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According to EMSD research, Heating, Ventilating and Air-Conditioning Systems (HVAC) account for 24% of energy consumption in commercial sector. Choosing the right energy-efficient HVAC equipment is crucial since it accounts for a high proportion of overall energy consumption.

Oil-free Centrifugal Chiller

  • Oil-free Centrifugal Chiller equipped with synchronous brushless DC permanent magnetic motor and magnetic bearing (no lubricating oil) which compressor can be run at a high rotating speed (18000 to 48000 rpm) through a variable speed drive control
  • Without physical contact and lubricating oil, the chiller therefore can run in low friction and high speed operation to achieve energy saving
  • During the half load period, it can save 20-30% energy consumption compared with traditional centrifugal chiller

Chilled Beam System

  • Chilled Beam System should be equipped with dedicated primary air handling unit, primary air ductwork, chilled beam devices (active or passive), and chilled water networks (chilled water supply temperature at 16℃ to 18℃)
  • Active chilled beam system can induce air flow across its cooling coils. It can cool and circulate the air in the conditioning space. Passive chilled beam used radiation heat transfer to absorb heat energy from conditioning space. Primary air will supply to the conditioning space through individual air diffuser
  • It’s advantage included low noise and reduce energy consumption for both ventilation fans and chiller unit
  • The level of comfort is same even the temperature of air supply from Chilled Beam System is slightly higher than other air conditioning system. It is energy saving and can saves up to 10% energy consumption compared with traditional VAV boxes

Variable Frequency Drive (VFD) Fan Coil

  • Variable Frequency Drive (VFD) Fan Coil Unit equipped with DC brushless permanent magnetic motor and fan speed controller
  • Compared with traditional AC motor, DC motor is more energy-efficient in the low and middle speed operation range
  • Under half-load condition, it can save up to 30% energy consumption as compared with traditional fan coil system

Variable Frequency Drive (VFD) for Air-conditioning System

  • Variable Frequency Drive (VFD) application on motor for ventilation exhaust fans, water pumps and compressors
  • It can achieve better energy saving by demand energy management. For example, the air flow rate of ventilation fan in car parks can be reduced in night time or low demand period
  • Through reducing air or water flow rate by 20%, the Variable Frequency Drive can save up to 50% of energy

Water-cool Chiller System

  • A Water-cool Chiller uses fresh water or seawater to absorb heat, enhancing heat dissipation for its condenser unit. Its coefficient of performance (COP) is higher than that for an Air-cool Chiller
  • Energy savings of over 30% can be achieved by replacing an Air-cool Chiller with a Water-cool Chiller

Heat Recovery Chiller System

  • Heat Recovery Chiller System produces both cooling energy and heating energy and is very suitable for buildings with such requirements. For example, a hotel or hospital can make use of the waste heat from chillers for its central air-conditioning system and water heating applications
  • The heating coefficient of performance can reach over 3 and it can reduce over 60% energy consumption compared with traditional water heater

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