District heat network

Normally power plants have an electric efficiency around 40%, most of the remaining energy is lost in heat. Biogas plants use CHP (combined heat and power) units to maintain the required heat in the digesters. However, only about 45% of the produced heat is used for self-consumption.

With a well thought out heat utilisation concept the profitability of an energy generation plant can be increased enormously.

District heating can supply thermal energy to entire communities or industrial areas, displacing fossil fuel that otherwise would be locally consumed; thus, reducing carbon emissions and adding extra income.

bwe Energiesysteme has vast experience on the topic, developing not only heating systems for the biogas digesters but also district heating for industrial estates. Hence, bwe is confident to provide the following services with great results:

  • turnkey implementation from design planning to initial start-up
  • Maintenance of existing heating networks, including water treatment.
  • Development and implementation of intelligent controllers for the optimal heat utilisation

Local and district heat network for a large industrial estate.

A district heat network with a transmission route length of 5 km was installed in a large industrial estate in Germany. bwe extended an existing local heat network to such an extent that the complete industrial estate could be supplied with heat.

The Centrepiece of this district heat network is an energy central from which electricity and heating for the industrial estate are controlled. In order to cushion power fluctuations in the network a buffer storage of 57 cubic metres was integrated.

Eco-power from biomethane

Beyond this bwe planned and laid the pipeline system for the district heat network installing three biomethane CHPs with 1.2 MW capacity each.

It is now possible for our customer to generate 100% eco-power and profit from it directly. The heat is used for their own manufacturing locations as well as for external companies.

In the main customer’s buildings bwe Energiesysteme subsequently installed eleven transfer stations to utilise the thermal energy.

Everything came from bwe

For the globally operating manufacturing company bwe Energiesyteme did the complete installation and extension of the local and district heat network - from the project planning, through realisation to the acceptance.