Theoretical & Experimental Analysis of the ~ > direct & Global Solah Radiation of Add Is Ababa Region
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Date
1985-10
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Addis Ababa University
Abstract
The thesis submittGd is dividGd into three part81
theoJ:eticalJ computRtional, and experimental"
In the first .p. art... R.- eneral theory of attenuation of
solRr radiation in the atmosphGl'G due to molecular scatterlng,
wat~)~' vapour and aerosol absorpt ion is presented" The
theoretical consideration inclUdes integral turbidity factor
and its relation to different absorption n}(~Ch'l.llisms. The
c3.lcul'J.ted value due to the above absol'ption llIechanismsand
the integral turbidity factors for Addis Ababa region, are
shown in ChRptel' '1'wo.
III the second. part of the thesis different empirical
£ol'lllul(1-s relaU,ng gIob:).} solar radiation, geographical and
meteoroIogical parameters of a given locality are collected.
The most general formula by S'aiyigh et.al. i29 I has been
cbosen and applied to Addis Ababa region. With constants
given by Sayigh et. al. which 8.1'e claimed to be universal,
considerable discrepanejJ~s were obtained. Because of this
reason, an ef£O).'t was wl1.de to determillG fl, new set of nine
constants of the Sayigl1' s equation whi,ch are applicable
to Addis Ababa region.
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Theoretical & Experimental Analysis