Description of the building:
| China United Plaza is a commercial complex with 27 floors of offices. Fully air-conditioned with air-cooled central chilled water system, differential pressure by-pass, constant speed pumps. |
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Retrofitted initiative:
- Converted the air-cooled chiller to high-efficiency Plate-tube evaporative water-cooled chiller.
- Installed the auto-cleaning devices which is physical water treatment and auto-cleaning system for condensers of water-cooled chillers.
- Installed a real time monitoring and control system to optimize the chiller plant operation efficiency.
Observed benefits other than energy saving:
Real time information and knowing the chiller plant operations
More information for chiller monitoring and reporting
Shorten start up time of chiller plant operation
More environmental friendly as no chemical dosing for water cooling tower
General observations of the retrofitting project:
- HVAC system retrofit have not affected the factory operation
- Easy to installation, just plug and play, shorten retrofitting period and save retrofitting materials as well
- Easy to maintenance and reduce maintenance resources in overall plant operations
- Standard retrofitting initiatives with proven and straightforward technologies
Other information:
| Cost |
Saving |
| Total cost: |
HKD 3.3 million |
Total savings/year: |
HKD 0.6 million |
| Cost breakdown: |
Chiller Plant: HKD 1.29 million
Mechanical and Electrical work: HKD 2.01 million
(CLP Eco Building Fund supported: HKD 0.4 million) |
Savings/year breakdown: |
>33% reduction in energy consumption compared to the predecessors |
| Payback: |
4.83 years |
| Name of consultant and contractors: |
Subsidy/ Funding |
| Consultant: Ir. W. Man Luk - Lee Yu Kee Technology Ltd. |
The project is supported by: |
CLP Eco Building Fund |
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