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  Turbine Bypass ValveÀÇ Preheating ÇÊ¿ä ÀÌÀ¯
  ±Û¾´ÀÌ : ¾öÀç¿ë   °íÀ¯ID : treecraft     ³¯Â¥ : 19-06-14 17:36     Á¶È¸ : 2922    
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¹ßÀü¼Ò Turbine Bypass Valve¿¡ ´ëÇؼ­ °øºÎ¸¦ ÇÏ´Ù°¡ Valve Body Preheating(Warm-up) ÀÌÀ¯¿Í Á¶°Ç¿¡ ´ëÇؼ­ ±Ã±ÝÁõÀÌ »ý°Ü¼­ Áú¹®µå¸³´Ï´Ù.
Main Steam --> Bypass Valve Body --> Condenser
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°ú¿­Áõ±â¿Í Æ÷È­Áõ±â¿ÍÀÇ ¿ÂµµÂ÷ÀÌ°¡ 200µµ ³ª¸é Warm-up Ç϶ó´Â°Ô ÀÌÇØ°¡ Àß ¾ÈµË´Ï´Ù.
ÀúÈñ´Â 124 bar ¿¡ 543µµ °ú¿­Áõ±â¸¦ »ç¿ëÇϴµ¥, 124 bar¿¡ ÇØ´çÇÏ´Â Æ÷È­Áõ±â ¿Âµµ´Â ¾à 325µµÁ¤µµ°¡ µË´Ï´Ù.
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-÷ºÎÆÄÀÏ Ãâó : PARCOL
                       Bulletin 1- XI
                       Issue 09-2012

½ºÅ×Æijë Stefano   19-06-14 20:04
Main SteamÀ» Condenser¿¡ °ø±ÞÇÏ°í ÀÖ´Â Bypass¸¦ Sketch·Î ¼³¸íÇÏ°í Àִµ¥  Bypass Valve Body¿Í Bypass°£ÀÇ Â÷ÀÌ°¡ ±Ã±ÞÇÏ°í,  ¶ÇÇÑ BypassÇÏ·Á´Â ¸ñÀû°ú  Preheating ÇÏ·Á´Â ´ë»ó ValveÀÇ ±¸Ã¼Àû ¿ëµµ°¡ ¼³¸íµÇ¾î ÀÖÁö ¾Ê¾Æ ´äº¯ÀÌ ¾î·Æ½À´Ï´Ù.

Ȥ½Ã °ú¿­Áõ±â¸¦ Desuperheating ÇÒ ¸ñÀûÀ¸·Î Injection ÇÏ´Â WaterÀÇ ¾çÀÌ ¿ÂµµÂ÷°¡ ¸¹À» ¼ö·Ï ´Ã¾î³ª,  ¹Ìó Áõ¹ßµÇÁö ¾ÊÀº Water DropletsÀÇ ¹®Á¦·Î Steam ¹è°ü³» Erosion ¹æÁö¸¦ À§ÇØ WaterÀÇ ¿Âµµ¸¦ ³ô¿©Áְųª ÁÖÀÔ¿ë ¹ëºê¸¦ °¡¿­Ç϶ó´Â Àǹ̰¡ ¾Æ´ÑÁöµµ ¸ð¸£°Ú½À´Ï´Ù. 

ÇØ´çºÎºÐÀÇ ¿ø¹®À» Àß »ìÆìºÁ¾ß ÇÒ °Í °°½À´Ï´Ù.
¶Ü¶ÜÀÌ kcci1117   19-06-26 14:10
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ÀϹÝÀûÀ¸·Î Bypass valveÀÇ Preheating ¸ñÀûÀº Å©°Ô ¾Æ·¡¿Í °°ÀÌ »ý°¢ÇØ º¼ ¼ö ÀÖ½À´Ï´Ù.

1) Bypass Valve inlet lineÀÇ Condensate »ý¼º¹æÁö
 - Valve Á¦ÀÛ¾÷ü ÀÔÀå¿¡¼­ PreheatingÀÇ  °¡Àå Å« ¸ñÀûÀº valve inlet¿¡ ÀÀÃà¼öÀÇ »ý¼ºÀ» ¹æÁöÇÏ¿© valve ±âµ¿½Ã trimÀÇ erosionÀ» ¹æÁöÇÏ´Â °ÍÀÔ´Ï´Ù. ¸¸¾à condeate°¡ Á¸ÀçÇϸé valve¸¦ open½Ã trim À» Áö³ª°¡¸ç erosionÀÌ ¹ß»ýµÇ¾î trimÀÌ ¼Õ»óµÇ¸ç ÀÌ·Î ÀÎÇØ valve close ½Ã leakge°¡ ¹ß»ýÇÏ¿© Ç÷£Æ® È¿À²À» ¶³¾î Æ®¸³´Ï´Ù. ƯÈ÷ condenser·Î °¡´Â lineÀÏ °æ¿ì(IP or LP Bypass)´Â ÈÄ´ÜÀÇ vaccumÀ» Á¶°ÇÀ» ±ú¶ß·Á ½ÉÇÑ °æ¿ì Plant shut downÀ» ¾ß±â½Ãų¼ö ÀÖ½À´Ï´Ù.
 
- À̸¦ ¹æÁöÇϱâ À§ÇØ preheating lineÀ» ¼³Ä¡ÇÏ¿© start-up Áß condensate´Â drain(ex. Drip leg)À¸·Î ¿ÏÀüÈ÷ Á¦°Å ÈÄ  normal opeartion µ¿¾È¿¡ ÀÀÃà¼ö°¡ »ý±â´Â °ÍÀ» ¹æÁöÇϱâ À§ÇØ ÁÖ¾îÁø ¾Ð·Â¿¡¼­ saturation ¿Âµµ¸¦ ±âÁØÀ¸·Î ƯÁ¤ ¿Âµµ ÀÌ»ó/ÀÌÇÏ¿¡ (¿¹¸¦ µé¸é Sat + 50 deg C)¿¡¼­ preheat line¿¡ ÀÖ´Â valve¸¦ on/off ÇÏ¿© ÀÀÃø¼ö »ý¼ºÀ» ¹æÁöÇÕ´Ï´Ù.

2) Valve body Thermal Cycling
 - ÷ºÎÇØ ÁֽŠManufactuereÀÇ bulletinÀ» º¸¸é Figure 12´Â À§¿¡¼­ ¸»¾¸ÇϽŠ°Íó·³ ÇØ´ç¾Ð·Â¿¡¼­ Saturated temp + 200 degC·Î Á¤ÀÇÇÏ¿© ±× ÀÌ»óÀÇ °æ¿ì´Â Valve preheatingÀ» ±ÇÀåÇÏ°í ÀÖ½À´Ï´Ù. valve bodyÀÇ preheating Àû¿ë¿©ºÎ´Â °¢ valve Á¦Á¶»ç¸¶´Ù ÀÚü ±âÁØÀÌ ´Ù¸£¸ç ÇöÀç ÷ºÎÀÇ Á¦Á¶ ¾÷ü´Â 200 deg C¸¦ ±âÁØÀ¸·Î bodyÀÇ Thermal cycling¿¡ ´ëÇÑ °í·Á¸¦ ¿ì·ÁÇÏ°í ÀÖ´Â °ÍÀ¸·Î º¸ÀÔ´Ï´Ù.(Casting body(ÁÖÁ¶)  ¹× pipeÀÇ Thermal cyclingÀ» °í·ÁÇÑ °ÍÀ¸·Î º¸ÀÓ)

-  Valve Á¦Àۻ翡 µû¶ó ForgingÀ¸·Î body¸¦ Á¦ÀÛÇÏ¿© ±× µÎ²²¸¦ ÀÏÁ¤ÇÏ°Ô °¡Á®°¡´Â°æ¿ì´Â ±âº»ÀûÀ¸·Î body ÀÚü¿¡ preheatingÀº ÇÊ¿ä°¡ ¾ø´Ù°í ÇÏ´Â °æ¿ìµµ ÀÖ½À´Ï´Ù.(¿­ÀÀ·Â ¹ß»ý ¹æÁö design)

Ãß°¡·Î ±âº»ÀûÀ¸·Î ÈÄ´Ü pipeÀÇ preheatingÀ» À§ÇØ pre-heating lineÀ» ¼³Ä¡ÇÏ´Â °æ¿ì´Â °ÅÀÇ ¾ø½À´Ï´Ù.

Áú¹®¿¡ ´äº¯ÀÌ µÇ¾úÀ¸¸é ÇÕ´Ï´Ù.
   

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