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förmation: a. The work output per kilogram for the high- and low-pressure turbines b. The work input per kilogram for the high- and low-pressure pumps c. The heat transfer per kilogram in the boiler and the reheater Th kilogram in dencer

förmation: a. The work output per kilogram for the high- and low-pressure turbines b. The work input per kilogram for the high- and low-pressure pumps c. The heat transfer per kilogram in the boiler and the reheater Th kilogram in dencer

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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**Rankine Cycle with Reheat and Regeneration** The diagram illustrates a Rankine cycle featuring both reheat and regeneration processes. This cycle is often used in thermal power plants to improve overall efficiency. The outlined process includes several key components: a boiler, a reheater, a high-pressure turbine, a low-pressure turbine, an open feedwater heater, and two pumps (high-pressure and low-pressure). **States of the Water Through the Cycle:** 1. **Condenser (State 1 to 2):** - **Pressure (P1 = P8):** 15 kPa - **Quality (x1):** 0.0 - Water is at a saturated state, ready for pumping. 2. **Pump (State 2 to 3):** - **Pressure (P2 = P3 = P6):** 350 kPa - Water is pressurized by the pump and sent towards the open feedwater heater. 3. **Open Feedwater Heater (State 3):** - Water mixes with steam extracted from the turbines. 4. **High-Pressure Pump (State 3 to 4):** - Water is further pressurized to enter the boiler. 5. **Boiler (State 4 to 5):** - **Pressure (P4):** 3.0 MPa - Water is heated to a high temperature, becoming superheated steam. 6. **High-Pressure Turbine (State 5 to 6):** - **Pressure (P5):** 2.9 MPa - **Temperature (Ts):** 600°C - Steam expands, performing work, and is then reheated. 7. **Reheater (State 6 to 7):** - Steam is reheated to improve efficiency before entering the low-pressure turbine. 8. **Low-Pressure Turbine (State 7 to 8):** - Steam expands further, performing more work, then it is condensed back to water. **Efficiency and Performance Information:** - **Adiabatic efficiency of pumps:** 80% - **Adiabatic efficiency of turbines:** 85% **Tasks:** - Sketch the cycle on a T-s (Temperature-Entropy) diagram. - Determine the following: a. Work output per kilogram for the turbines. b. Work input per kilogram for the pumps
Transcribed Image Text:**Rankine Cycle with Reheat and Regeneration** The diagram illustrates a Rankine cycle featuring both reheat and regeneration processes. This cycle is often used in thermal power plants to improve overall efficiency. The outlined process includes several key components: a boiler, a reheater, a high-pressure turbine, a low-pressure turbine, an open feedwater heater, and two pumps (high-pressure and low-pressure). **States of the Water Through the Cycle:** 1. **Condenser (State 1 to 2):** - **Pressure (P1 = P8):** 15 kPa - **Quality (x1):** 0.0 - Water is at a saturated state, ready for pumping. 2. **Pump (State 2 to 3):** - **Pressure (P2 = P3 = P6):** 350 kPa - Water is pressurized by the pump and sent towards the open feedwater heater. 3. **Open Feedwater Heater (State 3):** - Water mixes with steam extracted from the turbines. 4. **High-Pressure Pump (State 3 to 4):** - Water is further pressurized to enter the boiler. 5. **Boiler (State 4 to 5):** - **Pressure (P4):** 3.0 MPa - Water is heated to a high temperature, becoming superheated steam. 6. **High-Pressure Turbine (State 5 to 6):** - **Pressure (P5):** 2.9 MPa - **Temperature (Ts):** 600°C - Steam expands, performing work, and is then reheated. 7. **Reheater (State 6 to 7):** - Steam is reheated to improve efficiency before entering the low-pressure turbine. 8. **Low-Pressure Turbine (State 7 to 8):** - Steam expands further, performing more work, then it is condensed back to water. **Efficiency and Performance Information:** - **Adiabatic efficiency of pumps:** 80% - **Adiabatic efficiency of turbines:** 85% **Tasks:** - Sketch the cycle on a T-s (Temperature-Entropy) diagram. - Determine the following: a. Work output per kilogram for the turbines. b. Work input per kilogram for the pumps
Expert Solution
Step 1

Given that 

P1 = P 8 =15 KPa

 P5 = 2.9 MPa              T5 = 600°C

P4 = 3.0 MPa 

P2 = P3, = P6 = P7, = 350 kPa , T7= 500°C

 

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