Thermo-Physical Properties 0f Rubber Seed Useful In The Design Of Storage Structure


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Thermo-physical properties of rubber seed useful in the design of storage structure is a well-researched topic, it is to be used as a guide or framework for your Academic Research


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 (significant at p<0.05). 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 varied exponentially with an increase in moisture content (significant at p<0.05). 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 m
2 /s, respectively. The data obtained are essential in the design of storage structure for the seed


Rubber tree (Hevea brasiliniensis) is one of the
leading commercial agricultural trees in the world and is
one of the most important revenue-generating trees in
Nigeria. Apart from its use in latex production for
foreign exchange, the tree produces oil-bearing seed
whose oil content in dried kernel varies between 35% to
45% and is by far more than that obtainable in jatropha
and karanj seeds[1].

The rubber seed oil is non-edible, but has many areas of potential applications. These include its use in the production of biodiesel as fuel for compression ignition engines, and foaming agent in latex foam in the synthesis of resins used in paints and coatings.

The thermal properties are considered by some
investigators for storing fruits and vegetables and in the
design of heat treatment plants for agricultural materials.
For example, thermal properties of agricultural seed or its
product have the ability of retaining or transmitting heat
when subjected to heat treatment[4] .

Bulk density and true density can be useful in sizing seed hoppers and
storage facilities; they can affect the rate of heat and mass
transfer of moisture during aeration and drying process.
Seed bed with low porosity will have greater resistant to
water vapour escape during the drying process, which
may lead to higher power to drive the aeration fans.
Seed densities have been of interest in breakage
susceptibility and hardness studies[5]

The physical properties such as size and shape are important in the
electrostatic separation from undesirable materials and in
the development of sizing and grading machinery. The
shape of the material is important for an analytical
prediction of its drying behavior[6]

Additional information


Project Topic and Material


Agricultural Engineering

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