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TeddyLu
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I'm having a hard time setting up an equation for a heat engine problem with one heat source and two heat sinks given only the temperature of the heat source and temperature of the two heat sinks as:
TH = 1000 K
TC1 = 200 K
TC2 = 300 K
It is given that the two heat rejected are of equal value.
determine the maximum thermal efficiency.
thermal efficiency (carnot) = 1 - TC/TH = 1 - QC/QH
Since there was two heat sinks with an equal value of heat rejected at each:
QC1 = QC2 = QC
therefore, QH = QC1 + QC2 will turn into
QH = 2QC
I took the entropy balance equation to solve for QC:
0 = QH/1000 - QC/200 - QC/300
but I don't have a constant on the other side to figure out for QC to plug back into find QH and then solve for thermal efficiency.
any help please?
TH = 1000 K
TC1 = 200 K
TC2 = 300 K
It is given that the two heat rejected are of equal value.
determine the maximum thermal efficiency.
Homework Equations
thermal efficiency (carnot) = 1 - TC/TH = 1 - QC/QH
The Attempt at a Solution
Since there was two heat sinks with an equal value of heat rejected at each:
QC1 = QC2 = QC
therefore, QH = QC1 + QC2 will turn into
QH = 2QC
I took the entropy balance equation to solve for QC:
0 = QH/1000 - QC/200 - QC/300
but I don't have a constant on the other side to figure out for QC to plug back into find QH and then solve for thermal efficiency.
any help please?