Thermo-physical properties of rubber seed useful in the design of storage structure
Abstract
(Department of Agricultural and Bioresources Engineering, Federal University of Technology, Minna, Nigeria)
Abstract: This study was carried out to determine the thermo-physical properties of rubber seed in the moisture range of 9.1% to 14.8% (w.b.). The length, width, thickness, measured surface area, bulk density and true density increased with increasing moisture content with high coefficients of determination. Their optimum values at 14.8% moisture content were 17.00 mm, 11.94 mm, 8.26 mm, 285.20 mm2, 295.00 kg/m3 and 470.67 kg/m3, respectively. The angle of repose increased as moisture content increased with low coefficient of determination and has optimum value of 28.81° at 14.8% moisture content. The specific heat capacity and thermal conductivity decreased linearly while thermal diffusivity increased exponentially with an increase in moisture content. The optimum values of specific heat capacity, thermal conductivity and diffusivity at 14.8% moisture content were 55.84 kJ/(kg.K), 0.032 W/(m.K) and 1.93×10-9 m2/s, respectively. The results are essential in the design of storage structure for rubber seed.
Keywords: thermo-physical properties, rubber seed, storage, specific heat capacity, bulk density, storage structure design
DOI: 10.3965/j.ijabe.20120502.008
Citation: Fadeyibi A, Osunde Z D. Thermo-physical properties of rubber seed useful in the design of storage structure. Int J Agric & Biol Eng, 2012; 5(2): 62－66.
Keywords
References
Haque M A, Islam M P, Hussain M D, Khan F. Physical, mechanical properties and oil contents of selected indigenous seeds available for biodiesel production in Bangladesh: Agricultural Engineering Institute. CIGR Ejournal, 2009; Manuscript 1419: 11(1).
Iyayi A F, Akpaka P O, Ukpeoyibo U, Balogun F E, Momodu I O. Rubber seed oil: An oil with great potential. Chemtech Journal, 2007; 3(1): 507-516.
Moura S C S R, Germer S P M, Jardim D C P, Sadahira M S. Thermo physical properties of tropical fruit juices. Brazilian Journal of Food Technology, 1998; 70(1): 47-53.
Aremu A K, Falade O K. Moisture dependent thermal
properties of doum palm fruit (yphaene thebaica): Journal of Emerging Trend in Engineering and Applied Science (JETEAS), 2010; 1(2): 199-204.
Heidarbeigi K, Ahmadi H, Khuralipour K, Tabatabaeefar A. Some physical and mechanical properties of Iranian wild Pistachio (Pistachio mutica L.). American Eurasian Journal of Agricultural and Environmental Sciences, 2008; 3(4): 521-525.
Esref I, Halil U. Moisture dependent physical properties of white speckled red kidney bean grains. Journal of Food Engineering, 2007; 82(1): 209- 216.
Iyayi A F, Akpaka P O, Ukpeoyibo U. Rubber seed processing for value added latex production in Nigeria. Africa Journal of Agricultural Research, 2008; 3(7): 505-509.
Otoide V O, Begho E R. An assessment of some methods of storage of rubber seeds as undefatted seed cake. In: EE Enabor (Ed). Industrial Utilization of Natural Rubber (Hevea brasiliansis) Seed, Latex and Wood: RRIN, Benin City, 1986; pp. 130-134.
A O A C. Official methods of analysis: Association of official analytical chemists, 2002, Gathersburg, ML, USA.
Ogut H. Some physical properties of white lupin. Journal of Agricultural Engineering Research, 1998; 69(1): 237-277.
Jain R K, Bail S. Properties of pearl millet. Journal of Agricultural Engineering Research, 1997; 66(1): 85-91.
Amer Eissa A H, Mohamed M A, Moustafa H, Alghannam A R O. Moisture dependent physical and mechanical properties of chickpea seeds. International Journal of Agricultural and Biological Engineering, 2010; 3(4): 1-14.
Bamgboye A I, Adejumo O I. Thermal properties of roselle seeds. International Agrophysics, 2010; 24(1): 85-87.
Sweat V E. Thermal properties of pecane: Paper Presented at the UPADI 84, Caracas, Venezuela, Oct. 28-Nov. 2, 1984.
Mahmoud T, Hamed T, Ali R. Hojat A, Seyed Mohammad Taghi G Z. Moisture dependant physical properties of barley grains. International Journal of Agricultural and Biological Engineering, 2009; 2(4): 1-8.
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