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Performance Evaluation of Locally Fabricated Electric Dryer

机译：国产电热干燥机性能评估

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摘要

The performance of a locally fabricated electric dryer with a design based on both an extraction and pressure aeration system was evaluated by drying 10 kilograms of 2 mm thick sliced locally grown pumpkin. The average dryer efficiency was 70 % and the average specific heat consumption was 1,726 KJ/Kg H_20, which was equivalent to 0.48K Whr/kg H_2O. The assumed 50 % recirculation of outlet air increased the inlet humidity ratio by 46.1 % and the enthalpy by 50.5 %. The increased enthalpy and humidity ratio of the inlet air minimized the energy consumption by heat recuperation and avoided case hardening of the product, respectively. The drying time for 10 kilograms of product was concluded to be 15 hours. The quality of the dried products was good in terms of color and shape. Minimal heat loss was observed from the dryer.
机译：通过干燥10千克2毫米厚的切片本地生长南瓜，评估了具有基于抽气和压力曝气系统设计的本地制造的电动干燥机的性能。平均干燥机效率为70％，平均比热消耗为1,726 KJ / Kg H_20，相当于0.48K Whr / kg H_2O。假定出口空气再循环为50％，则使进口湿度比增加46.1％，焓增加50.5％。进气的增加的焓和湿度比分别通过热回收使能耗最小化，并避免了产品的表面硬化。 10千克产品的干燥时间被认为是15小时。干燥产品的颜色和形状质量良好。从干燥机中观察到的热损失最小。

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