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.
The LESCOM program using the Response Factor Method developed by the authors was applied to the direct gain system and calculation of fluctuations in room temperature. Regarding the solar water collector, the efficiency straight line was obtained from the measured values. The one-dimensional thermal stratification was applied to the water storage tank. It was discovered from the measured values that relations between the amount of solar radiation on the solar cells and the amount of power generation in photovoltaic power generation could be formulated in the linear equation.
The operation of technical building devices demands a lot of heating, cooling and electric energy. This also causes monetary costs and pollutant emission as well. Optimization investigations are very useful to make the running of plants more efficient. This paper shows two optimization methods. Some practical applications clearly demonstrate the profits of an optimized operation of technical building installation.
Login