ME 405 Fall 2006 Professor John M. Cimbala Lecture 13 10/04/2006 Today, we will: •Do another example problem using flux chambers •Discuss empirical equations for emission ratesin Section 4.2•Do some example problems •Discuss evaporation and diffusionin Section 4.5ExampleGiven: Methane (CH4) is emitted from a 3 m ×1 m manure tank in a barn. A flux chamber is built on top of the tank to measure the emission rate. The following quantities are measured: Note: We drop the subscript jsince there is only one species of concern. •ca= 0.0020 mg/m3(ambient mass concentration of CH4in the barn) •Qa= 0.018 m3/s (bulk air flow rate into the flux chamber) •css= 0.15 mg/m
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