full2010.pdf - page 1471

1433
avg wall avg oW
o T T
Q
h
, , ,
.
(6)
Á¤ºÉ ° avg oW T , , ‡º° °»–®£¼¤·ÁŒ¨¸É¥ °ŠœÊε¦o°œ (oC )
avg wall T , ‡º° °»–®£¼¤·ÁŒ¨¸É¥š¸ÉŸœ´Ššn° (oC )
×¥š¸É avg oW T , , ®µÅ—o‹µ„¤„µ¦
2
, ,
, ,
out hot in hot
avg oW
T T
T (7)
Á¤ºÉ ° in hot T , ‡º° °»–®£¼¤·œÊÎ µ¦o°œšµŠÁ oµ (oC )
out hot T , ‡º° °»–®£¼¤·œÊε¦o°œšµŠ°°„ (oC )
¨³ avg wall T , ®µÅ—o‹µ„¤„µ¦
N
T
T i
N
i
avg wall
1
,
¦ (8)
Á¤ºÉ ° Ti ‡º° °»–®£¼¤·Â˜n¨³‹»—š¸Éª´—Å—o¦·Áª–Ÿ·ªšn °Â˜n¨³‹»— (oC )
N ‡º° ‹Îµœªœ‹»—š´ÊŠ®¤—š¸É˜·—˜´ÊŠµ¥Áš°¦r 䇴žÁžd¨ª´—°»–®£¼¤·
宦´‡nµ LMTD ®µÅ—o‹µ„¤„µ¦
¸¸
¹
·
¨¨
©
§
'
'
' '
o
i
o i
T
T
T T
LMTD
ln
(9)
Á¤ºÉ ° i T ' ‡º° ‡ªµ¤Â˜„˜nµŠ °Š°»–®£¼¤·œÊε¦o°œÂ¨³œÊεÁ¥Èœ µÁ oµ ( oC )
o T ' ‡º° ‡ªµ¤Â˜„˜nµŠ °Š°»–®£¼¤·œÊε¦o°œÂ¨³œÊεÁ¥Èœ µ°°„ ( oC )