Homework Help is Here – Start Your Trial Now!
Engineering
Mechanical Engineering
1. A Rankine cycle works with a condenser pressure of 20kPa and a boiler pressure of 4000kPa. The water leaves the condenser saturated and is heated to 500°C in the boiler. The turbine works with an isentropic efficiency of 82% and has a work output of 35000kW. A natural-draft cooling tower is used to cool the water used to condense the steam in the condenser. Cooling water, enters the cooling tower at a temperature of 55°C and is required back in the condenser of the Rankine cycle at a temperature of 30°C. Air flow into the cooling tower. The design inlet air temperature and relative humidity is 25°C and 30% respectively. Under normal operating conditions the air flow is expected to leave the tower, with a temperature of 35°C at 70% saturation. Warm cooling water leaving the condenser and entering the cooling tower Turbine 6 Cold cooling water entering the condenser and leaving the cooling tower 7 Cold "dry' air entering the cooling tower 8 Hot wel' air leaving the cooling tower 9 Make-up water 1.1. Calculate the flow of steam in the Rankine cycle: m₁ %/ 1.2. Calculate the flow of cooling water through the condenser/cooling tower: mas */ Assume the mass flow of steam through the condenser mi = 3.5/ 1.3. Calculate the flow of air in the cooling tower. m. */ Assume the mass flow of cooling water through the tower mas = 75/ 1.4. Calculate the flow of make-up water needed: my*% Assume the mass flow of air through the tower m. = 90%/, Boiler

1. A Rankine cycle works with a condenser pressure of 20kPa and a boiler pressure of 4000kPa. The water leaves the condenser saturated and is heated to 500°C in the boiler. The turbine works with an isentropic efficiency of 82% and has a work output of 35000kW. A natural-draft cooling tower is used to cool the water used to condense the steam in the condenser. Cooling water, enters the cooling tower at a temperature of 55°C and is required back in the condenser of the Rankine cycle at a temperature of 30°C. Air flow into the cooling tower. The design inlet air temperature and relative humidity is 25°C and 30% respectively. Under normal operating conditions the air flow is expected to leave the tower, with a temperature of 35°C at 70% saturation. Warm cooling water leaving the condenser and entering the cooling tower Turbine 6 Cold cooling water entering the condenser and leaving the cooling tower 7 Cold "dry' air entering the cooling tower 8 Hot wel' air leaving the cooling tower 9 Make-up water 1.1. Calculate the flow of steam in the Rankine cycle: m₁ %/ 1.2. Calculate the flow of cooling water through the condenser/cooling tower: mas */ Assume the mass flow of steam through the condenser mi = 3.5/ 1.3. Calculate the flow of air in the cooling tower. m. */ Assume the mass flow of cooling water through the tower mas = 75/ 1.4. Calculate the flow of make-up water needed: my*% Assume the mass flow of air through the tower m. = 90%/, Boiler

Elements Of Electromagnetics
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
icon
Related questions
Question

7

1. A Rankine cycle works with a condenser pressure of 20kPa and a boiler pressure of 4000kPa. The water leaves the condenser saturated and is heated to 500°C in the boiler. The turbine works with an isentropic efficiency of 82% and has a work output of 35000kW. A natural-draft cooling tower is used to cool the water used to condense the steam in the condenser. Cooling water, enters the cooling tower at a temperature of 55°C and is required back in the condenser of the Rankine cycle at a temperature of 30°C. Air flow into the cooling tower. The design inlet air temperature and relative humidity is 25°C and 30% respectively. Under normal operating conditions the air flow is expected to leave the tower, with a temperature of 35°C at 70% saturation. 5 Warm cooling water leaving the condenser and entering the cooling tower Turbine 6 Cold cooling water entering the condenser and leaving the cooling tower Cold "dry air entering the cooling tower 7 8 Hot wet air leaving the cooling tower 9 Make-up water 1.1. Calculate the flow of steam in the Rankine cycle: mi *9/ 1.2. Calculate the flow of cooling water through the condenser/cooling tower: mas */. Assume the mass flow of steam through the condenser mi = 3.5/ 1.3. Calculate the flow of air in the cooling tower. ma Assume the mass flow of cooling water through the tower mws = 75/ 1.4. Calculate the flow of make-up water needed: my k Assume the mass flow of air through the tower m. = 90¹9/, Boiler
Transcribed Image Text:1. A Rankine cycle works with a condenser pressure of 20kPa and a boiler pressure of 4000kPa. The water leaves the condenser saturated and is heated to 500°C in the boiler. The turbine works with an isentropic efficiency of 82% and has a work output of 35000kW. A natural-draft cooling tower is used to cool the water used to condense the steam in the condenser. Cooling water, enters the cooling tower at a temperature of 55°C and is required back in the condenser of the Rankine cycle at a temperature of 30°C. Air flow into the cooling tower. The design inlet air temperature and relative humidity is 25°C and 30% respectively. Under normal operating conditions the air flow is expected to leave the tower, with a temperature of 35°C at 70% saturation. 5 Warm cooling water leaving the condenser and entering the cooling tower Turbine 6 Cold cooling water entering the condenser and leaving the cooling tower Cold "dry air entering the cooling tower 7 8 Hot wet air leaving the cooling tower 9 Make-up water 1.1. Calculate the flow of steam in the Rankine cycle: mi *9/ 1.2. Calculate the flow of cooling water through the condenser/cooling tower: mas */. Assume the mass flow of steam through the condenser mi = 3.5/ 1.3. Calculate the flow of air in the cooling tower. ma Assume the mass flow of cooling water through the tower mws = 75/ 1.4. Calculate the flow of make-up water needed: my k Assume the mass flow of air through the tower m. = 90¹9/, Boiler
Expert Solution
steps

Step by step

Solved in 6 steps with 6 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Basic Mechanics Problems
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.
Recommended textbooks for you
Elements Of Electromagnetics
Elements Of Electromagnetics
Mechanical Engineering
ISBN:
9780190698614
Author:
Sadiku, Matthew N. O.
Publisher:
Oxford University Press
Mechanics of Materials (10th Edition)
Mechanics of Materials (10th Edition)
Mechanical Engineering
ISBN:
9780134319650
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Thermodynamics: An Engineering Approach
Thermodynamics: An Engineering Approach
Mechanical Engineering
ISBN:
9781259822674
Author:
Yunus A. Cengel Dr., Michael A. Boles
Publisher:
McGraw-Hill Education
Control Systems Engineering
Control Systems Engineering
Mechanical Engineering
ISBN:
9781118170519
Author:
Norman S. Nise
Publisher:
WILEY
Mechanics of Materials (MindTap Course List)
Mechanics of Materials (MindTap Course List)
Mechanical Engineering
ISBN:
9781337093347
Author:
Barry J. Goodno, James M. Gere
Publisher:
Cengage Learning
Engineering Mechanics: Statics
Engineering Mechanics: Statics
Mechanical Engineering
ISBN:
9781118807330
Author:
James L. Meriam, L. G. Kraige, J. N. Bolton
Publisher:
WILEY
SEE MORE TEXTBOOKS