Integrating neural network models with computational fluid dynamics (CFD) for site-specific wind condition |
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Authors: | Yun Kyu Yi Ali M Malkawi |
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Affiliation: | 1. School of Design, University of Pennsylvania, 207 Meyerson Hall, 210 South 34th Street, Philadelphia, PA, 19104, USA
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Abstract: | Most building energy simulations tend to neglect microclimates in building and system design, concentrating instead on building
and system efficiency. Energy simulations utilize various outdoor variables from weather data, typically from the average
weather record of the nearest weather station that is located in an open field, near airports and parks. The weather data
may not accurately represent the physical microclimate of the site, and may therefore reduce the accuracy of simulation results.
For this reason, this paper investigates utilizing computational fluid dynamics (CFD) with neural network (NN) model to predict
site-specific wind parameters for energy simulation. The CFD simulation is used to find selected samples of site-specific
wind conditions. Findings from CFD simulation are used as training data for NN. A trained NN predicts site-specific hourly
wind conditions for a typical year. The outcome of the site-specific wind condition from the neural network is used as wind
condition input for the energy simulation. The results of energy simulation using typical weather station data and site-specific
weather data are compared in this paper, in order to find the possibility of using site-specific weather condition by NN with
CFD to yield more realistic and robust ES results. |
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