首页> 外文期刊>International Journal of Heat and Mass Transfer >MODELLING OF AN DELECTRIC IR HEATER AT TRANSIENT AND STEADY STATE CONDITIONS PART II: MODELLING A PAPER DRYER
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MODELLING OF AN DELECTRIC IR HEATER AT TRANSIENT AND STEADY STATE CONDITIONS PART II: MODELLING A PAPER DRYER

机译:瞬态和稳态条件下的红外辐射加热器的建模第二部分:造纸干燥机的建模

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摘要

A model for an electric infrared (IR) pare dryer has been developed. The model includes non-grey radiative heat transfer between the different parts of he IR heater, as well as conduction in reflector material and convective cooling of surfaces. Such heat transfer calculations are combined with energy balances to provide a system of equations that simulates the behaviour of an electric IR dryer. Using IR module voltage as the only input, the model predicts the temperature of dryer components and cooling air, as well as the net radiation heat transfer to the paper sheet at steady state and transient conditions. The model has been used to investigate trends in efficiency and component temperature with changing voltage and paper grade. Emphasis has been on back reflector temperature and dryer efficiency. Also, the transients during start-up of an IR paper dryer have been investigated. The study indicates that the transients of he back reflector is important for the time needed to reach steady state heat flux at the paper sheet.
机译:已经开发出一种用于电动红外(IR)干燥机的模型。该模型包括红外加热器不同部分之间的非灰色辐射传热,以及反射器材料中的传导和表面的对流冷却。这种传热计算与能量平衡相结合,提供了一个方程式系统,可以模拟电红外干燥器的行为。该模型使用IR模块电压作为唯一输入,可以预测干燥器组件和冷却空气的温度,以及在稳态和瞬态条件下向纸张传递的净辐射热。该模型已用于调查效率和组件温度随电压和纸张等级变化的趋势。重点放在后反射器的温度和干燥机效率上。同样,已经研究了IR纸张干燥机启动期间的瞬变。研究表明,后反射器的瞬变对于在纸张上达到稳态热通量所需的时间很重要。

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