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Åë»ó Compressor(centrifugal)¿¡´Â PSV°¡ overpressure protection device·Î ÇÔ²² ¼³Ä¡°¡ µÇ´Âµ¥,
À̶§ PSV set pressure¿¡ ´ëÇÏ¿© Àǹ®Á¡ÀÌ ÀÖ½À´Ï´Ù.
1) PSV set pressure´Â CompressorÀÇ shut-in pressure¿Í °°¾Æ¾ß ÇÑ´Ù?! °°°Å³ª ÀÛ¾Æ¾ß ÇÑ´Ù?!
- º» ¹®Á¦´Â Compressor µÞ´ÜÀÇ PipelineÀÇ incidental pressure¹®Á¦ ¶§¹®¿¡ »ý°Ü³µ½À´Ï´Ù. PipelineÀÇ incidental pressure°¡ ¸¸¾à 100bargÀ̸é, ÀÌ°Í¿¡ ¸ÂÃß¾î PSV¸¦ 100bargº¸´Ù ¾à 10%ÀÛ°Ô, Áï 91 barg(Accumulated 10%)°í·ÁÇÏ¿©, ¼³°è¸¦ ÇؾßÇÕ´Ï´Ù¸¸(incidental pressure´Â ªÀº ½Ã°£ÀÌ¶óµµ ³Ñ¾î¼¸é ¾ÈµÇ´Â pressure), CompressorÀÇ shut-in pressure´Â 100bargÀÌ°í, PSV set pressure´Â 91bargÀÌ¸é ¹®Á¦°¡ µÇ´ÂÁö¿ä?
Áï, Set pressure°¡ ¹Ýµå½Ã CompressorÀÇ shut-in pressure¿Í °°¾Æ¾ß¸¸ ÇÏ´ÂÁö, ¾Æ´Ï¸é °°°Å³ª À۾Ƶµ µÇ´ÂÁö¿¡ ´ëÇÑ Àǹ®ÀÔ´Ï´Ù.
API¸¦ º¸¸é PSVÀÇ Set pressure for vesselÀº MAWPº¸´Ù °°°Å³ª ÀÛ¾Æ¾ß ÇÑ´Ù°í µÇ¾î Àִµ¥, CompressorÀÇ °æ¿ì¿¡´Â ´Ù¸¥ ¿¹¿Ü(Shut-in pressure = PSV set pressure)°¡ Àû¿ëÀÌ µÇ´ÂÁö ±Ã±ÝÇÕ´Ï´Ù. Ȥ½Ã °ü·Ã API¾ð±ÞÀ̳ª reference°¡ ÀÖÀ¸½Ã¸é ºÎŹµå¸³´Ï´Ù.
2) À§¿Í´Â º°µµ·Î ¾î¶² ÀåºñÀÇ Design pressure°¡ 100barg¿©¼ discharge PSV set pressure¸¦ 100 barg·Î Çß´Ù¸é, µÞ´ÜÀÇ PipelineÀº 110barg, Áï accumulated overpressure 10%¸¦ °í·ÁÇÑ °ªÀ¸·Î designÀ» ÇؾßÇÏ´ÂÁö, ¾Æ´Ï¸é 100 barg·Î ÇؾßÇÏ´ÂÁö ±Ã±ÝÇÕ´Ï´Ù.
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Á¦°¡ Ȥ½Ã¶óµµ À߸ø ÀÌÇØÇÏ°í ÀÖ´Â ºÎºÐÀÌ ÀÖÀ¸¸é, ÁöÀûµµ ºÎŹµå¸³´Ï´Ù.
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