METI / ECCJ / ACE Training Program MTPEC04 (2006.02)

2. Energy Conservation Technology for Buildings
Energy saving control on air-conditioning system
(Outside air intake control depending on indoor CO₂ concentration,
zero energy band control)

2. Energy Conservation Technology for Buildings
Introduction of free cooling (cooling using outside air) for air conditioning

What is free-cooled air conditioning?
- Using low temperatures of outside air, chilled water is produced in a cooling tower for air conditioning.
- Normally, cooling towers are shut down in the winter season (around November through to around April), but this system is continuously run throughout the year. In winter, the system produces 7°C level cool water, which is used as heat source for air-conditioning

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