Composite thermal walls for low energy Brazilian homes

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dc.contributor.author Avila, Juliana en
dc.contributor.author Ismail, Kamal A.R. en
dc.date.accessioned 2017-09-19T12:48:51Z
dc.date.available 2017-09-19T12:48:51Z
dc.date.issued 2017 en
dc.description Papers presented at the 13th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Portoroz, Slovenia on 17-19 July 2017 . en
dc.description.abstract The objective of this study is to investigate the behavior of thermal walls as elements in low energy consumption buildings and residences. The problem is formulated based on one dimensional model and solved numerically by finite difference technique. Numerical tests were realized to optimize the numerical grid. Two wall arrangements were investigated; simple wall with incorporation of external surface colour, bio mass additives to construction slabs, and double wall with and without spacing filled with stagnant air. The influence of these variations on the maximum internal ambient temperature and the corresponding time lag with respect to the maximum external surface temperature were calculated for each case. Results indicated that increasing wall thickness reduces the internal peak temperature and delays its occurrence. Light colour paints and wall planted vegetation have similar effects as increasing wall thickness. Low thermal conductivity material and use of surface finishing mortar mixed with dry biomass helps reducing the solar heat gain, internal ambient temperature and increasing the time lag. The spacing between the walls can reduce significantly the heat transferred to internal living space and increases both the thermal comfort and the temperature time lag. en
dc.description.sponsorship International centre for heat and mass transfer. en
dc.description.sponsorship American society of thermal and fluids engineers. en
dc.format.extent 6 pages en
dc.format.medium PDF en
dc.identifier.uri http://hdl.handle.net/2263/62445
dc.language.iso en en
dc.publisher HEFAT en
dc.rights University of Pretoria en
dc.subject Thermal walls en
dc.subject Low energy en
dc.subject Brazilian homes en
dc.title Composite thermal walls for low energy Brazilian homes en
dc.type Presentation en


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