English

This paper presents the energy modeling and simulation of a railway station building through thermal and electrical loads calculations. To address this problem, we have developed architectures of thermal and electrical models using Dymola/Modelica environment. Thermal model is based on the elementary components of Modelica Buildings Library associated with other internal (GDF SUEZ) and external libraries. As for the electrical model, we implemented a new library to predict and calibrate on real data provided by measurements the power consumption of several equipment into a railway station.

New French construction programs must deal from 2013 with strongest regulation requirements intended to reduce building energy consumption : Thermal Regulation 2012. The envelope is one of the building major elements that is concerned by these regulatory demands and where insulation enhancement can give a suitable response. Therefore, increasing the insulation level and air-tightness will positively influence the heating needs during cold season, but the main difficulty resides instead during the warm season.  

Green roofs and green walls have several benefits on buildings and cities. They are most often used for water management and for the aesthetical value they provide to the urban environment. These green coatings have a positive impact on the sustainability of building materials. They can improve building energy performance and reduce the amplitude of diurnal variations of the surfaces temperature in summer. The energy saving or comfort improvement is more obvious for hot climates. This paper presents a green envelope model integrated in a transient building simulation program (TRNSYS).

The analysis of the hygrothermal behaviour of green building materials is investigated in this work. For this, a 1D heat, air and moisture transfer model was developed using Comsol Multiphysics® and applied to a hemp concrete wall. Particular attention is paid in the experimental determination of hygrothermal properties and their dependency with the temperature and the moisture content. To validate the model, a hemp concrete wall was monitored for 12 month under various boundary conditions.

Commonly provided HVAC system simulation tools are not necessarily satisfactory for the investigation of operational improvement and renovation planning because the effectiveness of using a large amount of measurement data accumulated in a Building Energy Management System (BEMS) is limited.