迴路式熱管動態特性研究

本研究旨在探討迴路熱管(LHP)的動態行為，利用系統識別的方法，求出迴路熱管的動態模型，包括迴路熱管的啟動行為，並討論不同加熱量與不同操作角度對迴路熱管啟動現象的影響。研究如何利用短時間的暫態測試來預測迴路熱管的穩態性能，以用於品管快速檢驗上。本研究的重點為 : (1) 迴路熱管的動態系統為可變結構系統，由不同的加熱量與不同的操作姿態，LHP會呈現穩定系統、不穩定系統與振盪系統等不同的系統結構。(2) 由LHP啟動現象的觀察，在啟動瓦數為50瓦到120瓦之間，屬於成弗珧坁漸[熱範圍，此範圍內溫度與加熱量變化屬線性系統。(3) 透過標準測試方法建立，可以由短時間內的暫態測試來預測迴路熱管的穩態性態，預測時間最短可達到原本溫度上升至穩定時間的二十分之一，提升品管效率。

關鍵字

動態；啟動；迴路熱管

並列摘要

The main purpose of the research presented is to study the dynamic behavior of loop heat pipe (LHP). We can use the method of system identify to find out the dynamic model of LHP, including the Start-up behavior as an important part of dynamic behavior and to study the influence of the start-up behavior due to different heat load and operating angle on LHP. Besides, discuss how to utilize the transient behavior test in short time to forecast the steady-state performance of LHP, and to create a method of rapid quality control test. There are two main points in the research : (1) The dynamic structure system of LHP is variable due to different heat load and operation angle. (2) It is the successful start-up range of LHP when heat load is between 50W and 120W. And the relationship between temperature and heat load is linear during this successful start-up range. (3) By the transient behavior test in short time , it only costs 0.05 times of the original test time to forecast the steady –state performance of LHP.

並列關鍵字

Start-up ； loop heat pipe ； dynamic

參考文獻

[17] 黃秉鈞，”系統識別”, 2003

[2] I. Muraoka et al, “Analysis of the Operational Characteristics and Limits of a Loop Heat Pipe with Porous Element in the Condenser”, Instituto Nacional de Pesquisas Espaciais, International Journal of Heat and Mass Transfer, pp.2287-2297, 2000

[4] Jentung Ku, “Operation Characteristics of Loop Heat Pipes”, NASA Goddard Space Flight Center, SAE Technical Paper 1999-01-2007, 1999

[7] Paul J. Wirsch and Scott K. Thomas, “Performance Characteristics of a Stainless Steel/Ammonia Loop Heat Pipe”, Wright State University, Journal of Thermophysics and Heat Transfer, Vol. 10, No. 2, April-June 1996

[8] T. Kaya and T. T. Hoang “Mathematical Modeling of Loop Heat Pipes and Experimental Validation” , NASA Goddard Space Flight Center, Journal of Thermalphysics and Heat Transfer Vol. 13, pp.314-310 , 1999

國際替代計量

迴路式熱管動態特性研究

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