Combined heat and power (CHP) - more efficient power generation

Combined heat and power (CHP) production is the most efficient fuel-based energy production. By producing electricity and heat you maximize the use of fuels, which is energy efficient. At the same time you lower the amount of CO2 released into the atmosphere.


Increased efficiency

Using CHP increases the efficiency of fuel use – up to 90 % of the fuels can be utilised.


Lower emissions

The efficient CHP plants significantly reduce emissions, compared to separate production of electricity and heat.


Fuel source flexibility

The CHP plants use various energy sources, e.g. biomass and waste.

Close up of bio mass

Key numbers for 2016


megawatts (MW) of production capacity


terrawatt hours (TWh) of electricity produced

26 %

share of Fortum’s total power generation

New challenges

The continuous improvement of resource and energy efficiency is important in terms of the sufficiency of natural resources and climate change mitigation. CHP production addresses both of those issues because over 90% of the fuel's primary energy is used to produce district heating and electricity.


Using biomass and waste

Generating heat and power by adding carbon-neutral fuels to the mix dramatically reduces emissions. Unlike single source power and heat production with natural gas or coal, CHP with biomass and waste in the fuel mix reduces CO2 emissions by up to 40%.


Making adjustments

CHP balances the seasonality of electricity demand with intermittent production from renewables.

FAQ - Combined Heat and Power

What is CHP?

Combined heat and power (CHP) maximises the energy efficiency by producing electricity and heat from a versatile mix of fuels in one production facility.

How does CHP work?

CHP plants capture and utilise the heat that comes from the engine during electricity generation and provides both heat and electricity in one process. Additionally during the summer months the heat generated may be used to provide cooling for air conditioning.

Where does Fortum use CHP?

We have CHP plants in Finland, Poland, Russia and the Baltic countries. Our production of district heating in Stockholm is equally owned by Fortum and the city of Stockholm under the brand Stockholm Exergi. In Norway the production of district heating is owned together with the city of Oslo under the brand Fortum Oslo Värme.
Most of our CHP plants are located in urban areas where there is a significant demand for district heating and most of the plants have an additional condenser that allows for increased electricity production in the summer when demand for heat is low.


CHP and the environment

CHP production is based on fuel combustion, so the main environmental impact is related to flue-gas emissions. To help mitigate this, flue gas cleaning technologies are used. Carbon-neutral fuels are added to the mix and advanced combustion techniques are used to reduce sulphur emissions and nitrogen oxides. CHP leaves behind ash, but up to 50% of the CHP ash in Europe is used by the construction materials industry for earthworks and to fill up mines. 

Get to know our power plants