利用遠紅外線鋯粉提升熱交換性能研究

Research of Heat Exchange Performance Enhancement by Using Far Infrared Zirconium Powder

洪孟賢(Meng-Hsien Hung)

指導教授 ： 李文興

共同指導教授 ： 卓清松

國立臺北科技大學/機電學院/能源與冷凍空調工程系碩士班/碩士(2014年)

摘要

本研究之目的為藉由遠紅外線鋯粉與中孔碳材料致使熱交換效益提升，且採用噴塗之方式噴塗於熱交換器外殼，以非破壞性的加裝方式達到節能與工程實際應用的可行性。實驗中為藉由遠紅外鋯粉熱交換效益分析，在相同的入水水溫、流速與熱交換面積下進行熱交換效益增進的探討，為熱交換器覆上保溫後，阻絕其熱傳導與熱對流後進行熱交換效益實驗，以探討遠紅外線鋯粉與中孔碳是否具有將熱能吸收後轉換為遠紅外線之能力，而後再進行遠紅外線鋯粉吸收/放射驗證實驗，遠紅外線鋯粉與中孔碳在吸收遠紅外線後轉為熱能之效益。實驗結果顯示，使用遠紅外線鋯粉應用於散熱效益分析上在遠紅外線鋯粉之重量百分濃度為為7.5%時，在尚未包上保溫的情況下與上漆銅管比較其能增進21.51%~31.84%的熱交換效益提升；當包上保溫後，還是能達到11.87~17.88%的熱交換效益提升；當與裸銅管相較時，也能保有18.98~26.42%之熱交換效益提升。中孔碳應用於散熱效益分析上在中孔碳之重量百分濃度為為5%時，在尚未包上保溫的情況下與上漆銅管比較其能增進12.89~13.34%的熱交換效益提升；當包上保溫後，則達到2.25~2.56%的熱交換效益提升；當與裸銅管相較時，保有.97~10.55%之熱交換效益提升。

關鍵字

遠紅外線材料 ； 二氧化鋯 ； 熱交換器

並列摘要

The purpose of this study is to examine the viability of the two materials, far infrared zirconium powder and mesoporous carbon, for improved heat exchange efficiency in a nondestructive installation method, i.e. spray-applied coating of these materials on heat exchanger casings for energy saving and engineering application. Experiments were conducted to investigate the effect of far infrared zirconium powder on heat exchange efficiency in the same conditions of water-entry temperature, flow velocity and surface area for heat exchange. Heat exchangers were covered with insulation to block heat transfer and thermal convection before undergoing an experiment for heat exchange efficiency, which was designed to examine whether far infrared zirconium powder and mesoporous carbon have the ability to absorb thermal energy and convert it to far infrared rays. Then, an experiment for verifying the absorption and emission ability of far infrared zirconium powder was conducted to determine how efficient far infrared zirconium powder and mesoporous carbon are in absorbing far infrared rays and converting them into thermal energy. Experiment results show that in the analysis for heat dissipation efficiency, the use of 7.5 wt% far infrared zirconium powder can increase heat exchange efficiency by 21.51-31.84% on uninsulated copper tubes andstill by 11.87-17.88% on insulated ones relative to their lacquered counterparts and maintain an increase of 18.98-26.42% in the same efficiency relative to bare copper tubes, whereas the use of 5 wt% mesoporous carbon can increase heat exchange
efficiency by 12.89-13.34% on uninsulated copper tubes and by 2.25-2.56% on insulated ones relative to their lacquered counterparts and maintain an increase of 5.97-10.55% in the same efficiency relative to bare copper tubes.

並列關鍵字

Far Infrared ； Zirconium dioxide ； Heat exchanger

參考文獻

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