The current models of boilers and furnaces which are used in HVAC system simulation programs are primarily concerned with calculating the heat output of the device and its fuel consumption. The formulation of the models relies heavily on empirical terms which are derived from manufacturers' data or testing programmes.
Detailed simulation. of the combustion process involves solution of the flow-field. and chemical reaction rate equations by CFD simulation. The computational intensiveness involved renders this approach infeasible for integration into plant simulation. programs.
The Centre Scientifique, et Technique du Bâtiment and Gaz-de-France carried out a comprehensive study for providing professionals with dimensioning rules for hot water floor heating systems.
In the first phase we used a general purpose finite element analysis program called MARC and developed a three-dimensional mesh integrating the different floor heating components.
In a second phase, simulation results were compared to an experimental result data set created for this study from a test cell specially dedicated to heating floor assessment.
DOE-2 is arguably the most complex and comprehensive building energy simulation program available. However, not even DOE-2 addresses ali situations encountered in commercial office buildings. Most buildings contain one or more of the following situations:
Introduced in late 1993, MarketManager for Windows (MMWIN) is a productivity tool designed to meet the energy analysis needs of Utility DSM departments and of Performance Contractors. In a typical application a building is simulated as-is and compared to one or more energy-saving alternatives.
The ability to integrate a range of disparate design tools has been an area of intense research throughout the world. One of the hardest tasks in this research has been to define the correspondences between the model of a building used by a design tool and the integrated data model. This paper presents a method of defining mappings between different models of a building. The implementation of a mapping management system which controls the flow of data between the varíous models and guarantees the consistency of the models is also described.
We used the MOIST Computer Model to conduct a detailed analysis of the moisture performance of one wall typical of current construction practice in manufáctured housing, and mo new altemative wall designs with potential for better moisture performance in a wider variety of climates. The analysis showed that the current-practice wall with an interior vapor retarder performed acceptably in a cold climate (Madison, WI), but poorly in a hot and humid climate (Miami, FL).
The EPRI LightPAD program is a simple but powerful lighting audit and analysis tool for assessing installed lighting systems and proposing cost-effective, energy-efficient retrofit alternatives. LightPAD enables on-site data entry to the analysis program, improving both speed and accuracy by removing the step of making hand-written field notes.
InteSys Limited has developed a new dynamic simulation model for buildings, which emerges by itself as it receives the data or signals from the building under consideration. The model exists in two forms Software written for PC Windows environment; and Hardware in the forra of a silicon microchip. This work is an extension of the previous work by Jankovic (1991 -1993). The software has been developed in C" and runs under Windows 3.1 or above. The paper describes the operation of this software.
Conventional control schernes for air condítioning systems are in lack of the capabilities to adapt to a changing enviroranent and to optimize against given criteria. In this paper, a methodology is presented, which employs a classifier system with genetic algorithm to enable an air-conditioning controller to learn from its own experience the best control strategy against a given performance evaluation scherne.
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