DSpace Repository

Energy efficiency interventions for residential buildings in Bloemfontein using passive energy techniques

Show simple item record

dc.contributor.advisor Ngonda, T.N.
dc.contributor.author Kumirai, Tichaona
dc.contributor.other Central University of Technology, Free State. Faculty of Engineering. School of Mechanical Engineering and Applied Mathematics
dc.date.accessioned 2014-10-15T12:47:25Z
dc.date.available 2014-10-15T12:47:25Z
dc.date.issued 2010
dc.identifier.uri http://hdl.handle.net/11462/124
dc.description Thesis (M. Tech. (Mech. Eng.)) -- Central University of Technology, Free state, 2010 en_US
dc.description.abstract The purpose of this research is to minimize the use of active systems in providing thermal comfort in single-family detached, middle to high income residential buildings in Bloemfontein. The typical case study house was selected according to the criteria as reviewed by Mathews et al., (1999). Measurements were taken for seven days (18 – 24 May 2009). The measurements were carried out in the winter period for Bloemfontein, South Africa. Ecolog TH1, humidity and temperature data logger was used in doing the measurements. These measurements included indoor temperatures and indoor relative humidity. Temperature swings of 8.43 ºC and thermal lag of 1 hour were observed. For the period of seven days (168 hours), the house was thermally comfortable for 84 hours. Thermal analysis for the base case house was done using Ecotect™ (building analysis software) and the simulated results were compared with the measured results. A mean bias error (MBE) of between 10.3% ≤≤11.5% was obtained on the initial calibration. The final calibration of the model yielded error between0.364% ≤≤0.365%. The final calibration model which presented a small error was adopted as the base case. Passive strategies were incorporated to the Ecotect™ model (final calibrated model) singly and in combination; then both thermal and space load simulations were obtained and compared to simulations from the original situation (base case) for assessing improvements in terms of thermal comfort and heating, ventilation and air conditioning (HVAC) energy consumption. Annual HVAC electricity savings of up to 55.2 % were obtained from incorporating passive strategies in combination. Incorporating passive strategies resulted in small improvements in thermal comfort. en_US
dc.format.extent 3 113 877 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US en_US
dc.publisher Bloemfontein : Central University of Technology, Free State
dc.subject Central University of Technology, Free State - Dissertations en_US
dc.subject Architecture and energy conservation - South Africa - Bloemfontein en_US
dc.subject Dwellings - Energy conservation - Economic aspects en_US
dc.subject Building materials - Thermal properties en_US
dc.subject Dwellings - Heating and ventilation en_US
dc.subject Dissertations, academic - South Africa - Bloemfontein en_US
dc.title Energy efficiency interventions for residential buildings in Bloemfontein using passive energy techniques en_US
dc.type Thesis en_US
dc.rights.holder Central University of Technology, Free State

Files in this item

This item appears in the following Collection(s)

Show simple item record

Search DSpace


My Account