kW/ton)
0.65
significantly.
In addition to chiller replacement, the retrofitting exercise
also involved the replacement of chilled water pumps and
condenser water pumps to highly efficient variable speed
pumps. The cooling towers were also replaced and fitted with
variable speed cooling tower fans. The entire chiller plant was
converted into a variable-primary-flow configuration controlled
by a dedicated Chiller Management System. Further, all Air
Handling Units (AHUs) control valves were replaced with Pressure
Independent Balancing Control Valves (PIBCV) and all damaged
Variable Frequency Drives for the AHUs were also replaced.
Moreover, the carpark lights have been changed to the more
energy efficient LED light prior to the chiller replacement exercise.
With all the energy conservation measures implemented, the
annual electricity saving is 3,910,239kWh/year as reflected on the
electricity bills, which is equivalent to a 38.70% reduction. The
Return of Investment (ROI) is below four years.
PRIMETECH Engineers Sdn Bhd (Co. No. 211469-P)
19B & 21B, Jalan 17/45, 46400 Petaling Jaya, Selangor, Malaysia.
Tel: +603-7958 3655
Fax: +603-7956 3660
E-mail: primetech19@gmail.com
Nov-Dec 2020 | www.b-i.biz 29