Developing methodologies for the integration of low-grade energy sources into high-temperature district heating networks

Solutions developed

Low2HighDH is a 3-year project supporting 30 high temperature district heating sites (HT DHC) in Lithuania, Poland, and Slovakia in the implementation process of low-grade or waste heat technologies, by promoting the advantages of these energy sources and providing them with an investment plan to fulfil the proposed criteria for ‘efficient district heating and cooling’ from the Energy Efficiency Directive within a 10-year timeframe.

Main results

The project supports HT DHC owners/managers by managing RFQs to select key suppliers for implementing low-grade RES technologies like solar thermal, geothermal, and heat pumps. Heat pumps are pivotal, utilizing renewable electricity to harness low-grade heat and waste heat. Capacity-building materials and solutions will be disseminated for wider adoption. A network of stakeholders spanning 3 countries will facilitate engagement, dissemination, and replication. Expected impacts include triggering EUR 454 million in sustainable energy investments, replacing 1 TWh/year of fossil fuels, and abating 291 thousand tons of CO2 emissions.