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ORC plants

  • ORC plants

    ORC plants

    Currently, two small high-temperature ORC-modules are installed on the landfill area in Flörsheim-Wicker. Heat source for the process is the hot exhaust gas from the biogas engines. Thus, the efficiency of the biogas power plant increases distinctly. 

    Basic scheme of an ORC plant
    © Fraunhofer UMSICHT
  • Technology

    Technology

    The function principle of an Organic Rankine Cycle is comparable to a steam power process (Rankine cycle). The only difference is the used hydrocarbon as working fluid that effects lower process pressures and temperatures.

    In the first process of the thermodynamic cycle, the feed pump pumps the working fluid from low to high pressure. Afterwards, the working fluid is vaporized in the evaporator through heat supply. The vapour expands through a turbine and generates power. The vapour then enters a condenser where it is condensed at a constant pressure to become a saturated liquid. For heating purposes , the excessed heat is dissipated to a cooling circuit.

    Process principle of the Organic Rankine Cycle
    © Fraunhofer UMSICHT
  • Technical Data

    Technical Data

    • Initial start-up: 2012
    • Installed electrical power: 0.36 MW
    • Power production (2013): 1.17m kWh/a.