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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 陳希立 | |
| dc.contributor.author | Hsin-Hsuan Wu | en |
| dc.contributor.author | 吳欣璇 | zh_TW |
| dc.date.accessioned | 2021-06-15T06:59:00Z | - |
| dc.date.available | 2011-02-20 | |
| dc.date.copyright | 2011-02-20 | |
| dc.date.issued | 2011 | |
| dc.date.submitted | 2011-01-26 | |
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Muzychka and M. M. Yovanovich, “Laminar Flow Friction and Heat Transfer in Non-Circular Ducts and Channels Part I-Hydrodynamic Problem”, Proceedings of Compact Heat Exchanges, pp. 131-139. at Festschrift on the 60th Birthday of Ramesh K.Shah , Grenoble, France August 24, 2002. [12] R. J. Phillips, “Micro-channel heat sink,” Advances in Thermal Modeling of Electronic Components and Systems, A. Bar-Cohen and A. D. Kraus (eds.) New York: ASME, Ch. 3, 1990. [13] V. Gnielinski, “New equations for heat and mass transfer in turbulent pipe and channel flow”, International Chemical Engineer , Vol. 6, pp. 359-368, 1976. [14] K. Azar, R. S. McLeod and R.E. Caron, “Narrow Channel Heat Sink for Cooling High Powered Electronic Components”, Proceedings of the Eight Annual IEEE Semiconductor Thermal Measurement and Management Symposium, pp. 12-19, 1992. [15] R. W. Knight, D.J. Hall, J. S. Goodling and R.C. Jaeger, “Heat Sink Optimization with Application to Micro-channels”, IEEE Transactions on Components, Hybrids and Manufacturing Technology, Vol. 15, No. 5, pp. 832-842, October 1992. [16] R. W. Knight, J. S. Goodling, and B. E. Gross, “Optimal thermal design of air cooled forced convection finned heat sinks-experimental verification”, IEEE Transactions on Components, Hybrids, and Manufacturing Technology, Vol. 15, No. 5, pp.754-760, October 1992 [17] S. Lee, “Optimum Design and Selection of Heat Sink”, IEEE Transactions on Components, Packaging and Manufacturing Technology, Part A, Vol. 18, No. 4, pp.812-817, 1995. [18] D. Copeland, “Optimization of Parallel Plate Heat sinks for Forced Convection”, Proceeding of 16th Semiconductor Thermal Measurement & Management Symposium, pp. 266-272, San Jose, CA, 2000. [19] V. Lin and S. L. Chen, “Performance Analysis, optimum and verification for parallel plate heat sink Associated with single non-uniform heat source”, Proceedings of InterPack03 2003-35103 , Maui, Hawaii, USA ,July 6-11, 2003. [20] A. Bar-Cohen, “Fin Thickness for an Optimized Natural-Convection Array of Rectangular Fins,” Journal of Heat Transfer－Transactions of the ASME, vol. 101, pp. 564-566, 1979. [21] A. Bar-Cohen and W. M. Rohsenow, “Thermally Optimum Spacing of Vertical, Natural Convection Cooled, Parallel Plates,” Journal of Heat Transfer－Transactions of the ASME, vol. 106, no. 1, pp. 116-123, 1984. [22] V. R. Rao and S. P. Venkateshan, “Experimental Study of Free Convection and Radiation in Horizontal Fin Arrays,” International Journal of Heat and Mass Transfer, vol. 39, no. 4, pp. 779-789, 1996. [23] V. R. Rao, C. Balaji, and S. P. Venkateshan, “Interferometric Study of Interaction of Free Convection with Surface Radiation in An L Corner” International Journal of Heat and Mass Transfer, vol. 40, no. 12, pp. 2941-2947, 1997. [24] L. Dialameh, M. Yaghoubi, and O. Abouali, “Natural Convection from an Array of Horizontal Rectangular Thick Fins with Short Length,” Applied Thermal Engineering, vol. 28, no. 17-18, pp. 2371-2379, 2008. [25] S. W. Churchill and H. H. S. Chu, “Correlating Equations for Laminar and Turbulent Free Convection from a Vertical Plate” International Journal of Heat and Mass Transfer, vol. 18, pp. 1323-1329, 1975. [26] R.K. Shah and W. Aung , Handbook of single-phase convective heat transfer, S. Kakac, R. K. Shah and W. Aung (eds.), Chap. 4, Wiley, New York, 1987. [27] W. M. Kays and A. L. London, Compact Heat Exchangers, McGraw-Hill, New York, 1984. [28] H. H. Wu, Y. Y. Hsiao, H. S. Huang, P. H. Tang and S. L. Chen (in press)“A practical plate-fin heat sink model”, Applied Thermal Engineering, October 2010. [29] D. Copeland, Optimization of parallel plate heat sinks for forced convection, Proceeding of 16th Semiconductor Thermal Measurement & Management Symposium, San Jose, CA, pp. 266-272, 2000. [30] L.C. Burmeister, Vertical fin efficiency with film condensation. J. Heat Transfer 104 (1982) 391-393 [31] J. P. Holman, Heat Transfer, 7th ed., McGraw-Hill, Inc, 1995. [32] E. M. Sparrow and R. D. Cess, Radiation Heat Transfer, Wadsworth Publishing Co.,Inc.,New York, 1966. [33] F. P. Incropera and D. P. DeWitt, Fundamentals of Heat and Mass Transfer, 5th ed., John Wiley and Sons, pp. 795, 2002. [34] V. D. Rao, S. V. Naidu, B. G. Rao, and K. V. Sharma, “Heat Transfer from a Horizontal Fin Array by Natural Convection and Radiation－A Conjugate Analysis,” International Journal of Heat and Mass Transfer, vol. 49, no. 19-20, pp. 3379-3391, 2006. [35] 黃翔聖，自然對流增強散熱模組應用於高功率LED燈之研究，國立台灣大學機械工程學系研究所博士論文，2009。 [36] S. Lee, “Calculating Spreading Resistance in Heat Sink,” Electronics Cooling, vol. 4, no. 1, pp. 30-33, January 1998. | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/48491 | - |
| dc.description.abstract | 本文應用兩套分析模式來預測平板鰭片熱沉於強制對流及自然對流下的熱傳性能表現，並針對這兩種不同應用情況進行系統最佳化分析。
強制對流時，本文針對熱沉兩端壓降為10 mmAq、熱沉高度24 mm的情形下，分別探討熱沉的鰭片間距、基板厚度、鰭片厚度、熱沉寬度、熱沉長度對熱阻的影響，並針對這些變數進行最佳化設計。自然對流時，在本研究所設定的尺寸範圍內，鰭片高度、基板長度、基板寬度及基板厚度分別存在一極限值，超過此值後對於熱傳性能增強無太大的助益，本文考量成本因素後提出最適切尺寸大小的建議。 在強制對流的情況下，當通過熱沉的空氣流量較小時，其熱傳性能就必須考量自然對流的效應。以固定尺寸的熱沉及輸入散熱功率30 W時，本研究找出當強制對流空氣流量小於0.68 cfm(流速0.2 m/s)時，其強制對流的散熱性能(熱阻值為4.62℃/W)即低於自然對流的散熱性能(熱阻值為4.38℃/W)。 熱沉加裝風扇產生強制對流時，須考量風扇的性能操作曲線，再進行熱沉尺寸的最佳化設計分析。利用本分析模式，搭配某固定風扇的熱沉，可以在風量、壓降及熱沉尺寸上找到其最佳操作點。在本文中的例子，最佳操作點落在風量7 cfm、壓降0.858 mmAq、流道長度60 mm、鰭片厚度0.4 mm、鰭片間距2.08 mm與基板厚度11 mm，此時熱沉總熱阻為0.43 ℃/W。 | zh_TW |
| dc.description.abstract | Two analytical models were used in this study to predict the performance of a plate-fin array heat sink in forced convection and natural convection cases respectively. The optimization of geometry variables for designing a plate-fin heat sink in both cases was also analyzed in this study.
While the pressure drop of heat sink was fixed at 10 mmAq, and the height was fixed at 24 mm in forced convection situations, optimal values for fin spacing, base thickness, base width and base length were found. In natural convection situation, it was found that there are lower limits for the variation of fin height, base length, base width and base thickness of heat sink. Increase of these parameters has limited benefit of performance. Considering the limits of these parameters and the cost factors, the optimal values of these design parameters were suggested in this study. As the airflow rate through the heat sink becomes small in force convection, the effect of nature convection has to be considered. For the case of a fixed size of heat sink with a slow airflow velocity considered in this study, it’s found the overall performance of forced convection (with thermal resistance of 4.62 ℃/W) is worse than that of nature convection (with thermal resistance of 4.38 ℃/W) when airflow rate was under 0.68 cfm. In the case of forced convection using fan as driving force, the effect of fan performance curve has to be considered in the design optimization process of heat sink’s geometry variables. The optimal operating points of airflow rate, pressure drop and sizes of heat sink, can be found with this model for a single heat sink with a fixed fan. Example of the optimal operating point was illustrated in this study. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-15T06:59:00Z (GMT). No. of bitstreams: 1 ntu-100-D94522016-1.pdf: 955860 bytes, checksum: 51424d8616a36b2011b59f606957c43c (MD5) Previous issue date: 2011 | en |
| dc.description.tableofcontents | 誌 謝 i
摘 要 ii ABSTRACT iv 目 錄 vi 圖目錄 viii 表目錄 x 符號說明 xi 第一章 緒論 1 1-1前言 1 1-2文獻回顧 3 1-3研究目的 6 1-4研究方法 7 第二章 平板鰭片熱沉於強制對流下之基本理論 10 2-1強制對流的基本假設 10 2-2熱阻基本定義 11 2-3壓降分析 14 2-4對流熱傳分析 16 2-5熱沉基板之熱傳模式 20 第三章 平板鰭片熱沉於自然對流下之基本理論 25 3-1自然對流熱阻結構 25 3-2熱沉基板熱阻 26 3-3自然對流之熱沉對流輻射熱阻 26 第四章 熱沉模組最佳化分析 40 4-1熱沉於無限制條件下模組最佳化 40 4-1.1 熱沉在強制對流下之最佳化 40 4-1.2 熱沉在自然對流下之最佳化 43 4-2熱沉於不同對流法下之修正熱阻曲線 48 4-2.1 不同輸入功率之修正熱阻曲線 48 4-2.2 不同鰭片間隙熱沉修正曲線 50 4-3熱沉於限制條件下的最佳化 51 4-3.1 風扇性能曲線分析 52 4-3.2 固定風扇及熱沉高度、寬度下之操作點分析 53 4-3.3 固定風扇及熱沉高度、寬度下之最佳化設計 55 第五章 結論 81 5-1結論 81 5-2未來展望 83 參考文獻 85 | |
| dc.language.iso | zh-TW | |
| dc.subject | 風扇 | zh_TW |
| dc.subject | 平板鰭片 | zh_TW |
| dc.subject | 強制對流 | zh_TW |
| dc.subject | 自然對流 | zh_TW |
| dc.subject | 最佳化 | zh_TW |
| dc.subject | Forced convection | en |
| dc.subject | fan. | en |
| dc.subject | optimization | en |
| dc.subject | plate-fin | en |
| dc.subject | nature convection | en |
| dc.title | 平板鰭片在自然及強制對流下之熱傳分析 | zh_TW |
| dc.title | Heat Transfer Analysis of Plate-Type Fins in Natural and Forced Convection | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 99-1 | |
| dc.description.degree | 博士 | |
| dc.contributor.oralexamcommittee | 盧昭暉,吳文方,雷顯宇,李雨,田華忠 | |
| dc.subject.keyword | 平板鰭片,強制對流,自然對流,最佳化,風扇, | zh_TW |
| dc.subject.keyword | Forced convection,nature convection,plate-fin,optimization,fan., | en |
| dc.relation.page | 89 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2011-01-26 | |
| dc.contributor.author-college | 工學院 | zh_TW |
| dc.contributor.author-dept | 機械工程學研究所 | zh_TW |
| 顯示於系所單位： | 機械工程學系 | |
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