"Design And Development Of Direct Passive Solar Dryers With Blue, White And Yellow Glazing Materials For Drying Of Herbs":- Benjamin Uchechukwu G
ABSTRACT
The research presents the design and development
of three direct passive solar dryers with blue, white and yellow glazing
colours incorporated with pebbles as thermal storage material placed on the
absorber plate. The dryers were operated and tested under ambient conditions of
temperature and relative humidity ranges of 30.6°C - 44.3°C and 54.7%-24.9%
respectively. Dryer with yellow glazing recorded the highest average drying
temperature and lowest average drying chamber relative humidity of 37.68°C and 39.06%
respectively followed by white and blue glazing dryers of values 37.6°C and
37.1°C with corresponding average relative humidity of 39.56% and 39.99%. This
result reflected in the drying rates of bitter leaves and lim tree leaves used
in testing the dryers. Statistical analysis at 5% probability level showed that
glazing colours and drying time had significant effect on the moisture content
level of bitter leaves and lim tree leaves. Moreover, colour analysis of the
dried bitter leaves and lim tree leaves showed that yellow glazing dryer
recorded the best colour code values closest to natural green with values of
165 out 255 in lim tree and 85 out of 255 for bitter leaves on natural green
colour coding scale compared to white and blue glazing dryers.
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-- (2025). "Design And Development Of Direct Passive Solar Dryers With Blue, White And Yellow Glazing Materials For Drying Of Herbs":- Benjamin Uchechukwu G. Repository.mouau.edu.ng: Retrieved Apr 29, 2025, from https://repository.mouau.edu.ng/work/view/design-and-development-of-direct-passive-solar-dryers-with-blue-white-and-yellow-glazing-materials-for-drying-of-herbs-benjamin-uchechukwu-g-7-2
--. ""Design And Development Of Direct Passive Solar Dryers With Blue, White And Yellow Glazing Materials For Drying Of Herbs":- Benjamin Uchechukwu G" Repository.mouau.edu.ng. Repository.mouau.edu.ng, 18 Mar. 2025, https://repository.mouau.edu.ng/work/view/design-and-development-of-direct-passive-solar-dryers-with-blue-white-and-yellow-glazing-materials-for-drying-of-herbs-benjamin-uchechukwu-g-7-2. Accessed 29 Apr. 2025.
--. ""Design And Development Of Direct Passive Solar Dryers With Blue, White And Yellow Glazing Materials For Drying Of Herbs":- Benjamin Uchechukwu G". Repository.mouau.edu.ng, Repository.mouau.edu.ng, 18 Mar. 2025. Web. 29 Apr. 2025. < https://repository.mouau.edu.ng/work/view/design-and-development-of-direct-passive-solar-dryers-with-blue-white-and-yellow-glazing-materials-for-drying-of-herbs-benjamin-uchechukwu-g-7-2 >.
--. ""Design And Development Of Direct Passive Solar Dryers With Blue, White And Yellow Glazing Materials For Drying Of Herbs":- Benjamin Uchechukwu G" Repository.mouau.edu.ng (2025). Accessed 29 Apr. 2025. https://repository.mouau.edu.ng/work/view/design-and-development-of-direct-passive-solar-dryers-with-blue-white-and-yellow-glazing-materials-for-drying-of-herbs-benjamin-uchechukwu-g-7-2