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  Orifice Sizing ¹× °ËÅä Áú¹®
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Orifice °ËÅäÁß ±Ã±ÝÇÑÁ¡ÀÌ »ý°Ü Áú¹®µå¸³´Ï´Ù.

Orifice ¼³°è°ª : Max À¯·® 300m3/hr, Differential Range 2500mmh20, Pressure Loss 1800mmh2o Beta ratio 0.6 À϶§
°ËÅä °ª : À¯·® 400m3/hr ÀÌ¿Ü µ¿ÀÏ
À§ À¯·®À¸·Î °è»ê°á°ú  Differential Range 3700mmh2o, Pressure Loss 2300mmh2o °¡ ³ª¿Ô½À´Ï´Ù.(Program °è»ê °á°ú)
ÀÌ °á°ú½Ã ÇØ´ç Orifice´Â »ç¿ë°¡´ÉÇÏ´Ù°í ºÁ¾ßÇϳª¿ä ¾Æ´Ï¸é ±³Ã¼ÇؾßÇϳª¿ä?
Á¦°¡ °øºÎÇغ» °á°ú·Î´Â Pressure Loss°¡ 2300À¸·Î ±âÁ¸ ¼³°è Diff. Range 2500 ³»¿¡ µé¾î°¡±â ¶§¹®¿¡ ÃøÁ¤°¡´ÉÇϹǷΠ»ç¿ëÇÏ´ÉÇÏ´Ù Àε¥¿ä ¸Â´ÂÁö Á¶¾ðºÎŹµå·Á¿ä
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±×¸®°í Orifice ±¸Á¶ÀûÀÎ Áú¹®Àä Pipe Size, Beta ratio °¡ ÀÏÁ¤ÇÒ¶§ Differential Range´Â ¹«¾ùÀ¸·Î Á¶ÀýÇϳª¿ä?

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½ºÅ×Æijë Stefano   19-05-03 20:39
(1) Differential Range´Â ÇØ´ç Standard (ÃøÁ¤Çã¿ë ¿¡·¯¹üÀ§ ³») Àû¿ë½Ã ÃÖ´ë À¯·®¿¡¼­ÀÇ ¾Ð·ÂÂ÷¸¦ ¸»ÇÏ°í Pressure Loss´Â 400m3/h À¯·® Åë°ú½Ã ¼Õ½ÇµÇ´Â Permanent Pressure Loss °ªÀÔ´Ï´Ù. 
´çÃÊ ¼³°è°ª¿¡´Â 300 m3/hÀÏ ¶§ 2500mmH2O°¡ µÇµµ·Ï ¿¹»óÇߴµ¥ 400 m3ÀÏ ¶§ 3700 mmH2O¶ó°í ÇÑ´Ù¸é ÃøÁ¤ Error°¡ ´Þ¶óÁý´Ï´Ù. 

µû¶ó¼­.. ¸¸ÀÏ (1) ±× ¾Ð·ÂÂ÷¸¦ DPÃøÁ¤±âÀÇ ÃøÁ¤¹üÀ§¸¦ ¹þ¾î³ª´Â °æ¿ì¿¡´Â »ç¿ëÇÒ ¼ö ¾ø½À´Ï´Ù  ¶ÇÇÑ (2) ÃøÁ¤Error°¡ ÁÖ·Î ÃøÁ¤µÇ´Â À¯·®¹üÀ§³»¿¡¼­ ÀûÀýÇÑ(Çã¿ëÇÒ ¸¸ÇÑ Error ¹üÀ§ ³»¿¡ ÀÖ´Ù°íÇÑ´Ù¸é) »ç¿ëµÉ ¼ö ÀÖÁö ¾ÊÀ¸¸é Àû´Ù¾ÆÁö ¾Ê½À´Ï´Ù.  ±×¸®°í (3) ¾Ð·Â¼Õ½ÇÀÌ 2300mm¸¦  À̰ܳ»Áö ¸øÇÏ´Â ÆßÇÁ°¡ ´Þ·ÁÀְųª ³ª Áß·ÂÈ帧 ½Ã Gravity HeadÂ÷°¡ À̱âÁö ¸øÇÑ´Ù¸é »ç¿ëµÇÁö ¸øÇÕ´Ï´Ù.  À̵é 3°¡Áö Á¦ÇÑÀÌ ¾ø´Ù¸é »ç¿ëÀÌ °¡´ÉÇÕ´Ï´Ù.     

(2) ÀÌ¹Ì Á¤ÇØÁ® ÀÖ´Â Pipe Size, Orifice HoleÀÌ Á¤ÇØÁ® ÀÖ´Â »óÅ¿¡¼­´Â Differential RangeÀÇ Á¶ÀýÀº Transmitter¿¡¼­ Maximum À¯·®ÀÏ ¶§ÀÇ Â÷¾Ð°ªÀ¸·Î ÀÔ·ÂÇÏ¸é µË´Ï´Ù.    4~20 mA Transmitter¿¡¼­ Â÷¾Ð 0ÀÏ ¶§ 4 mAÃâ·ÂÀÌ ³ª¿Àµµ·Ï (Zero Setting)ÇÏ°í 20 mA Ãâ·ÂÀ» ³ªÅ¸³¾ ¶§ÀÇ Â÷¾ÐÀ» Transmitter Parameter·Î ÁöÁ¤ÇÏ¸é µË´Ï´Ù.  ¿À·§µ¿¾È »ç¿ëÈÄ CalibrationÇÒ °æ¿ì¿¡´Â 20mAÀÏ ¶§ÀÇ À¯·®À» Á¤È®È÷ ¾Ë¾Æ¾ß  ¼³Á¤ÇÒ ¼ö ÀÖ´Ù´Â °ÍÀÔ´Ï´Ù
     
EngY jas502   19-05-21 17:44
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