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  ±Û¾´ÀÌ : ÈƵ¹   °íÀ¯ID : yaye2000     ³¯Â¥ : 09-01-20 14:29     Á¶È¸ : 10381    
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Àú¹ø¿¡µµ ÀÌ»çÀÌÆ®¿¡¼­ ¸¹Àº µµ¿òÀ» ¹Þ¾Ò´Âµ¥ ÀÌ·¸°Ô
¶Ç µµ¿òÀ» ûÇÕ´Ï´Ù/
¹ßÀü¼Ò °Ç¼³ÇöÀå¿¡¼­ ±Ù¹«Çϴµ¥ ´ë·«¶óÀλóÀÇ À¯·®À» ±¸ÇÒ¶§°¡ ¸¹ÀÌ ÀÖ½À´Ï´Ù.
2ÀÎÄ¡ ÆÄÀÌÇÁÀÇ ¹°ÀÌ ¾Ð·Â 5kg/cm2À¸·Î È带¶§ À¯·®À» ±¸ÇÏ´Â °ÍÀÔ´Ï´Ù.
Q=AV¿¡¼­ V=·çÆ®2*g*(P/r) ÀÌ·±½ÄÀ¸·Î ±¸ÇÏ¸é µÉ²¨ °°Àºµ¥ Á¦°¡
±âÃÊ°¡ ºÎÁ·Çؼ­ÀÎÁö °è»êÀÌ ¾ÈµË´Ï´Ù.
¹°·Ð ÆÄÀÌÇÁ°¡ ¼öÆòÀ¸·Î ÀÖ´Ù°í ÇÏ°í º£¸£´©ÀÌ Á¤¸®¿¡¼­
¸¶Âû¼Õ½Ç ¹«½ÃÇÏ°í ¼öµÎ ¹«½ÃÇÑ °ÍÀÔ´Ï´Ù.
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½ºÅ×Æijë Stefano   09-01-21 17:25
(1) ÆÄÀÌÇÁ³»ÀÇ À¯·®°ú ¾Ð·Â°úÀÇ °ü°è ±âº»½Ä

ÆÄÀÌÇÁ³»¿¡ À¯Ã¼°¡ È带 ¶§ ¾Ð·Â¼Õ½ÇÀº ÀÌ°÷ °Ô½ÃÆÇ¿¡¼­µµ ¿©·¯¹ø ´Ù·é ÀûÀÌ Àִµ¥  ´ÙÀ½°ú °°Àº ±âº» ¼ö½ÄÀ¸·Î ³ªÅ¸³À´Ï´Ù. 

(¥ÄP) = 4* f (L/D) * (¥ñ)* (V^2/2 gc)........................................................................(1)

À§ÀÇ ¼ö½Ä¿¡¼­ »ç¿ëÇÏ´Â ´ÜÀ§¸¦ Metric Unit·Î ÇÏ´Â °æ¿ì, SI Unit¸¦ »ç¿ëÇÏ´Â °æ¿ì, English Unit¸¦ ¾²´Â °æ¿ì¿¡ µû¶ó gcÀÇ °ªÀÌ ´Þ¶óÁö±â ¶§¹®¿¡ À̰͸¸ ÁÖÀÇÇÏ¸é µË´Ï´Ù.

((Unit of ¥ÄP),(Unit of ¥ñ),(Unit of V),(Value and Unit of gc))¸¦ ¼ø¼­´ë·Î Á¶ÇÕÀ¸·Î ³ªÅ¸³»¸é ´ÙÀ½°ú °°½À´Ï´Ù.
Metric UnitÀÇ °æ¿ì (kgf/cm2, kg/m3, m/s, 9.8 kg-m/kgf/s^2)
SI UnitÀÇ °æ¿ì (N(=Pa/m2), kg/m3, m/s, 1)
English UnitÀÇ °æ¿ì (lbf/ft^2, lb/ft^3, ft/s, 32.2 (lbm/lbf)ft/s^2)

f=Fannings Friction Factor, °ü³» ¸¶Âû°è¼ö, ´ÜÀ§¾øÀ½ = (°üÀÌ »ó´ë°ÅÄ¥±â ¥å/D, Reynolds Number, Re)ÀÇ ÇÔ¼ö ...........(2)
(L/D)=(°ü±æÀÌ/°ü³»°æ)ÀÇ ºñ, ´ÜÀ§¾øÀ½= (Equivalent Length, as Number of ID's) ..............(3)

(2) °ü³» ¸¶Âû°è¼ö f ±¸Çϱâ

À§ÀÇ ½Ä(2)´Â ÆÄÀÌÇÁÀÇ Á¾·ù¿¡ µû¶ó ³»¸é °ÅÄ¥±â°¡ ´Ù¸£°í ¶Ç Reynolds Number(=¹Ðµµ*À¯¼Ó*Á÷°æ/Á¡µµ)·ÎºÎÅÍ ±¸ÇÒ ¼ö ÀÖ´Â µµÇ¥¿¡¼­ ±¸ÇÒ ¼ö ÀÖ½À´Ï´Ù.  ¸¶Âû°è¼öµµÇ¥ (Friction Factor Chart)¶ó°í Çϴµ¥  FanningÀÇ ¸¶Âû°è¼ö¸¦ ¸»ÇÕ´Ï´Ù.  °æ¿ì¿¡ µû¶ó¼­ Fanning ¸¶Âû°è¼öÀÇ 4¹è°ªÀÎ Darcy(ȤÀº Moody) Friction Factor·Î ³ªÅ¸³½ °Íµµ Àֱ⠶§¹®¿¡ »ç¿ë»ó ÁÖÀÇÇØ¾ß ÇÕ´Ï´Ù.

Reynolds No = (¹Ðµµ*³»°æ*À¯¼Ó)/(Á¡µµ).......................................................................(4)

±×·±µ¥ ¸¶Âû°è¼ö¸¦ ±¸ÇÏ·Á¸é Reynolds No¸¦ ¾Ë¾Æ¾ß ÇÏ°í Reynolds No¸¦ ±¸ÇÏ·Á¸é À¯¼ÓÀ» ¾Ë¾Æ¾ß ¾Ë¾Æ³¾ ¼ö ÀÖ½À´Ï´Ù.
µû¶ó¼­ ½ÃÇà¿ÀÂ÷ÀÇ ¹æ¹ýÀ¸·Î ±¸ÇØ¾ß ÇÕ´Ï´Ù. 

¸ÕÀú À¯¼ÓÀ» °¡Á¤ÇÏ°í Reynolds No¸¦ ±¸ÇÏ¿© ¸¶Âû°è¼ö¸¦ µµÇ¥¿¡¼­ ãÀº ´ÙÀ½ À̸¦ (1)½Ä¿¡ ³Ö¾îºÁ¼­ ¾Ð·ÂÂ÷°ª°ú ¸Â¾Æµé¾î°¡¸é °¡Á¤Çß´ø À¯¼ÓÀÌ ¸Â°í ±×·¸Áö ¾ÊÀ¸¸é óÀ½ °¡Á¤Çß´ø À¯¼Óº¸´Ù Áõ°¡½ÃÅ°°Å³ª °¨¼Ò½ÃÅ°´Â ¹æ¹ýÀ¸·Î Ãß°¡°è»êÇؼ­ ¾Ð·ÂÂ÷¿Í ºñ±³ÇØ ºÁ¾ß ÇÕ´Ï´Ù. 

(3) Àü°úÁ¤ À¯·® ±¸Çϱâ ÀýÂ÷

1) ¾Ð·ÂÂ÷ ¥ÄP´Â ¾Ë°í ÀÖ´Ù°í ÇÏ°í  À¯¼Ó V¸¦ °¡Á¤
2) ¾Ë°í ÀÖ´Â °ª (D, ÆÄÀÌÇÁ Á¾·ù, ¹°¼º(¹Ðµµ, Á¡µµ))¹× °¡Á¤ÇÑ À¯¼ÓÀ» ±âÁØÀ¸·Î (4)½ÄÀ» ÀÌ¿ëÇؼ­ Reynolds No ±¸ÇÔ
3) ÀÌ Reynolds No.¿Í µµÇ¥·Î ºÎÅÍ f °ªÀ» ±¸ÇÔ
4) À§ÀÇ (1)½Ä¿¡ f¸¦ ´ëÀÔÇؼ­ °è»êµÈ ¾Ð·ÂÂ÷°¡ 1)¿¡¼­ Á¤ÇÑ Áº¯(¾Ë°íÀÖ´Â)¾Ð·ÂÂ÷¿Í °°ÀºÁö Á¡°Ë
5) ¸¸ÀÏ ¾Ð·ÂÂ÷°¡ ´Ù¸£¸é 1)·Î µ¹¾Æ¿Í ´Ù½Ã °è»ê, °°À¸¸é °¡Á¤ÇÑ V°¡ ¸ÂÀ½
6) V·ÎºÎÅÍ (À¯·®)=(ÆÄÀÌÇÁ ´Ü¸éÀû)*(À¯¼Ó)·Î °è»ê

Ȥ½Ã ¼³¸íÀÌ ºÎÁ·ÇÏ´Ù »ý°¢µÇ¸é ´ä±Û·Î Ãß°¡ Áú¹®ÇØ ÁÖ¼¼¿ä.
¾î¸°¾ÆÇØ yobazure   09-07-02 21:52
Áú¹®ÀÖ½À´Ï´Ù.
´ÙÀ½°ú °°Àº Á¤º¸°¡ ÀÖÀ» ¶§,

<Operation Condition>
-Pressure @up              45.30Kg/cm2.G
-Pressure @down          43.64Kg/cm2.G
<Piping Information>
-Nominal Size                4inch
-Line length,straight      96m
-Net Elevation Change    14m
-Equivalent Length        95.9m
-Pipe inside Dia.              0.102m
-Wall Roughness            0.046mm
<Liquid Phase Calculation>
-Flow Rate                    56,779Kg/h
-Density @PT                953.4Kg/m3
-Viscosity @PT              0.253cP
-Vol. Flow                      59.6m3/hr
-Velocity                        2.01m/s
-Reynolds No.                7.76E+05
-Friction Factor              0.0170
-Press. @Out                43.641Kg/cm2.G
-Pressure Drop by Friction 0.3142Kg/cm2
-Pressure Drop by Gravity 1.344Kg/cm2
-Dp / 100m (by friction)  0.3276Kg/cm2

40Kg/cm2.G¿¡¼­ÀÇ Velocity¸¦ ±¸ÇÏ°íÀÚ ÇÕ´Ï´Ù.
±× Àü¿¡ ¾Õ¼­ ÁÖ¾îÁø Á¤º¸¿¡¼­ ¾Ð·ÂÀ» ¸ð¸¥´Ù°í °¡Á¤ÇÏ°í
¾Ð·ÂÀ» °è»êÇØ º¸´Ï 45.3Kg/cm2.Gº¸´Ù ÅξøÀÌ ÀÛÀº 0.3 °¡·® ³ª¿É´Ï´Ù.

Á¦°¡ ±¸ÇÑ °ªÀº µ¨Å¸PÀÎ °Í °°Àºµ¥ À§¿¡¼­ ¸»¾¸ÇØ ÁֽŠ(1)½ÄÀ¸·Îµµ
Á¦°¡ ±¸ÇÏ°íÀÚ ÇÏ´Â °ª (Áï, 40Kg/cm2.G¿¡¼­ÀÇ Velocity)À» ±¸ÇÒ ¼ö ÀÖ´ÂÁö ±Ã±ÝÇÕ´Ï´Ù.
°è»ê ºÎŹµå¸³´Ï´Ù.
   

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