PerformanceOffice air conditioning case study
Enjoy energy savings with little affection in comfort.
Refrigerant temperature control
June 2007 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: Wednesday, June 6, to Friday, June 8, 2007
- 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.
* The system delivers energy savings without discomfort and feeling noticing use of the control operation.
| Control status | Air conditioner hours | Average setpoint | Weather | Outdoor temperature | |
|---|---|---|---|---|---|
| High | Average during operation | ||||
| Control ON | 7:50 to 19:00 | 23.8℃ | Clear | 27.1℃ | 26.0℃ |
| Control OFF | 7:50 to 19:00 | 23.7℃ | Clear | 27.9℃ | 26.1℃ |
Building and equipment overview
Client: Japan Building A (office and mixed-use building)
VRV type air conditioner (total: 26hp)
Start of energy-saving control: February 2007
Reduction result: 34% 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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