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姓名 張奇?(Chi-Che Chang)  查詢紙本館藏   畢業系所 能源工程研究所
論文名稱 超臨界R-410A與R-32熱傳及壓降性能之研究
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摘要(中) 本文以實驗的方式研究R-410A與R-32,在圓管6.5mm中穿越超臨界區域的加熱熱傳及壓降特性。R-410A壓力分別為5.0 MPa與5.5 MPa,溫度從59oC-87oC。R-32壓力分別為5.8 MPa與6.5 MPa,溫度從65oC-87oC。流量分別為200 kg/m2s、400 kg/m2s、600 kg/m2s與800 kg/m2s。
在不同的擬臨界壓力下,擬臨界壓力越高,整體壓降會降低,但熱傳也降低,擬臨界壓力越低,整體壓降升高,熱傳也會升高。在R-410A與R-32不同流體的壓降與熱傳係數比較,R-410A與R-32的壓降相差很小,但熱傳係數方面,R-32的最高熱傳係數與R-410A的最高熱傳係數相差2000 W/m2-K。
摘要(英) In this paper, the heat transfer and pressure drop characteristics of R-410A and R-32 in the supercritical region of 6.5mm in the tube are studied experimentally. R-410A pressure was 5.0 MPa and 5.5 MPa, the temperature from 59oC-87oC. R-32 pressure was 5.8 MPa and 6.5 MPa, the temperature from 65oC-87oC. Flow rates were 200 kg / m2s, 400 kg / m2s, 600 kg / m2s and 800 kg / m2s, respectively.
At different pseudo - critical pressures, the higher the pseudo - critical pressure, the lower the overall pressure drop, but also reduce the heat transfer, the lower the pseudo - critical pressure, the overall pressure drop, heat transfer will increase. R-410A and R-32 different fluid pressure drop and heat transfer coefficient comparison, R-410A and R-32 pressure drop difference is very small, but the heat transfer coefficient, R-32 maximum heat transfer coefficient and the R- 410A of the maximum heat transfer coefficient difference of 2000 W / m2-K.
關鍵字(中) ★ 超臨界
★ R-410A
★ R-32
★ 熱傳
★ 壓降
關鍵字(英) ★ Supercritical
★ R-410A
★ R-32
★ Heat Transfer
★ Pressure Drop
論文目次 目錄
摘要 I
致謝 II
表目錄 V
圖目錄 VI
符號說明 IX
第一章 前言 1
第二章 文獻回顧 7
第三章 實驗方法 21
3.1簡介 21
3.2實驗系統 24
3.2.1測試段 26
3.2.2冷媒循環系統 27
3.2.3水循環系統 27
3.3實驗設備 27
3.3.1溫度量測 27
3.3.2壓力量測 28
3.3.3差壓量測 28
3.3.4流量量測 28
3.3.5其他設備 29
3.4實驗步驟 30
3.5資料換算 31
3.5.1熱傳資料換算 31
3.5.2壓降資料換算 33
3.6 Modified Wilson Plot method 34
第四章、實驗結果 40
第五章 結論 66
參考文獻 67
附錄 72

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指導教授 楊建裕 審核日期 2017-1-20
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