IBPSA1993

The prediction of the effects of moisture in buildings is now a well established part of the building design process. A significant international effort is taking place to develop combined heat and mass transfer models which will enable the thermal and hygric performance of building envelopes to be more accurately assessed. However, the universal solution of the defining equations requires the separation of the total moisture flow into its liquid and vapour components for any specified set of humidity conditions.

This paper discusses the creation of standard weather data files covering the whole of New Zealand. As part of this process we describe the development of a method for selecting extreme weeks of data. This provides the simulationist with a set of weather patterns which test a building's performance under the one-percentile most demanding conditions to be found at a particular location.

The aim of this paper is to describe the work currently under way at CSTB in the frame of the project 'Intelligent Sitnulation Environments'. The paper presents the underlying concepts of this project and then discusses the main features qf an ISE (data sharing, coupling of simulation tools, reasoning facilities, model documentation and graphical front-end). Special emphasis is put on the model documentation with a proposal of a Standard Model Documentation which would combine the advantages of the existing Proforma and Neutral Model Format.

The RADIANCE lighting simulation system was used to evaluate the daylighting inside four major buildings being constructed and refitted in New Zealand. This paper describes the utility and useability of such a simulation system for large projects of this nature. The ability to create many virtual snapshots of design alternatives and compare them both visually and numerically is explored, as are the problems Architects will find with describing a model to a simulation system of such complexity.

This paper describes a number of issues which building modelling must take into account if it is! to he used as a tool in government policy making and regulatory frameworks. It points to, the importance of empirically verifying data inputs and model output to ensure credible results and demonstrates the importance of considering both envelope and plant characteristics, even for residential buildings. Capital costs and running cost are demonstrated to be equally important in policy making decisions.

There has been widespread concern over the high energy consumption and the often less-than-satisfactory environmental control performance of most air conditioning systems relying on conventional control schemes. In this paper, a new approach to tackle the problem is presented, which aims at achieving a high quality control of the indoor thermal environment with reduced energy consumption.

This paper addresses the development of a prototype system for energy building simulation by coupling commercially available CAD systems for architecture to numerical computational methods. Three fundamental directions of the research work are presented:-enhance and expedite the traditional and manual design activities;-open new design possibilities in building design by exploring graphics, database capabilities and innovate programming;-interfaces to generally available computational software using the same graphical environment.

This paper presents the application of geometric modeling and various performance simulation tools in architectural design, highlighting their respective impact on the design decisions made in the process. Based on the experiences gained in this process, a critical review of the potentials and problems of current simulation tools and simulation-based design decision-making strategies is offered. Particular attention is given to the crucial dialectic of process and tool in supporting knowledge transfer and decision?making in building design.

A new method to simulate the daylight performance of fenestration systems and spaces is presented. This new method, named IDC (Integration of Directional Coefficients), allows the simulation of the daylight performance of fenestration systems and spaces of arbitrary complexity, under any sun, sky and ground conditions. The IDC method is based on the combination of scale model photometry and computer-based simulation.

This study (*) has been developped in real site on gymnasium situated in the center of FRANCE which was experimented during two years. This building is equipped with two interconnected energy saving systems. In this first part of the paper the authors describe rapidly the two remarkable energy saving systems of the building. Then, they present theoretical and validation studies which were necessary to simulate correctly these two components.