A novel cassava peeling machine that operates on the principle of the lathe was designed, fabricated and tested. The unique peeling principle uses a self-loading, self-adjusting single point cutting tool that can follow the contour of the cut cassava tuber sections or sized lots. The single point cutting tool allows the peeler to peel both freshly harvested cassava tubers and cassava tubers that are up to four days old effectively and efficiently. Test results show a peeling efficiency of over 70% for all categories of tubers and a minimal loss of flesh.
Energy and exergy analyses were carried out on an active 42MW open cycle gas turbine power plant. Data from the power plant record book were employed in the investigation. The First and Second Laws of Thermodynamics were applied to each component of the gas power plant at ambient air temperature range of 21 - 330C. Results obtained from the analyses show that the energy and exergy efficiencies decrease with increase in ambient air temperature entering the compressor. It was also shown that 66.98% of fuel input and 54.53% of chemical exergy are both lost to the environment as heat from the combustion chamber in the energy and exergy analysis respectively. The energy analysis quantified the efficiency of the plant arising from energy losses , while exergy analysis revealed the magnitude of losses in various components of the plant. Therefore a complete thermodynamic evaluation of gas turbine power plants requires the use of both analytical methods.
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