Cities and municipalities are often faced with the task of converting former industrial areas, barracks, etc. into residential areas. So-called district concepts are usually the basis for decision-making. A multitude of questions have to be considered. An important point is the energy supply of such new residential areas. By working out different supply variants, these can be compared with each other.
Many municipalities are currently faced with the task of converting former industrial areas into residential areas. This requires well-founded concepts, so-called district concepts. A multitude of issues must be taken into account. One important point is the energy supply of such new residential areas. By developing different supply variants, these can be compared with each other. This is then the basis for an ecologically and economically sustainable decision.
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The now outdated woodchip heating system was replaced by a new model. For this measure the appropriate subsidies were researched and applied for.
In order to further anchor climate protection in the urban area, the municipal utility Baiersdorf (SK-B) commissioned eta Energieberatung to carry out a project study at the end of 2017. For the local secondary school and surrounding buildings (including residential buildings) it had to be shown how a sustainable heat supply can be set up in a heating network.
The new concept envisages using a heat pump to raise the temperature level of the low-temperature waste heat generated in the condensation power plant. The waste heat can then be integrated into the production process in combination with a CHP plant and a pre-dryer. This results in annual energy cost savings of approx. 1 million €.
By implementing an innovative steam generation system using CHP, consisting of a conventional steam boiler with micro gas turbine and gas turbine exhaust gas burner, renewal of the steam distribution system with a pure steam generator and a new ventilation system to supply highly hygienic areas, CO2 emissions were reduced by almost 20 %.
In Taufkirchen (Vils), a district heating network with a route length of approx. 5,200 m and 41 heat transfer stations was built. The base load requirement is covered all year round by combined heat and power plants. In addition, a community-owned conventional peak and reserve system was also set up.
The waste heat of a local foundry was integrated into the existing heating network. The existing district heating network was extended to connect a school centre. In the course of this, extensive conversion and expansion measures were carried out on the existing hydraulic and control technology and a buffer storage tank was installed.
eta Energieberatung provided a rough analysis for the evaluation of measures to reduce energy costs. The areas of waste heat utilisation, cooling water, electric drives and fans, lighting optimisation, own power generation, renewable energies and support measures were included.
In Engelsberg, a biomass heating plant with a capacity of 1,700 kW and a district heating network with a route length of approx. 7,400 m and 180 heat transfer stations were built. Afterwards, the biomass heating plant and the district heating network were optimised during operation.
At Lauterbach castle, which has been owned by the von Hundt family since the 15th century, the oil heating system was replaced by a woodchip heating system. A neighbouring house is also supplied with heat by this system. eta Energieberatung was commissioned with the planning of the wood chip heating with connected local heating network.
After successful cooperation with the wood pellet plant, the Stadtwerke Wunsiedel also relied on the technical support of eta Energieberatung for this local heating concept with a wood gas cogeneration unit and pellet boilers.