Summary of the “Hungerkamp” System View
Hungerkamp heating & power station connected to a 4 km small district heating network
The “Hungerkamp” project is an innovative initiative led by BS|ENERGY, the energy provider of the city of Braunschweig. The project was triggered by the renovation in a police station. Its old heating installation ran on oil and coal and had to be replaced. It was decided to go beyond mere replacement and to develop a project of green and local heating network for the neighborhood. It is composed of four main components. The CHP unit produces electricity in addition to heat as a base load and is running on biogas all year long. The wood boiler is powered by wood chips and runs from October to March/April as a medium load, to complete the warm water production from the CHP unit during winter times. The natural gas boiler is used for the peak load and as a reserve. The last component is the hot water storage, which enables to balance supply and demand. The local heating network is 4 km long and distributes warm water to 32 customers. The maximal heating demand amounts to 8 MWth. As a result, the innovative heat and power station produces 9,200 MWh per year of 100% green electricity and 15,600 MWh per year of 98% green heat. The whole system replaces 34 old plants running on heating oil and coal and achieves 8,000 tons of CO2-savings, thanks to the use of cogeneration and the replacement of fossil fuels by renewable raw materials. The use of different fuels, as well as the thermal storage allows the system to be flexible to fuel prices and to daily fluctuations.