External Insulating Shutters in Energy Conservation Houses. Descriptions and Experiences from Three Low-Energy Houses at Hjortekaer, Denmark

摘要

One way of minimizing the heat loss through windows is to apply movable insulation. This report gives a detailed description of three types of external shutters that were designed for three of six prototype low-energy houses at Hjortekaer, Denmark. Some effort has been made to achieve efficient seals, and measurements of infiltration air change rates and results from pressurization and depressurization tests show that the attempts have been successful. The thermal performance of the shutters has been verified by thermal calibration of the houses, and a very good agreement is found between the measured and the calculated heat losses. This forms a basis for an estimate of the annual energy savings obtained by the use of shutters. In the three houses a conservative estimate shows energy savings of approx 800-2000 kWh/year. When the houses were occupied the operation of the shutters was monitored, and a description is given of the mechanical performance of the shutters as well as of some users' experiences, mainly concerning the problems caused by drifting snow. (ERA citation 09:016738)