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PrevDesign methodology for low cost tubular digesters23 March 2012NextApproaches to evaluate building energy performance from daily consumption data considering dynamic and solar gain effects15 November 2012
  • Scientific publication
01/04/2012
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Modelling the heat dynamics of a monitored Test Reference Environment for Building Integrated Photovoltaic systems using stochastic differential equations

 

ELSEVIER Energy and Buildings Vol. 50 Pag. 273-281 July 2012

Authors: Chiara Lodia ; P. Bacherb ; Jordi Ciprianoc ; H. Madsenb

a Applied Physics Section of the Environment Science Department, University of Lleida, c/Jaume II 69, 25001 Lleida
b IMM, Technical University of Denmark, Richard Pedersen Plads, Building 305, 2800 Lyngby, Denmark
c CIMNE, Building Energy and Environment Group, c/Dr Ulles 2, 08224 Terrassa, Spain

VIEW PUBLICATION
Abstract:

This paper deals with grey-box modelling of the energy transfer of a double skin Building Integrated Photovoltaic (BIPV) system. Grey-box models are based on a combination of prior physical knowledge and statistics, which enable identification of the unknown parameters in the system and accurate prediction of the most influential variables. The experimental data originates from tests carried out with an air-based BIPV system installed in a Test Reference Environment. BIPV systems represent an interesting application for achieving the requirements of the EU EPBD Directive. Indeed, these systems could reduce the ventilation thermal losses of the building by pre-heating the fresh air. Furthermore, by decreasing PV module temperature, the ventilation air heat extraction can simultaneously increase electrical and thermal energy production of the building. A correct prediction of the PV module temperature and heat transfer coefficients is fundamental in order to improve the thermo-electrical production.

The considered grey-box models are composed of a set of continuous time stochastic differential equations, holding the physical description of the system, combined with a set of discrete time measurement equations, which represent the data driven part.

In the present work, both one-state and two-state non-linear grey-box models are considered. In order to validate the results, the residuals are analysed for white-noise properties.

Highlights:
  • The paper presents grey-box models for the heat dynamics of an air-based BIPV system.
  • Several forced regimes and different PV module inclinations are analysed.
  • The convective heat transfer coefficients and the PV module heat capacity are estimated.
  • It is shown that a two-state model is needed for a proper description of the dynamics.
  • Jordi Cipriano
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