IBPSA1999

A  method  for  evaluating  solar  rights  and  shading requirements in an urban environment is presented. The method is embedded in a CAD tool developed and adapted for this purpose. With this tool, one can analyze the mutual shading between buildings and other objects like trees. The purpose of this CAD tool is to allow the designer to plan efficiently the various functions of spaces among different structures, like buildings, as well as determining the location of the passive and active solar collectors.

Design of air conditioning systems for efficient and effective part-load operation poses a considerable challenge, but one which is  frequently  not appreciated by the designer tied to traditional design practices. A plant simulation programme used in conjunction with a load calculation programme to assess rapidly the impact of equipment selection and control strategies on plant performance is described with the aid of an example.

This article presents the SIM-FAST software : it is a tool which allows to evaluate the energy consumption and the financial cost of French buildings in the Residential sector. Thanks to the limited number of parameters which must be entered to describe the building, it provides rapid appraisals in less than one hour. It provides global results in terms of both energy consumption and financial cost as well as time-based change of temperatures and flux.  It  operates  under  Windows 95 with 12MB RAM.

A new calculation method is proposed for designing space radiant heating/cooling systems by improving conventional methods of steady and unsteady heat transfer calculation theory which has usually been used for designing of buried pipe floor heating systems. On the new method to calculate room thermal load in radiant heating/cooling system, an operative temperature surrounding occupants are used as system control parameter instead of a space air temperature. Theoretical algorithms and calculation examples are described.

This paper proposes useful techniques of regression analysis to estimate regional water temperatures for the optimum design of the hot water supply system. First yearly trends of changing air temperatures and water temperatures are surveyed about Sapporo, Sendai, Tokyo, Nagoya, Osaka and Kochi, which are typical cities with enough data to analysis from 1991 to 1994. Second three types of the explanatory variable of the regression model are examined: (a) the air temperature on that day, (b) the air temperature 1 or 2 days before and (c) the mean air temperature in a few days of the pasts.

Assimilation of cost-effective Fault Detection and Diagnosis (FDD) technique in building management sys- tem can save enormous amount of energy and material. In this paper, Recursive Autoregressive Exogenous Al- gorithm is used to develop dynamic FDD model for vari- able air volume air handling units. A methodology, based upon frequency response of the model is evolved for automatic fault detection and diagnosis. Results are validated with data obtained from a real building after introducing artificial faults.

Project REED (Residential Energy Efficiency Design) is a Web-based building performance simulation tool developed under contract to one of the nations largest utilities, to help their 4.5 million ratepayers make en- ergy efficient design decisions for their own particular building in their own particular climate.

The paper discusses the development of a computational thermal simulation engine as  an object. The simulation engine utilizes Transfer Function (TF) Algorithms where all TF procedures have been implemented. The simulation is integrated with the Microsoft Windows environment and has been made to take advantage of many of this operating system’s features. In particular, the separate components of the simulation  take advantage of the Windows feature to communicate - Object Linking and Embedding (OLE).

A major goal in computer-aided design research has been the development of integrated design for convenient generation and evaluation of evolving designs. Despite progress in the development of integrated performance simulation systems, a number of usability issues have not been addressed effectively. These include support for the convenient manipulation of geometric and semantic building information. This paper explores the potential for the integration of simulation with existing representations as they are implemented in commercial or research drafting systems.

The purpose of this study is designing a hybrid system which is a combination of radiant cooling and low temperature air conditioning integrated with ice stor- age system. Also this evaluates the performance of the system. We compared energy amount with annual operating costs of conventional air conditioning system and this radiant air conditioning system.