Optimising the imbaula stove

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dc.contributor.author Kimemia, D.K.
dc.contributor.author Annegarn, H.J.
dc.contributor.author Robinson, J.
dc.contributor.author Pemberton-Pigott, C.
dc.contributor.author Molapo, V.
dc.date.accessioned 2012-11-12T18:24:06Z
dc.date.available 2012-11-12T18:24:06Z
dc.date.issued 2011
dc.identifier.citation Kimemia, D.K. et al. 2011. Optimising the Imbaula stove. Paper presented at the Domestic Use of Energy (DUE) Conference: Cape Town, South Africa. en_US
dc.identifier.uri http://hdl.handle.net/10210/8179
dc.description.abstract In South Africa, human and environmental health implications from domestic solid fuel combustion have spurred interest in cleaner alternative sources of energy and better combustion technologies. Field research among wood and coal burning informal settlements in Johannesburg has shown that the most prevalent mode of combustion is self-made imbaula (brazier) stoves, manufactured from discarded 20 L steel drums. Such stoves are made without any measure of performance optimisation, leading to fuel inefficiency and high emissions - previous field surveys have indicated that the number, size and placement of primary and secondary air inlets (taken as holes below and above the fire grate respectively) vary over a wide range, starting from an extreme with no holes below the grate [1]. Researchers at SeTAR Centre, University of Johannesburg, have set out to develop an enhanced imbaula, by investigating performance in terms of size and distribution of primary and secondary air inlets, and height of grate level. The test imbaulas are constructed out of standard 20 L drums with a height of 360 mm and diameter of 295 mm. A range of hole configurations has been designed, from which selected test configurations are fabricated for experimental evaluation of thermal and emissions properties, using the SeTAR heterogeneous testing protocol. The results indicate that higher hole densities (above and below the grate) lead to higher power outputs and lower specific CO emissions, but with lower thermal efficiency. Further, results indicate that adequate air holes below the grate (primary air) are more important for proper combustion in an imbaula; however this should be synchronised with secondary air in-lets (above the grid) in order to have congruence of all the performance criteria. This study should lead to the development of a set of criteria that can further enhance emissions reductions and fuel efficiency obtained by top-down stove ignition methods (Basa njengo Magogo) for imbaula type stoves. en_US
dc.language.iso en en_US
dc.publisher New Dawn Engineering en_US
dc.rights © D.K. Kimemia, H.J. Annegarn, J. Robinson, C. Pemberton-Pigott and V. Molapo, 2011 en_US
dc.subject Imbaula stoves en_US
dc.subject Domestic stoves en_US
dc.subject Fuel combustion en_US
dc.subject Stove ignition en_US
dc.subject Basa njengo Magogo en_US
dc.title Optimising the imbaula stove en_US
dc.type Article en_US

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