3. A heat engine operating between a geothermal steam source at 205°C and a riv- er at 18°C achieves an efficiency of 22%. What percentage of its theoretical max- imum efficiency is it achieving?

Elements Of Electromagnetics
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ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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3. A heat engine operating between a geothermal steam source at 205°C and a riv-
er at 18°C achieves an efficiency of 22%. What percentage of its theoretical max-
imum efficiency is it achieving?
Transcribed Image Text:3. A heat engine operating between a geothermal steam source at 205°C and a riv- er at 18°C achieves an efficiency of 22%. What percentage of its theoretical max- imum efficiency is it achieving?
5. A certain engine is filled with gasoline that contains chemical energy n
when the engine is started, it begins transforming that chemical energy intes
mechanical energy. Over the course of a few seconds, the engine transforms
8,000J of chemical energy, but 4,000) of that energy is 'wasted' in the form of
thermal energy.
2 How much energy does the engine transform into useful mechanical
energy during these few seconds?
b. Calculate the efficiency of this engine.
Transcribed Image Text:5. A certain engine is filled with gasoline that contains chemical energy n when the engine is started, it begins transforming that chemical energy intes mechanical energy. Over the course of a few seconds, the engine transforms 8,000J of chemical energy, but 4,000) of that energy is 'wasted' in the form of thermal energy. 2 How much energy does the engine transform into useful mechanical energy during these few seconds? b. Calculate the efficiency of this engine.
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