IBPSA1995

This paper reports on a project carried out at Delft University of Technology, for improvement of daylightíng simulation tools. Earlier work involved the development of SIBE2, a prototype daylight simulation program using new computational concepts for daylighting simulation in order to overcome a number of well known disadvantages of present daylighting simulation tools. This project was concerned with the importance of realistic description of the sky luminance used in the simulation.

A translucent external wall system for solar space heating and daylighting is briefly presented. This system is composed of phase change material encapsulated in glass containers and a layer of transparent insulation material to reduce thermal losses to the environment. The melting process is induced by absorption of solar radiation in the bulk of the phase change material. In this article we focus on the one-dimensional mathematical-thermodynamic model of the store.

Simulation of dynamic moisture transport processes in building structures under varying conditions re- the solution of the partial differential equations of coupled moisture and heat transport. Our research focuses on the moisture transport equation as this is generally the harder one to solve. We will report on, two related research projects that are motivated by durability-aspects of construction walls, being dependent on specific transport phenomena occurring during operation (first case) and construction (second case). The first case deals with moisture migration as a result of both moi

This paper discusses a model for integrating a rigorous thermal simulation with computational reasoning. This model is used to build an intelligent computer-aided system that assists designers throughout the design process. The model uses rigorous hierarchical thermal simulation modules linked to several databases. In addition, Artificial Intelligence Techniques are used to build a multilevel reasoníng structure for both the initial and the final design. Neural networks are utilized for the initial design stage problem detection where problems are incomplete.

As introduced in a paper in Building Simulation '93, the training of users; of simulation based thermal performance assessment tools is central to the efficacy of such tools within professional practice. A will-structured training facility can act as a 'virtual laboratory' for researchers and students. It is now possible to report on, the results; of the evolution of a simulation environment (ESP-r), training support software and literature as well as a new set of observations of alternative approaches to training in academic settings, workshops and remote learning. 

PowerDOE, a new, PC-based building energy performance simulation tool, combines the full capabilities of DOE-2.IE with an easy-to-use, flexible WindowsTM graphical user interfáce (GUI). This interface implements a number of unique approaches to fácilitate. developing an accurate building description. PowerDOE organizes architectural and HVAC elements in a hierarchy that is intuitive and familiar to designers and analysts.

In this paper a new procedure of determining the thermal resistance and the thermal capacity of multilayer walls is described. Its feature is the simulation of the thermal behaviour of the wall with subsequent parameter identification. The possibilities and limits of the procedure are shown and filustrated with results from an one- and a two-layer wall. A comparison of the described method with the wellImown averaging method shows the advantages in using dynamic analysis. 

Modern, Message-Based operating systems with Graphic User Interfáces have spurred tremendous advances in software development. Usability, connectivity, and transparency of software has increased, as has the transfarability of the skills learned in one application to another. 
Building Simulation software developers have ample opportunity to profit from the advanced technology that is now available, such as sophisticated edit controls, helpful concepts such as Cue Help and Wizards, and the powerful modularizations made possible by Dynamic Link Libraries. 

This paper gives an overview and examples of varíous approaches to system simulation in buildings. Advantages and disadvantages of the different methods with respect to problems commonly encountered in building performance evaluation are described. Merits and drawbacks of the various methods and approaches are ülustrated by case study material. Finally some conclusions and directions for future work are indicated.

During the recent years a lot of models describing air flows in buildings have been designed by Researchers. These models, which are based more or less on simplified approaches coming from fluid dynamics, share a high complexity level because of complex geornetrical structure and. complex components of buildíngs. This complexity is the source of bad, experimental fitting, most of all because scale models don't correspond to the needs for fitting.