Exhaust gases leave an internal combustion engine at 800deg C and 1 atmosphere, after having done 1050 kJ work per kg of gas in the engine (Cp of gas 1.1 kJ/kg K). The temperature of surrounding is 30 degrees C (i) How much available energy per kg of gas is lost by throwing away the exhaust Gases? (ii) What is the ratio of the lost available energy to the engine work ?

Exhaust gases leave an internal combustion engine at 800deg C and 1 atmosphere, after having done 1050 kJ work per kg of gas in the engine (Cp of gas 1.1 kJ/kg K). The temperature of surrounding is 30 degrees C (i) How much available energy per kg of gas is lost by throwing away the exhaust Gases? (ii) What is the ratio of the lost available energy to the engine work ?

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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Concept explainers

Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.

Question

Exhaust gases leave an internal combustion engine
at 800deg C and 1 atmosphere, after having done
1050 kJ work per kg of gas in the engine (Cp of gas
1.1 kJ/kg K). The temperature of surrounding is 30
degrees C
(i)
How much available energy per kg of gas is
lost by throwing away the exhaust Gases?
(ii)
What is the ratio of the lost available
energy to the engine work ?

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