¤Ø³ÅѡɳСÒöèÒÂà·¤ÇÒÁÃé͹¢Í§à¤Ã×èͧáÅ¡à»ÅÕ蹤ÇÒÁÃé͹Ẻà·ÍÃìâÁ䫿͹ª¹Ô´ÅÙ»·Õèãªé R-134a à»ç¹ÊÒ÷ӧҹ

Heat transfer characteristics of loop Thermosyphon heat exchanger filled with R-134a

Name: ¹Ø¡Å ÁÑ蹤§

Organization : ÁËÒÇÔ·ÂÒÅÑÂà·¤â¹âÅÂÕ¾ÃШÍÁà¡ÅéÒ¾Ãй¤Ãà˹×Í. ¤³ÐÇÔÈÇ¡ÃÃÁÈÒʵÃì

Email : Ngo_koon@hotmail.com

Name: ¸¹Ò¤Á Êع·ÃªÑ¹Ҥáʧ

Organization : ÁËÒÇÔ·ÂÒÅÑÂà·¤â¹âÅÂÕ¾ÃШÍÁà¡ÅéÒ¾Ãй¤Ãà˹×Í. ¤³ÐÇÔÈÇ¡ÃÃÁÈÒʵÃì

keyword: ÍѵÃÒ¡ÒÃäËÅàªÔ§ÁÇÅ

ThaSH: à¤Ã×èͧáÅ¡à»ÅÕ蹤ÇÒÁÃé͹

ThaSH: ¤ÇÒÁÃé͹ -- ¡ÒöèÒÂà·

ThaSH: à·ÍÃìâÁ䫿͹

ThaSH: ÊÒ÷ӤÇÒÁàÂç¹

Abstract: §Ò¹ÇԨѹÕéÁըشÁØè§ËÁÒÂà¾×èÍÈÖ¡ÉҤسÅѡɳСÒöèÒÂà·¤ÇÒÁÃé͹¢Í§à¤Ã×èͧáÅ¡à»ÅÕ蹤ÇÒÁÃé͹Ẻà·ÍÃìâÁ䫿͹ª¹Ô´ÅÙ» (Loop thermosyphon heat exchanger) ·èͤÇÒÁÃé͹·Ó´éÇ·èͷͧᴧ »ÃСͺ´éÇÂÍÕÇÒâ»àÃàµÍÃìáÅФ͹ഹà«ÍÃìÁÕ¢¹Ò´àÊé¹¼èÒ¹ÈÙ¹Âì¡ÅÒ§ÀÒÂã¹à·èҡѺ 17.40 mm â´ÂÍÕÇÒâ»àÃàµÍÃìáÅФ͹ഹà«ÍÃìÁÕ¤ÇÒÁÂÒÇà·èҡѺ 100 áÅÐ 150 mm µÒÁÅӴѺ àª×èÍÁµè͡Ѻ·èÍÊè§äÍáÅзèÍÊ觢ͧàËÅÇ·ÕèÁÕÍѵÃÒÊèǹ¢Í§¢¹Ò´àÊé¹¼èÒ¹ÈÙ¹Âì¡ÅÒ§ÀÒÂ㹢ͧ·èÍÊè§ä͵èÍ·èÍÊ觢ͧàËÅÇ (IDv/IDl) à·èҡѺ 0.74, 1.0 áÅÐ 2.06 µÒÁÅӴѺ ãªéÊÒ÷ӤÇÒÁàÂç¹ R-134a à»ç¹ÊÒ÷ӧҹÍѵÃÒ¡ÒÃàµÔÁà·èҡѺ 18 à»ÍÃìà«ç¹µì ¢Í§»ÃÔÁҵ÷èͤÇÒÁÃé͹ÃÇÁ ·Ó¡Ò÷´Åͧ¡Ñº¹éÓàÂç¹ÍسËÀÙÁÔ¤§·Õè 20 ͧÈÒà«Åà«ÕÂÊ ÍѵÃÒ¡ÒÃäËÅàªÔ§ÁÇŢͧ¹éÓàÂç¹à·èҡѺ 3.33x10-3, 5.16x10-3 áÅÐ 6.66x10-3 kg/s ãËé¤ÇÒÁÃé͹´éÇÂÎÕµàµÍÃìä¿¿éÒẺ¿ÅÑ¡«ì¤ÇÒÁÃé͹¤§·ÕèÃÐËÇèÒ§ 14.20 ¶Ö§ 32.58 kW/m2 ¡ÒÃÇÔà¤ÃÒÐËìãªéËÅÑ¡¡Òâͧ¡ÒöèÒÂà·¤ÇÒÁÃé͹·Ò§à·ÍÃìâÁä´¹ÒÁÔ¡Êì ¼Å¡Ò÷´Åͧ¾ºÇèÒÍѵÃÒÊèǹ¢Í§·èÍÊè§ä͵èÍ·èÍÊ觢ͧàËÅÇ, ¿ÅÑ¡«ì¤ÇÒÁÃé͹áÅÐÍѵÃÒ¡ÒÃäËÅàªÔ§ÁÇŢͧ¹éÓËÅèÍàÂç¹ÁռŵèÍ»ÃÐÊÔ·¸ÔÀÒ¾¡ÒöèÒÂà·¤ÇÒÁÃé͹¢Í§à¤Ã×èͧáÅ¡à»ÅÕ蹤ÇÒÁÃé͹Ẻà·ÍÃìâÁ䫿͹ª¹Ô´ÅÙ»«Ö觷èͤÇÒÁÃé͹ÁÕ»ÃÐÊÔ·¸ÔÀÒ¾¡ÒöèÒÂà·¤ÇÒÁÃé͹ÊÙ§ÊØ´ 89.00 à»ÍÃìà«ç¹µì ·Õè¿ÅÑ¡«ì¤ÇÒÁÃé͹à·èҡѺ 18.71 kW/m2 ´éÇÂÍѵÃÒ¡ÒÃäËÅàªÔ§ÁÇŢͧ¹éÓËÅèÍàÂç¹ 6.66x10-3 kg/s áÅÐÁÕ¤èÒ¤ÇÒÁµéÒ¹·Ò¹¤ÇÒÁÃé͹ÃÇÁµèÓÊØ´ 0.16 K/W

Abstract: The objective of this research a study the heat transfer characteristics of loop thermosyphon heat exchanger filled with R-134a. The experimental heat pipe fabricated from the straight copper tube. The evaporator and condenser having same an inner diameter 17.40 mm (ID), The evaporator and condenser having length 100 and 150 mm respectively, Connected with vapor line and liquid line has diameter ratios amount 0.74, 1.0 and 2.06 (IDv/IDl) respectively. Experiment by changing filling ratio of R-134a is 18 percent of the volume of the heat pipe .The inlet water temperature of condenser was maintained constant at 20 degrees. Mass flow rate of water amount 3.33x10-3, 5.16x10-3 and 6.66x10-3 kg/s And heated by electrical heaters. The input constant heat flux between 14.20 to 32.58 kW/m2. The conversation of energy is a principles of this research. The results showed that the diameter ratios of the appropriate to diameter ratio amount 2.06 (IDv/IDl), Thermal efficiency was 89.00 percent of the maximum heat flux is equal to 18.71 kW/m2, Mass flow rate of water amount 6.66x10-3 kg/s and thermal resistance amount 0.16 K/W.

ÁËÒÇÔ·ÂÒÅÑÂà·¤â¹âÅÂÕ¾ÃШÍÁà¡ÅéÒ¾Ãй¤Ãà˹×Í. ÊӹѡËÍÊÁØ´¡ÅÒ§

Address: ¡Ãا෾ÁËÒ¹¤Ã

Email: library@kmutnb.ac.th

Created: 2556

Modified: 2568-12-12

Issued: 2568-12-12

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BibliograpyCitation : ã¹ ÁËÒÇÔ·ÂÒÅѺÙÃ¾Ò ¤³ÐÇÔÈÇ¡ÃÃÁÈÒʵÃì. ¡ÒûÃЪØÁÇÔªÒ¡ÒÃà¤Ã×Í¢èÒÂÇÔÈÇ¡ÃÃÁà¤Ã×èͧ¡ÅáË觻ÃÐà·Èä·Â ¤ÃÑ駷Õè 27 (ME-NETT 2013) (TSF2015). ªÅºØÃÕ : ÁËÒÇÔ·ÂÒÅѺÙþÒ

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