The profitability of green retrofitting the building envelope of commercial buildings in Cape Town

 

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dc.contributor.advisor Le Jeune, Karen en_ZA
dc.contributor.author Botha, Jaco en_ZA
dc.date.accessioned 2018-02-09T07:09:17Z
dc.date.available 2018-02-09T07:09:17Z
dc.date.issued 2017 en_ZA
dc.identifier.citation Botha, J. 2017. The profitability of green retrofitting the building envelope of commercial buildings in Cape Town. University of Cape Town. en_ZA
dc.identifier.uri http://hdl.handle.net/11427/27428
dc.description.abstract A notion exists that the operational savings stemming from Deep Energy Retrofits are not sufficient to justify its capital outlay. This notion has focused property developers' attention on the construction of new green buildings, rather than optimizing existing building stock. Producing new buildings, while many existing properties are utilized on a sub-optimal level, with low rental income and high vacancies is not only resource inefficient, but also contributes to a much greater carbon footprint. The aim of this research is to establish whether retrofitting is a viable means of optimizing energy consumption in buildings based on investment return. The literature reveals that the façade is the most significant variable in energy optimisation in buildings and concluded that over-cladding strategies are generally the most efficient means to reduce heat transfer and control lighting levels. The research have been conducted by means of a two tiered methodology involving a case study approach, along with an experimental design, which was conducted through a simulation. A hypothetical building, representative of Cape Town's building stock was modeled and a number of façade over-clad strategies simulated to derive the most optimal solution. The simulation is conducted in DOE Energy Plus and COMFEN GUI. Capital cost data was collected and compared to energy cost savings in order to determine payback values. It was found that over-clad strategies may be economically feasible, which delivered payback periods of between 5 and 19 years, depending on the strategy. A partial retrofit, involving only the East and West facades was found to be the most feasible from an investment point of view, where woven mesh screens delivered the best results. en_ZA
dc.language.iso eng en_ZA
dc.subject.other Property Studies en_ZA
dc.title The profitability of green retrofitting the building envelope of commercial buildings in Cape Town en_ZA
dc.type Master Thesis
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 and the Built Environment
dc.publisher.department Department of Construction Economics and Management en_ZA
dc.type.qualificationlevel Masters
dc.type.qualificationname MSc en_ZA
uct.type.filetype Text
uct.type.filetype Image
dc.identifier.apacitation Botha, J. (2017). <i>The profitability of green retrofitting the building envelope of commercial buildings in Cape Town</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Construction Economics and Management. Retrieved from http://hdl.handle.net/11427/27428 en_ZA
dc.identifier.chicagocitation Botha, Jaco. <i>"The profitability of green retrofitting the building envelope of commercial buildings in Cape Town."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Construction Economics and Management, 2017. http://hdl.handle.net/11427/27428 en_ZA
dc.identifier.vancouvercitation Botha J. The profitability of green retrofitting the building envelope of commercial buildings in Cape Town. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Construction Economics and Management, 2017 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/27428 en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Botha, Jaco AB - A notion exists that the operational savings stemming from Deep Energy Retrofits are not sufficient to justify its capital outlay. This notion has focused property developers' attention on the construction of new green buildings, rather than optimizing existing building stock. Producing new buildings, while many existing properties are utilized on a sub-optimal level, with low rental income and high vacancies is not only resource inefficient, but also contributes to a much greater carbon footprint. The aim of this research is to establish whether retrofitting is a viable means of optimizing energy consumption in buildings based on investment return. The literature reveals that the façade is the most significant variable in energy optimisation in buildings and concluded that over-cladding strategies are generally the most efficient means to reduce heat transfer and control lighting levels. The research have been conducted by means of a two tiered methodology involving a case study approach, along with an experimental design, which was conducted through a simulation. A hypothetical building, representative of Cape Town's building stock was modeled and a number of façade over-clad strategies simulated to derive the most optimal solution. The simulation is conducted in DOE Energy Plus and COMFEN GUI. Capital cost data was collected and compared to energy cost savings in order to determine payback values. It was found that over-clad strategies may be economically feasible, which delivered payback periods of between 5 and 19 years, depending on the strategy. A partial retrofit, involving only the East and West facades was found to be the most feasible from an investment point of view, where woven mesh screens delivered the best results. DA - 2017 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2017 T1 - The profitability of green retrofitting the building envelope of commercial buildings in Cape Town TI - The profitability of green retrofitting the building envelope of commercial buildings in Cape Town UR - http://hdl.handle.net/11427/27428 ER - en_ZA


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