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

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dc.contributor.advisorMadhlopa, Amosen_ZA
dc.contributor.authorCharitar, Deeptien_ZA
dc.date.accessioned2016-06-23T14:49:36Z
dc.date.available2016-06-23T14:49:36Z
dc.date.issued2015en_ZA
dc.description.abstractBuilding 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.identifier.apacitationCharitar, D. (2015). <i>Numerical study of the thermal performance of solar chimneys for ventilation in buildings</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Energy Research Centre. Retrieved from http://hdl.handle.net/11427/20100en_ZA
dc.identifier.chicagocitationCharitar, Deepti. <i>"Numerical study of the thermal performance of solar chimneys for ventilation in buildings."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Energy Research Centre, 2015. http://hdl.handle.net/11427/20100en_ZA
dc.identifier.citationCharitar, D. 2015. Numerical study of the thermal performance of solar chimneys for ventilation in buildings. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Charitar, Deepti AB - 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. DA - 2015 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2015 T1 - Numerical study of the thermal performance of solar chimneys for ventilation in buildings TI - Numerical study of the thermal performance of solar chimneys for ventilation in buildings UR - http://hdl.handle.net/11427/20100 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/20100
dc.identifier.vancouvercitationCharitar D. Numerical study of the thermal performance of solar chimneys for ventilation in buildings. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Energy Research Centre, 2015 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/20100en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentEnergy Research Centreen_ZA
dc.publisher.facultyFaculty of Engineering and the Built Environment
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherSustainable Energy Engineeringen_ZA
dc.titleNumerical study of the thermal performance of solar chimneys for ventilation in buildingsen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMSc (Eng)en_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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