After a multimillion-dollar absorption cooler burned down shortly after it was put into operation, the technical department of the Max Delbrück Center for Molecular Medicine in Berlin was in search of a company that really knew its way around this technology. The specialists at En.plus GmbH took up the challenge and were awarded the contract for the tricky project.
Work on the research campus began with the dismantling and removal of the defective machine and the costly disposal of the boiled-out lithium bromide mixture by a specialist company. But before that, a safety concept for the new plant had to be devised. Hydraulically, the machine was to be almost identical in design, but revised in terms of safety. Numerous rounds of coordination between the engineers of En.plus and the client followed until the solution was found and the production of the plant could be ordered. After conversion to decentralized emergency operation on the campus, the necessary adaptation work on the hydraulics of the overall system began. Then the new machine could be integrated into the system. Cold, cooling and hot water lines were connected and the exhaust system of the two combined heat and power plants was elaborately adapted to the new absorption chiller. The final challenge was the commissioning, which had to be carried out unexpectedly by remote access due to the first lockdown during the Corona pandemic. After three sleepless nights, we could finally exhale a sigh of relief: the commissioning had been successful. Since then, the plant has been operating flawlessly.
Max-Delbrück-Centrums für Molekulare Medizin
I've never been as excited as I am here on this project.
Two-stage absorption cooler 1.115 MW, weight 17 tons (lithium bromide refrigerant)
WT free cooling 1.5 MW
Buffer tank 12 m3
3 hybrid pressure coolers 1.7 MW each
Integration into existing system with 3 water-cooled CCMs
Adjustment to the exhaust gas system of the two CHP units
Integration into the building control system