Combined Heat and Power (CHP) is a system that converts a single fuel source into both electricity and heat. It’s highly energy efficient and, as well as supplying heat and power, can deliver financial, operational and environmental benefits.

Businesses that use large amounts of electricity and heat (e.g. hotels, hospitals, process manufacturing), can particularly benefit from installing a CHP.

How does it work?

With CHP, an engine (powered by natural gas, biogas, bioliquid or biofuels), is linked to a generator. CHP maximises the fuel and converts it into electricity, for a reliable supply on site. The heat generated is recovered from the engine and can be used elsewhere in the building.

How can CHP be used?

CHPs can be integrated with systems such as:

Low Temperature Hot Water (LTHW) Systems – Heat is recovered and used to heat water in a water circuit. The heat can also be used for domestic hot water use, when LTHW load is reduced, for example during the summer months.

Steam Systems – The exhaust gases from the CHP can be diverted directly into a waste heat recovery boiler and turned into steam. This is best for units with a load over 500kWe.

Absorption Cooling Systems (Trigeneration Systems) – Waste heat is used to meet cooling demand, rather than using traditional methods like a vapour condensing chiller that uses electricity. This technology removes the element of seasonal variation and it improves the operational hours of the scheme. Absorption chillers do require some form of heat rejection.

Below is a diagram of how a CHP Unit works, please use our contact form for a bespoke quotation on a CHP Unit.

How does cogeneration work? | Veolia CHP