PerformanceOffice air conditioning case study
Responsive to rapid outdoor temperature fluctuations.
Refrigerant temperature control (during cooling peak)
June and July 2008 actual record (daily basis)
Control contents
Power consumption is reduced with almost no effect on the indoor temperature by increasing the indoor unit refrigerant temperature.
Control results
Comparison of performance with and without control
* Measurement conditions and time: Tuesday, June 24, to Thursday, July 31, 2008
- 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.
* With keeping a moderate temperature setting constant, the energy savig is achieved with maintaining comfortable condition by evaporating temperature control even under high outdoor temperature.
| Control status | Air conditioner hours | Outdoor temperature | |
|---|---|---|---|
| High | Average during operation | ||
| Control ON | 8:00 to 21:00 | 34℃ | 31 to 32℃ |
| Control OFF | 8:00 to 21:00 | 36℃ | 31 to 32℃ |
Building and equipment overview
Client: Lyon, France (in Central France), Building C (office building)
VRV type air conditioner (total: 14hp)
Start of energy-saving control: June 2008
Reduction result: 36% 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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