full2010.pdf - page 1473

1435
(A)
Heat flux (kW/m2)
0 10 20 30 40 50 60
Heat transfer coefficient (kW/m
2K)
0
10
20
30
40
980
1963
2945
Mass flux : kg/m2s
Mulltiport minichannel
Dh = 1.2 mm,
Tcw,in = 15 oC
Thw,in = 30 oC
(a)
Heat flux (kW/m2 )
0 10 20 30 40 50 60
Heat transfer coefficient (kW/m
2K)
0
10
20
30
40
15
20
25
Cold water temperature : oC
Mulltiport minichannel
D h = 1.2 mm,
Mass flux = 1960 kg/m 2s
(b)
£µ¡š¸É 4. (a) ¨³ (b) „¦µ¢Â—Š‡ªµ¤´¤¡´ œ›r¦³®ªn µŠ¢¨´„Žr‡ªµ¤¦o°œ„´´¤ž¦³·š›·Í„µ¦™nµ¥Áš‡ªµ¤¦o°œ
£µ¡š¸É 4.(a) —Š‡n µ´¤ž¦³·š›·Í„µ¦™nµ¥Áš‡ªµ¤¦o°œÎµ®¦´ šn° œµ—Á¨È„®¨µ¥n°ŠšµŠš¸É °»–®£¼¤·œÊεÁ¥È œ
¨³œÊε¦o°œšµŠÁ oµÁšnµ„´ 15 oC ¨³ 30oC ˜µ¤¨Îµ—´ Ž¹ÉŠ‹³Á®ÈœÅ—oªnµ‡nµ‡nµ´ ¤ž¦³·š›·Í„µ¦™n µ¥Áš‡ªµ¤¦o°œ¤¸ ‡nµ
Á¡·É¤ ¹ÊœÁ¤ºÉ°¤¸„µ¦Á¡·É¤ž¦·¤µ–¢¨´„Žr‡ªµ¤¦o°œÂ¨³„µ¦Á¡·É¤°´˜¦µ„µ¦Å®¨ °Š¢¨´„Žr‡ªµ¤¦o°œš¸ÉÄ®o ¨³£µ¡š¸É 4.(b)
—Š‡n µ´¤ž¦³·š›·Í„µ¦™nµ¥Áš‡ªµ¤¦o°œÎµ®¦´ šn° œµ—Á¨È„®¨µ¥n°ŠšµŠš¸ÉÄ®o°´˜¦µ„µ¦Å®¨Ášnµ„´ 1960 kg/m2s
¡ªnµ‡nµ´ ¤ž¦³·š›·Í„µ¦™nµ¥Áš‡ªµ¤¦o °œ¤¸‡nµÁ¡·É¤ ¹Êœ˜µ¤‡nµž¦·¤µ–¢¨´„Žr‡ªµ¤¦o °œš¸ÉÁ¡·É¤ ¹Êœ Á¤ºÉ°Ä®o°»–®£¼¤·œÊεÁ¥È œ
¦·Áª–šµŠÁ oµš¸É ˜„˜nµŠ„´œ¡ªn µ‡nµ´¤ž¦³·š›·Í„µ¦™nµ¥Áš‡ªµ¤¦o°œ¤¸ÂœªÃœo¤„µ¦Á¡·É ¤ ¹ÊœÁ¤ºÉ°‡nµ‡ªµ¤Â˜„˜nµŠ °Š
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