![Simulation of buoyancy-induced flow in open cavities for natural ventilation [An article from: Energy & Buildings]](https://www.ebooknetworking.net/books/B00/0RR/bigB000RR9ZHA.jpg)
Simulation of buoyancy-induced flow in open cavities for natural ventilation [An article from: Energy & Buildings]
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This digital document is a journal article from Energy & Buildings, published by Elsevier in 2006. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
Solar heated open cavities including solar chimneys and double facades were studied for enhancing natural ventilation of buildings. A commercial CFD package was used to predict buoyant air flow and flow rates in the cavities. The CFD model was validated against measured data from the literature and good agreement between the prediction and measurement was achieved. The effect of the cavity width of solar chimneys and double facades on the buoyancy-induced ventilation rate was investigated. It was found that there existed an optimum cavity width for maximising the buoyancy-induced flow rate and the optimum width was between 0.55 and 0.6m for a solar chimney of 6m high. The ventilation rate in a double facade of four-storeys high generally increased with cavity width but decreased with floor level from bottom to top. Integration of photovoltaics into a double facade increased the ventilation rate while reducing its variation from floor to floor.
Description:
Solar heated open cavities including solar chimneys and double facades were studied for enhancing natural ventilation of buildings. A commercial CFD package was used to predict buoyant air flow and flow rates in the cavities. The CFD model was validated against measured data from the literature and good agreement between the prediction and measurement was achieved. The effect of the cavity width of solar chimneys and double facades on the buoyancy-induced ventilation rate was investigated. It was found that there existed an optimum cavity width for maximising the buoyancy-induced flow rate and the optimum width was between 0.55 and 0.6m for a solar chimney of 6m high. The ventilation rate in a double facade of four-storeys high generally increased with cavity width but decreased with floor level from bottom to top. Integration of photovoltaics into a double facade increased the ventilation rate while reducing its variation from floor to floor.
