Extension of IEA Solar Heating and Cooling Task 20. Participation in Subtask F - phase 2

The project was based on the results from previous Task 20 activities. In the project, focus was put on implementation of solar solutions for space and domestic hot water heating in existing buildings. The purpose of the Danish participation was to participate in the development of the latest energy saving building renovation technologies and to make the results match Danish conditions. The extension of Task 20 consisted of Subtasks: 'E - Evaluation of Demonstration Projects. 'F - Improvement of Solar Renovation Concepts and Systems', 'G - Dissemination of Results. Phase 2 of Subtask F (which is an continuation of phase 1) included: Improvement of existing systems for renovation based on the calculations from Subtask B and the experience's from implementation in Subtask C; Combination of solar and non solar based technologies to increase the use of solar energy; Evaluation and modification of advanced concepts from Subtask B. The research activities has covered energy related aspects as well as construction related aspects. The Danish activities has focussed on R and D within 3 areas: 'Innovative renovation of multi storey buildings - Advanced glazed balconies with ventilated solar walls for preheating ventilation air', 'Flexible Facades - Development of a flexible system for solar based renovation of facades'. 'Prism - Improved daylight conditions in old multi storey buildings'. The results from the research activities have been a valuable base for the detailed planning activities in three different building renovation projects focussing on solar energy in building renovation. Furthermore, the Danish activities has included participation in discussions, evaluations and improvements of concepts developed by the other Task 20 participants: Glazed balconies, Solar wall heating with transparent insulation (TI), Solar thermal collectors, Air collector systems, Improved use of daylight