
Elements Of Electromagnetics
7th Edition
ISBN: 9780190698614
Author: Sadiku, Matthew N. O.
Publisher: Oxford University Press
expand_more
expand_more
format_list_bulleted
Question
An ideal Rankine cycle with reheat uses water as the working fluid. As shown in the figure below, the conditions at the inlet to the first turbine stage are 1600 lbf/in.2, 1200°F and the steam is reheated to a temperature of T3 = 800°F between the turbine stages at a pressure of p3 = p2 = 200 lbf/in.2

Transcribed Image Text:**Reheat Rankine Cycle Analysis**
For a condenser pressure of \( p_5 = p_4 = 1 \text{ lbf/in}^2 \), determine:
(a) The quality of the steam at the second-stage turbine exit.
(b) The cycle percent thermal efficiency.
**Diagram Explanation**
The provided diagram illustrates the arrangement and flow of a reheat Rankine cycle. Here's a step-by-step layout of each component and the flow of the working fluid:
1. **Steam Generator**: The steam generator produces high-pressure steam. At state 1, steam with pressure \( p_1 = 1600 \text{ lbf/in}^2 \) and temperature \( T_1 = 1200°F \) exits the steam generator.
2. **Turbine 1**: High-pressure steam enters the first turbine (Turbine 1) and expands, producing work \( \dot{W_t} \). This expansion decreases the pressure to \( p_2 \).
3. **Reheat Section**: The steam then enters a reheat section where it is reheated at constant pressure \( p_3 = p_2 \).
4. **Turbine 2**: The reheated steam enters the second turbine (Turbine 2), expands further, and produces additional work, lowering the pressure to \( p_4 \).
5. **Condenser**: Steam exits the second turbine and enters the condenser at state 4, where it’s condensed into a saturated liquid at pressure \( p_4 = 1 \text{ lbf/in}^2 \) and enthalpy \( x_5 = 0 \).
6. **Pump**: The condensed steam at state 5 is then pumped back to the steam generator at state 6 (at \( p_6 = p_1 \)), consuming work \( \dot{W_p} \).
**Requirements and Outputs**
1. **Determine the Quality of the Steam at the Second-Stage Turbine Exit**:
- You need to find the steam quality at the exit of Turbine 2, which is state 4 in the diagram.
2. **Calculate the Cycle Percent Thermal Efficiency**:
- To find the overall thermal efficiency of the cycle, which will involve the calculation of the net work done by the turbines and the heat added to the cycle.
**Parameters in Diagram:**
- \( p_
Expert Solution

This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution
Trending nowThis is a popular solution!
Step by stepSolved in 3 steps with 3 images

Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- An ideal Rankine cycle operates between the pressure limits of 6 bar and 0.1 bar with steam as the working fluid (data above). Saturated water leaves the condenser and the turbine inlet temperature is 250°C. You may assume that the work input to the boiler feed water pump is negligible. Estimate the efficiency of the cycle and determine the turbine power in kJ/kg.arrow_forwardT B A D Consider the cycle in the diagram (very similar to the Rankine Cycle) using water as the working fluid. Process A-B: A saturated mixture of water is pumped from low pressure to a high pressure saturated liquid in an iso-entropic (and adiabatic) process. Process B-C: The high pressure saturated liquid enters a boiler where it is heated at constant pressure process by an external heat source to a super-heated vapor. Process C-D: The super-heated vapor goes through a turbine, generating power exiting as a saturated vapor. Assume an iso-entropic (and adiabatic) process and neglect kinetic energy and potential energy changes. Process D-A: The saturated vapor then enters a condenser where it is condensed at a constant pressure process back to its original state. The boiler operates at 10 MPa (points B & C) and the condenser operates at 100 kPa (points A & D). Assume a mass flow rate of 1 kg/s. a) Make a table of the temperature, pressure, volume, internal energy, enthalpy, entropy…arrow_forwardAn ideal Rankine cycle with reheat uses water as the working fluid. As shown in the figure below, the conditions at the inlet to the firs turbine stage are 1600 lbf/in.², 1200°F and the steam is reheated to a temperature of T3 = 800°F between the turbine stages at a pressure of P3 = P2 = 200 lbf/in.² Oin Reheat section Steam generator 6 S P6=P₁=1600 lbf/in.² P3 = P2 T3 P1 = 1600 lbf/in.² T₁ = 1200°F Pump For a condenser pressure of p5 = P4 = 1 lbf/in.², determine: (a) the quality of the steam at the second-stage turbine exit. (b) the cycle percent thermal efficiency. P2 Turbine 1 Ps= P4 x = 0 (saturated liquid) Turbine 2 PA Condenser Qoutarrow_forward
arrow_back_ios
arrow_forward_ios
Recommended textbooks for you
- Elements Of ElectromagneticsMechanical EngineeringISBN:9780190698614Author:Sadiku, Matthew N. O.Publisher:Oxford University PressMechanics of Materials (10th Edition)Mechanical EngineeringISBN:9780134319650Author:Russell C. HibbelerPublisher:PEARSONThermodynamics: An Engineering ApproachMechanical EngineeringISBN:9781259822674Author:Yunus A. Cengel Dr., Michael A. BolesPublisher:McGraw-Hill Education
- Control Systems EngineeringMechanical EngineeringISBN:9781118170519Author:Norman S. NisePublisher:WILEYMechanics of Materials (MindTap Course List)Mechanical EngineeringISBN:9781337093347Author:Barry J. Goodno, James M. GerePublisher:Cengage LearningEngineering Mechanics: StaticsMechanical EngineeringISBN:9781118807330Author:James L. Meriam, L. G. Kraige, J. N. BoltonPublisher:WILEY

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