Chapter 5, Problem 5.26P

2. Find the thermal efficiency of a Carnot engine whose hot and cold bodies have temperatures of 154°C and 15°C respectively. (Ans. 32.55%)

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Please consider an actual heat engine that was taking in steam at 700 °FF and 400 psia at the rate of 1.0 lbm/sec. The engine was rejecting steam at 500 F and 100 psia. The engine's efficiency was 32 % of the Carnot efficiency. 4. a. Please determine the efficiency for a Carnot Engine that was operating between Tiand T. of the actual engine. b. Please determine the power output of the actual engine in hp.

5. A heat engine release heat into the cold reservoir at 500 K with a carnot efficiency of 25 %. What exhaust temperature will increase the carnot efficiency to 60 %?

What is the maximum efficiency of heat engine working between 1500K and 300K temperature. If such engine generates 320 kW of work after extracting 700 kJ/s heat from 1500K source, find the second law efficiency.

Suppose a certain heat engine has an efficiency of 35%. Heat in In order for this heat engine to do 420 J of useful work, how much energy must be taken in as heat from the high- temperature reservoir? 780 J Work 420 J 12 J 150 J 1620 J 1200 J Heat out O O O

For a power system operates with Wcycle = 810 BTU and Qout = 1769 BTU. What is the thermal efficiency?

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A heat engine with a thermal efficency of 45% rejects 500kJ/kg of heat. How much heat does it recieve?