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Metan yakt bir kazan sisteminde (ak sistem) atmosferik hava ile yaklmaktadr. Bu sistemde yanma ortamna verilen hava iin HFK deeri 1.2 olmaktadr. Hava ile yaktn

Metan yakt bir kazan sisteminde (ak sistem) atmosferik hava ile yaklmaktadr. Bu sistemde yanma ortamna verilen hava iin HFK deeri 1.2 olmaktadr. Hava ile yaktn yanma ortamna giri scaklk deerleri 25 olmaktadr. Yanma kazan soutma suyu ile termal verim %60 olacak ekilde soutulmaktadr. Kazandan soutma suyuna birim zamanda transfer edilen s miktar 278 kW olduuna gre;

a-) Baca gazndaki su buharnn molar yzdesini hesaplaynz (10p).

b-) Kazann yakt tketim hzn (kg/s) hesaplaynz (20p).

c-) Baca gaz scakln hesaplaynz (30p).

Verilenler ve kabuller: MetanAID = 50000 kJ/kg HFK = Hava fazlalk katsays Sabit rejim kabul vardr. Tm reaksiyona giren trler ve reaksiyon rnleri mkemmel gazdr. rnler ierisinde su youmas yoktur.

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