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Zt akml alan bir ift borulu s deitiricide i boruya 6 0 g / s ak hzyla 4 2 0 K ` de giren scak

Zt akml alan bir ift borulu s deitiricide i
boruya 60 g/s ak hzyla 420 K `de giren scak yan 320 K'e
soutulmas istenmektedir. Is deitiricinin d borusu ile i
borusu arasndaki bolukta ise ya ile ayn izgisel hzda
soutma suyu akmaktadr. Soutma suyu s deitiriciye 290
K`de girmektedir. Is deitiricinin i boru i ap 25 mm, d
boru i ap ise 40 mm dir. Isu deitiricinin boyunu
hesaplaynz. Ya taraf s aktarm katsays 1.6 kW/m' K, su
taraf s aktarm katsays ise 3.6 kW/m' K`dir. Yan ve
suyun younluklar srasyla 0.8 ve 1.0 g/em', yan ve suyun
zgl slar ise sirasyla 2.0 ve 4.2 kJkg K alnabilir. Duvar
etkileri ihmal edilebilir.
Ak kesit alan=(Pi)*D2/4

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