Show transcribed data A coal used in a boiler contains 80% carbon, 10% hydrogen, 2% oxygen and 4% sulfur. There are 24% excess air needed for complete combustion. The supply air is at standard atmospheric condition at 24 degrees C. The boiler generates steam at superheat condition with a pressure of 8.0 mpa and temperature of 420 degrees C. The water is supplied to the boiler at 24 kg per minute with a temperature of 92.4 degrees C. Due to boiler age, it has only 92.4% efficiency. Compute the actual amount of air in m3/hr needed to burn the fuel if the feedwater losses 8% of its mass due to evaporation.

Show transcribed data A coal used in a boiler contains 80% carbon, 10% hydrogen, 2% oxygen and 4% sulfur. There are 24% excess air needed for complete combustion. The supply air is at standard atmospheric condition at 24 degrees C. The boiler generates steam at superheat condition with a pressure of 8.0 mpa and temperature of 420 degrees C. The water is supplied to the boiler at 24 kg per minute with a temperature of 92.4 degrees C. Due to boiler age, it has only 92.4% efficiency. Compute the actual amount of air in m3/hr needed to burn the fuel if the feedwater losses 8% of its mass due to evaporation.

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

Chapter36: Refrigeration Applied To Air-conditioning

Section: Chapter Questions

Problem 9RQ: What are higher-efficiency refrigerant blends that can be used as long-term replacements for R-22 in...

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