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
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
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![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](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fe284fd63-80d8-40c6-a382-ad10bfe73e9d%2F8d949aa3-31ac-4bb4-b429-1a0524248d30%2F97ltfo6_processed.jpeg&w=3840&q=75)
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
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