full2010.pdf - page 1463

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Reynold number ,Re
0 2000 4000 6000 8000 10000 12000 14000 16000
Friction factor,
f
0.00
0.02
0.04
0.06
0.08
0.10
0.12
0.14
0.16
22
30
40
Water temperature : oC
Copper tube
D = 8.25 mm
L = 1.2 m
£µ¡š¸É 2 —Š‡ªµ¤´¤¡´œ›r¦³®ªnµŠ Friction factor „´ Reynolds number
‹µ„£µ¡š¸É 2 š¸É—Š‡ªµ¤´¤¡´œ›r¦³®ªnµŠ Friction Factor „´ Reynolds number ‹³Á®ÈœÅ—oªnµÁ¤ºÉ°‡n µ
Reynolds number ¤¸‡nµ¼Š ¹Ê œ ‡nµÂ¢‡Á˜°¦r¦ŠÁ¸¥—šµœ„È‹³¨—¨Š ˜n Á¤ºÉ°‡nµ Reynolds number ¤¸ ‡nµÁ¡·É¤¼Š ¹Êœ¤µ„Ç
‡nµÂ¢‡Á˜°¦r¦ŠÁ¸ ¥—šµœ„È‹³¤¸ÂœªÃœo¤¼ Š ¹Êœ ¨³Á¤ºÉ°—¼‹µ„°» –®£¼¤·‹³Á®ÈœÅ—oªnµÁ¤ºÉ°‡n µ Reynolds number ¤¸‡nµ
œo°¥ÇŽ¹ÉŠÁž} œn ªŠ„µ¦Å®¨Â¦µÁ¦¸¥‡nµÂ¢‡Á˜°¦r¦ŠÁ¸¥—šµœ‹³¤¸ ‡nµÂ˜„˜nµŠ„´œš¸É°»–®£¼¤· ˜nµŠ„´ œ ˜nÁ¤ºÉ °‡nµ
Reynolds number ¤¸ ‡nµ¼ Š ¹ÊœŽ¹ÉŠÁž}œnªŠ„µ¦Å®¨Âž{~œžiªœ‹³Á®ÈœÅ—oªnµ°»–®£¼¤·Âš‹³Å¤n¤¸Ÿ¨„´‡nµÂ¢‡Á˜°¦r
¦ŠÁ¸¥—šµœ —´Šœ´Ê œÂ—ŠÄ®oÁ®Èœªnµ‡nµÂ¢‡Á˜°¦r ¦ŠÁ¸¥—šµœš¸ÉÁ„·— ¹Ê œ£µ¥Äœšn°š°ŠÂ—Š œµ—Á¨È „‹³ ¹Êœ°¥¼n„´
‡ªµ¤Á¦ÈªÂ¨³‡ªµ¤®œµÂœnœÄœ„µ¦Å®¨ °Š °ŠÅ®¨š¸ÉÅ®¨Ÿnµœšn°š°ŠÂ—Šœ´Êœ
Reynold number ,Re
0 2000 4000 6000 8000 10000 12000 14000 16000
Pressure drop (kPa)
0
2
4
6
8
10
12
22
30
40
Water temperature : oC
Copper tube
D = 8.25 mm
L = 1.2 m
£µ¡š¸É 3 —Š‡ªµ¤´¤¡´œ›r¦³®ªnµŠ Pressure drop ¨³ Reynolds number