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首页> 外文会议>2011 International Conference on Computer Distributed Control and Intelligent Environmental Monitoring >The Analysis of Affect Factors in Correct Coefficient of Surface Convective Heat Transfer Coefficient during Film Drying Process
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The Analysis of Affect Factors in Correct Coefficient of Surface Convective Heat Transfer Coefficient during Film Drying Process

机译：膜干燥过程中表面对流传热系数正确系数的影响因素分析

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In the process of impinging dryness, surface convective heat transfer coefficient is one of the most important parameters of effecting dryness effectiveness. It is usually confirmed by testing, this paper, for film drying craftwork under impingement jet, gives the computational method of surface convective heat transfer coefficient, and analyses the effect of the three factors, which are the difference in temperature between drying medium and the surface of damp material, latent heat of solvent vaporization and pressure of drying medium, on the coefficient of correction of surface convective heat transfer coefficient by the graph. The conclusion is solvent vaporization is leading factor, if ignore its effect, the maximum error can be 20%. But when solvent is water, each factor¡¯s effect on coefficient of correction is less than 2%, so we can ignore the effect of coefficient of correction. At last for special dryness processing of pressure sensitive adhesive tap, relative error between calculated value and known theoretical value is5.08% by making use of the given computational method of the surface convective heat transfer coefficient, after amending it, the relative error could reduce to be3.57%. The research result can improve energy efficiency.
机译：在影响干燥的过程中，表面对流换热系数是影响干燥效果的最重要参数之一。通常通过试验证实，本文针对冲击射流下的薄膜干燥工艺，给出了表面对流传热系数的计算方法，并分析了干燥介质与表面温度差这三个因素的影响。图中，湿物料，溶剂汽化潜热和干燥介质压力对表面对流传热系数的修正系数的影响。结论是溶剂汽化是主要因素，如果忽略其影响，最大误差可为20％。但是当溶剂是水时，每个因素对校正系数的影响都小于2％，因此我们可以忽略校正系数的影响。最后对压敏胶水龙头进行特殊干燥处理，利用给定的表面对流换热系数计算方法，计算值与已知理论值之间的相对误差为5.08％，对其进行修正后，可以减小相对误差。为3.57％。研究结果可以提高能源效率。

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