The heat generated by a CHP unit in a standard 90/70 °C heating water circuit stems roughly half from engine cooling water and half from exhaust heat. At our compact CHP unit, the exhaust heat can be extracted seperately and led to an external steam generator.
For example, the CHP unit GG 402 D in a meat processing plant produces ca. 280 kg steam per hour. A critical condition for the steam generation via CHP unit is that there also is a demand for the engine cooling water heat. In the mentioned CHP project, the 80/70 °C (flow/return) cooling water heat is used to heat up washing and process water. Another example is the Früh Kölsch brewery where the generated steam (ca. 180 kg/h) is fed into the brewery’s steam network and all other heat (including condensing heat and mixture cooling heat) is used to heat up the brewing water. The electricity is used in both examples for the production.
Due to their higher share of exhaust heat and the higher total heat output, larger CHP units with turbo engines are generally more suitable for steam generation than smaller CHP units with suction engines.