Numerical study of the thermal performance of solar chimneys for ventilation in buildings

 

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dc.contributor.advisor Madhlopa, Amos en_ZA
dc.contributor.author Charitar, Deepti en_ZA
dc.date.accessioned 2016-06-23T14:49:36Z
dc.date.available 2016-06-23T14:49:36Z
dc.date.issued 2015 en_ZA
dc.identifier.citation Charitar, D. 2015. Numerical study of the thermal performance of solar chimneys for ventilation in buildings. University of Cape Town. en_ZA
dc.identifier.uri http://hdl.handle.net/11427/20100
dc.description.abstract Building ventilation is crucial for improving the indoor air quality and thermal comfort. Nowadays, mechanical ventilation systems such as air conditioning and fans are most commonly used in buildings. However, these devices consume a lot of electricity which is mainly generated from the combustion of fossil fuels, resulting in the release of greenhouse gases and thereby contributing to climate change. Consequently, it is essential to switch to natural ventilation systems which are environmentally friendly as they are based on renewable sources of energy. One such type of natural ventilation system is the solar chimney which can either be roof-mounted or wall-mounted in buildings. The aim of this study was to develop a mathematical model for assessing the thermal performance of roof-mounted (inclined) and wall-mounted (vertical) solar chimneys. The model was validated using numerical simulations in MATLAB. Different configurations of solar chimneys were designed and modelled in MATLAB in order to compare their performances, in terms of the ventilation rate expressed as the number of air changes per hour, ACH. Raw climatic data, including the intensities of global and diffuse solar radiation on a horizontal plane, wind speed and ambient temperature were obtained for Stellenbosch, located in the Western Cape Province of South Africa. This was used for the MATLAB modelling of the solar chimneys. The effects of inclination angle, air gap, chimney height and view factor on the thermal performance of solar chimneys were explored in this study. en_ZA
dc.language.iso eng en_ZA
dc.subject.other Sustainable Energy Engineering en_ZA
dc.title Numerical study of the thermal performance of solar chimneys for ventilation in buildings en_ZA
dc.type Thesis / Dissertation en_ZA
uct.type.publication Research en_ZA
uct.type.resource Thesis en_ZA
dc.publisher.institution University of Cape Town
dc.publisher.faculty Faculty of Engineering & the Built Environment en_ZA
dc.publisher.department Energy Research Centre en_ZA
dc.type.qualificationlevel Masters en_ZA
dc.type.qualificationname MSc (Eng) en_ZA
uct.type.filetype Text
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