Demonstration of the developed innovative solutions will mainly take place in the district of Brunnshög in Lund, Sweden, and in areas in Høje-Taastrup, Denmark. Both cities are frontrunners in climate and smart-city policies. They have plans for development of smart sustainable districts with LTDH and a high share of RES (Renewable Energy Sources). Both cities have Sustainable Energy Action Plans/Strategic Climate Action Plans and are committed to the Covenant of Mayors and/or Compact of Mayors aiming to be CO₂ neutral communities.

The cooperation between the two cities rests on a longstanding technical experience and a political will to develop frontline technologies and solutions for smart, sustainable districts. The size of the population in the cities represents a vast majority of European cities.

By joining forces with leading industrial companies in COOL DH, unique solutions will be further innovated, tested and integrated into business concepts in companies that strive towards strengthened competitiveness and creation of new products in their respective fields.

Relation to the work programme

The COOL DH project addresses use of low-grade heat sources by focusing on huge amounts of low temperature surplus heat from cooling of large datacenters, shopping centres, space cooling plants and industrial processes (described more closely below) that are powered by close to CO₂ neutral electricity. The surplus heat will heat buildings with high energy efficiency. Energy at very low temperatures of <40 oC mean temperature will be used in combination with decentral temperature topping to 45–50 oC for the part used for preparation of DHW, all with the use of renewable energy.

COOL DH will also show how existing buildings after energy refurbishment can adopt to LTDH, enabling district by district to convert to LTDH. Finally we will show how LT supplies can be utilized in existing DH systems in the best way.