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A. Compressor Emergency Shutdown½Ã Surge°¡ °É¸®´Â ÀÌÀ¯¸¦ ¾Ë°í ½Í½À´Ï´Ù.
Centrifugal type, Fixed motor, 3´Ü¾ÐÃà±âÀÎ C3 ³Ãµ¿±â»çÀÌŬÀÔ´Ï´Ù. Dynamic simulation°á°ú Á¤»ó»óÅ·Π¿îÀüÇÏ´ø ½Ã½ºÅÛ¿¡¼ compressor power°¡ ³ª°¬À»¶§, 1Ãʵµ ¾ÈµÇ´Â ½Ã°£¾È¿¡ surge°¡ ¹ß»ýÇÏ´Â °ÍÀ¸·Î ³ª¿Ô½À´Ï´Ù. Hot gas bypass lineÀ» ±¸ÇöÇØ º¸±âµµ ÇÏ°í anti-surge valve opening timeÀ» ª°Ô Çغ¸¾ÒÁö¸¸ ¿ªºÎÁ·À̾ú½À´Ï´Ù.
** 0s : Start
5s : Cut off power & fully open for anti-surge valves & suction throttle valves
8s : Stop
Q1. ÀÌ·¸°Ô Surge°¡ ¹ß»ýÇÏ°Ô µÇ´Â ÀÌÀ¯°¡ ¹«¾ùÀÎÁö¿ä? Motor speed°¡ ÁÙ¾îµé°í ÀÖ´Â ±¸°£À̱â´Â ÇÏÁö¸¸, ¿©ÀüÈ÷ system³»ÀÇ duty°¡ °ø±ÞµÇ¾î Àִµ¥µµ ºÒ±¸ÇÏ°í ÀÌ·¸°Ô »¡¸® surge°¡ ¹ß»ýÇÏ´Â°Ô ÀÌÇØ°¡ µÇÁö¸¦ ¾Ê½À´Ï´Ù.
Q2. Shutdown½Ã¿¡´Â normally surgeÇö»óÀÌ ÀÚÁÖ ¹ß»ýÇϸç, ÀÌ´Â compressor life (20³â)¿¡ Å« ¿µÇâÀÌ ¾ø´Ù´Â ¾ê±â¸¦ ÁÖ¿öµé¾ú½À´Ï´Ù. »ç½ÇÀÎÁö ±Ã±ÝÇÕ´Ï´Ù.
B. Starup ½Ã¿¡ Discharge valve¸¦ (Open or Close?) ¾î¶»°Ô ÇÏ´Â°Ô ¸Â´Â °ÍÀÎÁö ±Ã±ÝÇÕ´Ï´Ù. »óȲÀº ¾Æ·¡¿Í °°½À´Ï´Ù.
ÇöÀç motor´Â max 10barg¿¡¼ ±¸µ¿ÀÌ °¡´ÉÇϵµ·Ï ¼³°è°¡ µÇ¾îÀÖÀ¸³ª (settle out 10barg), Àå±â°£ shutdown½Ã¿¡´Â °¡Àå ¶ß°Å¿î ¿©¸§¿¡19barg(at 49C)±îÁö ¿À¸¦ ¼ö°¡ ÀÖ´Ù°í ÆÇ´ÜÀÌ µË´Ï´Ù. ÀϹÝÀûÀ¸·Î DepressuringÀ» ÇÏ¸é µÉ ÅÍÀ̳ª, ¾öû³ ³Ã¸Å¼Õ½Ç°ú ´õºÒ¾î Ãß°¡ ³Ã¸Å ÀúÀå½Ã¼³ÀÌ ¾ø½À´Ï´Ù. ÇÏ¿©, Discharge¿¡¼ 1st SuctionÂÊÀ¸·Î hot gas bypass lineÀ» ¼³Ä¡ÇÏ°í, Compressor loop ÁÖº¯¿¡¸¸ 10bargÀÌÇÏ·Î DepressuringÇÑ ÈÄ¿¡ StartupÀ» ½Ç½ÃÇÏ°íÀÚ ÇÕ´Ï´Ù. ÇÏ¿©, compressor°¡ torque¸¦ À̰ܳ»°í ¾î´ÀÁ¤µµ speed¿¡ µµ´ÞÇßÀ»¶§, Discharge valve¸¦ ¿°í (recylce valve closed) Á¤»ó¿îÀü »óÅ·Π°¡¸é µÇÁö ¾ÊÀ»±î ÇÕ´Ï´Ù.
Q3. À̶§, DischargeÀÇ positionÀº ¾î¶»°Ô µÇ¾î¾ß ÇÏ´Â°Ô ¸Â´Â °ÍÀΰ¡¿ä? ¿ì¼±, check valve°¡ ÀÖ¾î¼ compressor°¡ system ÀÌ»óÀÇ ¾Ð·Â¿¡ µµ´ÞÇϱâ Àü±îÁö´Â reverse flow°¡ ¾øÀ» °ÍÀ¸·Î ÆÇ´ÜÀÌ µÇÁö¸¸ ½Å·ÚÇÒ ¼ö ¾ø´Ù°í ÆÇ´ÜÀÌ µË´Ï´Ù. ÇÏ¿© closeÇÑ »óÅ¿¡¼ ±âµ¿À» ÇÏ´Â °ÍÀÌ ÁÁÁö ¾ÊÀºÁö ±Ã±ÝÇÕ´Ï´Ù.