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«“√ “√ √“™∫— ≥±‘ µ¬ ∂“π ‰¡µ√’ æ≈ ß§√“¡, ¡™“¬ «ß»å «‘ ‡»… 803 ªï ∑’Ë ÛÚ ©∫— ∫∑’Ë Ù µ.§.-∏.§. Úıı π”¡“ √⠓߇ªì π°√“ø ®“°°“√»÷ °…“ º≈¢Õßµ— «æ“√“¡‘ ‡µÕ√å µà “ß Ê ∑’Ë ‡°‘ ¥ ¢÷È π √ÿ ª‰¥â ¥— ßµà Õ‰ªπ’È Ò. — ¡ª√– ‘ ∑∏‘Ï °“√∂à “¬ ‡∑ §«“¡√â Õπ‡©≈’Ë ¬ ”À√— ∫°“√‡¥◊ Õ¥¡’ ·π«‚πâ ¡‡æ‘Ë ¡¢÷È π ‡¡◊Ë Õ§ÿ ≥¿“æ‰Õ ‡©≈’Ë ¬ ø≈— °´å ¡«≈ ø≈— °´å §«“¡√â Õπ ·≈–Õÿ ≥À¿Ÿ ¡‘ Õ‘Ë ¡µ— «¢Õß°“√‡¥◊ Õ¥‡æ‘Ë ¡ ¢÷È π Ú. § « “ ¡ ¥— π ≈ ¥ ” À √— ∫ °√–∫«π°“√‡¥◊ Õ¥®–‡æ‘Ë ¡¢÷È π‡¡◊Ë Õ §ÿ ≥¿“æ‰Õ‡©≈’Ë ¬ ø≈— °´å ¡«≈ ·≈– ø≈— °´å §«“¡√â Õπ‡æ‘Ë ¡¢÷È π ·µà ¡’ ·π« ‚πâ ¡≈¥≈߇¡◊Ë ÕÕÿ ≥À¿Ÿ ¡‘ Õ‘Ë ¡µ— «¢Õß °“√‡¥◊ Õ¥‡æ‘Ë ¡¢÷È π Û. ®“°º≈°“√‡ª√’ ¬∫‡∑’ ¬∫ æ∫«à “ — ¡ª√– ‘ ∑∏‘Ï °“√∂à “¬‡∑§«“¡ √â Õπ‡©≈’Ë ¬¢ÕßÕÿ ª°√≥å ·≈°‡ª≈’Ë ¬π §«“¡√â Õπ·∫∫∑à Õ´â Õπ∑à Õ√à «¡»Ÿ π¬å ¢¥‡ªì π‡°≈’ ¬«¡“°°«à “Õÿ ª°√≥å ·≈° ‡ª≈’Ë ¬π§«“¡√â Õπ·∫∫∑à Õ´â Õπ∑à Õ √à «¡»Ÿ π¬å ·∫∫‡À¬’ ¬¥µ√ߪ√–¡“≥ √â Õ¬≈– Û-Ûı „π¢≥–∑’Ë §à “§«“¡ ¥— π≈¥¡“°°«à “ª√ –¡“≥√â Õ¬≈– Ò-˜ ·≈–§ÿ ≥¿“æ‰Õ∑’Ë ∑”„Àâ ‡°‘ ¥ partial dryout Ÿ ß°«à “‡¡◊Ë Õ‡ª√’ ¬∫ ‡∑’ ¬∫°— ∫∑à Õµ√ß. °‘ µ‘ °√√¡ª√–°“» ºŸâ ‡¢’ ¬π¢Õ¢Õ∫§ÿ ≥ ”π— °ß“π °Õß∑ÿ π π— ∫ πÿ π°“√«‘ ®— ¬ ( °«.) ∑’Ë π— ∫ πÿ π∑ÿ π«‘ ®— ¬. ‡Õ° “√Õâ “ßÕ‘ ß Ò. Kang HJ, Lin CX and Ebadian MA. çCondensation of R-134a Flowing In- side Helicoidal Pipeé. International Jour- nal of Heat and Mass transfer 2003; 43: 2553-2564. Ú. Yu B, Han JT, Kang HJ, Awwad A and Ebadian MA. çCondensation Heat Transfer of R-134a Flow Inside Heli- coidal Pipes at Different Orientationsé. International Communication in Heat and Mass Transfer 2003; 13 (6): 745- 754. Û. Garimellar S, Richards DE and Chris- tensen RN. çExperiment Investigation of Heat Transfer in Coiled Annular Ductsé. Journal of Heat Transfer Trans- action of the ASME 1988; 110: 329- 336. Ù. Rennie TJ and Raghavan GSV. çLaminar Parallel Flow in a Tube-in-Tube Helical Heat Exchangeré. Presentation at The AIC 2002 Meeting CSAE/SCGR Program Saskatoon, Saskachewan, Paper No. 02-406. 2002. ı. Owhadi A, Kenneth JB and Crain B. çForced Convection Boiling Inside Helically Coiled Tubesé. International Journal of Heat and Mass Transfer 1968; 11: 1779-1793. ˆ. Wongwises S, Polsongkram M. çEva- poration heat transfer and pressure drop of HFC-134a in a helically coiled con- centric tube-in-tube heat exchangeré. International Journal of Heat and Mass Transfer 2006; 49: 658-670. ˜. Berthoud G and Jayanti S. çCharac- terization of Dryout in Helical Coilsé, International Journal of Heat and Mass Transfer 1990; 33: 1451-1463. ¯. Seo K and Kim Y. çEvaporation Heat Transfer and Pressure Drop of R-22 in 7 and 9.52 mm. Smooth / Micro- Fin Tubeé. International Journal of Heat and Mass Transfer 2000; 43: 2869- 2882. ˘. Chiou CB, Lu DC and Wang CC. çPool Boiling of R-22, R-124 and R-134a on a Plain Tubeé. International Journal of Heat and Mass Transfer 1996; 40 (7): 1657-1666. Ò. Wongsa-ngam, J., Nualboonrueng, T. and Wongwises, S., çPerformance of Smooth and Micro-Fin Tubes in High Mass Flux Region of R-134a During Evaporationé, Heat and Mass Transfer 2002; 40: 425-435.
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