Modelization equations of six approaches for tracking the sun are recalled and used to evaluate the constraints and performances to which they lead to.The geographical study case is taken for the specific latitude of ...Modelization equations of six approaches for tracking the sun are recalled and used to evaluate the constraints and performances to which they lead to.The geographical study case is taken for the specific latitude of 12 North that is a good matching with the location of the country of Burkina Faso.Three decisive periods were locally established in order to consider the different travels of the sun on sky during one year.This work presents some technical data which facilitates the choice of sun tracking approaches with concern of a concentrator limits such as its angle of acceptance,its motion control card interpolation model,or its minimum irradiation level for energy conversion effectiveness.展开更多
This study aims to show the aptitude of a locally made composite for providing thermal comfort and mechanical resistance in buildings in hot-dry climates.The thermal characterization reveals that the thermal diffusivi...This study aims to show the aptitude of a locally made composite for providing thermal comfort and mechanical resistance in buildings in hot-dry climates.The thermal characterization reveals that the thermal diffusivity of the studied material is lower than that of commonly used materials such as agglomerated and full cinderblocks and laterite blocks and therefore is a better insulating material.In addition,its thermal inertia is the highest compared to commonly used materials of agglomerated and full cinderblocks,laterite blocks and compressed earth blocks,which implies a longer time lag.On the basis of mechanical resistance,with a compression resistance of 3.61 MPa,the studied material meets the requirement of CRATerre and NBF 02-003(2009)as a material for construction of single-storey buildings.Therefore,this material,containing 1%Hibiscus sabdariffa fibers and compacted by vibration,is a suitable material for the walls of standing buildings and for thermal comfort in hot dry climates.展开更多
The results of atmospheric effect characterization on the town of Ouagadougou in Burkina Faso are presented and the link with the availability of the direct component of solar radiation is discussed.Experimental meteo...The results of atmospheric effect characterization on the town of Ouagadougou in Burkina Faso are presented and the link with the availability of the direct component of solar radiation is discussed.Experimental meteorological data are treated to set a system of constant references which are used to extrapolate the likely atmospheric effect given by the other experimental meteorological data from 1976 to 2006.As results the periods of strong monthly attenuation of the solar potential are pointed out.展开更多
文摘Modelization equations of six approaches for tracking the sun are recalled and used to evaluate the constraints and performances to which they lead to.The geographical study case is taken for the specific latitude of 12 North that is a good matching with the location of the country of Burkina Faso.Three decisive periods were locally established in order to consider the different travels of the sun on sky during one year.This work presents some technical data which facilitates the choice of sun tracking approaches with concern of a concentrator limits such as its angle of acceptance,its motion control card interpolation model,or its minimum irradiation level for energy conversion effectiveness.
文摘This study aims to show the aptitude of a locally made composite for providing thermal comfort and mechanical resistance in buildings in hot-dry climates.The thermal characterization reveals that the thermal diffusivity of the studied material is lower than that of commonly used materials such as agglomerated and full cinderblocks and laterite blocks and therefore is a better insulating material.In addition,its thermal inertia is the highest compared to commonly used materials of agglomerated and full cinderblocks,laterite blocks and compressed earth blocks,which implies a longer time lag.On the basis of mechanical resistance,with a compression resistance of 3.61 MPa,the studied material meets the requirement of CRATerre and NBF 02-003(2009)as a material for construction of single-storey buildings.Therefore,this material,containing 1%Hibiscus sabdariffa fibers and compacted by vibration,is a suitable material for the walls of standing buildings and for thermal comfort in hot dry climates.
文摘The results of atmospheric effect characterization on the town of Ouagadougou in Burkina Faso are presented and the link with the availability of the direct component of solar radiation is discussed.Experimental meteorological data are treated to set a system of constant references which are used to extrapolate the likely atmospheric effect given by the other experimental meteorological data from 1976 to 2006.As results the periods of strong monthly attenuation of the solar potential are pointed out.
