填充床目前廣為應用在不同的工業領域，在化學反應、熱儲存及蓄熱式熱交換等扮演重要的腳色。蓄熱體填充床具備高熱傳面積、化學安定性、高溫耐受性佳等特性，其中蓄熱式加熱爐應用蓄熱式熱交換器進行廢熱回收，預熱空氣，減少熱能之浪費，而蓄熱體高溫耐受性可以使熱交換器設置於加熱爐高溫的區域直接進行熱回收，減少廢氣混和均勻化的熱損耗。為了達到精準控制加熱爐的爐溫，蓄熱體的熱效率是主要影響因素。
本文分別建立三維蓄熱體穩態模型、二維蓄熱體暫態模型、一維計算來探討蓄熱體作為熱回收系統之性能分析。由於填充床是由數十層蓄熱球體堆疊而成，因數值模擬限制，故將模型簡化以穩態及較少的堆疊層數之三維模型模擬蓄熱體填充床之熱液動性質，討論不同進口流速下之熱對流係數及壓降，最後由數值結果做回歸分析得到紐賽數及摩擦因子對雷諾數之關係式。並以二維蓄熱體模型進行暫態分析，模擬單元流道暫態之熱流場，且探討冷熱流體週期性交替時間對蓄熱體熱效率之影響，其結果顯示交替時間較短會有較佳的蓄熱體熱效率。最後為了提高計算效率，利用Fortran撰寫一維暫態蓄熱體計算程式，可快速得到蓄熱體熱交換器進入週期性穩態後之熱效率，且探討各加熱爐區的蓄熱體熱效率及廢氣回收率對熱效率之影響，計算結果得到各區熱效率都達到90 %以上。

The packed beds are widely applied for different industry and technology, such as heat exchangers, heat recover, thermal energy storages and chemical reactors. This paper is going to research about ceramic fixed bed heat regenerator in regenerative furnaces which are common to be used to reduce waste heat. The kind of furnace can both reduce the fuel and provide high temperature air importance part of high temperature air combustion burning system. This paper created three models, three-dimensional steady sphere type hydrothermal dynamic model, two-dimensional unsteady cylinder type hydrothermal dynamic model, and one-dimension calculation program. Because of the full model of packed bed is too huge to simulate, here set few rows to get the steady hydraulic performance (pressure drop, heat coefficient). In addition to steady model, the two-dimensional unsteady simulation model has been established. The 2-D model can get dynamic temperature profiles of gases and heat-storing cell-tunnel in fixed bed. This paper compared effect of different switching time to the thermal effectiveness, and got the conclusion that the shorter switching time, the better effectiveness. Finally, the effectiveness of packed bed at every regions of furnace was calculated by 1-D calculation program and showed that each side of packed bed was over 95% with normal operating condition.

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