In an experiment on a small oil-fired boiler, the steam is produced at 6 bar pressure, with dryness fraction 0.96. The 75 litres of water is converted into steam in 9.5 minutes. Then 10 litres of fuel oil with specific gravity 0.85 and calorific value 43125 kJ/kg is consumed in 11 minutes 25 seconds. The feed water temperature is 35°C. Determine the boiler efficiency and equivalent evaporation.

In an experiment on a small oil-fired boiler, the steam is produced at 6 bar pressure, with dryness fraction 0.96. The 75 litres of water is converted into steam in 9.5 minutes. Then 10 litres of fuel oil with specific gravity 0.85 and calorific value 43125 kJ/kg is consumed in 11 minutes 25 seconds. The feed water temperature is 35°C. Determine the boiler efficiency and equivalent evaporation.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Properties of Pure Substances

A substance with fixed chemical composition throughout is called a pure substance like water, air, and nitrogen. A pure substance does not have to be a single element or compound. A mixture of two or more phases of a pure substance is also a pure substance as long as the chemical composition is the same for all phases. These substances mainly have a constant/ uniform composition. The substances also have fixed boiling and melting points. A pure substance takes part in a chemical reaction to form predictable products.

Question

In an experiment on a small oil-fired boiler,
the steam is produced at 6 bar pressure, with dryness
fraction 0.96. The 75 litres of water is converted into steam
in 9.5 minutes. Then 10 litres of fuel oil with specific gravity
0.85 and calorific value 43125 kJ/kg is consumed in 11
minutes 25 seconds. The feed water temperature is 35°C.
Determine the boiler efficiency and equivalent evaporation.

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