An electric resistance heating element with a length of 60 cm and a power rating of 1000 W, having a diameter of 0.4 cm, is placed into a 30 kg water container initially at 25°C. Assuming the container is perfectly insulated, calculate the time required for this heater to elevate the water temperature to 70°C Additionally, determine the minimum work input needed and the exergy destruction during this process, measured in Use a reference temperature of To = 25°C kilojoules (kJ)
An electric resistance heating element with a length of 60 cm and a power rating of 1000 W, having a diameter of 0.4 cm, is placed into a 30 kg water container initially at 25°C. Assuming the container is perfectly insulated, calculate the time required for this heater to elevate the water temperature to 70°C Additionally, determine the minimum work input needed and the exergy destruction during this process, measured in Use a reference temperature of To = 25°C kilojoules (kJ)
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
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Transcribed Image Text:An electric resistance heating element with a length of 60 cm and a power
rating of 1000 W, having a diameter of 0.4 cm, is placed into a 30 kg water
container initially at 25°C. Assuming the container is perfectly insulated,
calculate the time required for this heater to elevate the water temperature to
70°C
Additionally, determine the minimum work input needed
and the exergy destruction during this process, measured in
Use a reference temperature of To = 25°C
kilojoules (kJ)
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Step 1: To determine the time required for heater to elevate water temperature to 70°C
VIEWStep 2: Calculate the energy required to heat the water
VIEWStep 3: Calculate the time required for heater to elevate water temperature to 70°C
VIEWStep 4: Calculate the minimum work input
VIEWStep 5: Calculate the exergy destruction
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