Application of System Identification for Thermal Characterisation of Building Components

Abstract The CEC is searching for standardised methodologies for the assessment of thermal parameters for different types of building components. The dynamic system identification techniques are the most promising methods to achieve this goal. Within the frame of the DGXII PASSYS project the work at the JRC solar test site has been concentrated on the development of reliable parameter identification methods. Methods used in the PASSYS project are based on a lumped parameter model and a continuous time model, modal models and armax models. The application of identification methods on in-situ measurements will be discussed. A performance check for these methods will be presented, which includes tests on noise, change of input signal by uncontrolled phenomena and non linear parameter behaviour. The application of several methods will be discussed in this paper. Problem areas, like physical meaning of parameters and cross validation for different data series will be among the topics.