eta Energieberatung - Mikrogasturbine Interquell

​​Combined heat and power

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.

combined heat and power plant - Energy consulting Sulzbach-Rosenberg

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

eta projects with CHP plants

Hospital Garmisch-Partenkirchen

Klinikum Garmisch-Partenkirchen - Eta

Various energy saving options have been studied in detail. The cost-effectiveness of an existing CHP was also analyzed under the changed conditions (new legal requirements). In addition, a call for tenders for electricity and natural gas including contract documentation was carried out.

Interquell GmbH

Interquell - Energieberatung Großaitingen Wehringen

The realization of innovative steam generation with combined heat and power production consisting of a conventional steam boiler with micro gas turbine and GTA burner (gas turbine exhaust gas burner), renewal of the steam distribution with clean steam generators and a new ventilation system for the supply of high-hygiene areas were able to reduce the CO2 emissions by almost 20 %.

Pre-feasibility study Renolit

Renolit - Energieberatung München

The technical feasibility and economic viability of different variants for CHP (combined heat and power) and CHP (combined heat and power) have been analysed. The following technical variants were analyzed more detailed: CHP with use of the heat for absorption refrigeration, micro gas turbine.

Stahlgruber GmbH - Sulzbach-Rosenberg

BHKW - Blockheizkraftwerke -Stahlgruber - Energieberatung Sulzbach-Rosenberg

A concept has been developed that provides a reduction in the heat input through the roof windows, improvements to the air curtains and a higher cooling capacity. The heat supply is most economically by a central generation with combined heat and power. The additional costs paid off against the separate supply in 4.3 years.