Speaker
Mr
David Reinhard
(PSI)
Description
PSI has started a project recycling heat out of existing and future cooling circuits. The recycled heat will cover 75% of the PSI need by 2017. The heat will be to the greatest extent recycled directly from radio frequency cooling loops of relatively high temperature. Since the yearly power consumption of the institute is a factor 10 higher than the heat consumption, a further increase of the heat recycling would be possible but - depending on the current and unknown future boundary conditions - not necessarily sustainable. A relevant boundary condition for the economy of the project is the existence of a district heating cycle. But it is designed for 120°C, far higher than the temperature of the heat sources. Decreasing the operating temperature is the most cost intensive measure to achieve compatibility between heat source and consumers. However, the leverage of heat recycling is much higher than the most common method of reducing the heat consumption by passive insulation of buildings. At PSI, these buildings have a wide range of conditions and characteristics.
The SwissFEL research facility, which is currently being built, will be of high efficiency through its basic design. Important elements of an efficient infrastructure, in addition to high temperature heat recycling out of RF, will be a cooling system based on optimized use of ground water, an efficient ventilation design and the application of A-class infrastructure components.”
