A turbine in a thermal power plant takes steam from a boiler at 646 K and exhausts into a low temperature reservoir at 546 K.The efficiency of the turbine is
Correct answer: B. 15.3%.
- A. 8.4%.
- B. 15.3%.
- C. 18.3%.
- D. 84.5%.
Explanation
The efficiency of a turbine in a thermal power plant can be calculated using the Carnot efficiency formula, which is the maximum theoretical efficiency for a heat engine operating between two temperatures:Efficiency (η) = 1 - (T_cold / T_hot)Given: * Temperature of the hot reservoir (T_hot) = 646 K * Temperature of the cold reservoir (T_cold) = 546 KNow, let's calculate the efficiency:η = 1 - (546 K / 646 K)η = 1 - 0.84519η = 0.15481To express this as a percentage, multiply by 100:η = 0.15481 * 100 = 15.481%
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About First Law of Thermodynamics
The first law relates heat supplied, work done and the change in internal energy through energy conservation. Problems use sign conventions and apply the law to isothermal, adiabatic, isobaric and isochoric processes. Internal energy is a state function, while heat and work depend on the path followed.
Practise Thermodynamics
714 free Thermodynamics MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More First Law of Thermodynamics questions
Assume that a heat engine attains 100% efficiency. This assumption is made possible only if the output temperature is
Entropy can be described as the
If the temperature of the source of heat decreases while the temperature of the sink remains constant,then the efficiency of a carrot engine
The efficiency of Carnot Cycle depends upon the change in the
Which of the following is the CORRECT sequence of the working principle of Carnot engine?
The efficiency of a heat engine that operates between temperatures of 1500 K in the fire chamber and 600 K in the exhaust chamber is