This thesis work is aiming to define and validate a simplified building
model, which can be used to improve building energy efficiency.
The building model is defined with two majors concerns :
• The building model is dynamic, called lumped model, i.e. built on a set of
resistances and capacities, and solved by differential equations.
• The dynamic lumped model is associated to a building ventilation model,built on a set of resistances and generators.
The building simplified dynamic model is validated by comparing its results
to those provided by a detailed dynamic model, built on wall response factors.
The building ventilation model is defined in order to deal with natural air movement as well as mechanical devices (fans and ducts). The model can yield infiltration and exfiltration. It is able to estimate the indoor air quality level, the thermal comfort when free-cooling is performed, and the building energy balance.
The building lumped model is connected to equipments including heating and
cooling terminal units as well as water pipes, air ducts, heating and cooling plants. The equipments models are simplified and built on parameters deduced from correlations drawn on more detailed equipment models. The connection between the building model and its system, through control laws, can provide an estimation of the system ability to maintain indoor comfort. Primary energy consumptions, carbon dioxide emissions and energy costs can also be evaluated.
The complete model can be used to provide results regarding the influence of control strategies on comfort and energy consumption, and to estimate different equipments performances.
All the models are developed through EES solver (Klein).