The following are some of the success stories of companies funded by EASe. Through the implementation of the energy conservation and efficiency measures identified by the ESCO, companies have reaped significant energy and cost savings.
| Sector |
Company |
Annual Savings achieved |
Implementation Costs |
Payback Period |
Measures implemented |
| Industry |
Systems on Silicon Manufacturing Co. Pte Ltd (SSMC) |
S$319,000 2456MWh |
S$74,000 |
0.23 year |
Optimisation of chillers
- The optimal level of refrigerant charging was determined for best chiller efficiency and controller was implemented to maintain optimal performance under all operating/loading conditions.
|
| Singapore Oxygen Air Liquide Pte Ltd (SOXAL) |
S$324,000 2,160MWh |
S$266,000 |
0.82 year |
Shutting down of chiller plant at night
- Before the implementation of this measure, the chiller plant was operated 24 hours daily although the facility only operates from 8am to 7pm on a 5.5-day week. The main reason for this was to prevent condensation from taking place. The shutdown sequence was modified such that the AHUs are switched off only after a period of time where the supply, exhaust and scrubber fans have stopped operation. This minimised condensation problems.
Retrofit of chiller plant
- The existing chillers and associated pumps were replaced with more efficient ones. System efficiency improved by 38%.
Optimisation of chilled water pumps
- Variable speed drives were installed on the new chilled water pumps, allowing them to run relative to the cooling load demand
Optimisation of chilled water primary pumps
- The pumps were optimised by converting direct-on-line to variable speed drive that supplies power to the pumps at reduced speed depending on pressure.
|
| Building |
Singapore Post Center |
S$1.2 million |
S$2.0 million |
1.7 year |
The chiller plant system efficiency is improved from 1.1 kW/RT to 0.6kW/RT via the following measures
Chiller replacement
- 3 of the existing chillers were replaced with more efficient ones
Optimisation of pumps and cooling towers
- Variable speed drives were installed to the pumps and cooling towers.
|
| Singapore Airline House |
S$212,000 1,196,000 kWh |
S$200,000 |
0.9 year |
Optimization of pumps and cooling towers
- A 20% improvement in chiller plant system efficiency was achieved by installing new condenser pumps and installing variable speed drives to chilled water pumps and cooling towers.
|
