PerformanceOffice air conditioning case study
Energy-saving in heating is also achieved.
Capacity saving limit control (during light-load heating)
February 2009 actual record (daily basis)
Control contents
Consulting with customer about the balance between comfort and energy saving. The power consumption is reduced by saving the outdoor unit capacity.
Control results
Comparison of performance with and without control
* Measurement conditions and time: Tuesday, February 3, to Tuesday, February 24, 2009
- Power, operating hours, refrigerant temperature, and other readings were calculated by analyzing data stored by the air conditioner.
- Weather data values were used for outdoor temperatures.
* Under light-load operation, comfort can be maintained yet energy-saving control works effectively.
| Control status | Air conditioner hours | Outdoor temperature | |
|---|---|---|---|
| High | Average during operation | ||
| Control ON | 9:00 to 18:00 | 9℃ | 5 to 6℃ |
| Control OFF | 9:00 to 19:00 | 9℃ | 5 to 6℃ |
Building and equipment overview
Client:Wuxi, China (in the suburbs of Shanghai), Building D (office building)
VRV type air conditioner (total: 24hp)
Start of energy-saving control: February 2009
Reduction result: 28% reduction in air conditioning power consumption
Japan's Energy-Saving prize awarded
The 5th Eco-Products Awards Minister's Prize, the Ministry of Environment (Eco-Services Category)
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