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Comprehensive experimental and theoretical investigation of solar radiation conditions in Botswana: A semi-desert region

Nijegorodov, N.; Luhanga, P.V.C.; King, J.G. (Regional Energy Resources Information Center (RERIC) Asian Institute of Technology. http://www.rericjournal.ait.ac.th/index.php/reric/index, December NaN, 2005)

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Abstract:	Please refer to the attached article for the ABSTRACT. Due to technical problems with some scientific formulae it was not possible to upload the abstract HERE.
URI:	http://hdl.handle.net/10311/408

Files in this item: 1

Nijegorodov_IEJ_2005.pdf (2.539Mb)

Comprehensive study of solar conditions in Mozambique: the effect of trade winds on solar components

Nijegorodov, N.I.; Devan, K.R.S.; Simao, H.; Mabbs, R. (Elsevier Science Ltd. www.elsevier.com/locate/renene, NaN, 2003)

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Abstract:

A new algorithm to simulate all solar components and optimum slopes, Bopt, based on new models for direct normal beam and diffuse radiation and an analytical model to predict Bopt, developed at the University of Botswana is applied for complete study of solar conditions in Mozambique. The components of solar radiation depend to a large extent on the number of h of sunshine. However, it is obvious that cloud-cover is determined mainly by the prevailing trade winds, which carry moisture and rain clouds. This is of especial concern in coastal areas. In the current work, hourly, I, daily, H and monthly mean, HÂ¯ components of solar radiation and the optimum slopes of a north-south aligned collector are simulated and analyzed for 21 synoptic stations in Mozambique. Monthly mean daily direct normal, HÂ¯ bn solar radiation maps are plotted for December and June and discussed. It is found that, to a great extent, isoinsolation curves are determined by the prevailing trade winds, mountain chains and coastal conditions. Plotted maps of annual mean daily direct normal and global solar radiation also show tremendous dependence on the prevailing winds. Several special locations in Mozambique with quite high or very low solar radiation components are pointed out and the reasons explained.

URI:

http://hdl.handle.net/10311/267

Files in this item: 1

Nijegorodov_RE28_2003.pdf (2.514Mb)

Solar still for rose water production

Ganesan, C.T. (University of Botswana, http://www.ub.bw, NaN, 1998)

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Abstract:

This paper is the outcome of students'project guided by the author. An attempt has been made to design and develop a solar still for rose production in India. This unit has the following features:i) possibility of tilt adjustments to suit different altitudes of sun,ii) specially designed steep basin for conveniently keeping the rose petals and water in an inclined position and iii)cover which can be opened to facilitate the cleaning operations. This unit supplied 3.7 litres of rose water in three days during winter in Madras, in India. The sunshine and solar radiation particulars of Botswana are shown to indicate that a better climatic conditions prevail here for a higher production rate.

URI:

http://hdl.handle.net/10311/684

Files in this item: 1

Gaesan_bJT_1998.pdf (2.287Mb)

Solar still for rose water production

Ganesan, C.T. (University of Botswana, NaN, 1998)

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Abstract:

This paper is the outcome of students'project work guided by the author. An attempt has been made to design and develop a solar still for rose water production in India. This unit has the following features:i) possibility of tilt adjustments to suit the different altitudes of sun,ii)specially designed stepped basin for conveniently keeping the rose petals and water in an inclined position and iii)cover which can be opened to facilitate the cleaning operations.This unit supplied 3.7litres of rose water in three days during winter in Madras, in India. The sunshine and solar radiation particulars of Botswana are shown to indicate that a better climatic conditions prevail here for a higher production rate.

URI:

http://hdl.handle.net/10311/640

Files in this item: 1

Ganesan_BJT_1998.pdf (345.3Kb)

Total solar radiation received at various collector inclinations

Oladiran, M.T. (Elsevier Science Ltd, http://www.elsevier.com/wps/find/journaldescription.cws_home/405891/description#description, NaN, 1994)

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Abstract:

Solar energy is finding wide application via several energy-saving devices and systems. Its use, especially in rural areas, can often be limited by the non-availability of complete information on insolation data. In this investigation, both the mean extraterrestrial and terrestrial radiations were calculated for three zones in Nigeria. These zones were assumed to be dependent mainly on the latitude, L. The isotropic model was employed for the computation of the diffuse and ground reflected components of radiation. Consequently, the total insolation was obtained for various inclinations of the collector surface. It was found that three solar energy seasons exist for each zone. For maximum total incident radiation, a different collector inclination is ideal for each solar energy season. However, for all year round applications, a fixed inclination varying between L and (L+10) degrees is recommended.

URI:

http://hdl.handle.net/10311/672

Files in this item: 1

Oladiran_AE_1994.pdf (1.391Mb)

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