Combined heat and power – CHP plants

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What is combined heat and power (CHP) generation?

CHP is the simultaneous generation of electric power and heat in a single plant. A special case is trigeneration, i.e. the combined generation of heat, power, and cooling energy.

The advantage of combined heat and power generation is the particularly efficient use of fuel. Compared with separate heat and power generation, the efficiency factor is significantly higher.

Would combined heat and power generation be of interest for me?

CHP plants are most efficient, if the generated heat as well as the electric power is used directly on-site.  The revenue of a CHP plant can be determined from the amount of heat used, the reduction of purchased electricity, and possible subsidies according to the Renewable Energy Law as well as possible funding, e.g. for heat storage, heating & cooling networks, etc.

Apart from fossil fuels, CHP plants can also be fired with alternative fuels such as bioethanol, wood chips or pellets.

Typical industrial CHP applications are:

  • Combustion systems with steam turbines (back pressure systems, extraction and bleed condensing systems)
  • Combustion systems with steam engines
  • (Micro) gas turbine plants (with waste heat boiler or with waste heat boiler and steam turbine system)
  • Combustion engine plants (CHP)
  • Stirling engines
  • Organic Rankine cycle (ORC) plants as well as
  • fuel cell plants

What can we do for you?

Within the scope of an initial feasibility study, the following steps should be planned and worked out conceptually:

  • Load profile analysis of heat and power demand
  • Determination of basics and general technical conditions
  • Assessment of technical feasibility
  • Procurement of target price offers for the main plant components
  • Drafts of different plant concepts, taking local conditions into account (rough dimensioning of equipment)
  • Estimated efficiency of the plant concept, taking the individual energy costs and duties into account, e.g. energy tax as well as revenue from funding programs
  • Sensitivity analysis regarding the influence of changing energy prices
  • fuel cell plants

Selected projects

For these industrial companies we have created concepts for energy supply with CHP plants and thus ensured a long-term economical energy production.

Alno Energieberatung Pfullendorf - Energieberatung Industrie

Alno AG

An economic comparison of different heat generation technologies has shown that the conversion to decentralised hot water generation with natural gas low-temperature boilers was more economical than refurbishment or replacement investment in the waste wood heating plant. In addition, a natural gas CHP plant was installed to cover the company’s own electricity requirements.

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Biomassekessel EEG 2021

Approval procedure sewage sludge drying

The basic concept, which will be implemented by the client with renowned companies from the biomass, CHP and drying technology sectors, includes heat generation from wood pellets and forest chips as well as low-temperature sewage sludge drying.

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Biomasse-HKW Albstadt - Energieberatung Albstadt

Biomass CHP Albstadt

The core of the pilot project is the drying of sewage sludge directly on a sewage treatment plant using low-temperature waste heat from a wood-fired biomass cogeneration plant. The dried sewage sludge is easy to transport and is a welcome and CO2-neutral fuel substitute with high calorific value for the recyclers.

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Biomasse-HKW Löbau - Energieberatung Oranienbaum Heidegrund Löbau

Biomass CHP Löbau

The conception, planning, project management and control of the 3 ORC combined heat and power plants in Heidegrund, Oranienbaum and Löbau, with pelleting including machining, was carried out by eta Energieberatung in Pfaffenhofen.

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Biomasse-HKW Mudau - Energieberatung Mudau

Biomass CHP Mudau

Conception, planning, project management and control for the biomass ORC cogeneration plant and a wood pelleting plant were carried out entirely by eta Energieberatung, Pfaffenhofen.

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