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8000 kW gcnde ve %30 termal verime sahip ana makinas olan bir gemide toplam atk snn %60i bacadan atlmaktadr. Egzoz gazndan 80 C scaklkta scak

8000 kW gcnde ve %30 termal verime sahip ana makinas olan bir gemide toplam atk snn %60i bacadan atlmaktadr. Egzoz gazndan 80 C scaklkta scak su elde edilmek istenmektedir. Kazana distile su 30 C scaklkta alnmaktadr. Ana makine egzoz gaz k scakl 600 C ve baca atmosfer k scakl 220 Cdir. Kazan alma dzeni 2 pas - 2 kademe levha ayrml olarak dnlmektedir. Gvde ap 150 cm, i boru ap 10mm, i boru et kalnl 2mm ve gvde boyu 3 metre olarak alndnda, a) Toplam s transfer miktarn bulunuz. b) Toplam s transfer katsaysn bulunuz. c) Kullanlacak boru adedini bulunuz. (2 pas = 1 boru) .

NOT: Tanm katsays hesaplarken gvde tarafndaki alan iin i borularn bloke ettii alan ihmal ediniz.

Cpsu=4.18 kJ/kg.K, Cphava=1.006 kJ/kg.K, kicboru=385 W/mK, ksu=0.65 W/mK, khava=0.026 W/mK, Prsu=6.7, Prhava=0.7, su=8,9 x 10-4, hava=1.85 x10-5 Pa.s, su=997 kg/m3, hava=1.25 kg/m3

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