A central direct seawater-cooled system serving office, mall and hotels.
Each typical office floor is served by two air handling units (AHUs) with pre-treated fresh air.
Retrofitted initiative:
Replacement of Belt-Driven Fan by using Electrically Commutated (EC) Plug Fans Installation for Air Handling Units (AHUs)
Replace the existing AHU belt-driven fans with EC Motor Plug Fans, in order to provide higher motor efficiency with the use of brushless DC-operated motors and better part load efficiency by electronically controlled application of current to sustain optimal motor performance at the operating points.
Airside Electricity Consumption Comparison of Before and After Installation of EC Plug Fan
Observed benefits other than energy saving:
Weekend work required to minimize the disturbance to building normal operation: Each fan replacement done over a single weekend.
Site spatial limitation and access to some whole floor tenant area for retro-fitting.
Existing fan section chamber panels cannot withstand high pressure: Extended site work required for modification of the whole fan section.
Other information:
Replacement of Belt-Driven Fan by using Electrically Commutated (EC) Plug Fans Installation for Air Handling Units (AHUs)
Photos at typical AHU room
Indicative section of AHU equipped with EC Plug Fans
A central direct seawater-cooled system serving office, mall and hotels.
Each typical office floor is served by two air handling units (AHUs) with pre-treated fresh air.
Retrofitted initiative:
Replacement of Belt-Driven Fan by using Electrically Commutated (EC) Plug Fans Installation for Air Handling Units (AHUs)
Replace the existing AHU belt-driven fans with EC Motor Plug Fans, in order to provide higher motor efficiency with the use of brushless DC-operated motors and better part load efficiency by electronically controlled application of current to sustain optimal motor performance at the operating points.
Airside Electricity Consumption Comparison of Before and After Installation of EC Plug Fan
Observed benefits other than energy saving:
Weekend work required to minimize the disturbance to building normal operation: Each fan replacement done over a single weekend.
Site spatial limitation and access to some whole floor tenant area for retro-fitting.
Existing fan section chamber panels cannot withstand high pressure: Extended site work required for modification of the whole fan section.
Other information:
Replacement of Belt-Driven Fan by using Electrically Commutated (EC) Plug Fans Installation for Air Handling Units (AHUs)
Photos at typical AHU room
Indicative section of AHU equipped with EC Plug Fans
