熱管熱交換器之製造

Development of Heat Pipe Heat Exchanger

王承緯(Cheng-Wei Wang)

指導教授 ： 康尚文

淡江大學/工學院/機械與機電工程學系碩士班/碩士(2017年)

https://doi.org/10.6846/TKU.2017.00595

摘要

在現今能源短缺的危機中，能源如何節省與再利用是當前必須重視的課題，其中的廢熱排放是一大污染源之一。然而，在工業上使用的傳統熱交換器中，經常遭受廢氣排放的腐蝕與沉積物，造成熱回收效率降低和設備受損。熱管能有效率地將熱量從一端傳輸至另一端，並且無須外力驅動傳熱，而熱管熱交換器是熱管實際應用的方法之一，透過蒸發潛熱發揮長距離傳熱與小溫差的特性。
本研究提出氣對液熱管熱交換器之製造與測試，並探討熱管熱交換器的熱回收能力與熱性能表現。實驗裝置共裝設19支不鏽鋼-水熱管，規格為外徑6.2 mm、壁厚0.5 mm、長300 mm，於蒸發端流經入口溫度150-250 ºC與質量流率0.114-0.270 kg/min之熱氣體，冷凝端則流經恆定入口溫度30 ºC與質量流率0.940 kg/min之冷卻水，實驗結果顯示最大傳熱量為445.5 W，最大有效度為0.609。本文同時參考文獻中的理論相關性，進行實驗分析與理論研究探討。

關鍵字

熱管熱交換器 ； 熱管 ； 熱回收 ； 熱性能

並列摘要

In today's energy shortage crisis, how to save energy and reuse is a must pay attention subject, and waste heat emissions is one of the major sources of pollution. However, conventional heat exchangers used in industry often suffer corrosion and sediment from exhaust gases, leading to a reduction in heat recovery efficiency and equipment failure. Heat pipes can effectively transfer heat from one end to another, without additional force to drive heat transfer. Heat pipe heat exchanger is one of the practical applications of heat pipe, through the latent heat of vaporization to transfer heat over a long distance and small temperature difference characteristics.
In this study, the gas-to-liquid heat pipe heat exchanger was fabricated and tested, and the thermal recovery capability and thermal performance of heat pipe heat exchangers were investigated. The device consist 19 stainless steel-water heat pipes with an outside diameter of 6.2 mm, a wall thickness of 0.5 mm and a length of 300 mm. The experiment was conducted at conditions for which hot gas and cooling waters enter at temperatures of 150-250 ºC and 30 ºC, respectively. The flow rate of gas through the evaporator is at the range of 0.114-0.270 kg/min, while the flow rate of water through the condenser is 0.940 kg/min. The results showed that the maximum heat transfer rate was 445.5 W, and the maximum effectiveness was 0.609. The present research was also carried out the comparison between experimental and theoretical investigation with reference to the correlation in the literature.

並列關鍵字

Heat pipe heat exchanger ； Heat pipe ； Thermal recovery ； Thermal performance

參考文獻

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