|
Building Owner
|
Chinese YMCA of Hong Kong
|
Replacement of more efficient chiller
Conversion to variable speed chilled water pump
Replacement of traditional 3-speed FCU to variable speed FCU with permanent magnet motor
Using electronically commutated (EC) plug fan in AHU / PAU / CRAC
Provision of Smart Metering
Using AI solution and data mining technologies to optimise energy efficiency and operational performance for major equipment and building services systems
| | Building/Project Name |
Chinese YMCA of Hong Kong, Kowloon Centre
| | Systems |
HVAC - Waterside Air Conditioning System
HVAC - Airside Air Conditioning System
Electrical System - Electricity Distribution System
Smart control Platform
| | Building Types |
Commercial - Hotel & Hostel/Apartment
Others - Recreational
|
Description of the building:
3 Block building, consisting of 15 floors of hotel, and 9 floors of mixed public recreational facilities, activity rooms and office.
Fully air-conditioned, with air-cooled central chilled water system and split-type air-conditioning units.
Traction motor lift. |
|
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Retrofitted initiative:
HVAC – Waterside air conditioning system
- Replacement of more efficient chiller: Renew of aged chiller units to more efficient chiller units with variable speed drives.
- Conversion to variable speed chilled water pump
- Conversion of chilled water system to variable flow system, with necessary sensors and controllers to adjust flowrate of chilled water in accordance to chiller unit load.
HVAC – Airside air conditioning system
- Replacement of FCU with DC motor: Retrofitted traditional AC motors in FCU with DC motor drives, which is connected to BMS system for central control.
- Using EC plus fan in AHU/ PAU
- Retrofitted EC plug fans to existing AHU/ PAU, and conversion to demand control fresh ait system by carbon dioxide sensor and modulating damper.
Electrical system:
- Provision of Smart Metering
- Energy consumptions of the systems, including Lift escalator, lighting, pumps are logged for analyzing consumptions, trends and Retro-Commissioning projects in future.
Smart Control Platform:
- BMS system with AI solution and data mining technology
- HVAC system including Chiller units, chilled water pumps, PAU/AHU, FCU; and lighting systems, is connected to BMS system.
- Chiller plant data is analyzed by AI technology to optimize running parameters and scheduling for energy savings.
Observed benefits other than energy saving:
- Quieter operation of upgraded chiller units, PAU and FCU.
- Reduced maintenance resources in plant operation and future Retro-Commissioning and balancing.
- Reduced maintenance resources in plant operation and future retro-commissioning and balancing.
- Overall systems monitoring for planning of running schedules, fault monitoring, and preventive maintenance planning.
General observations of the retrofitting project:
Retrofitting initiatives with proven technology, and straightforward.
Other information:
| Cost |
Saving |
| Total cost: |
HKD 33.5 million |
Total savings/year: |
HKD 2,850,000 |
| Cost breakdown: |
(1)Replace chiller units and chilled water pumps: HKD 8.5 million
(2)Retrofit DC motor and EC plug fans: HKD 19.5 million
(3)Modification of Smart Control Platform + Electrical system: HKD 5.5 million |
Savings/year breakdown: |
(1)Chiller units and chilled water pumps replacement:
920,000 kWh (Chiller units and chilled water pumps replacement)
(2)Retrofit DC motor and EC plug fans
480,000 kWh
(3)Modification of Smart Control Platform + Electrical system:
500,000 kWh
(1)+(2):HKD 2,100,000; (3): HKD 750,000 |
| Payback: |
11.75 years
For (1) & (2): 13 years
For (3): 7.3 years |
| Name of consultant and contractors: |
Subsidy/ Funding |
| Consultant: ISPL Consulting Limited |
The project is supported by: |
HKJC |
| |
|
Replacement of more efficient chiller
Conversion to variable speed chilled water pump
Replacement of traditional 3-speed FCU to variable speed FCU with permanent magnet motor
Using electronically commutated (EC) plug fan in AHU / PAU / CRAC
Provision of Smart Metering
Using AI solution and data mining technologies to optimise energy efficiency and operational performance for major equipment and building services systems
|
|
|
Building Owner
|
Chinese YMCA of Hong Kong
| | Building/Project Name |
Chinese YMCA of Hong Kong, Kowloon Centre
| |
Systems |
HVAC - Waterside Air Conditioning System
HVAC - Airside Air Conditioning System
Electrical System - Electricity Distribution System
Smart control Platform
| |
Building Types |
Commercial - Hotel & Hostel/Apartment
Others - Recreational
|
Description of the building:
|
|
3 Block building, consisting of 15 floors of hotel, and 9 floors of mixed public recreational facilities, activity rooms and office.
Fully air-conditioned, with air-cooled central chilled water system and split-type air-conditioning units.
Traction motor lift. |
|
|
Retrofitted initiative:
HVAC – Waterside air conditioning system
- Replacement of more efficient chiller: Renew of aged chiller units to more efficient chiller units with variable speed drives.
- Conversion to variable speed chilled water pump
- Conversion of chilled water system to variable flow system, with necessary sensors and controllers to adjust flowrate of chilled water in accordance to chiller unit load.
HVAC – Airside air conditioning system
- Replacement of FCU with DC motor: Retrofitted traditional AC motors in FCU with DC motor drives, which is connected to BMS system for central control.
- Using EC plus fan in AHU/ PAU
- Retrofitted EC plug fans to existing AHU/ PAU, and conversion to demand control fresh ait system by carbon dioxide sensor and modulating damper.
Electrical system:
- Provision of Smart Metering
- Energy consumptions of the systems, including Lift escalator, lighting, pumps are logged for analyzing consumptions, trends and Retro-Commissioning projects in future.
Smart Control Platform:
- BMS system with AI solution and data mining technology
- HVAC system including Chiller units, chilled water pumps, PAU/AHU, FCU; and lighting systems, is connected to BMS system.
- Chiller plant data is analyzed by AI technology to optimize running parameters and scheduling for energy savings.
Observed benefits other than energy saving:
- Quieter operation of upgraded chiller units, PAU and FCU.
- Reduced maintenance resources in plant operation and future Retro-Commissioning and balancing.
- Reduced maintenance resources in plant operation and future retro-commissioning and balancing.
- Overall systems monitoring for planning of running schedules, fault monitoring, and preventive maintenance planning.
General observations of the retrofitting project:
Retrofitting initiatives with proven technology, and straightforward.
Other information:
| Cost |
Saving |
| Total cost: |
HKD 33.5 million |
Total savings/year: |
HKD 2,850,000 |
| Cost breakdown: |
(1)Replace chiller units and chilled water pumps: HKD 8.5 million
(2)Retrofit DC motor and EC plug fans: HKD 19.5 million
(3)Modification of Smart Control Platform + Electrical system: HKD 5.5 million |
Savings/year breakdown: |
(1)Chiller units and chilled water pumps replacement:
920,000 kWh (Chiller units and chilled water pumps replacement)
(2)Retrofit DC motor and EC plug fans
480,000 kWh
(3)Modification of Smart Control Platform + Electrical system:
500,000 kWh
(1)+(2):HKD 2,100,000; (3): HKD 750,000 |
| Payback: |
11.75 years
For (1) & (2): 13 years
For (3): 7.3 years |
| Name of consultant and contractors: |
Subsidy/ Funding |
| Consultant: ISPL Consulting Limited |
The project is supported by: |
HKJC |
| |
|
Replacement of more efficient chiller
Conversion to variable speed chilled water pump
Replacement of traditional 3-speed FCU to variable speed FCU with permanent magnet motor
Using electronically commutated (EC) plug fan in AHU / PAU / CRAC
Provision of Smart Metering
Using AI solution and data mining technologies to optimise energy efficiency and operational performance for major equipment and building services systems
|
|
|
