Valmet to supply heat recovery tech to Gren Tartu

Gren Group is a leading Northern European energy solutions infrastructure company providing district heating and cooling, renewable energy solutions, and industrial energy services.

Gren operates in the Baltics and the UK with 1.5 GW of production capacity and 3.0 TWh of annual energy sales. More than 95 percent of the energy is produced from renewable and recovered fuels.

In Estonia, the company focuses on developing sustainable energy solutions that meet local community needs. Gren Tartu (previously Fortum Tartu) supplies district heating to offices, public buildings, industrial businesses, hospitals, housing associations, and individual homes.

Additionally, the company offers district cooling mainly to business customers.

To satisfy the needs of our customers, increasing our heat production capacity is a key priority for us, and environmentally sustainable solutions that utilize waste heat are the most effective way to achieve the increase. We have had a long and successful cooperation with Valmet, and their experience and expertise make them a reliable partner to support us on this journey, said Margus Raud, Head of Technical Development, Gren Tartu.

Enable additional heat supply

The delivery, the value of which has not been disclosed, consists of a flue gas condenser and heat pumps for improved heat recovery.

The solution enables efficient recovery of low‑temperature heat from flue gases and upgrades it to a temperature level suitable for district heating.

The solution will add more than 10 MW of additional heat supply to the district heating network. This enables the production of more district heat, using less fuel, reducing emissions, and improving overall plant efficiency.

This project is a good example of how flue gas heat recovery and heat pumps can significantly improve the energy efficiency of a plant and strengthen the security of heat supply. We are pleased to support Gren Tartu with an engineered solution that captures low‑temperature heat and upgrades it for district heating use, said Lari‑Matti Kuvaja, Director, Environmental Solutions, Valmet.