The use of air conditioning in Hong Kong attributes a large proportion of our total electricity consumption, due primarily to its geographic location and economic activities.

In 2017, air conditioning accounted for 31% of the total electricity consumption. Our electricity consumption by air conditioning had a growth of about 7% from 45,298 Terajoule (TJ) to 48,829 TJ from 2007 to 2017. The use of air conditioning is expected to grow further in view of our increasing population and economic activities. We therefore need to take measures to improve our energy efficiency, in particular, on air conditioning.

• Displacement ventilation
• Heat recovery equipment for air-side equipment
  • Thermal wheel and Desiccant total energy heat recovery wheel
  • Heat Pipes
  • Run-around coils
• Liquid desiccant air conditioners
• Microchannel heat exchanger
• Radiant ceiling cooling

• Scale control technologies in water-side system
  • Automatic tube cleaning system
  • Dynamic-type pulsed-power devices (PPD)
  • Static-type magneto-hydrodynamic devices (MHD)
• Heat recovery equipment for water-side equipment
  • Plate Heat Exchangers
  • Heat recovery chiller
• Thermal energy storage
• Water-cooled air conditioning system
  • Cooling Tower Scheme
  • Central Sea Water Scheme
• District Cooling Scheme

• CCMS

• Anti-ultraviolet film
• Heat pump in air-conditioning applications
• Electronically commutated permanent magnet motors
• VRV
• Variable speed drive

• All variable speed chilled water plant control
• Adaptive or Fuzzy logic control
• Novel thermal energy storage
• Oil-free centrifugal compressor
• Solid state refrigerant