Field trial system for renewable energies

Use of the waste heat from a biogas plant

In 2012 the DeVeTec ORC system was commissioned in the cogeneration unit (CHP) of a biogas plant in Kirchwalsede. For the first time for ORC plants, the waste heat of two biogas engines is used by a single ORC plant. The CHP's waste heat recovery concept remains unaffected by this. Even after the electricity generation from the exhaust gas heat from the CHP, the waste heat of the DeVeTec ORC system still delivers sufficient energy for drying the fermentation residue from the biogas plant.

A two-part heat exchanger of new design ensures reliable operation of the CHP, thanks to its particularly high resistance to corrosion. All components of the DeVeTec ORC system are located in or on a compact 30 ft container. The roof design, with a purpose-developed frame, supports the heat exchanger and, if necessary, also emergency coolers, as well as the chimneys for the exhaust gases from the two biogas engines. This avoided costly foundation work and saved valuable surface area.

The innovative vapour expansion engine in the container can be removed without great effort using an existing mobile crane or a forklift from the side. This minimises maintenance costs and increases the availability of the ORC system.

Because the heat exchanger is positioned outside the container, the DeVeTec ORC system can be rapidly adapted to the relevant heat source.

Use of the waste heat from a biogas plant

In 2012 the DeVeTec ORC system was commissioned in the cogeneration unit (CHP) of a biogas plant in Kirchwalsede. For the first time for ORC plants, the waste heat of two biogas engines is used by a single ORC plant. The CHP's waste heat recovery concept remains unaffected by this. Even after the electricity generation from the exhaust gas heat from the CHP, the waste heat of the DeVeTec ORC system still delivers sufficient energy for drying the fermentation residue from the biogas plant.

A two-part heat exchanger of new design ensures reliable operation of the CHP, thanks to its particularly high resistance to corrosion. All components of the DeVeTec ORC system are located in or on a compact 30 ft container. The roof design, with a purpose-developed frame, supports the heat exchanger and, if necessary, also emergency coolers, as well as the chimneys for the exhaust gases from the two biogas engines. This avoided costly foundation work and saved valuable surface area.

The innovative vapour expansion engine in the container can be removed without great effort using an existing mobile crane or a forklift from the side. This minimises maintenance costs and increases the availability of the ORC system.

Because the heat exchanger is positioned outside the container, the DeVeTec ORC system can be rapidly adapted to the relevant heat source.