| Summary: | 碩士 === 國立屏東科技大學 === 機械工程研究所 === 83 ===
This thesis proposes here a simple method based on the concept of inverse heat conduction problem to replace the complex and expensive optical measurement system for estimating the total thermal radiative emissivity diffused from the far-infrared heating surface. The parameter estimation method of the conjugate gradient optimization was employed to inversely predict the total emissivity of the far-infrared heating surface through the measured temperature points in the heated body. The systematic parameters appearing in mathematical heat conduction formulation for the heated body include the thermal conductivity, thermal capacity per unit volume, total absorptivity, total emissivity of the heated body and total emissivity of the far-infrared heating surface. However, the present studies are focused onthe exploration of estimating the total emissivity of the heating surface and improving the accuracy of predicted results. The theoretical studies indicate that only a single measured temperature point is sufficiently required for fast and robustly predicting the thermal radiative emissivity, that the wide ranges of initial-guesses can be easily set, and that the higher temperature of the far-infrared heating surface and the longer measured time can lead to obtain the higher accuracy of predicted values.
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