A steam power plant operates on the cycle shown in Fig. 10-5. If the isen- tropic efficiency of the turbine is 87 percent and the isentropic efficiency of the pump is 85 percent, determine (a) the thermal efficiency of the cycle and (b) the net power output of the plant for a mass flow rate of 15 kg/s.

A steam power plant operates on the cycle shown in Fig. 10-5. If the isen- tropic efficiency of the turbine is 87 percent and the isentropic efficiency of the pump is 85 percent, determine (a) the thermal efficiency of the cycle and (b) the net power output of the plant for a mass flow rate of 15 kg/s.

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 steam power plant operates on the cycle shown in Fig. 10-5. If the isen- tropic efficiency of the turbine is 87 percent and the isentropic efficiency of the pump is 85 percent, determine (a) the thermal efficiency of the cycle and (bi the net power output of the plant for a mass flow rate of 15 kg's. 15.9 MPa 15.2 MPa 35°C 625 C Boiler 1S MPa 600 C O 16 MPa Wihat Turbine = 087 Pump Of 10 kPa 9 AP 38°C Condenser
Task (4) Critically compare how the changes of the heat transfer efficiency will affect the lifetime of the turbine.
combined heat rate, and the total throttle flow for the rated power. (5)A steam power plant operates on the cycle shown in the figure. If the isentropic efficiency of the turbine is 87 percent and the isentropic efficiency of the pump is 85 percent, determine (a) the thermal efficiency of the cycle and (b) the net power output of the plant for a mass flow rate of 15 kg/s. 152 MP 625'C 15.9 MPa 35°C Boiler
an ideal Rankine cycle (fluid flow rate is 8 kg/s) operating between upper and lower pressures of 5 and 10,000 kPa. Draw a schematic of the components of this cycle. Draw the cycle on a P-v phase diagram and a T-s diagram. Find the power output of the turbine, the power input needed for the pump, and the overall cycle thermal efficiency.
10- A steam power plant with a power of 210 MW operates according to the simple ideal Rankine cycle. The steam enters the turbine at 10MPa pressure and 500 ºC and is cooled in the condenser at 10 kPa pressure. Calculate the mass flow of steam. A-164,7 kg/sB-96,3 kg/sC-35,4 kg/sD-65,8 kg/sE-154,9 kg/s (Note: This question is Turkish) orginal question: 210 MW gücünde bir buharlı güç santrali basit ideal Rankine çevrimine göre çalışmaktadır. Buhar türbine 10MPa basınç ve 500 ºC sıcaklıkta girmekte ve yoğuşturucuda 10 kPa basınçta soğutulmaktadır. Buharın kütlesel debisini hesaplayınız.
A:0£ I 26ll 4ll HMW-7.pdf > HMW-7: Steam Turbine Power Cycles Steam enters the turbine at 10 MN/m and 450°C. The steam expanded isentropically in the turbine down to the condenser pressure of 20 kN/m?. The power developed by the plant is 5600 kW. The condensate leaving the condenser is pumped to the boiler pressure isentropically. Taking into account the pump work and calculate: • The mass of steam generated in the boiler. • Cycle thermal efficiency. • Specific steam consumption. Draw the cycle on a T-s diagram. Hint: 1 MN/m² = 10 bar ...
A steam power plant operates on a Rankine cycle. Steam enters the turbine at 1,000 psia and 1,200 F and is cooled in the condenser at a pressure of 2 psia. The power out of the turbine is 5.0E8 Btu/hr and the mass flow rate of the steam going through the turbine is 262 Ibm/s. In the question that follows, select the answer that is closest to the true value. What is the enthalpy of the steam at the turbine exit in units of Btu/lbm? O 859 O 1090 O 976 O 759 O o o o
9-102C Consider a simple ideal Rankine cycle with fixed turbine inlet temperature and condenser pressure. What is the effect of increasing the boiler pressure on Pump work input: (a) increases, (b) decreases, (c) remains the same (a) increases, (b) decreases, (c) remains the same (a) increases, (b) decreases, (c) remains the same (a) increases, (b) decreases, (c) remains the same (a) increases, (b) decreases, (c) remains the same (a) increases, (b) decreases, (c) remains the same Turbine work output: Heat supplied: Heat rejected: Cycle efficiency: Moisture content at turbine exit:
Critically compare how heat transfer efficiency will affect the lifetime of the turbine.
A 330 MW steam power plant operates according to the simple ideal Rankine cycle. Water vapor enters the turbine at a pressure of 10 MPa and a temperature of 525 ° C and expands to a condenser pressure of 15 kPa. Show the cycle in a T-s diagram with the saturated liquid and saturated vapor curves and calcualte the; a)The degree of dryness of the steam at the turbine outlet. b)Thermal efficiency of the cycle. c)The mass flow of water vapor circulating in the cycle.
volume of the cylinder which would be required to accommodate the rapidly expanding steam at the lower pressures is not really justified when considering the small extra amount of work which is made available. The extra work is given by the area ABC on the P-V diagram. The cycle with early release is called the modified Rankine cycle. EXAMPLE 89 Steam is supplied from a boiler to a steam engine at a pressure of 1-1 MN/m2 and at a temperature of 250°C. It is expanded isentropically to a release pressure of 0-28 MN/m2. Its pressure then falls at constant volume to 35 kN/m2 at which pressure it is exhausted to a condenser. In the ndenser the steam is condensed to water with no undercooling and this water is then pumped back into the boiler. Determine:
A medium size power station is used to produce 30 MW net power for arefinery. The station uses steam as the operating fluid and operatesaccording to the Carnot cycle between the pressure limits of 0.4 bar and35 bar. Steam enters the boiler as a saturated liquid and leaves it as adry saturated vapour. (i) List the name of the four processes in a generic Carnot cycle andstate what type of energy transfer (work/heat) can be neglectedin each process. (ii) Determine the dryness fraction of the steam that is fed to thecondenser, and the specific enthalpy values at the four key points ofthe cycle. (iii) Calculate the specific heat provided to the boiler, the specificwork extracted from the power station and the mass flow rate ofthe steam circulating in the cycle, then, determine the thermal efficiency of the cycle.