Modernising the energy supply of University Medical School

A modern, decentralised energy and heat supply will bring production closer to consumers in the future. For this purpose, three large cogeneration units were implemented: one at the university hospital and two at the university.

Fifty percent of the electricity requirement
At the end of September 2017, the 'heart' of the new combined heat and power plant of UMG, a gas engine with generator, was delivered. A heavy-duty crane lifted the 53 tonne unit into the new building. The engine and generator alone account for around one million euros. Since the end of 2017, the first of the three power plants has now been supplying about half of the electricity required and the basic heat requirement of the university hospital.

The 4.5MW cogeneration plant was developed and supplied by ETW Energietechnik, the Moers-based specialist for power plants. It contributes around 50% to the electricity requirements of the University Hospital Göttingen. The total efficiency of the energy utilisation, electricity and heat output, amounts to about 90%.

Contribution to climate protection
The state of Lower Saxony will bear the costs of around €4.7m euros from the August 2014 'Rehabilitation Programme for University Medicine of Lower Saxony', but the investment will not only save energy costs; security of supply and the saving of 6,500 tonnes of carbon dioxide per year will also make an important contribution to climate protection.

Security of supply elementary core component
Security of supply in particular is a key element of the new energy concept. The University Medical School Göttingen (UMG) as a clinic of maximum care has an annual heat energy requirement of more than 33,000 private households. For this purpose, the waste heat from the engine and the hot exhaust gases are decoupled and used for their own use. UMG relies on a cogeneration plant for the generation of heat and electricity, which generates energy particularly efficiently with continuous heat output. It has a heat output of 4.75MW and has a 33m high chimney stack.

Base load of heat supply
Since January 2018, around half of the electricity required in the university hospital has been produced, thus covering the basic load of heat supply for the hospital. The heat is mainly used to heat the drinking water and for the room heating of the central hospital building. The energy-efficient plant technology of the CHP reduces the consumption of resources and reduces environmental pollution and emissions.

"The new combined heat and power plant is thus an important contribution and a good example of the integration of biogas into sustainable and modern energy supply concepts," summarised Dr. Oliver Jende from the sales department of ETW Energietechnik in Moers.

Power generation close to main consumers
The two subfoundations University Medicine Göttingen (UMG) and the University of Göttingen coordinate their joint 'energy policy' and founded the Universitätsenergie Göttingen in 2009. Their goal: Both partners want to use the energy required for the foundation university efficiently, in an environmentally friendly and cost-effective manner. The core of the energy supply concept is to bring power generation close to the main consumers in order to minimise transmission losses.

The UMG has an annual electricity requirement of about 57,000 MW-hours of electricity and about 100,000 MW-hours of heat, the university of 50,000 MW-hours of electricity and 67,000 MW-hours of heat. In the UMG, electricity and heat are also used for central cooling production.