Optimasi rancangan untuk meminimumkan biaya konstruksi alat pengering efek rumah kaca-hibrid (ERK-Hibrid) untuk jagung
2010
Nelwan L.O.
A study on optimization of design to minimize construction cost of greenhouse effect-hybrid (GHE-hybrid) corn dryer has been conducted. The main objective of this study was to optimize the design in minimizing construction cost of GHE-hybrid corn dryer. In detail, the aim of the study were to evaluate performance of greenhouse effect-hybrid (GHE-hybrid) corn dryer, to simulate process of corn drying with GHE-hybrid dryer, and to estimate operating cost of GHE-hybrid corn dryer. Optimization method used in this study was Lagrange Multiplier method. The results of this study showed that drying 1526 kg corn with initial moisture content 25.7 percent wet basis until 16.7 percent wet basis required 14 hours. By using Lagrange Multiplier optimization method, optimum design of GHE-hybrid corn dryer could be obtained. Design of optimum components of GHE-hybrid obtained were 16.21 square m of drying housing area, 2117.86 W of power supply to run blower and 14.61 square m of heat exchanger area, with the minimum construction cost was Rp 19,596,587. Those optimum design was obtained from the drying process of 1526 kg corn for 14 hours, at average solar irradiation about 421.43 W/square m. In conclusion, optimum design of GHE-hybrid was influenced by drying process condition where the GHE-hybrid corn dryer will be applied.
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