In this work, the Specific Energy Consumption (SEC) and machine capacity for a Moringa oleifera seed shelling machine were determined in relation to the cylinder speed and seed sizes. A M. oleifera seed shelling machine was tested and the SEC was appraised. The SEC and machine capacity of the M. oleifera seed shelling machine were determined at five speed levels, viz. 200, 240, 280, 320 and 360 rpm using three seed sizes (viz. small, medium and large seed sizes). The SEC and machine capacity increased with the seed sizes during the shelling process. The same trend was observed for the relationship between the SEC and cylinder speed. The minimum values obtained for the SEC using the small, medium and large M. oleifera seed sizes were 31.25, 40.07 and 54.22 Wh·kg–1, respectively, at a cylinder speed of 200 rpm while the maximum values obtained for the small, medium and large seed sizes were 58.01, 74.37 and 100.63 Wh·kg–1, respectively, at a cylinder speed of 360 rpm. The optimum values obtained for the machine capacity were 14.58, 11.38 and 8.41 kg×h–1 using the small, medium and large seed sizes, respectively. Conclusively, this study shows that the SEC and machine capacity were affected by the variation in the cylinder speed and seed sizes.
ASABE (2008): Standards S352.2: Moisture Measurement-Unground Grains and Seeds. St. Joseph, American Society of Agricultural and Biological Engineers.
Bitra V.S., Womac A.R., Igathinathane C., Miu P.I., Yang Y.T., Smith D.R., Chevanan N., Sokhansanj S. (2009): Direct measures of mechanical energy forknife mill size reduction of switch grass, wheat straw, and corn stover. Bioresource Technology, 100: 6578–6585. https://doi.org/10.1016/j.biortech.2009.07.069
Dalha I.B. (2013): Modification and performance evaluation of IAR groundnut sheller for some selected varieties of pulses. [M.Sc. Thesis, unpublished] Zaria, Ahmadu Bello Univer-sity.
Das S.K., Gupta R.K. (2005): Effects of impeller vane configurations and seed size on dehull-ing efficiency of sunflower seeds using a centrifugal sheller. International Journal of Food Engineering, 1: 1–7.
Fadele O.K. (2018): The development and optimization of Moringa oleifera (Lamarck) seed shelling machine. [Ph.D. Thesis] Ibadan, University of Ibadan.
Fadele O.K., Aremu A.K. (2017): Performance evaluation of some tangential impact shelling devices for moringa seed shelling. Agricultural Engineering International: CIGR Journal, 19: 170–180.
Fadele O.K., Aremu A.K. (2018): Optimization of shelling efficiency of a Moringa oleifera seed shelling machine based on seed sizes. Industrial Crops and Products, 112: 775–782. https://doi.org/10.1016/j.indcrop.2018.01.011
FAO (2002): Food and Agriculture Organization-Groundnut Post-harvest Operations. Availa-ble at http://www.fao.org/publications/card/en/c/30524096-c4bf-44d5-9895-5e76bebe8468/
Fakayode O.A. (2015): Process optimisation of mechanical oil expression from Moringa oleif-era (Lam.) (Moringa) seeds. [Ph.D. Thesis] Ibadan, University of Ibadan. https://doi.org/10.1016/j.indcrop.2016.06.017
Gingerich J., Hendrickson O. (1993): The theory of energy return on investment acase-study of whole tree chipping for biomass in Prince-Edward-Island. Forestry Chronicle, 69: 300–306. https://doi.org/10.5558/tfc69300-3
Gupta R.K., Das S.K. (1999): Performance of centrifugal dehulling system for sunflower seeds. Journal of Food Engineering, 42: 191–198. https://doi.org/10.1016/S0260-8774(99)00119-3
Ghorbani Z., Masoumi A.A., Hemmat A. (2010): Specific energy consumption for reducing the size of alfalfa chops using a hammer mill. Biosystems Engineering, 105: 34–40. https://doi.org/10.1016/j.biosystemseng.2009.09.006
Ghorbani Z., Masoumi A.A., Hemmat A., Amiri Chayjan R., Majidi M.M. (2011): Principal component modeling of energy consumption and some physical-mechanical properties of al-falfa grind. Australian Journal of Crop Science, 5: 932–938.
Kabutey A., Herák D., Dajbych O., Divišová M., Boatri W.E., Sigalingging R. (2014): De-formation energy of Jatropha curcas L. seeds under compression loading. Research in Agri-cultural Engineering, 60: 68–74. https://doi.org/10.17221/15/2012-RAE
Lawrence A., Thollander P., Andrei M., Karlsson M. (2019): Specific energy consumption/use (SEC) in energy management for improving energy efficiency in industry: meaning, usage and differences. Energies, 12: 247. Liu Y. Wang J., Wolcott M.P. (2016): Assessing the spe-cific energy consumption and physical properties of comminuted Douglas-fir chips for bio-conversion. Industrial Crops and Products, 94: 394–400.
Mani S., Tabil L.G., Sokhansanj S. (2004) Grinding performance and physical properties of wheat and barley straws, corn stover and switchgrass. Biomass Bioenergy, 27: 339–352. https://doi.org/10.1016/j.biombioe.2004.03.007
Ojolo S.J., Damisa O., Orisaleye J.I., Ogbonnaya C. (2010): Design and development of cash-ew nut shelling machine. Journal of Engineering, Design and Technology, 8: 146–157. https://doi.org/10.1108/17260531011062528
Opáth R. (2014): Technical exploitation parameters of grinding rolls work in flour mill. Re-search in Agricultural Engineering, 60: S92–S97. https://doi.org/10.17221/41/2013-RAE
Repellin V., Govin A., Rolland M., Guyonnet R. (2010): Energy requirement for fine grinding of torrefied wood. Biomass Bioenergy, 34: 923–930. https://doi.org/10.1016/j.biombioe.2010.01.039
Singh R., Mangaraj S. (2013): Development and evaluation of centrifugal sheller for musk-melon seed. International Research Journal of Biological Sciences, 2: 7–10.
Sobowale S.S., Adebiyi J.A., Adebo O.A. (2016): Design and performance evaluation of a melon sheller. Journal of Food Process Engineering, 39: 676–682. https://doi.org/10.1111/jfpe.12259
Zheng Y., Wiesenborn D.P., Tostenson K., Kangas N. (2005): Energy analysis in the screw pressing of whole and dehulled flaxseed. Journal of Food Engineering, 66: 193–202. https://doi.org/10.1016/j.jfoodeng.2004.03.005