8. A binary-vapour eycle operates on mercury and steam. Saturated mercury vapour at 4.5 bar is supplied to the mercury turbine, from which it exhaust at 0.04 bar. The mereury condenser generates saturated steam at 15 bar which is expanded in a steam turbine to 0.04 bar. (i) Find the overall efficiency of the cycle. (ii) If 50000 kg/h of steam flows through the steam turbine, what is the flow through the mercury turbine ? (iii) Assuming that all processes are reversible, what is the useful work done in the binary vapour eyele for the specified steam flow ? (in) If the ateam legving the mereury condenser is eunerheated to a temnerature of 300°C in a super

8. A binary-vapour eycle operates on mercury and steam. Saturated mercury vapour at 4.5 bar is supplied to the mercury turbine, from which it exhaust at 0.04 bar. The mereury condenser generates saturated steam at 15 bar which is expanded in a steam turbine to 0.04 bar. (i) Find the overall efficiency of the cycle. (ii) If 50000 kg/h of steam flows through the steam turbine, what is the flow through the mercury turbine ? (iii) Assuming that all processes are reversible, what is the useful work done in the binary vapour eyele for the specified steam flow ? (in) If the ateam legving the mereury condenser is eunerheated to a temnerature of 300°C in a super

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter3: Refrigeration And Refrigerants

Section: Chapter Questions

Problem 12RQ: The condensing pressure is 260 psig and the condenser outlet temperature is 108F for R-22. By how...

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The condensing pressure is 260 psig and the condenser outlet temperature is 108F for R-22. By how many degrees is the liquid subcooled in the condenser? A. 12F B. 42F C. 7F D. 14F
A. Calculate the thermal efficiency of a Rankine cycle in which the steam is initially dry saturated at 2 Mpa and the condenser pressure 7kN/m². Express this efficiency as a percentage of a Carnot cycle efficiency of the same limits of temperature. B. If the steam leaves the boiler at 350°C with the same pressure of the boiler and condenser given above. Explain why the Rankine efficiency in (A) is less than in (B), and why the ratio of efficiencies of the respective Rankine and Carnot is grater.
A. Calculate the thermal efficiency of a Rankine cycle in which the steam is initially dry saturated at 2 Mpa and the condenser pressure 7kN/m2 . Express this efficiency as a percentage of a Carnot cycle efficiency of the same limits of temperature. B. If the steam leaves the boiler at 3500C with the same pressure of the boiler and condenser given above. Explain why the Rankine efficiency in (A) is less than in (B), and why the ratio of efficiencies of the respective Rankine and Carnot is grater. Ans [ 88.3%, 49.9%]
a steam 8.0 MPa and 485 degree Celsius enters the turbine and expand at condenser pressure of 0.006 mpa for cycle and 1kg of steam. determine A.) heat added, B.) Wnet, C.) Thermal Efficiency. And for the engine, Determine the steam flow and the energy output of 40,000 Kw, E.) Wturbine, F.) Energy Chargable, G.) Ideal Heat rate
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(a) Steam is supplied, dry saturated at 40 bar to a turbine and the condenser pressure is 0.035 bar. If the plant operates on the Rankine cycle, calculate, per kilogram of steam: (i) the work output neglecting the feed-pump work; (ii) the work required for the feed pump: (iii) the heat transferred to the condenser cooling water, and the amount of cooling water required through the condenser if the temperature rise of the water is assumed to be 5.5 K; (iv) the heat supplied; (v) the Rankine efficiency; (vi) the specific steam consumption. (b) For the same steam conditions calculate the efficiency and the specific steam consumption for a Carnot cycle operating with wet steam. (C) Repeat Problem (a) for a steam supply condition of 40 bar and 350 °C and the same condenser pressure of 0.035 bar.