At the Department for Energy and Building Design (EBD, Lund, Sweden), a measurement system has been developed for outdoor sunshields (e.g.: Italian and Venetian blinds); however this system is incapable of measuring indoor sunshields. Therefore the measurement system has to have real room conditions, if a curtain is installed in a room, the measurement system should not disturb the natural air circulation. In the 1990's the PASYS system was developed to measure indoor shields in a comparable way. The system described in this thesis is a further development to the PASYS system, in which only one wall facing the outside instead of five. Measurements were made and a model for the behavior of the room was developed. There are two identical rooms; one is used as a reference room without any installed sunshades, and the other is used for measurements. Characteristics and parameter identification mechanisms are shown for the PASSYS and EBD lab rooms.
Various sophisticated methods were used for the PASSYS room and a large amount of effort was spend on error correction.
A modeling process was required for parameter identification, starting with the most basic model. Two methods were evaluated - the capacity model and the time-shift model. Physical aspects that influence energy balance were added to each model step-by-step. It will be illustrated that the capacity model reached its limits and there is no longer any way of improving it further. The pros and cons of each model are discussed, with the time-shift model left at the end to be developed further.