English  |  正體中文  |  简体中文  |  Items with full text/Total items : 74010/74010 (100%)
Visitors : 24680547      Online Users : 230
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version

    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/71532

    Title: 利用三水合醋酸鈉固液態相變增進散熱能力之被動冷卻系統研究
    Authors: 黃皓瑄;Huang,Hao-Hsuan
    Contributors: 光電科學與工程學系
    Keywords: 三水合醋酸鈉;相變;被動式散熱;sodium acetate trihydrate;phase change;passive cooling
    Date: 2016-06-29
    Issue Date: 2016-10-13 13:14:51 (UTC+8)
    Publisher: 國立中央大學
    Abstract: 為解決高功率LED晶片接面溫度過高的問題,本論文使用固態的三水合醋酸鈉相變材料相變時大量吸收潛熱的特性,延長高功率LED能夠使用的時間。本論文使用十水合碳酸鈉作為成核劑,證實能夠有效抑制三水合醋酸鈉嚴重過冷的問題。此外本論文基於總體熱含量法的概念建立了一套快速設計的方法,藉由數學式快速計算出相變式冷卻系統的有效使用時間以及設計上需要的系統參數。此外本論文中提出相變式散熱膠囊的概念,使相變式冷卻的方法能夠被更廣泛的應用。;The junction temperature of high power LED is an essential issue for practical applications. In this work, the high latent heat of NaCH3COO·3H2O (Sodium Acetate Trihydrate, SAT) is proposed and utilized to prolong the practical using time of a high power LED. With the addition of NaCO3·10H2O as the nucleation agent, supercool phenomena of SAT can be effective suppressed. A quick design algorithm based on lumped heat capacity method to evaluate the working time and system parameters of a cooling system using PCM (phase change material) is derived and proposed with detail mathematical formulation. In addition, a PCM capsule concept is proposed to provide a flexible extension of the usage of PCM cooling.
    Appears in Collections:[光電科學研究所] 博碩士論文

    Files in This Item:

    File Description SizeFormat

    All items in NCUIR are protected by copyright, with all rights reserved.

    社群 sharing

    ::: Copyright National Central University. | 國立中央大學圖書館版權所有 | 收藏本站 | 設為首頁 | 最佳瀏覽畫面: 1024*768 | 建站日期:8-24-2009 :::
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - 隱私權政策聲明