358 A Text Book of Thermal Engineering Feed water temperaturç 12° C; Pressure of steam = 11 bar; Dryness fraction of steam - 0.95: Mass of coal burnt 300 kg/h , Calorific value of coal 32 000 kJ/kg of coal : Mass of water suppiied to boiler in 7 hrs 14 min 14 625 kg. %3D The mass ofw ster in the boiler at the end of the test was less than that at the commence ment by 900 kg. Calculate:L. Actual evaporation per kg of coal: 2. Equivalent evaporation from and at 100 C per kg [Ans. 7.15 kg; 8.33 kg: 58.75 %) of coal ; and 3. Thermal efficiency of the boiler.
358 A Text Book of Thermal Engineering Feed water temperaturç 12° C; Pressure of steam = 11 bar; Dryness fraction of steam - 0.95: Mass of coal burnt 300 kg/h , Calorific value of coal 32 000 kJ/kg of coal : Mass of water suppiied to boiler in 7 hrs 14 min 14 625 kg. %3D The mass ofw ster in the boiler at the end of the test was less than that at the commence ment by 900 kg. Calculate:L. Actual evaporation per kg of coal: 2. Equivalent evaporation from and at 100 C per kg [Ans. 7.15 kg; 8.33 kg: 58.75 %) of coal ; and 3. Thermal efficiency of the boiler.
Refrigeration and Air Conditioning Technology (MindTap Course List)
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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
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![6 In a boiler test, the following observations wcre made:
358
A Text Book of Thermal Engineering
Feed water temperaturç
e=
12" C; Pressure of steam = 11 bar; Dryness fraction of steam 095
Mass of coal burnt 300 kg/h, Calorific value of coal 32 000 kJkg of coal; Mass of water supplied to boiler
in 7 hrs 14 min= 14 625 kg.
The mass of w ster in the boiler at the end of the test was less than that at the commencement by
900kg. Calculate I. Actual evaporation per kg of coal: 2 Equivalent evaporation from and at 100 C per kg
[Ans. 7 15 kg, 8 33 kg: 58.75 %
of coal ; and 3. Thermal efficiency of the boiler](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F8da8b836-d153-4a1b-8f42-083656d20eb9%2Fe948248a-8baf-4cba-84b4-15ce0b40c1e3%2Fwskdf1h_processed.jpeg&w=3840&q=75)
Transcribed Image Text:6 In a boiler test, the following observations wcre made:
358
A Text Book of Thermal Engineering
Feed water temperaturç
e=
12" C; Pressure of steam = 11 bar; Dryness fraction of steam 095
Mass of coal burnt 300 kg/h, Calorific value of coal 32 000 kJkg of coal; Mass of water supplied to boiler
in 7 hrs 14 min= 14 625 kg.
The mass of w ster in the boiler at the end of the test was less than that at the commencement by
900kg. Calculate I. Actual evaporation per kg of coal: 2 Equivalent evaporation from and at 100 C per kg
[Ans. 7 15 kg, 8 33 kg: 58.75 %
of coal ; and 3. Thermal efficiency of the boiler
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