本文研究有關不同加熱方式對傾斜式焙炒爐溫度場的影響，內容分為實驗與數值分析兩部分。實驗方面，量測出芝麻熱傳導係數，以最小二乘方法推導出關係式，推導出溫度在20-60℃，含水率在6％-17.5％的範圍內，熱傳導係數相對於溫度、含水率的公式，並用所測得的K值當作是軟體模擬的常數。數值分析方面，使用ANSYS有限元素分析軟體，在總熱流率相同時，發現兩段式中心加熱焙炒爐比兩段式底部加熱焙炒爐的出口溫度高出48％，若要將兩段式底部加熱焙炒爐的出口溫度提升至與兩段式中心加熱焙炒爐的溫度相同（200℃），則需增加93％的燃料。當分成三段來加熱時，中心加熱爐床溫度比底部加熱爐床溫度高出49℃。由此得知不管是兩段或三段加熱，中心加熱之熱傳效果優於底部加熱者。 The main purpose of this paper is to compare the temperature distribution between axial-heating furnace and bottom-heating furnace. We investigate the affections of different heating method to the temperature field of an inclined furnace. The content is divided into two parts: experiment and numerical analysis. As to experiment, we measure the sesame thermal conductivity and use the least square method to deduce that when the temperature range is 20℃ to 60℃ and the moisture rate range is 6% to 17.5%, the results are as the following: K 1.0654M 9.47 10 /sup 4/ T 0.0230 where K: Thermal Conductivity, W/m-℃;M: Moisture rate, %; T: Temperature. ℃.We take K value as the constant in the simulation. For numerical analysis, we use finite element analysis software-ANSYS to analyse the numerical analysis. When in the same total heat flow rate, the temperature of two-section-axial-heating furnace is higher than the one of two-section-bottom-heating furnace for 48%. If we want to make the two furnaces in the same temperature, we need to increase fuel for 93%. When the furnace is heated in 3 sections, the temperature of axial-heating exposed bed will be higher than the one of bottom-heating exposed bed for 49℃. Therefore, we can conclude that the heat transfer effect of axial-heating method (weather two-section or three-section) is more effective than bottom-heating method.
