The thermal effciency of a natural gas boiler versus air/fuel ratio is plotted in Fig. E19.2. Using

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The thermal effciency of a natural gas boiler versus air/fuel ratio is plotted in Fig. E19.2. Using physical arguments, explain why a maximum occurs.

Air-to-fuel stoichiometric ratio Figure E19.2 Thermal efficiency 2.

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Process Dynamics and Control

ISBN: 978-1119385561

4th edition

Authors: Dale E. Seborg, Thomas F. Edgar, Duncan A. Mellichamp, Francis J. Doyle

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