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IJBPS Table of Content: August 2015 3(2)

Research Paper

Fadairo, Olurotimi Olakunle and Ajala, Adewale Oluwabunmi.  pp. 27 - 32

TOWARDS SUSTAINABLE BURNT BRICKS PRODUCTION IN AKURE, ONDO STATE - NIGERIA

 

           

This paper is an experimental pilot test conducted at the Ceramics section of the Department of Industrial Design, Federal University of Technology, Akure to explore the possibility and sustainability of producing refractory burnt bricks in Akure, Ondo State – Nigeria. Physical characteristic tests were conducted on clay types sourced at different locations within Akure. Samples were taken and processed at various stages of production from mining, processing, storage, forming to firing. Result of the tests includes colour change, shrinkage, size variation, compressive strength and rate of water absorption.

Keywords: Refractory, Shrinkage, Lining, Formulation, Insulating and Binder.


Ojo, M. O2 and Sanusi, Y. K.1pp. 33 - 38

BASIC REQUIREMENTS OF USING KRIGING INTERPOLATION METHOD FOR CONSTRUCTION OF CLEARNESS INDEX CONTOUR MAPS: A CASE STUDY OF SIX SELECTED TROPICAL STATIONS IN SOUTH-WESTERN, NIGERIA

 

           

Clearness index map can be described as a two dimensional representation of three dimensional data inform of contour. In this study, kriging Technique was adopted in the construction of clearness index maps for some selected tropical stations in the South western, Nigeria. Characterization of solar radiation was carried out to assess the feasibility of solar renewable energy utilization in the region. Clearness index, diffuse ratio and diffuse co-efficient are computed from the acquired data of global solar radiation, maximum and minimum temperature, and relative humidity obtained from the satellite-derived data from National Aeronautic and space Administration (NASA). A characterization of the sky conditions over the stations based on the calculated clearness index kT values for the eleven years (January, 1995 – December, 2005) were presented. All monthly irradiance data given as mean monthly radiation are transformed into monthly clearness index values through the application of kriging technique. Finally, the monthly mean clearness index contour maps were equally constructed for the stations for selected years using kriging interpolation method as presented by Beryer et al, 1997. The results revealed that the values of global solar radiation computed vary from 12.248 – 20.844 MJm-2day-1 in Abeokuta, 12.880 – 21.744 MJm-2day-1 in Ado Ekiti , 12.064 - 21.888 MJm-2day-1 in Akure, 12.600 – 19.224 MJm-2day-1 in Ikeja , 12.960 – 22.916 MJm-2day-1 in Ogbomoso and 12.420 – 21.276 MJm-2day-1 in Osogbo. The results revealed that the clearness index varies with the geographical location and period of the year. The implications of these results on the effective utilization of solar energy are discussed. The results in this study serve as very useful information for engineers and other renewable energy technologists in the process of designing and estimation of performance of solar application systems.

Keywords: kriging Technique, Solar radiation, Clearness index, Diffuse ratio, Diffuse co-efficient, clearness index maps.