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Q6: A fuel gas consisting of 90 mol % methane and 10 mol % nitrogen is burned with 25% excess air in a continuous water heater. Both fuel gas and air enter dry at 77 °F. Water is heated at a rate of 80 lbm/s from 77 F to 200°F. The flue gases leave the heater at 410°F. Of the entering methane, 70% burns to carbon dioxide and 30% burns to carbon monoxide. What volumetric flow rate of fuel gas is required if there are no heat losses to the surroundings?

Q6: A fuel gas consisting of 90 mol % methane and 10 mol % nitrogen is burned with 25% excess air in a continuous water heater. Both fuel gas and air enter dry at 77 °F. Water is heated at a rate of 80 lbm/s from 77 F to 200°F. The flue gases leave the heater at 410°F. Of the entering methane, 70% burns to carbon dioxide and 30% burns to carbon monoxide. What volumetric flow rate of fuel gas is required if there are no heat losses to the surroundings?

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Q6: A fuel gas consisting of 90 mol % methane and 10 mol% nitrogen is burned with 25% excess air in a continuous water heater. Both fuel gas and air enter dry at 77 °F. Water is heated at a rate of 80 lbm/s from 77 F to 200°F. The flue gases leave the heater at 410°F. Of the entering methane, 70% burns to carbon dioxide and 30% burns to carbon monoxide. What volumetric flow rate of fuel gas is required if there are no heat losses to the surroundings?
Transcribed Image Text:Q6: A fuel gas consisting of 90 mol % methane and 10 mol% nitrogen is burned with 25% excess air in a continuous water heater. Both fuel gas and air enter dry at 77 °F. Water is heated at a rate of 80 lbm/s from 77 F to 200°F. The flue gases leave the heater at 410°F. Of the entering methane, 70% burns to carbon dioxide and 30% burns to carbon monoxide. What volumetric flow rate of fuel gas is required if there are no heat losses to the surroundings?
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