燃氣熱水器循環系統管路防蝕技術研究

RESERCH OF GAS WATER HEATER CYCLING SYSTEM WITH PIPING ANTI-CORROSION TECHNOLOGY

彭文正(Wen-Cheng Peng)

指導教授 ： 蘇艾

元智大學/工程學院/機械工程學系/碩士(2012年)

摘要

摘 要

本研究是以實驗的方法探討燃氣熱水器循環系統管路，針對純水、自來水、地下水三種水質做為腐蝕之觀察、矩形盒內所展現的流場型態、溶液溫度及濃度的變化情形均是研究的對象。
實驗內容為利用浸泡實驗及電化學方法加速腐蝕的速率，再以純水、自來水、地下水三種水質做為腐蝕之觀察。流場實驗矩形盒，以銅管及壓克力板構成，對於盒內流場現象以採用雷射光暗影法來觀察流場，並且以相機拍照記錄，以便瞭解流場結構，對流場的溫度及濃度和質傳遞率作量測分析。
實驗結果顯示，浸泡實驗以純水浸泡產生之表面腐蝕，較為均勻，自來水其次，而地下水較其他為差，表面有比較多之不規則且大面積的腐蝕。而流場實驗由於流場濃度分佈及流動的形態，銅管內產生均勻性之腐蝕現象。

關鍵字

燃氣熱水器 ； 防蝕管路 ； 流場 ； 電化學

並列摘要

Abstract

This study is based on the experimental method to investigate the gas water heater cycling piping system, for pure water, tap water, groundwater observation of three kinds of corrosion, rectangular box to show the flow patterns in the variations of the solution temperature and concentration are the object of study.
In this experiment, the accelerated corrosion rate of laboratory immersion corrosion test of metal and electrochemical methods, three kinds of water quality to pure water, tap water, groundwater as a corrosion observed. Flow field experiments rectangular boxes, copper tube and acrylic sheet components, In order to visualize the flow, the shadowgraph technique is used. In order to understand the structure of the flow field and flow field of temperature and concentration measurement analysis and mass transfer rates.
The experimental results show that the laboratory immersion corrosion test of metal in pure water to soak the surface corrosion is more uniform, followed by tap water, groundwater was worse than the other, the surface is more irregular and large areas of corrosion. The flow field experiments by the concentration distribution and flow situation of the flow field, brass to produce uniformity of corrosion.

並列關鍵字

Gas Water Heater ； Anti-corrosion ； Flow Field ； Electrochemical

參考文獻

【11】 行政院環境保護署，民國99年環境水質監測年報。

【1】 H. Klein and J. Rice,Trans. Amer. Soc. Mech. Eng. Ser. A. 88, 232(1966)。

【2】 Private Communication, H. Jordan, Amer. Water Works. Assoc。

【5】 孫文益“台北自來事業處陽明挾區自來水管腐蝕型態分析”中原大學機械工程碩士論文，中華民國94年7月。

【7】 G. Carter, Metal progr., 93, 117(1968)。