The manufacturer of the device claims that it accepts a heat transfer at a rate of QH = 3.0 kW from a low-grade source of geothermal heat at TH = 80ºC and rejects heat at rate QC to the atmosphere at TC = 20ºC. The device operates at steady state and produced work at a rate of W= 2.5 kW. There are no other heat or work transfers from the device.a.) What is the rate at which the device rejects heat to the atmosphere, QC ? b.) Is this device possible? Justify your answer using an entropy balance. Figure illustrates a device advertised on the internet for producing power.TH=80°CW = 2.5 kWQH = 3 kWDevice forproducing powerTc = 20°CQcFigure: Device for producing power.The manufacturer of the device claims that it accepts a heat transfer at a rate of Q = 3.0 kWfrom a low-grade source of geothermal heat at T = 80°C and rejects heat at rate to theatmosphere at Tc = 20°C. The device operates at steady state and produced work at a rate of W= 2.5 kW. There are no other heat or work transfers from the device.a.) What is the rate at which the device rejects heat to the atmosphere, Q?b.) Is this device possible? Justify your answer using an entropy balance.

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Answered: The manufacturer of the device claims…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

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The manufacturer of the device claims that it accepts a heat transfer at a rate of Q_H = 3.0 kW
from a low-grade source of geothermal heat at T_H = 80ºC and rejects heat at rate Q_C to the
atmosphere at T_C = 20ºC. The device operates at steady state and produced work at a rate of W
= 2.5 kW. There are no other heat or work transfers from the device.

a.) What is the rate at which the device rejects heat to the atmosphere, Q_C ?
b.) Is this device possible? Justify your answer using an entropy balance.

Figure illustrates a device advertised on the internet for producing power.
TH=80°C
W = 2.5 kW
QH = 3 kW
Device for
producing power
Tc = 20°C
Qc
Figure: Device for producing power.
The manufacturer of the device claims that it accepts a heat transfer at a rate of Q = 3.0 kW
from a low-grade source of geothermal heat at T = 80°C and rejects heat at rate to the
atmosphere at Tc = 20°C. The device operates at steady state and produced work at a rate of W
= 2.5 kW. There are no other heat or work transfers from the device.
a.) What is the rate at which the device rejects heat to the atmosphere, Q?
b.) Is this device possible? Justify your answer using an entropy balance.

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