Speaker
Description
DESY is upgrading its storage ring X-ray light source PETRA. The entire machine is being replaced, but the old tunnel will continue to be used and requires a stable ambient temperature. The optimize thermal design parameters, the energy consumption, as well as the related operation cost and co2-emissions, of the Petra IV’s tunnel climatization have been investigated for different tunnel temperatures from 21 up to 30°C as well as different cooling water temperatures (25 and 30°C).
Additionally, the influence of the extended shut down period in winter versus an extended shut down period in summer have been compared.
For the study, the different tunnel sectors have been modelled and simulated by using simple energy conservation laws.
With the use of a sensitivity analysis of the ecological and economic parameters, an appropriate tunnel temperature has been chosen.
