以濕式塗烤技術製備工業熱輻射吸收膜

工業熱輻射源強度可達1~20 kW/m^2，大於太陽在正中午時的最大強度1kW/m^2。而且許多工業製程為全天候運轉、不受天氣影響，可以回收的輻射熱量效益大。本研究提出以濕式塗烤技術製備工業熱輻射吸收膜，主要吸收範圍為工業熱輻射波段，製程中以基材表面處理搭配濕式塗烤程序來進行製備，同時吸收膜耐溫程度可達500℃。研究中選用可耐高溫之塗料分別噴塗於已噴砂之鋁合金與不銹鋼SUS304 基材，塗佈後需以高溫烘烤增加附著力。以不銹鋼為基材之高溫熱輻射吸收膜為例，初始吸收率為0.916，經500℃、6,700小時耐溫測試後，吸收率維持在0.829，下降幅度9.5 %，衰退趨勢已達平緩且外觀亦無變形。工業熱輻射吸收膜可用於吸收產線上高溫物件的輻射熱，未來可結合發電元件來轉換成電能，提升廢熱回收率達到廢熱回收節能減碳之效。

關鍵字

工業熱輻射；吸收膜；濕式噴塗

並列摘要

In some of industrial process, the thermal radiation intensity reached 2 to 20 kW/m^2 which were depended on distance and temperature of heat source. Therefore, the thermal radiation intensity is larger than solar thermal intensity as well as few times at most cases. This study presents a wet coating process which is prepared for the radiation absorbing film. The main absorption wave length is in the range of industrial thermal radiation as well as infrared. The surface of substrate is processed with wet coating and baking process and the absorbing film can be operated in high temperature up to 500℃. Furthermore, high temperature resistant paint was sprayed on the aluminum alloy and stainless steel substrate (SUS304), and needed a process of high temperature baking for enhancement film adhesion. In the case of stainless steel substrate, the initial absorptance was 0.916 and the absorptance became to 0.829 after 500℃ and 6,700hr resistant test. The decline rate was 9.5% and the decline trend became to stable. The absorption film is available for recovery of industrial thermal radiation and can be converted into electricity if combined power generation device.

並列關鍵字

Industrial thermal radiation ； Absorbing film ； Wet spraying

國際替代計量

以濕式塗烤技術製備工業熱輻射吸收膜

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