Example A steam power plant operates on the cycle shownbelow. If the adiabatic efficiency of theturbine is 87% and the adiabatic efficiency of the pumpis 85%. Determine.@ the thermal efficiency of the cycle.@ the net power output of the plant foroutput of the plant for mass flow rati = 15 kgSSolution* P=15.2 MPa, T=625°C (super)H₁ =16MPWp9KP38°C15.9KPa35°C4 +-1B | ₁ВP3P=15.2MPaT=625°CHC.BLOK POP=15M PaT = 600°CDWTP₂=10K Pa

Given data: adiabatic efficiency of the turbine is 87%adiabatic efficiency of the pump is 85%mss…

Answered: Example. A steam power plant operates…

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

See similar textbooks

Similar questions

A steady-flow system operating on the ideal Ericsson cycle can achieve the Carnot efficiency. One of the salient features of this cycle is the isothermal expansion through a heated turbine, as shown in Fig. a. Heat is added to the turbine such that the outlet temperature is equal to the inlet temperature, i.e. T₁=T₂, and the overall pressure ratio for this process is rₚ=P₁/P₂. However, an isothermal expansion through a heated turbine is very difficult to achieve in practical engineering applications. An alternate approach is two use a multi-stage expansion process with reheating. In this approach, the gas expansion process is carried out in multiple stages with reheating in between each stage. Consider the two-stage turbine expansion with reheating shown in Fig. b. The gas enters the first stage of the turbine at state A1, is expanded isentropically to an intermediate pressure Pₐ₂, is reheated at constant pressure to state B1, and is expanded in the second stage isentropically to the…
in a rankine cycle, what is the entrance pressure of the turbine if the condenser pressure is 105 kpa and the pump work is 20 kj/kg. use density of water entering the pump, 950 kg/m^3.
A Rankine Cycle operates at a throttle pressure and temperature of 5 MPa and 450°C, respectively. The generator produces 20 MW at an efficiency of 95% while the mechanical efficiency is 97%. The actual expansion efficiency of the turbine is 85% and the pressure of the condenser is 10 kPa. Determine the mass flow rate of steam in kg/s
Solve the MCQ Consider a simple ideal Rankine cycle with fixed turbine inlet conditions. What is the effect of lowering the condenser pressure on the steam quality at the turbine exit a. Incroase b. Decrease c. Remain the same 2. All radiations in a black body are a. Reflected b. Absorbed c. Transmitted 3. Overall heat transfer coefficient is used for heat transfer problems that include a. Radiation b. Convection c. Conduction and convection 4. A grey body is one whose absorptivity a. varies with temperature b. varies with wavelength of the incident radiation c. equal to its emissivity 5. In a heat exchange, doubling the mass flowrate of a fluid while leaving everything unchanged the temperature change of that fluid will a. decreases by 50% b. increase by 50% c. increases by 100% 6. If a heat exchanger LMTD is zero then heat transfer surface become a. Maximum b. Minimum c. Infinity 7. During stagnation process, kinetic energy of the fluid is converted to a. Enthalpy b. Entropy…
Air enters the compressor of a regenerative gas-turbine engine at 100 kPaand 300 K and is compressed to 800 kPa. The regenerator has aneffectiveness of 65 percent, and the air enters the turbine at 1200 K. For acompressor efficiency of 75 percent and a turbine efficiency of 86 percent,determine(a) The heat transfer in the regenerator.(b) The back work ratio.(c) The cycle thermal efficiency
For a Rankine cycle, increasing maximum temperature while holding all other parameters constant will allow an engineer to make the following statements Group of answer choices Quality at the turbine exit will decrease increasing liquid water content and causing turbine erosion. Quality at the turbine exit will increase and improve turbine durability. Increasing maximum temperature increases the average temperarture at which heat is added and will increase thermal efficiency Increasing maximum tempearture will decrease required mass flow rate for a specified power output.
Consider a heat engine is operating on a steady‐flow Carnot cycle with water asthe working fluid. The water mass flow rate in cycle is 0.5 kg/s. The cyclemaximum per minimum absolute temperatures ratio is 2.5. The quality of wateris 1 at the beginning of the heat‐rejection process and 0 at the end and theambient temperature is 35°C. Show the cycle on a T‐s and P‐v diagrams relativeto the saturation lines, and determine (a) the thermal efficiency, (b) thepressure at the turbine inlet, (c) maximum temperature, minimum pressure (d)the network output, (e) the entropy changes in all processes, and (f) the actualnetwork output with second law efficiency of 45%.
A Rankine Cycle operates at a throttle pressure and temperature of 5 MPa and 450°C, respectively. The generator produces 20 MW at an efficiency of 95% while the mechanical efficiency is 97%. The actual expansion efficiency of the turbine is 85% and the pressure of the condenser is 10 kPa. Determine the theoretical engine thermal efficiency in %.
A powerplant generates steam at a pressure of 8500 kPa and a temperature of 773 K, which is fed into a turbine. Exhaust from the turbine now enters the condenser at a pressure of 10 kPa, where it is condensed to saturated liquid, then pumped to the boiler. Determine now the, (a) thermal efficiency of a Rankine cycle at these conditions?(b) thermal efficiency of a practical cycle at these conditions if the turbine and pump efficiency are both 0.60?(c) If the rating of the power cycle of part (b) is 80 000 kW, what is the steam rate and what are the heat transfer rates in the boiler and condenser?
Write the expression for efficiency of a Rankine cycle in terms of Wturb, Wpump, Qin, Qout, and enthalpies. Thermodynamics question briefly explanation please
Pump work of Rankine cycle is 15 KJ/kg. Density of water entering the pump is 958 kg/m^3. If condenser pressure is 100 kpa, what pressure at the entrance of the turbine?
Q.3 A. Calculate the thermal efficiency of a Rankine cycle in which the steam is initially dry saturated at 2 Mpa and the condenser pressure 75 kN / 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 greater.

SEE MORE QUESTIONS

Recommended textbooks for you

Elements Of Electromagnetics

Mechanical Engineering

ISBN:

9780190698614

Author:

Sadiku, Matthew N. O.

Publisher:

Oxford University Press

Mechanics of Materials (10th Edition)

Mechanical Engineering

ISBN:

9780134319650

Author:

Russell C. Hibbeler

Publisher:

PEARSON

Thermodynamics: An Engineering Approach

Mechanical Engineering

ISBN:

9781259822674

Author:

Yunus A. Cengel Dr., Michael A. Boles

Publisher:

McGraw-Hill Education

Elements Of Electromagnetics

Mechanical Engineering

ISBN:

9780190698614

Author:

Sadiku, Matthew N. O.

Publisher:

Oxford University Press

Mechanics of Materials (10th Edition)

Mechanical Engineering

ISBN:

9780134319650

Author:

Russell C. Hibbeler

Publisher:

PEARSON

Thermodynamics: An Engineering Approach

Mechanical Engineering

ISBN:

9781259822674

Author:

Yunus A. Cengel Dr., Michael A. Boles

Publisher:

McGraw-Hill Education

Control Systems Engineering

Mechanical Engineering

ISBN:

9781118170519

Author:

Norman S. Nise

Publisher:

WILEY

Mechanics of Materials (MindTap Course List)

Mechanical Engineering

ISBN:

9781337093347

Author:

Barry J. Goodno, James M. Gere

Publisher:

Cengage Learning

Engineering Mechanics: Statics

Mechanical Engineering

ISBN:

9781118807330

Author:

James L. Meriam, L. G. Kraige, J. N. Bolton

Publisher:

WILEY

SEE MORE TEXTBOOKS