Landfill transformed into renewable energy site

28 June 2018

WDS Energiedienstleistungen GmbH, a subsidiary of Energie Graz, has just put a unique new heating plant into operation. Arcon-Sunmark, the Danish solar heating specialist, is turnkey supplier of the entire project. The facility will produce heating via three energy sources; solar thermal energy, a landfill and natural gas CHP-engine and a power-to-heat module which can use the produced electricity from the CHP system.

“We are very proud to have been chosen as partner by Energie Graz on this project. The heating plant will be efficient and cost-effective as it benefits greatly from the flexibility of multiple energy sources. Having the plant located on a former landfill is a very good solution for the local community, and in addition it will contribute to lowering CO2 emissions,” says Ole Dalby, Managing director of Arcon-Sunmark.

2.500 m³ storage tank, 2.000 m² solar collector field

The landfill project in Graz is not the first time that Arcon-Sunmark has transformed a polluted site into a renewable energy facility. Another example of this is located in the Danish town Trustrup-Lyngby where a former mink feed factory was demolished and replaced by a solar heating system with a 7.245 m2 collector field.

Storage of surplus energy
The main components of the heating plant in Graz are a CHP (120 kW), a power to heat module (120 kW) and a 2.000 m2 solar collector field together with a 2.500 m3 storage tank which will gather the produced energy. An expansion of the solar heating production is planned and if implemented the collector field will reach a total of 10.000 m2. Additionally the buffer storage tank can take energy out of the grid and deliver it back later when needed again. This gives flexibility to other heat generators in the whole district heating grid.

An expansion of the solar field of total 10.000 m² is possible.