The mean absolute error on the air temperature into the classroom is 11.8%. This value is quite high, because our building model is fairly simple, but it’s quite acceptable in the case of a pre­sizing study conducted by a technical research department.

5. Conclusion and prospects

Although using simplified models, this first study provides coherent results and makes possible to evaluate the comfort conditions into the building with an accuracy of 12%, being able to precede a usable tool by technical research departments for feasibility or pre-sizing study. With the sights of the errors on certain components, it appears that we can improve the overall accuracy of modelling by integrating more accurate models for the field of solar collectors, absorption chiller and the building. The absorption chiller and solar collector models are in progress. Moreover stratified tanks models (hot and cold) have been completed and will be integrated into the general model. Regarding the building, we chose, at first time, a very simplified model because the coupling between the software Energyplus (modelling of the building) and the simulation tool Spark is under development. If this coupling could not be done, a model closer to reality must be considered under Spark, particularly to take into account the inertia and the exposure of the building but also the ventilation.

References

[1] Lucas F., (2006). Presentation du projet ORASOL : Optimisation de precedes de rafraichissement solaire.

[2] Castaing-Lasvignottes J. (2001). Aspects thermodynamiques et technico-economiques des systemes a absorption liquide.

[3] Tittelein P., (2008). These : De l’interet d’utiliser un environnement de simulation performant, SimSpark, dans l’etude du comportement des batiments a basse consommation d’energie, Universite de Savoie, Polytech’ Savoie, Le Bourget-du-Lac.

[4] Schuco, (2007). Manufacturer documentation about solar collector SchucoSol U5 DG.

[5] Schuco, (2007). Manufacturer documentation about absorption chiller LB 30.