In view of the emerging radiant cooling technologies in the European market, a dynamic building thermal analysis program ACCURACY is enhanced to be able to do cooling-load calculations and annual energy analysis for rooms with cooled ceiling climate system. The program was validated against the experimental investigation of the dynamic response of a test room to step heating and step cooling. Specifically, the validated program is used to perform a simulation of the combination of evaporative cooling with cooled ceiling technique for office building cooling purpose.

A new energy efficiency code for nonresidential buildings is being developed in Canada. This code will have three compliance paths for building envelope requirements-simple prescriptive tables, a trade off procedure, and whole-building energy performance modelling. A simple means of estimating the relationship between building envelope characteristics and energy consumption was needed both for economic analyses to select prescriptive envelope values, and as the basic energy model for tradeoff compliance software.

BC Hydro and their consultant have devised a method for aggregating hourly results from DOE2 computer energy models to simulate sector-wide impacts of commercial deman-side management (DSM) programs. This process assists in the analysis of DSM program impacts on projected utility system load profiles. With this process, BC Hydro can estimate how DSM programs may influence load shape changes and specify programs which best benefit British Columbia.

There is increasing concern and awareness of the contribution of the built environment to global environmental problems such as the depletion of the ozone layer, large-scale soil erosion and deposition, the generation of greenhouse gases, atmospheric hygiene and surface water quality. Me dispersion of refrigerant gases from air conditioning plant, urban stormwater run-off, the energy requirements of space heating and lighting, and waste management and disposal are all significant issues in the impact of buildings on the global environment.

This contribution contains the description of a design and evaluation system which is formulated for the early phases in the building design process. These phases include the conceptual and the preliminary design steps. The design system is based on the idea that the evaluation should be performed on the same kind of data throughout the design process. That means that as the decisions about a number of attributes of the design are not yet taken, the system automatically provides the default values for those attributes.

Developed in this study is the computer simulation program which can predict the temperature and humidity variation in multiroom of a residence, especially under variable opening conditions such as doorway open or close according to inhabitants behaviors. In the multizone infiltration calculation, the special process is devised to make the computation stable, never failing to converge. In the humidity calculation, two parameters related to the absorption and desorption of the surface finishing of a wall are, also, presented.

Computer-based simulation methods offer a powerful and flerible tool for building energy analysis. This paper presents a research study on the thermal and energy perfomance of commercial buildings in Hong Kong using computer modelling techniques on a microcorrputer-based platform. A database of energy simulation results has been generated using a personal computer (PC) version of the DOE-2. ID building energy simulation programme with a generic base case model building and the weather files developed for Hong Kong.

Weather data at thousands of stations throughout the world are compiled for air-conditioning load calculation using a personal computer. Several selected sources of weather data are introduced. Major sources among them are the publication by the British Meteorological Office and the magnetic tape compiled by the Japan Meteorological Agency. Since solar radiation is not included in the major sources, it is supplemented from the other sources. Consequently, two files named BMO and JMA are compiled. A computer program for calling the designated station from the files is developed.

Computer simulations play an important role in programs being conducted by electric utility companies in the United States to reduce customers' demand for electricity. These utility program are referred to as demandside management (DSM) programs and are based on the premise* that energy efficiency can be a cost-effective source of new electricity supply.

The CLIM 2000 software environment was developed by the Electricity Applications in Buildings Branch of the French utility company, Electricité de France. This software, which has been operational since June 1989, allows the behaviour of a whole building to be simulated. The building is described by means of a graphics editor providing multi-windowed dialogue in the form of a set oficons representing the models chosen by the user These models are taken from a library containing about one hundred elementary models supplied on a standard basis by the software.