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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 周賢福 | |
| dc.contributor.author | Chia-Liang Liu | en |
| dc.contributor.author | 劉家良 | zh_TW |
| dc.date.accessioned | 2021-06-13T16:31:45Z | - |
| dc.date.available | 2008-07-11 | |
| dc.date.copyright | 2005-07-11 | |
| dc.date.issued | 2005 | |
| dc.date.submitted | 2005-07-11 | |
| dc.identifier.citation | 1. Arpaci, V. S., 1966, Conduction Heat Transfer. Addison Wesley, Reading, MA.
2. Bonacina, C., Guidice, S. Del, and Comlni, G., 1979, “Dropwise Evaporation,” Journal of Heat Transfer, Vol. 101, pp. 441-446. 3. Carslaw, H. S. , and Jaeger, J. C., 1959, Conduction of Heat in Solids, 2nd edn, pp. 309. Clarendon Press, Oxford. 4. Cengel, A., 1988, Heat Transfer, McGraw Hill, N.Y.. 5. Estes, K. A., and Mudawar, I., 1995, “Correlation of Sauter Mean Diameter and Critical Heat Flux for Spray Cooling of Small Surfaces” Int. J. Heat Mass Transfer, Vol. 38, No. 16, pp. 2895-2996. 6. Ettouney, H. M., El-Dessouky, H. T., Bouhamra, W., and Al-Azmi, B., 2001, “Performance of Evaporative Condensers,” Heat Transfer Engineering, Vol. 22, pp. 41-55. 7. Finlay, I. C., and Grant W. D., 1972, “Air Coolers,Cooling Towers and Evaporative Coolers,” Report No. 534, National Engineering Laboratory, East Killbride, Glasgow, pp. 17-22. 8. Finlay, I. C., and Grant W. D., 1972, “The Accuracy of Some Simple Methods of Rating Evaporative Coolers,”Report No. 584, National Engineering Laboratory, East Killbride, Glasgow. 9. Goodman, W., 1938, “The Evaporative Condenser,” Heating, Piping and Air Conditioning, Vol. 10, pp.165-328. 10. Graham, K. M., and Ramadhyani, S., 1996, “Experimental and Theoretical Studies of Mist Jet Impingement Cooling,” Journal of Heat Transfer, Vol. 118, pp. 343-349. 11. Grissom, W. M., and Wierum, F. A., 1981, “Liquid Spray Cooling of a Heated Surface,” Int. J. Heat Mass Transfer, Vol. 24, pp. 261-271. 12. Leidenfrost, W., and Korenic, B., 1982, “Evaporative Cooling and Heat Transfer Augmentation Related to Reduced Condenser Temperatures,” Heat Transfer Engineering, Vol. 3, No. 3-4, pp. 38-59. 13. Mizushina, T. Ito, R., and Miyashita, H., 1968, “Characteristics and Methods of Thermal Design of Evaporative Coolers,” International Chemical Engineering, Vol. 8, No. 3, pp. 532-538. 14. Ortiz, Lester, and Gonzalez, Jorge E., 1999, “Experiments on Steady-State High Heat Fluxes Using Spray Cooling,” Experimental Heat Transfer, Vol. 12, pp. 215-233. 15. Parker, R. O., and Treybal, R. E., 1961, “The Heat, Mass Transfer Characteristics of Evaporative Coolers,” AIChE Chemical Engineering Progress Symposium Series, No. 32, Vol. 57, pp. 138-149. 16. Perterson, D., Glasser, D., Williams, D., and Ramsden, R., 1988, “Predicting the Performance of an Evaporative Condenser,” Journal of Heat Transfer, Vol. 110, pp. 748-753. 17. Thomsen, E. G., 1946, “Heat Transfer in an Evaporative Condenser,” Refrigeration Engineering, Vol. 51, No. 5, pp. 425-431. 18. Toda, S., 1971, A study of mist cooling-thermal behaviors of liquid film formd from mist drops on a heated surface at high temperatures and high heat fluxes, Tohoku Univ. Tech. Rep. 36(2), pp. 299-350. 19. Wile, D. D., 1950, “Evaporative Condenser Performance Factors,” Refrigeration Engineering, Vol. 58, No. 1, pp. 55-63. 20. Yang, 1978, W. J., “Mechanics of Droplet Evaporation on Heated Surfaces” Lett. Heat Mass Transfer 5, pp. 151-155. 21. 王啟川， 2001， 熱交換器設計(I) ，五南圖書出版股份有限公司。 22. 林恒毅、莊豐銘， 2005， “同軸動力系統”， 台灣專利， 新型M263435號。 23. 林恒毅、莊豐銘、林文賢， 2005， “複合式熱交換器”， 台灣專利申請中， 申請案號93215097。 | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/38374 | - |
| dc.description.abstract | 近年來，由於溫室效應的影響，冷凍空調設備的需求量也與日俱增，如何有效的提高冷凍空調系統的工作效率，即可大量的降低用電量。本研究是將噴霧裝置應用在複合式熱交換器上，探討各種不同的操作條件下，如噴霧顆粒大小、風扇吹否、不同型式的複合式熱交換器等，對於熱傳效率的影響，以找出最佳化的設計，應用在冷凍空調設備上。
研究的結果顯示複合式熱交換器(有裸露銅管)在噴霧顆粒較小及有風扇吹拂時的熱傳效果最好；在風扇不吹拂的情況下，噴霧顆粒較大的反而熱傳效果較好；只吹風不噴霧又比只噴霧不吹風的熱傳效果好。總體而言，噴霧裝置應用在熱交換器上，大大的提升了傳統熱交換器的熱傳效果。 | zh_TW |
| dc.description.abstract | Recently, due to the global warming caused by the green house effect of various gases, the need of refrigeration and air-conditioning has been increased day by day. Increasing the efficiency of the refrigeratiion and air-conditioning system could reduce the electrical power consumption directly. The objective of present study is to apply the swirl atomizer to spray fine droplets on the composite heat exchangers, in order to perform an investigation on the controlling parameters associated with the droplet diameter, the forced convective effect, the changes in the types of the heat exchangers, and the effect on the over all heat transfer rate. Optimal operating conditions adapt to the refrigeration and the air-conditioning system is to be found.
According to the experimental results, the simultaneously effects of evaporation cooling with smaller spraying droplets and forced convection cooling could significantly enhance the heat transfer efficiency of the composite heat exchangers. But with no fan operating for forced convection, the heat transfer efficiency of spraying with the large droplets is better than the one with the small droplets. The efficiency of forced convection is better than spraying droplets when each one is operated alone. In conclusion, applying swirl atomizers to the composite heat exchanger could provide pronounced enhancement on its heat transfer efficiency. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-13T16:31:45Z (GMT). No. of bitstreams: 1 ntu-94-R92522318-1.pdf: 648424 bytes, checksum: f2f5df6430a34c4982511b836806e890 (MD5) Previous issue date: 2005 | en |
| dc.description.tableofcontents | 第一章 導論
1.1 研究動機................................................................................1 1.2 文獻回顧................................................................................2 1.3 研究目的................................................................................4 第二章 理論基礎 2.1 實驗系統................................................................................6 2.2 噴霧散熱之總熱傳係數..................................................7 2.2.1 液膜區...........................................................................7 2.2.2 乾燥區.........................................................................11 2.2.3 總熱傳係數U..............................................................12 第三章 實驗設備與步驟 3.1 實驗設備..............................................................................14 3.2 量測裝置..............................................................................16 3.3 實驗步驟..............................................................................17 第四章 結果與討論 4.1 理論預估..............................................................................19 4.1.1 噴霧顆粒大小的影響...................................................19 4.1.2 有無風扇吹拂之影響..................................................20 4.1.3 不同型式的複合式熱交換器之影響..........................21 4.2 實驗結果.............................................................................21 4.2.1 噴霧散熱與傳統風扇散熱的探討..............................21 4.2.2 不同噴霧顆粒對熱傳效果的探討..............................23 4.2.3 不同複合式熱交換器對熱傳效果的探討..................23 4.3 誤差討論.............................................................................25 4.4 最佳化設計……………………………………………….25 第五章 結論與建議 5.1 結論......................................................................................27 5.2 後續研究之建議..................................................................29 參考文獻..................................................................................................31 附圖..........................................................................................................34 附表.........................................................................................................51 附錄.........................................................................................................66 | |
| dc.language.iso | zh-TW | |
| dc.title | 噴霧裝置應用於複合式熱交換器之理論分析與研究 | zh_TW |
| dc.title | Theoretical Analysis of the Swirl Atomizers Applying to the Composite Heat Exchanger | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 93-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 陳瑤明,林恆毅 | |
| dc.subject.keyword | 噴霧,霧化,熱交換器, | zh_TW |
| dc.subject.keyword | swirl atomizer,heat exchanger, | en |
| dc.relation.page | 67 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2005-07-11 | |
| 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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