BSA 2015 - Feb. 2015

Title of the Conference/Workshop: 2nd Building Simulation Applications

Location: Bolzano, Italy

Dates: 4th-6th February, 2015



Brief description of the conference:

IBPSA-Italy and the Free University of Bozen-Bolzano, Faculty of Science and Technology, organized the second Building Simulation Applications conference which was held in Bolzano, Italy, during 4th-6th of February. The conference took wide audience from several sectors, from public and private researchers in the general sector of building simulation to energy modelling technicias, building designers or engineers, among others.

With regard to the topics, the offer was spread and the complete list is:

  • Building physics: envelope and system components 
    • Heat and mass transfer modeling in buildings 
    • Building envelope systems and facades, and innovative building materials 
    • Air flow, natural ventilation and  mixed mode cooling 
    • HVAC components and systems 
    • Building control systems 
  • Integrated performance 
    • Building acoustics 
    • Lighting and daylighting 
    • Indoor environmental modeling: visual and thermal comfort, indoor air quality 
    • Net-zero energy building 
    • Retrofit/refurbishment of existing buildings
    • Renewable energy technologies for buildings, district heating  and CHP generation
  • Methodologies, regulation, calculation and simulation tools 
    • Model validation, sensitivity analysis and optimization techniques 
    • Building codes and regulations, simplified methods versus detailed simulation 
    • New simulation tools and improvements in existing simulation tools 
    • Integration, interoperability web-based techniques, software development, open source initiatives 
    • Advances in teaching and education, eLearning 


Campus21 publications

Prediction of vertical irradiance on building surfaces: an empirical comparison of two models



Computational assessment of buildings' thermal and visual performance as well as the estimation of building-integrated solar-thermal and photovoltaic collectors require detailed boundary condition information regarding sky conditions. Advanced building performance simulation tools for energy and daylight modelling typically rely on high-resolution sky models that provide radiance and luminance values of discrete sky patches. Perez et al. (1993) and CIE (1996) represent instances of such models, incorporated, for instance, in the RADIANCE lighting simulation application. The performance of such models needs to be examined against measured data in various locations. In this paper, we used the RADIANCE application to compute irradiance values on vertical surfaces facing four cardinal for a location in Vienna, Austria. Thereby, both Perez et al. and CIE models were deployed. The simulated vertical irradiance values were compared with corresponding measurement results. The statistical appraisal of the comparison points to limits in the predictive accuracy of both models. The results are discussed to address potential contributing factors and future research needs.