Answer to Question #302208 in Thermal Power Engineering for Shanha

Question #302208

An inventor claims to have developed a heat engine that receives 700 kJ of heat from a source at 500 K and produces 300 I of net work. while rejecting the waste heat to a sink at 290 K. Is this reasonable claim?

1
Expert's answer
2022-02-28T11:09:21-0500

The maximum heat efficiency of the engine is the Carnot efficiency;

ηCarnot=1T2T1=1290500=0.42\eta_{Carnot}=1-\frac{T_2}{T_1}=1-\frac{290}{500}=0.42

Since efficiency is defined as;

η=workHeat\eta=\frac{work}{Heat}

0.42=W7000.42=\frac{W}{700}

W=294kJW=294kJ

Therefore it is impossible to have a work output greater than 294kJ and therefore the inventors claim is not reasonable.



Need a fast expert's response?

Submit order

and get a quick answer at the best price

for any assignment or question with DETAILED EXPLANATIONS!

Comments

No comments. Be the first!

Leave a comment

LATEST TUTORIALS
New on Blog