A Holistic Energetic Transformation Concept for the Heating and Cooling Supply of a University Campus
Abstract
In order to achieve the highest CO2 savings at a district level, a holistic planning of the renovation process is necessary, in which the synergies between building retrofitting and the modernization of the energy supply are taken into account. In this study, an integrative energy retrofitting approach is applied to a small area of a university campus. It is shown that building renovations create valuable opportunities for the transformation and decarbonization of the heating and cooling supply. By considering specific boundary conditions during renovation, previously untapped waste heat potential from data centers and process cooling can be locally used for building heating, leading to CO2-savings of 850 t/a. A modernization of the district heating network and the usage of a seasonal geothermal storage further increase the CO2-savings up to 1200 t/a. Furthermore, the presented concept is economically attractive, with a payback period of 6-9 years and a levelized cost of energy of max 5.9 €cent/kWh.