English

Outdoor testing of building and building components under real weather conditions provide useful information about the dynamical performance. Such knowledge is needed for properly characterizing the heat dynamics and provides useful information that can be used eg. to implement energy saving strategies. In order to analyse such tests models and methods for dynamic analysis are required. However a wide variety of models and methods exists, and the problem of choosing the most appropriate approach for every particular case is a non-trivial and interdisciplinary problem.

This paper presents the application of IDENT Graphical User Interface of MATLAB to estimate the thermal properties of building components from outdoors dynamic testing, imposing appropriate physical constraints and assuming linear and time invariant parametric models. Theory is briefly described to provide the background for a first understanding of the used models. The relationship between commonly used RC-network models and the parametric models proposed is deduced. The analysis is generalised for different possibilities in the assignment of inputs and outputs and even multioutput.

The PASLINK test facilities and analysis procedures aim to obtain the thermal and solar characteristics of building components under real dynamic outdoor conditions. Both the analysis and the test methodology have evolved since the start of the PASSYS Project in 1985. A programme of upgrading the original PASSYS test cells has improved measurement accuracy. The emphasis has moved from steady state to dynamic methods with shorter test durations yielding improved information and more accurate results.

From the experience gained in several EU research projects, an improved design for a common Test Reference Environment was made allowing the assessment of experimental data for electrical and thermal performance evaluation of photovoltaic systems integrated as cladding components into the building envelope, giving input to modelling work. The specific design of the PV module and test reference environment makes it possible to study through electrical and thermal energy flow analysis, the effect of using different materials for PV modules and construction design of claddings.

System identification allows the development of a dynamic model of a process. Such techniques have been applied also to the processes describing the thermal performance of buildings. Such a technique is the estimation of stochastic state space models. The aim of this paper is to investigate whether this technique could model the thermal performance solar pond scale models. The identification results allowed the modeling of the ponds thermal performance both with a physical model, based on the state space equations and with an ARMAX model.

A number of differences between the experimental results and the calculated thermal behaviour results of the timber frame walls have been obtained during the investigation carried out at summer operation conditions. The aim of the recent investigation is to determine at what stage in the calculation procedure the most significant errors in the estimation of the values of physical parameters might be made. The impact of errors on the further calculation reliability will be discussed as well.

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.

The paper presents the results of the measurements and integrated simulation of the energy demand and air exchange in one of the flats located in a 5-storey building located in urban area. The experiment was carried out during 3 weeks of March. The total energy consumption necessary for flat heating was measured continuously (at a 2 sec time step). After measurements were finished the energy demand and ventilating air flows were calculated assuming the same weather data variation as measured during the experiment, using the ESP-r software.

The application of system identification techniques to the energy performance of buildings and building components requires a very high level of knowledge of physical and mathematical processes. This factor, combined with the quality of the data, the description of the monitoring environment and procedure, together with the experience of the user of the analysis software itself, can end up in varying results from different users when applying different models and software packages.

Airflow characteristics in ventilated and air-conditioned spaces play an important role to attain comfort and hygiene conditions. This paper utilizes a 3D Computational Fluid Dynamics (CFD) model to assess the airflow characteristics in ventilated and air-conditioned archeological tombs of Egyptian Kings in the Valley of the Kings in Luxor, Egypt.