Q#04: Two Carnot engines A and B are operated in series. The first one A. receive heat at900 K and reject to a reservoir at temperature K. the second engine B receives the heatrejected by the first engine and in turn rejecets to a heat reservoir at 400 K. calculate thetemperature for the situation1. Work outputs of two engines are equal2. The efficiencies of the two engines are equal.

Given Data⇒Carnot engine operated in seriesFor first engine ATrecieved=900 KTrejected=KFor second…

Answered: Q#04: Two Carnot engines A and B are…

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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A gas turbine that has a 0.75 efficiency compressor that compresses up to 0.5 MPa, a combustion chamber where fuel of 45 MJ/kg is burned that gives a temperature output of 900 K, a 0.85 efficiency turbine that is responsible for moving the compressor, and another 0.8 efficiency turbine that generates the necessary net power, which can be varied from 0 to 200 kW with a throttle valve between the turbines. Calculate:1. Compressor outlet temperature2. Pressure and outlet temperature of the first turbine.
Suppose a heat engine absorbs 10.0 kJ of heat from a hightemperature source at Th = 450 K and discards heat to a lowtemperature reservoir at Tl=350 K. Calculate the thermodynamic efficiency, e, of conversion of heat to work; the amount of work performed, -wnet; and the amount of heat discharged at Tl , qCD.
q3
An open cycle gas turbine power plant Air is supplied to the compressor at 1 bar and 23°C. The air is compressed to a pressure of 5.5 bar and a maximum temperature of 700°C. The hot air expands. through the turbine to a pressure of 1 bar, assuming a standard air cycle. and compression and expanding according to the Eisentrowing process, calculate (a) power plant efficiency; and (b) the ratio between the work to drive the compressor and the work produced by the turbine
An engine works on the basis of Carnot cycle operating between temperatures of 800 K and 400 K. If the heat supplied is 100 kW, the output is
2. An otto engine has a clearance volume of 6%. It produces 300kw of power. Determine the amount of heat rejected.
4- An engineer has designed an efficient and economic engine to receive 500kJ of heat per cycle from a boiler at 652C and rejects heat to a river at 39C to maintain the environmental and health regulation. (a) What's the highest thermal efficiency level for this engine? (b) the amount of heat rejected to the river per cycle for case (a) to meet the public health, safety and environmental regulation.
n=5 here.
A heat engine is assumed to operate on a Carnot cycle. It receives 900kJheat from a high temperature reservoir at 550oC and rejects heat to a lowtemperature reservoir at 30oC.a. Calculate the thermal efficiency of the cycle.b. What is QH and QL?c. What is the net work produced by this cycle?d. Does this process violate Kelvin-Plank statement? Explain.e. An inventor claimed that he built a heat engine operating between the same reservoirs that give a thermal efficiency of 80%.Comments about his claim.f. Draw this process on a Ts diagram with proper labelling.g. If the cycle is reversed and operated as a heat pump, calculate itsperformance.
Question 6: A Carnot heat engine absorbs 2000 J of heat from the source of heat engine at 227° C and rejects 1200 J of heat during each cycle to sink. Calculate efficiency of engine temperature of sink and amount of work done during each cycle.
The working fluid used to operate an ideal Stirling engine is helium with temperature limits at 313K and 2100K and pressure limits of 120kPa and 5 MPa. If the mass of the working fluid is 0.15kg, find: the thermal efficiency of the cycle, the amount of heat transferred in the regenerator, and the work output per cycle.

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