Objective
The aim of the project is :
- to utilise high technolgy "solar skins" and windows to capture solar radiation and reduce heat losses;
- to integrate these systems with high efficiency heat recovery and the thermal storage of the fabric;
- to demonstrate the importance of solar friendly design at higher latitudes;
- to involve the student residents in the understanding and operation of energy matters.
The systems is integrated in apartments buildings for a total of 400 students. Each appartment is for 4 to 8 persons with single rooms and shared facilities, including kitchens.
The first heating season required more auxiliary heating than expected due to the drying out of the building structure (plaster and concrete) and difficulties with the ventilation system. Other preliminary results concern. Higher than expected dust penetration into the LEGIS wall which may be due to dust during construction or to atmospheric pollution since completion. The effect is being monitored and possible solutions are being investigated. The triple-glazed windows have insufficient ventilation in the cavity and this is causing condensation on the inside of the outer pane. It is anticipated that adjustments to the draught sealing will remove this affect. There have been problems with condensation in shower rooms and it is anticipated that modifications to the ventilation system will be required to increase air change rates in these rooms. It is recognised that occupants should have been better informed about the unusual features of the building and this may have led to unsympathetic use of heating, blinds and windows.
Finally there were delays in delivery of the blinds for the LEGIS wall and this will have resulted in lower U values during the night and hence lower room temperatures while resulting in overheating during long periods of sunshine. It is anticipated that blinds will have been installed by April/May 1991 and the improvements will be monitored during one full heating season.
The Design and Built Contractor was Kaiser Bautechnik Ltd and work started on site in June 1988. The buildings were occupied from March 1990. The buildings are aligned east-west across the south facing slope, unobstructed to the sun throughout the year. The main solar components are on the south facades where approximately 33% of the glazed are has double or triple-glazed windows with automatic roller blinds in between the glass and 66% of the area has an innovative solar skin developed at the Fraunhofer Institute and named the LEGIS system where solar radiation is transmitted through the outer glazing and across an air space containing roller blinds, through translucent insulation material (TIM) to be absorbed into a dark painted dense concrete wall. The window blinds and the LEGIS wall blinds are automatically controlled although the bedroom blinds have manual override to allow the occupants to control privacy. Normally the blinds will be open during the day to provide solar heating and closed at night to reduce heat loss. When the desired temperatures are reached during the day the blinds will automatically close. The buildings also have mechanical heat recovery ventilation systems and hot water is provided by gas fired boilers in the roof space. Bedrooms have auxiliary electric backup heating with time controlled switches.
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Programme(s)
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Topic(s)
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Funding Scheme
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Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
G1 1XQ GLASGOW
United Kingdom
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.