博碩士論文 101353018 詳細資訊




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姓名 黃克倫(Ke-lun Huang)  查詢紙本館藏   畢業系所 機械工程學系在職專班
論文名稱 迴轉式壓縮機泵浦吐出口閥片厚度對性能影響之研究
(The Influence of the thickness of pump discharge valve on the performance of Rotary Compressor)
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摘要(中) 本研究利用R410A冷媒所對應的莫利爾曲線,求得壓縮機在不同工作參數下,所對應理論吸入、吐出之溫度與壓力,再由冷媒的熱力性質,求得腔室內每曲軸角度對應不同的體積下,造成腔室內的壓力變化。

再使用ANSYS軟體來模擬迴轉式壓縮機運轉過程閥片位移,利用閥片的材料機械性質(密度、楊式係數、蒲松比),和固定上支座各零件組合幾何,藉由改變閥片厚度參數,求得瞬時壓縮腔室吐出口閥片內外部之壓力所對應不同閥片位移量與壓縮機性能之影響。

模擬結果顯示,相同壓力下之0.305mm閥片位移量較0.25mm低4.1%,因位移減少,閥片閉合時,高壓端逆流減少,使得效率提升。經實驗驗證,性能測試結果0.305mm閥片提升EER能量效率比
(Energy Efficiency Ratio)1.8%;本研究藉由模擬可合理的解釋實驗結果。
摘要(英) Mollier chart of R410A refrigerant is used to obtain the corresponding theoretical suction temperatures, discharge temperatures, densities and pressures at different working
conditions. Then the corresponding volumes and pressures at different crank angles are calculated based on its thermodynamic properties.

ANSYS is used to simulate the valve displacement of the rotary compressor under different operation processes. Under the fix of valve material mechanical properties (density, Young′s modulus and Poisson′s ratio) and top flange parts, by changing the valve thickness only, the instantaneous valve displacement and the compressor performance caused by the difference between internal and external pressures of the compressor chamber.

Simulation shows that the displacement of 0.305mm valve is lower by 4.1% compared with that of 0.25mm valve under the same pressure loading. The experimental test verifies that 0.305mm valve increases the energy efficiency ratio EER (Energy Efficiency Ratio) by 1.8%. The simulated and experimental results are consistent each other.
關鍵字(中) ★ 迴轉式壓縮機
★ R410A冷媒
★ 吐出口閥片
關鍵字(英) ★ rotary compressor
★ R410A refrigerant
★ discharge valve
論文目次 致謝 I
摘要 II
Abstract III
目錄 IV
表目錄 VII
圖目錄 VIII
符號說明 X
第一章 緒論 1
1-1前言 1
1-2 文獻回顧 2
1-3研究目的與動機 5
第二章 理論基礎 6
2-1莫利爾曲線 6
2-2冷媒之熱力性質 7
2-3閥片瞬時動態模擬 11
2-3-1繪製幾何圖形 12
2-3-2定義材料 12
2-3-3網格 13
2-3-4夾持與負載 13
2-3-5分析 14
2-3-6結果 15
第三章 實驗設備與步驟 16
3-1實驗材料 16
3-1-1馬達組合 16
3-1-2泵浦組合 17
3-1-3外殼組合 18
3-2實驗設備 20
3-2-1卡路里機系統介紹 20
3-2-2卡路里機測試步驟 22
3-3實驗固定參數 24
第四章 結果與討論 25
4-1模擬腔內壓力變化對不同閥片厚度位移量之影響 27
4-2模擬腔內相同壓力下對不同閥片厚度位移量之影響 27
4-3不同閥片厚度對壓縮機性能測試容積效率之影響 29
4-4不同閥片厚度對壓縮機性能測試功率因數之影響 30
4-5不同閥片厚度對壓縮機性能測試冷房能力之影響 31
4-6不同閥片厚度對壓縮機性能測試消耗功率之影響 32
4-7不同閥片厚度對壓縮機性能測試能源效率比之影響 34
第五章 結論 36
5-1結論 36
5-2未來展望 37
參考文獻 38
附表 41
附圖 47
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指導教授 洪勵吾(Lih-wu Hourng) 審核日期 2014-7-18
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