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Title: | Comparative Analysis of the Energy Performance in Green and Non-green Office Buildings in Dar Es Salaam, Tanzania | Authors: | NKINI, Saul NUYTS, Erik Kassenga, Gabriel Swai, Ombeni VERBEECK, Griet |
Issue Date: | 2023 | Publisher: | Elsevier | Source: | ENERGY AND BUILDINGS, 293 (Art N° 113202) | Abstract: | The rate of energy use around the world in recent years has been alarming. In Africa, and Tanzania in particular, the energy demand for office building is increasing annually as a result of urbanisation, population growth and economic growth. Reducing office buildings' ever-escalating energy use is a critical objective requiring scholarly attention. To contribute to achieving that objective, this study compared the energy performance of 2 green and 15 non-green office buildings in Dar es Salaam, Tanzania. The buildings were sampled purposively. The build-ings' consumption patterns were studied by examining their electricity bills over a five-year period (2015-2019). The buildings' energy consumption data and elements of their designs were analysed using multiple regression models. The study examined four building sets (green buildings, non-green buildings with maximal glazing, non-green buildings with minimal glazing and traditional office buildings). The results indicate that the traditional office buildings, which contained the most climate-responsive design elements of the building types examined, consumed less energy than green-certified office buildings. The modern office buildings with minimal and maximal glass façades consumed the most energy. The buildings with single-split HVAC systems consumed less energy than those with multi/central systems. The study concluded that building classifications and HVAC type are the most significant predictors of energy use, followed by window-to-wall ratio. As East Africa urbanises rapidly, these findings will provide architects, engineers, property managers and policymakers with research-based, real-life data that are specific to their context. Those data can help enhance the performance of green and non-green buildings during their design and operation phases. The study recommends adopting a design strategy that considers both climatic and technical factors in order to optimise building design decisions to lower buildings' energy use. | Keywords: | Energy consumption;Office buildings;Building energy performance;Envelope energy performance;Green building;Energy use intensity | Document URI: | http://hdl.handle.net/1942/40254 | ISSN: | 0378-7788 | e-ISSN: | 1872-6178 | DOI: | 10.1016/j.enbuild.2023.113202 | ISI #: | 001013666300001 | Rights: | 2023ElsevierB.V.Allrightsreserved | Category: | A1 | Type: | Journal Contribution |
Appears in Collections: | Research publications |
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