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¤ýÀÛ¼ºÀÏ 2001-02-06 (È­) 11:35
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Calibration of pressure loss in the cooling / hot water coils

³Ã, ¿Â¼ö ÄÚÀÏ »ç¿ë½Ã ¼öÃø¾Ð·Â¼Õ½ÇÀº Æ©ºê 1º»(PASS)´çÀÇ ¼ö·®°ú Æ©ºêÀÇ ±æÀÌ(À¯È¿Àå)À¸·ÎºÎÅÍ ±¸ÇÕ´Ï´Ù. The loss of the contraction pressure upon use of the cooling/hot water coils can be obtained from quantity of water in a single tube pass, and length of the tube (Effective Length).

* ³Ã°¢¿­·®(Calorific value for cooling) : 38,000(§»/h)
* ÄÚÀÏ»ç¾ç(Coil configuration) : 6ROW x 18passes x 0.95m
* ¼ö·®(Water quantity) : 38,000 ¡À (60 x 5) = 126.7(§¤/min)
  5 : ³Ã¡¤¿Â¼ö ÀÔÃⱸ ¿ÂµµÂ÷(5:difference in temperature between the inlet and the outlet of the cooling water/hot water)
* Æ©ºê 1º»´ç ¼ö·®(Water quantity in a single tube pass) : 126.7 ¡À 18 = 7.04(§¤/min)
* Æ©ºê ±æÀÌ°¡ 0.95mÀ̹ǷΠ¾Æ·¡ÀÇ µµÇ¥¿¡¼­ ¼ö¾Ð¼Õ½ÇÄ¡-0.15mmAq(Since length of the tube 0.95m, the water pressure loss in the following diagram is-0.15mmAq)
    ¼ö¾Ð¼Õ½ÇÄ¡-0.15mmAq
¡Å Àüü ¾Ð·Â¼Õ½Ç(Total pressure loss) = 0.15 x 6ROW = 0.9(mmAq)

¼ö·® (Water quantity) (§¤/min per pass)
°ü³»¼ö¼Ó (Water velocity in the tube) (m/s per pass)

ÁÖ) ÄÚÀϳ» ¼ö¼ÓÀº 0.5~1.5 m/sÀ̳»°¡ µÇµµ·Ï ¼±Á¤ÇÏ´Â °ÍÀÌ ÀûÇÕ ÇÕ´Ï´Ù.
(Note:The water velocity in the tube of 0.5~1.5 m/s is appropriate.)