隨著資訊科技日益普及,工業電腦應用與人類生活密不可分。工業電腦在不同的用途中,就會有不同的設計考量,例如電腦機台需要防水、防塵、低噪音,就必須考慮無散熱孔設計,取消風扇。為了散熱的需求,鋁擠型鰭片便常應用於工業電腦的外觀。目標即是在設計時,兼顧造型美感與散熱績效。本研究使用田口法進行實驗設計,並配合熱流軟體Flotherm模擬,在有諸多影響因子的情況下,以最少的實驗次數,找到最佳績效的設計方案。研究結果如下:散熱鰭片配置於電腦外觀,以型態為A型(上方型),搭配鰭片基座為8mm、鰭片厚度為1.5mm、鰭片高度為5mm,鰭片間距為5mm為最佳之設計方案。各因子對於電腦散熱績效的影響比重中,以「型態」占53.678%最高;其次依序為「鰭片厚度」占20.392%,「鰭片間距」占15.154%,「鰭片基座占」9.141%,「鰭片高度」占1.631%。研究中發現,散熱鰭片配置於電腦上方的散熱效果最好也最穩定,與傳統「鰭片面積越大,散熱效能越好」的認知不同。也就是說,散熱鰭片的有效配置,比鰭片數量的多寡,更有助於散熱。
With information technology progression, there are more and more industrial computer applications have been employed in people day life. Industrial computers are always designed to fit the distinct criteria for various applications. For example, a computer system must be vents-free and cooling-fans-free for the functions of water-proofing, dust-proofing or low noise-less. Therefore, the computer housing is usually made from the aluminum-extruded heat sink for heat dissipation. In this study, the software of Flotherm was used to simulate the heat transfer characteristic of the aluminum-extruded heat sink which was placed on the computer housing. For exploring the heat dissipation performance, the experiment plan has been developed by Taguchi’s method to figure out the best solution. The result shows that A-type (the sink was placed on the top of the computer housing) with the 8mm basement, 1.5mm fin thickness, 5mm fin height, and 5mm interval is the factor parameter combination that has the best heat dissipation performance. It also reveals the “placement type of sink” contributes the highest proportion impact, 53.678%, of the heat dissipation factors, and the following are the "thickness" with 20.392%, the "interval" with 15.154%, the "basement" with 9.141% and the "height" with 1.631%. That means an adapted placement of heat sink is much more effective in obtaining good performance than using a larger size sink.