WEDISTRICT Technologies for DHCs

Responding to the EU’s Heating and Cooling Strategy, WEDISTRICT project proposes the
development/installation of clean, smart, and flexible DHC systems to demonstrate 100%
fossil-free heating and cooling solution in district networks by integrating multiple renewable
energy sources and existing excess heating, as a tool for reaching the EU climate goals.
Four demonstrators will be developed in Spain, Poland, Romania, and Sweden, integrating
different technologies (solar, solar cooling, thermal storage, biomass boiler, geothermal-PV
hybridization, waste heat recovery with fuel cells), according to principles of energy
efficiency operation, costs limitation, sustainable premises, and reduced
maintenance. The project will also integrate sustainable business models and will aim at
engaging the citizens.
In order to achieve WEDISTRICT’s ambitious goals, 9 upgraded renewable technologies
has been developed to be integrated into 4 real DHC sites in Spain, Romania, Poland, and
Sweden for DHC generation.
D3.1 Technologies Design:
This document reports information about the Technologies Design and concerns the
following groups of technologies: Concentration Solar Technologies; Geothermal - PV
Hybridization; Solar Cooling Technologies; Optimized Heat Storage; Low-Emission Biomass
Boiler; Waste Heat Recovery.

D3.12 WEDISTRICT Technologies for DHCs 5
This project has received funding from the European Union’s Horizon 2020 research
and innovation programme under grant agreement N°857801
The WEDISTRICT solutions will be applied across the real DHC sites as follows:
Figure 2. Implementation of the upgraded renewable technologies in the real DHC sites.
Overall, the report sections are divided into four sub-sections per each technology group.
Firstly, general state-of-the-art descriptions are introduced, followed by the performed
technology developments within the first 12 months of the WEDISTRICT project.
Followingly, the report contains each current technology group status (M12) and lists the
latest engineering documents (appendices) along with the respective project partner’s plans
for the following work to be performed within each technology during the next 6 months of the
project.