|
1. Name of example.....ANA Hotel Tokyo Energy Conservation Retrofitting
2. ESCO.....Yamatake Building System Co., Ltd.
3. Facility overview
|
Contract demand
|
3,600 kW |
Receiving voltage |
22 kV |
| Number of stories |
Three stories below ground and 37 stories above ground |
Air-conditioning facility |
District heating and cooling (chilled water and steam) |
| Total floor area |
98,000 m2 |
Air-conditioning scheme |
Central air conditioning, fan coil unit and packaged air conditioner |
4. Energy conservation techniques
|
Air conditioner inverter control
|
Inverter control of air conditioner fan according to room thermal load |
| CO concentration control of parking area ventilation |
Inverter control of parking area exhaust fans according to CO concentration |
| Fresh air intake control based on CO2 concentration |
Control of fresh air intake according to indoor CO2 concentration |
| Introduction of heat-insulating film |
Covering of exterior windows of guests’ rooms with heat-insulating film to reduce thermal load component attributable to outside air |
| Introduction of BEMS |
Energy conservation through optimization of operating hours of facilities and equipment and thermal/humidity environment according to load conditions |
5. Finance Self-financing
6. Utilization of assistance measures.....High-Efficiency Housing/Building Energy System Introduction Promotion Program
7. Type of contract and contract duration..... Guaranteed-savings, three years
8. Owner benefits - sales points
Although the hotel is open for business twenty-four hours a day all year round, the air-conditioning load fluctuates from season to season and hour to hour. In this regard, the project will make it possible to optimize the operation of the air-conditioning system by automatically changing its output according to load conditions, thus eliminating energy wastage, and this is its greatest benefit.
9. Client's comments
The introduction of the energy conservation system has been delivering the expected energy savings. In fact, BEMS-based energy data analysis has brought about an even higher energy efficiency by inducing more energy-conscious building operation.
10. Problems encountered at time of introduction and solution measures
As the project was implemented while maintaining normal business activities, close consultations were held in advance regarding the equipment delivery schedule, working hours, etc.
11. Energy conservation equipment used
12. Energy savings achieved
Energy consumption before ESCO project 388,669 GJ/year
Energy consumption after ESCO project 307,921 GJ/year
Reduction in energy consumption 80,748 GJ/year (20.8% reduction)
|
