IBPSA2003

The  design  for  the  new Federal  Building  for  San Francisco includes an office tower that is to be naturally ventilated. Each floor is designed to be cross-ventilated, through upper windows that are controlled by the building management system (BMS). Users have control over lower windows, which can be as much as 50% of the total openable area. There are significant differences in the performance and the control of the windward and leeward sides of the building, and separate monitoring and control strategies are determined for each side.

DElight  is  a  simulation  engine  for  daylight  and electric lighting system analysis in buildings. DElight calculates interior illuminance levels from daylight, and the subsequent contribution required from electric lighting to meet a desired interior illuminance. DElight has been specifically designed to integrate with a building thermal simulation on a timestep basis, for whole-building analysis. This paper describes the simulation methods used in DElight  and  some of the key details of software implementation.

The objective of this paper is to model the double skin façade in order to determine the thermal and flow performance and to find out how the façade should be combined with the HVAC system inside of the building. In order to analyze these aspects a simulation model of the double skin façade was built and validated with the use of the test facilities and a real office building. Models of different configurations were tested and validated.

As part of the application of optimal control to smart façade systems (SFS) with motorized Venetian blinds inside the glass enclosed cavity, we investigate the rapid determination of daylighting quantity  and quality obtainable from these systems. This paper proposes a set of daylight performance indicators to assess smart façades or similar systems and discusses real-time daylighting optmization.

A method of simulating the interaction between an architectural environment and human action in the environment is described. The computational  model is composed of a model for building simulation, a model for action simulation, and a model to mediate the simulation models. This model is being developed to find the environmentally symbiotic actions and the knowledge and beliefs that people are encouraged to acquire to perform such actions. There might be no room in the majority of traditional simulation to model an occupant as the individual that has  desire, belief, and intention.

There is a growing need for more complex control of ventilation systems to satisfy energy and environmental issues. SIMBAD Toolbox (SIMulator of Buildings And Devices), developed in the SIMULINK graphical environment is a library of HVAC components models that is used in the field of control of HVAC system. Currently, it deals mainly with heating/cooling systems.

The necessity of focus on more large integration of passive concepts for indoor climate conditioning is today a reality. Through this study, a contribution to fill the lack of useful design guidelines for natural ventilation is proposed, in order to develop the passive ventilation systems implementation. Besides a methodological approach, the paper proposes conceptual tools. The implementation of a natural ventilation strategy includes the envelope building design, the indoor spaces layout and the component sizing. This study explores an architectural classification of ventilation systems.

Convective  air  circulation  occurring  through  wall layers is frequently observed in building envelopes. Significant thermal coupling can take place between the incoming cold/warm air and the wall structure, thereby modifying the thermal performances of the envelope. This paper presents an unsteady three- dimensional numerical heat and air transfer model, which was developed to characterize the air leakage effect on the thermal performance of a complete multilayered exterior wall.

This paper is part of continuing research aimed at exploring the relationship between the amount of solar radiation received by a curved roof and its geometrical configurations. It seeks better understanding of the solar performance of traditional curved roofs to be well integrated into buildings in developing countries, mainly in hot regions Fig. (1). A number of investigations has been carried out on curved roofs with varying cross-section ratios and orientations to study their solar radiation performances.

This   paper   summarizes   a   PhD project   that   is currently under completion at Delft University of Technology, Faculty of Architecture, Building Physics Group. The general  problem addressed in this project is the integration of building simulation tools and building design.