Q1:Show that the thermal efficiency of the Dual power cycle is:1Nth,Dual = 1-p(r.) - 1(r)"-1 [(r, – 1) + yr,(r. – 1)]P3where ris the pressure (explosion) ratio while r. = " is the cut-T2P2V3off ratio.IIII

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Answered: Show that the thermal efficiency of the…

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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In a Rankine cycle, the enthalpies at turbine entry and outlet are 3159 kJ/kg and 2187 kJ/kg. respectively If the specific purp work is 2 kJ/kg. What is the specific steam consumption (in kg/kWh) of the cycle based on net output ?
A binary vapor cycle has mercury and water as its working fluids. If the efficiency of the mercury cycle is 32% while the steam cycle is 32.7%, compute the overall efficiency of the binary vapor cycle in %.
2. The steam is generated from an ideal rankine cycle in throttle conditions of 6 MPa and a 450°C. Exhaust pressure is at 0.005 MPac a. Determine the Rankine cycle efficiency b. Determine the Carnot cycle efficiency with the same range of temperature.
A simple Rankine cycle works between the boiler pressure of 4 Mpa and condenser pressure of 30 bar. The steam is dry saturated before the throttling in the turbine. Determine the Rankine cycle efficiency.
6
A steam power plant operates between a boiler pressure of 52 bar and a condenser pressure of 0.045 bar. Calculate for these limits the cycle the work ratio for a Carnot cycle using wet steam.
A power plant operating on an ideal Rankine cycle has steam entering theturbine at 500°C and 2 MPa. If the steam enters the pump at 10 kPa, calculate the thermal efficiency with pump work included, the thermal efficiency neglecting pump work, and the percentage error in efficiency neglectingpump work.
Compare the thermal efficiency of a two-stage gas turbine with regeneration, reheating, and intercooling to that of a three-stage gas turbine with the same equipment when the maximum cycle temperature is 800°C.
Some cars have petrol engines and some cars have diesel engines, but no car ever uses a Carnot engine. Compare the the efficiency of the Diesel and Carnot cycle and explain the reason to opt for a Diesel cycle instead of a Carnot cycle.
Consider a simple ideal Rankine cycle. What happens when the condenser pressure is raised while keeping the turbine inlet state the same?

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