As part of the project, a total of 500 parabolic trough collectors (approx. 4,500 m2 net area) will be installed worldwide, the largest system of this type, which will concentrate the sun’s rays on absorbers in the middle of the collectors. The hot water 170-180 ° C (PN16) obtained in this way is converted into cold in a two-stage absorption chiller and excess energy is stored in a storage tank (high-temperature storage), so that the energy requirements of the system are covered by solar thermal energy, even during the night or on sunny days can be. As a result, the excess radiation energy is not lost, but is made usable. With the help of a heat exchanger and other components, the energy is transferred to the secondary circuit, which is then responsible for heating the production facility. In summer, an average of 3,000 kW (3,500 kW peak) of usable solar cooling is provided. If the stored solar heat is not sufficient for night-time operation in summer operation, the necessary additional heat is provided by a boiler; this also applies to winter operation. The solar coverage of the thermal energy demand of the Mayr Melnhof Graphia production plant achieved through this project amounts to 80% of electricity consumption in summer and an average of 60% natural gas consumption in winter.

3,040 tons of CO2 (equivalent) / year

Process cooling, room cooling and warm water for a carton board manufacturer.