The application of system identification techniques to the energy performance assessment of buildings and building components requires a high level of knowledgeof physical and mathematical processes. This factor,combined with the quality of the data, the descriptionof the monitoring procedure and test environment, together with the experience of the user of the analysis software itself, can produce varying results from differentusers when applying different models and software packages.
Parameter identification techniques are a powerful tool for the determination of thermophysical properties of building components. However, their correct application often demands a certain degree of experience.Especially in short or/and heavily disturbed data sets a formal use of a parameter identification software can lead to completely wrong results.This paper illustrates these problems by means of some simulation calculations and encourages to a discussion about possible solutions.
The purpose of this work was to determine U and g coefficients of the external wall with transparent insulation under real external climatic conditions. As the mainly methodology used for obtainment of the intended results was adoption of the methodology based on Paslink test cells system. To obtain from the collected data the searched coefficients various method of analysis was used.