主动间接模式太阳能干燥机进气特性优化:响应面法

P. Etim
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摘要

研究了在主动间接式太阳能干燥机中空气流入对干燥效果的影响。采用响应面法(Response Surface Methodology, RSM)对主动式间接特征太阳能干燥机的气流特性进行了优化研究。实验的影响因素包括实验产品的产品切片厚度和烘干机的通风量。这两个因素在5个水平上被考虑,总共推导了13个实验运行。通风口基于以下形状方向:方形、矩形、圆形和三角形。产品的厚度分为4、8、12、16和20毫米五个级别。实验装置的响应是空气流速和阻力,这是由建立的方程确定的。风速和阻力的最优值分别为0.0275 m3/s和0.0476N。相应的最优条件为:空气流量为100 cm2的方形进口,产品片厚为20 mm;阻力为80 cm2的矩形进口,产品片厚为20 mm。该模型对空气流量和阻力的r平方值分别为0.9463和0.9376,理想度分别为99.2%和95.0%。在最佳条件下重复实验,验证最佳反应。预测值与实验值的差异小于8%。
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Optimization of air inlet features of an active indirect mode solar dryer: A response surface approach
The effect of air flowing into an in an active indirect mode solar dryer was studied. The study aimed at optimizing the airflow features of a solar dryer of active indirect feature using Response Surface Methodology (RSM). The factors of the experiment included the product slice thickness of the experimental product and the air vent of the dryer. The two factors were considered at five levels and a total of 13 experimental runs derived. The air vent was based on the following shape orientations: square, rectangular, circular, and triangular. The thickness of the product was considered at five levels of 4, 8, 12, 16 and 20 mm. The responses from the experimental set up were the air flow rate and drag force, which were determined using established equations. The optimum values for the air flow rate and drag force were 0.0275 m3/s and 0.0476N, respectively. The corresponding optimal conditions which gave the optimum responses were 100 cm2 - square inlet and product slice thickness of 20 mm for air flow rate and 80 cm2 -rectangular inlet and product slice thickness of 20 mm for drag force, respectively. The models for predicting the responses were adequate, with r-square values 0.9463 and 0.9376 and desirabilities of 99.2 and 95.0% for air flow rate and drag force respectively. The experiment was repeated using the optimal conditions to validate the optimum responses. The variation between the predicted and experimental data was less than 8%.
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