Title

螺旋管熱交換器殼側熱傳特性研究

Translated Titles

The Shell-side Heat Transfer Characteristics Study for Helical Coil Heat Exchangers

Authors

黃偉哲

Key Words

螺旋管式熱交換器 ; 迪恩數 ; 威爾森繪圖法 ; 熱泵熱水器 ; 雷諾數 ; 對數平均溫差 ; Helical heat exchangers ; Dean Number ; Wilson-plot Method ; Heat Pump Water Heater ; Reynolds Number ; LMTD

PublicationName

臺北科技大學優質電力供電產業研發碩士專班學位論文

Volume or Term/Year and Month of Publication

2014年

Academic Degree Category

碩士

Advisor

施陽正

Content Language

繁體中文

Chinese Abstract

螺旋管熱交換器結構簡單、製作容易,其原理係利用螺旋曲率造成離心力作用產生二次流效應,增強其對流熱傳效果。目前廣泛應用於熱水熱交換器。其熱傳特性與螺旋圈徑、螺旋管圈節距、管圈數、曲率比等參數有關。文獻當中大多數為討論螺旋管熱交換器在固定高度下所變化的圈數、雷諾數(Reynolds Number)或螺旋管節距與不同的散熱面積下的螺旋管熱交換器之熱傳特性研究。在固定熱傳面積下,探討熱傳特性與上述相關參數的關係,則鮮少相關研究。因此,本文針對螺旋管熱交換器在固定熱傳面積下改變其螺旋圈徑、圈數、螺旋管節距與不同高度,進行其熱傳特性研究。在實驗過程中使用威爾森繪圖法計算殼側熱傳對流係數,經不準確定性分析計算其螺旋管熱交換器之誤差值δℎ표표在20.351 %以內。實驗結果顯示,螺旋管熱交換器之特傳特性與眾多參數相關,其中螺旋圈徑、曲率比、螺旋管節距等參數都將對螺旋管熱交換器之特傳特性具有重大之影響。例如增加其螺旋圈徑時,會導致離心力與壓降降低,使得熱傳特性降低。而增加曲率比、螺旋管圈節距時,會導致二次流效應的增強和增加螺旋管之散熱區域,使得熱傳熱傳性能較佳。

English Abstract

Helical-coil heat exchanger has many features on its applications, such as simple construction, easy manufacturing, and so on. Owing to its higher heat transfer performance than straight tube, caused by second-flow effect through curvature motion, helical-coil heat exchanger, recently, has been widely used in water heating purpose, like heat pump water heater. Many researches have been found to focus on the heat transfer performance related to coil number, Reynolds number, and coil pitch, under fixed coil height. There is rare study to investigate those relationships mentioned above under fixed heat transfer area. In the fixed heat transfer area to explore the relationship between the heat transfer characteristics associated with the above parameters, rarely related research.In additions, the over-all heat transfer performance will have been leaned to be dominated by the coil outside conditions since the main heat transfer resistance exists on shell-side. Therefore, this thesisis interested in focusing on the shell-side heat transfer performance study by experimental method under various coil diameters, coil numbers, coil pitches, and coil heights while restricting on the same heat transfer area. In the experiment, the Wilson-plot method was employed to estimate the shell-side heat transfer coefficient,oh. The uncertainty of the measured oh was also estimated around %351.20less than. The results show that the shell-side heat transfer coefficient,oh, is strongly related to coil diameter, coil pitch, coil curvature, and the Reynolds number.For example, its helical coil diameter increases, the centrifugal force will lead to lower pressure drop, making the heat transfer characteristics is reduced. Increased curvature than when Spiral pitch, will lead the region to enhance and increase the cooling coil of the secondary flow effects, so that the heat transfer performance of heat better.

Topic Category 機電學院 > 能源與冷凍空調工程系碩士班
工程學 > 市政與環境工程
工程學 > 電機工程
Reference
  1. PaisarnNaphon and SomchaiWongwises, “A Review of Flow and HeatTransfer Characteristics in Curved Tubes,”Renewable and Sustainable EnergyReviews, Vol. 10, No 5, 2006, pp. 463-490.
    連結:
  2. “Experimental and CFD Estimation of HeatTransfer in Helically Coiled Heat,”Chemical Englneering Research and Design, Vol. 1, No 2, 2007 ,pp.221-232.
    連結:
  3. 7. J.S. Jayakumar, S.M. Mahajani, J.C. Mandal,P.K. Vijayan, and RohidasBhoi ,“Thermal Hydraulic Characteristics of Air–Water Two-Phase Flows in Helical Pipes,” Chemical Engineering Research and Design, Vol. 2,
    連結:
  4. 9. J.T. Han ,T, C.X. Lin , M.A. Ebadian , “Condensation Heat Transfer An Pressure Drop Characteristicsof R-134a in An Annular Helical Pipe,”International Communications in Heat and Mass Transfer, Vol. 3, No 2 , 2005,pp.1307-1316.
    連結:
  5. 10. N. Jamshidi, M. Farhadi, D.D. Ganji, K. Sedighi“Experimental Analysis of Heat Transfer Enhancement in Shell andHelical Tube Heat Exchangers, ”Applied Thermal Engineering, Vol. 4, No. 2, 2013, pp. 664-652.
    連結:
  6. 11. Vimal Kumar, SupreetSaini, Manish Sharma, K.D.P. Nigam, “Pressure drop and Heat Transfer Study in Tube-in-Tube Helical Heat Exchanger,”Chemical Engineering Science, Vol. 2, No 1, 2006, pp. 231-252.
    連結:
  7. 12. Gregorg J. Zdaniuk, Louay M. Chamra, and Pedro J. Mago, “ExperimentalDetermination of Heat Transfer and Friction inHelically-finned Tubes,”Experimental Thermal and Fluid Science, Vol. 32, No 2, 2008, pp. 761-775.
    連結:
  8. 13. Lorenzo Santini, Andrea Cioncolini, Carlo Lombardi, and Marco Ricotti, “Two-phase Pressure Drops in A Helically Coiled Steam Generator,”International Journal of Heat and Mass Transfer”, Vol. 51, No. 4, 2008, pp. 4926-4939.
    連結:
  9. 14. Muhammad MahmoodAslamBhutta, Nasir Hayat, Muhammad Hassan
    連結:
  10. 15. Y. M. Ferng, W. C. Lin, and C. C. Chieng. “Numerically Investigated
    連結:
  11. Effects of Different Dean Number and Pitch Size on Flow and Heat Transfer Characteristics in a Helically Coil-Tube Heat Exchanger,”Applied ThermalEngineering, Vol. 36,No. 4, 2012, pp.378-385.
    連結:
  12. 16. Yuanyuan Zhou, Jianlin Yu, Xiaojuan Chen, “Thermodynamic OptimizationAnalysis of ATube-in-Tube Helically Coiled HeatExchanger forJouleThomsonRefrigerators,”International Journal of Thermal Sciences, Vol. 4, No. 3, 2012, pp.151-156.
    連結:
  13. 17. G. Yang, Z. F. Dong and M. A. Ebadiant,“Laminar Forced Convectioin AHelical Pipe with Finite Pitch,” International Communications in Heat and Mass Transfer,Vol. 2, No. 3, 1994, pp.853-862.
    連結:
  14. 19. Timothy J. Rennie, Vijaya G.S. Raghavan, “Experimental Studies of ADouble-Pipe HelicallyHeat Exchanger,”Experimental Thermal and Fluid Science ,Vol. 3, No. 1, 2005, pp.919-924.
    連結:
  15. 21. P.K. Sahoo ,Md.I.A. Ansari , A.K. Datta, “A Computer Based IterativeSolution for Accurate Estimation ofHeat Transfer Coefficients in
    連結:
  16. 23. Vimal Kumar, Supreet Saini, Manish Sharma, K.D.P. Nigam , “Pressure Drop and Heat Transfer Study in Tube-in-Tube Helical Heat Exchanger,“Chemical Engineering Science, Vol. 1, No. 3, 2005,pp. 124-130.
    連結:
  17. 24. Rahul Kharat, NitinBhardwaj, R.S. Jha, “Development of Heat TransferCoefficient Correlation for ConcentricHelical Coil Heat Exchanger,” Chemical Engineering Science, Vol. 2, No. 3, 2009, pp.2300-2308.
    連結:
  18. 26. Y.M. Ferng, W.C. Lin, and C.C. Chieng, “Numerically Investigated Effects ofDifferent Dean Number and Pitch SizeFlow and Heat Transfer Characteristics in AHelically Coil-Tube Heat Exchanger,”International Communications in Heat and Mass Transfer,Vol. 5, No. 2,2012, pp.378-385.
    連結:
  19. 27. V. Kumar, B. Faizee, M. Mridha, and K.D.P. Nigam, “Numerical studies of aTube inTube Helically Coiled Heat Exchanger,”Journal of Food Engineering,Vol. 2, No. 3, 2008, pp.2287-2295.
    連結:
  20. 28. Rob J. Moffat, “Describing the Uncertainties in Experimental Results,”Experimental Thermal and Fluid Science, Vol. 1, No. 2,1998, pp. 3-17
    連結:
  21. 29. Wen Yaoa, XiaoqianChena, WencaiLuoa, MichelvanTooren, JianGuo,“Review of uncertainty-based multidisciplinary design optimization methods for aerospace vehicles,”Progress in Aerospace Sciences, Vol. 2, No. 1, 2011, pp. 121-126.
    連結:
  22. 30. Ridha Ben Mansoura, Nicolas Galanisa, and Cong Tam Nguyen,“Effect of Uncertainties in Physical Properties on Forced Convection Heat Transfer with of Fluids,”Applied Thermal Engineering, Vol. 2, No. 1, 2006, pp. 54-60.
    連結:
  23. 31. Hugh W. Conlemam M. H Hosni Robert P. Taylor Glenn B. Brown,“Using Uncertainty Analysis in the Debugging and Qualification of A Turbulent Heat Transfer Test Facilly,”Elsevier Sicence Publishing, Vol. 2, No. 1, 1991, pp. 164-175.
    連結:
  24. 33. Jose’ Ferna’ndez-Seara, Francisco J. Uhı’a, Jaime Sieresa, AntonioCampo,“A General Review of The Wilson Plot Method and Its Modifications to Determine Convection Coefficients in Heat Exchange Devices,”Applied Thermal Engineering, Vol. 1, No. 2, 2006, pp. 111-119.
    連結:
  25. 36. N. Ghorbani, H. Taherian, M. Gorji, H. Mirgolbabaei, “Experimental Study of Mixed Convection Heat Transfer in Vertical HelicallyCoiled Tube Heat
    連結:
  26. 37. A. Zachar, “Investigation of Natural Convection Induced Outer Side Heat Transfer Rateof Coiled-Tube Heat Exchangers,” International Journal of Heat and Mass Transfer, Vol. 1, No. 2, 2012, pp.7892-7901
    連結:
  27. 2. K. E. Reby Roy, Rohit N. Shenoy, and Bibin Prasad, “Numerical Analysisof Forced Convective Heat Transfer Through Helical Channels,”InternationalJournal of Engineering Sciences and Technology, Vol. 4, Issue7,2012,pp.3352-3359.
  28. 3. AshokReddyK.BhavanthandP. RamReddy,“ExperimentalEstimation of Heat TansferCosfficients Using Helical Coil in A Agitated Vessel,”International Journal of Engineering Trends and Technology,Vol. 3,Issue2,2012, pp. 113-122.
  29. 4. J.S. Jayakumar, S.M. Mahajani, J.C. Mandal,P.K. Vijayan, RohidasBhoi,
  30. 5. Pramod S. Purandare, Mandar M. Lele, and Raikumar Gupta, “ParametricAnalysis of Helical Coil Heat Exchanger,”International Journal of Engineering Research & Technology, Vol. 1, Issue 8,2012, pp. 1-5.
  31. 6. HarithNoori Mohammed, “Effect of Curvature Ratio on the Heat Transferand Pressure Drop in Coiled Tube,”International Journal of Engineering Sciences, Vol.2, No. 2, 2009, pp. 1-14.
  32. 44
  33. No 3, 2009, pp.221-232.
  34. 8. H.Ju,Z.Huang,Y. Xu, B. Duan, Y. YuJ. Nucl.Sci. Technol,“HydraulicPerformance of Small BendingRadius Helical Coil-Pipe,”Journal of Food Engineering, Vol. 2, No 1, 2001, pp.826-831.
  35. 45
  36. Bashir,AhmerRaisKhan,KanwarNaveed Ahmad, Sarfaraz Khan“CFD Applications inVarious Heat Exchangers Design,”International Journal of Engineering Sciences, Vol.2, No. 2, 2010, pp.1-12.
  37. 18. H. J. Kang, C. X. Lin, and M. A. Ebadian, “Condensation of R-134a
  38. FlowingHelical Pipe,” International Journal of Heat and Mass Transfer, Vol. 43, No. 4, 2000, pp. 2553-2564.
  39. 20. T. J. Rennie and VijayaG.S. Raghavan,“Numerical Studies of a
  40. Double-pipe Helically Heat Exchanger,”Applied Thermal Engineering, Vol. 26,No. 13, 2006, pp.1266-1273.
  41. 46
  42. AHelical Tube HeatExchanger,”Journal of Food Engineering,Vol. 4, No. 3, 2003, pp.211–214.
  43. 22. P. C. Mukeshkumar, J. Kumar, S. Suresh, and K. Praveen, “ExperimentalStudy on Parallel and Counter Flow Configuration of A Shell and Helically CoiledTube Heat Exchanger Using Al2O3/Waterof Fluid,”J. Mater. Environ. Sci., Vol.3, No. 4, pp. 766-775.
  44. 25. J.S. Jayakumar, S.M. Mahajani, J.C. Mandal,P.K. Vijayan, and RohidasBhoi,“Experimental and CFD Estimation of HeatTransfer in Helically Coiled Heat,”International Communications in Heat and Mass Transfer,Vol. 1, No. 3,pp.221-232.
  45. 47
  46. 32. E.E. Wilson,“A Basis of Rational Design of Heat Transfer Apparatus,”
  47. ASMEJournal of Heat Transfer,Vol. 1, No. 3,1915, pp.47–70.
  48. 34. 王啟川,熱交換器設計,新竹:五南圖書出版公司,2006,第29-66頁。
  49. 35. SadlkKakac, and Hongtan Liu,“Heat Exchangers Selection, and Thermal Design,”Boca Raton, Fla, 2002, pp.108-119.
  50. 48
  51. Exchangers,“Applied Thermal Engineering, Vol. 3, No. 2, 2010, pp. 264-270.