複合式冷板之流道設計與熱傳分析

Channel Design and Heat Transfer Analysis for Complex Cold Plate

李界儀(chieh-yi-Li)

指導教授 ： 蘇程裕

國立臺北科技大學/機電學院/製造科技研究所/碩士(2010年)

摘要

冷板為液冷式散熱系統中ㄧ關鍵元件，其直接接觸處理器晶片，因此熱傳效能及密封性要求極高。而冷板在開發製作上，長久以來一直受到加工技術的限制，始終無法有效提升產品的性能及可靠度。
本研究主要在探討冷板內部流道設計與封合製作。研究中將不同幾何造型之鰭片搭配組合，設計出「銅柱型」、「摺疊鰭片型」與「銅球型」三種流道型式後，使用模擬分析軟體ICEPAK進行熱傳及流場分析比較。實際製作時，利用固態擴散接合製程特性，將冷板上、下金屬板材以及內部流道鰭片做一次性接合。
研究結果顯示，接合面形成橫跨二母材的新晶粒且無明顯晶界，已達緊密封合效果。經由冷板測試結果得知，銅柱型流道熱傳效果最好，其次為銅球型流道，而摺疊鰭片型流道效果最差。在冷板內部流場壓降測試結果顯示，銅球型流道壓降最小，其次為摺疊鰭片型，而銅柱型流道內部壓降最大。

關鍵字

液冷式散熱 ； 冷板 ； 流道

並列摘要

Cold plate is a key component of the liquid cooling system. Because cold plate contacts processing chip, its heat transfer and sealing ability is highly required. During the development of cold plate, its machining techniques have been limited so the performance and reliability of the product can not been improved.
This research mainly focused on cold plate’s inner channel design and sealing process. In this research there are three different combinations of fins’ shapes that would be used to design three channels. The three channels are Copper Pillar, Folding Fin and Copper Ball. The comparison of heat transfer and flow analysis among these three channels was conducted by simulation software ICEPAK. During the manufacturing process of cold plate, its upper, lower metal pieces and inner channel fins can be assembled by using the characteristics of its solid diffusion bonding.
The research result showed that the bonding surfaces form the new grain that through the base metal and there is no obvious grain boundary and it reached very tight bonding results. The performance testing showed that Copper Pillar inner channel had the best heat transfer ability .The secondary is Copper Ball inner channel. However, the Folding Fin channel is the last one. From the cold plate pressure drop tests, pressure drop of Copper Pillar inner channel is the fewest, next is Copper Ball inner channel, and the last is Folding Fin channel.

並列關鍵字

Liquid Cooling ； Cold Plate ； Channel

參考文獻

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