References
Branch: Bank
Pictet & Cie., Geneva, Switzerland
Project
The private bank Pictet & Cie. wishes to reduce its CO2 emissions. An important factor in this process is a continuous reduction in the use of fossil fuels to heat and cool the buildings. The solar cooling and heating system is a clear commitment on the part of the bank to do something for the environment on a sustained basis. It can reduce its consumption of heating oil and can consequently cut its CO2 emissions.
Task
The project required the installation of 364 solar vacuum tube collectors to function together with the three YAZAKI WFC systems. The YAZAKI water-fired chillers employ the water heated by solar thermal energy to drive the simple absorption cooling, using an environmentally friendly solution of water and lithium bromide as a fluid. This makes it possible to cool the closed circuit water to 9°C in order to air-condition the bank building.
Solution
Solar cooling facility consist of
- 364 solar collector installed over an area of 600 square meters
- 3 absorption chillers, YAZAKI WFC-SC 20
Technical data of the installed YAZAKI absorption chillers
- 3 YAZAKI Li-Br absorption chillers, type WFC-SC 20
- 70 kW cooling output (max. 85 kW)
- Hot water: 88 to 83 °C (inflow min. 70 °C / max. 95 °C)
- Hot water volume flow rate varying between 30 and 100 %
- Cold water: 12.5 to 7 °C (outflow min. 6 °C)
- Cooling water: 31 to 35 °C (inflow min. 24 °C / max. 34.5 °C)
- COP: 0.7
