4.A boiler uses coal for fueling a power plant. The heating value of coal is 74500 kJ per kg of fuel with 90% excess air. Determine: a. Theoretical air and fuel ratio b. Actual air and fuel ratio c. Mass of air if the boiler consumes 25lb/s of coal. d. Heat transfer in BTU if air enters at 16 deg. C and leaves at 70 deg. C e. Heat transfer in kilowatts if air enters at 16 deg. C and leaves at 70 deg. C

4.A boiler uses coal for fueling a power plant. The heating value of coal is 74500 kJ per kg of fuel with 90% excess air. Determine: a. Theoretical air and fuel ratio b. Actual air and fuel ratio c. Mass of air if the boiler consumes 25lb/s of coal. d. Heat transfer in BTU if air enters at 16 deg. C and leaves at 70 deg. C e. Heat transfer in kilowatts if air enters at 16 deg. C and leaves at 70 deg. C

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter50: Commercial, Packaged Rooftop, Variable Refrigerant Flow, And Variable Air Volume Systems

Section: Chapter Questions

Problem 3RQ: Mixed air is best described as the combination of A. exhaust air and return air. B. return air and...

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