Practice problem 3 solution

Practice problem 3 solution - A boiler is burning methane...

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Unformatted text preview: A boiler is burning methane gas (CI-14) with 20% excess air to generate steam. The methane and combustion air enter the boiler at 25 C and the combustion gases leave at 150 C. Water comes in at 10 C, and leaves as steam at 130 C. How many kg of steam can be generated per kg of C02 emitted to the atmosphere? AHof, CH4, gas 2 -74.84 kamOl AH%, 002, gas 2 -393.51 kJ/mol AHUf, H20, gas: -241.83 kJ/mol AHOf, H20, liquid = -285.84 kJ/mol am oero @ oc = ZSOOkJ/kgK 2 0 fl Cp (for all gases and vapors): 30 J/mol.l<. Cp for H20 (liquid): 4.185 kJ/kg.K 3W :. 0.6?(fif/WW ~37 flleg—Wflz : @ [($006 ...
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