Latvenergo AS builds the largest heat storage unit in the Baltics


A heat storage unit is built in the territory of CHPP-2 of Latvenergo AS to become the largest and the only heat storage unit in the Baltic countries with the volume of heat carrier of 18 thousand m³. An extensive and modern solution will ensure more efficient use of heating fuel in the country, reduce consumption of energy sources and increase competitiveness of CHPPs.

Project 4.3.1.0/18/A/021 named “Creation of a heat storage system at CHPP-2, generating facility of Latvenergo AS” is implemented with co-funding of the European Union Cohesion Fund. The total project expenses amounted to EUR 9,045,041.85 million, with EUR 8,544,841.85 being eligible costs. The intended EU co-funding is 30% of eligible costs without exceeding EUR 2,563,452.55.

The heat storage system will ensure savings of primary energy sources (no less than 2,421 MWh/year), the reduction in CO2 (no less than 9,041 t/year), as well as will store at least 65,013 MWh of heat energy per year. The creation of this heat storage system will increase the security of heat supply of the Riga district heating system (DH) on the right bank. It will not only foster saving of energy sources and improvement of efficiency indicators, but also increase the use of CHPP-2 power units in the cogeneration mode, creating additional conditions for a lower market price of electricity and heat in Riga and all over the country.

Construction works are being performed in the project “Creation of a heat storage system at CHPP-2, generating facility of Latvenergo AS”. The foundations were laid in autumn, and in January 2020 the construction of the roof of the heat storage tank started. In February, walls of the heat storage tank are built in the territory of CHPP-2 of Latvenergo AS gradually reaching the height of 48 metres.

The storage tank construction technology provides for lifting of the tank roof built on the construction site using jacks to build the tank wall belt under it. After the creation of each tank wall belt the structure will be lifted using jacks and built into the next tank wall belt until the designed storage tank height (47.8 m) is reached. In parallel, the construction of foundations of the flyover for engineering utilities (pipelines, electric cables, communication cables) is ongoing.

New large-capacity heat storage projects with storage units with capacity up to 50,000 m³ have been installed and are planned to be installed in Europe in recent years. For example, about 12 heat accumulation tanks with capacity over 20,000 m³ were installed in Germany in 2017. 

The foundations were laid in autumn 2019, and in January 2020 the construction of the roof of the heat storage tank started.

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