Turboden, a group company of Mitsubishi Heavy Industries, has signed an order with Geothermie Holzkirchen GmbH for an ORC turbogenerator that exploits geothermal brine from a deep geothermal well, for the production of electricity and heat for the district heating network.
Geothermie Holzkirchen GmbH, is a wholly owned subsidiary of the local utility of Holzkirchen, a town located just south of Munich, in the upper Bavaria, Germany. The company began planning a deep geothermal project in 2015 to feed the local grid of renewable electric energy and provide clean thermal energy for household connected to the district heating network.
In 2017, the company selected Turboden to supply the complete ORC geothermal power station including equipment, control system of the power plant, construction at site, and commissioning.
The solution proposed by Turboden will maximize the Net Present Value of the business plan with combined heat production and electricity generation, with expected yearly revenues exceeding $7.1 million.
Turboden will employ a double pressure level process, with proprietary turbine, process and air cooled condenser. To provide a turnkey solution, a consortium will be established with the partner company Th. Arens Anlagenbau GmbH.
While pure heat geothermal energy projects are less profitable during the summer due to lack of heat demand, more electricity can be produced in a combined heat and power project in the summer and heat supply in the winter. This means an optimum economic exploitation of the available geothermal water.
The plant is currently under construction and is expected to be in operation by the first quarter of 2019.