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Student Number 943204056
Author Jung-sheng Kuo(郭榮陞)
Author's Email Address s901716@mail.yzu.edu.tw
Statistics This thesis had been viewed 1426 times. Download 10 times.
Department Chemical and Materials Engineering
Year 2006
Semester 2
Degree Master
Type of Document Master's Thesis
Language zh-TW.Big5 Chinese
Title Improvement and development of medical oxygen concentrator
Date of Defense 2007-07-06
Page Count 95
Keyword
  • air
  • concentrators
  • oxygen
  • OXYSIV-
  • patient
  • Abstract Oxygen concentrators are electrically powered devices which are designed to provide oxygen for patient who require long-term oxygen supply at home. The machine has been available for the last 10 to 15 years. It produces high oxygen concentration by pressure swing adsorption (PSA) process. The process uses variation of pressure as the main operating parameter to achieve separation and is becoming increasingly popular for the production of oxygen from air.
    This study uses a two-bed six-step process. Simulation is performed for the bulk separation of N2/O2/Ar(78.3/20.762/0.938 vol %) feed. The process utilizes OXYSIV-5XP as adsorbent. This study uses the equilibrium model and the pressure drop can be neglected. We assumed instantaneous equilibrium between the solid and gas phase with non-isothermal operation.
    The 20.762%O2 in the feed can be concentrated to 92%O2 in the product with a recovery of 31%. The effects of operating variables such as bed length, adsorption pressure, surrounding temperature, and steps time are investigated on the performance of this study. In addition we aim at small-scale concentrator and seek for to optimal operation.
    Table of Content 目錄Ⅰ
    表目錄Ⅳ
    圖目錄V
    第一章 緒論1
    第二章 簡介及文獻回顧2
    2.1變壓吸附之簡介2
    2.1.1變壓吸附基本原理2
    2.1.2吸附劑及其選擇性4
    2.1.3變壓吸附典型步驟5
    2.2文獻回顧7
    2.2.1 PSA程序之發展與改進7
    2.2.2理論之回顧10
    2.2.3 PSA製程在氧氣濃縮機的應用12
    第三章 理論13
    3.1基本假設14
    3.2統制方程式15
    3.3吸附平衡關係式19
    3.4參數推導26
    3.4.1軸向擴散係數26
    3.4.2管壁的熱傳係數27
    3.5起始條件與邊界條件28
    3.6求解的方法29
    3.6.1閥公式29
    3.6.2求解步驟30
    第四章 製程描述32
    4.1程式驗證33
    4.2.1四塔八步驟製程35
    4.2.2三塔六步驟製程37
    4.3雙塔六步驟之常數與操作條件39
    第五章 結果討論與數據分析41
    5.1標準雙塔大型機六步驟程序之模擬41
    5.1.1 Step1&4對六步驟製程的影響41
    5.1.2 Step2&5對六步驟製程的影響43
    5.1.3 Step3&6對六步驟製程的影響45
    5.1.4進料壓力對六步驟製程的影響47
    5.1.5塔長對六步驟製程的影響47
    5.1.6 Tank體積對六步驟製程的影響50
    5.1.7環境溫度對六步驟製程的影響50
    5.2模擬結果與驗證54
    5.3四塔大型機八步驟程序之模擬61
    5.3.1步驟時間對八步驟製程的影響61
    5.4雙塔小型機六步驟程序之模擬66
    5.4.1步驟時間對六步驟製程的影響66
    5.5四塔小型機八步驟程序之模擬72
    5.5.1步驟時間對八步驟製程的影響72
    5.6三塔小型機六步驟程序之模擬77
    5.6.1步驟時間對六步驟製程的影響77
    5.7結論82
    符號說明86
    參考文獻88
    附錄A流速之估算方法92
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    Advisor
  • Cheng-Tung Chou(周正堂)
  • Files
  • 943204056.pdf
  • disapprove authorization
    Date of Submission 2007-07-18

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