Concept Development and Technology Choices for the More-connect Pilot Energy Renovation of Three Apartment Blocks in Denmark.

In the context of the European Horizon2020 project MORE-CONNECT on prefab deep energy renovation of dwellings pilot demonstration projects are carried out in 6 of the participating countries. In Denmark the pilot project comprises a comprehensive energy renovation of three building blocks situated in Roskilde - southwest of Copenhagen. An energy renovation concept for these buildings has been developed according to a methodology developed for the MORE-CONNECT project aiming towards a Zero Energy Building (ZEB) level. The energy requirement for heating purposes is therefore to be brought down from around 100 kWh/m 2 to below 20 kWh/m 2 and a part of the electricity consumption to be produced by PV. The methodology calls for a calculation of total costs versus reduced Global Warming Potential (GWP) and primary energy consumption. The developed concept includes additional insulation in the external walls and roof, new 3-layer low-energy windows, a heat recovery ventilation system and renewable energy supply. Within the MORE-CONNECT two technologies are under development in Denmark: A new PV-roof solution in which the PV-cells are fully integrated in the roofing elements. This PV-roof can be fitted into any roof surface shape and if justified by the cost-optimisation it can be constructed as a PVT-roof connected to a heat-pump for heating purposes. The second technology under development is 3-D printing of a layer of façade insulation by an industry robot. The concept development follows first a path using conventionally available technologies and at the end the two new technologies are integrated in the concept and the corresponding traditionally technologies removed. The end result is an energy renovation reaching plus-energy level at competitive costs. [ABSTRACT FROM AUTHOR]