Solution Found!
Consider a hollow-core printed circuit board 9 cm I high
Chapter 5, Problem 97P(choose chapter or problem)
Consider a hollow-core printed circuit board 9 cm I high and 18 cm long, dissipating a total of 15 W. The width of the air gap in the middle of the PCB is 0.25 cm. If the cooling air enters the 12-cm-wide core at 25°C and 1 atm at a rate of 0.8 L/s, determine the average temperature at which the air leaves the hollow core.
Questions & Answers
QUESTION: Problem 97P
Consider a hollow-core printed circuit board 9 cm I high and 18 cm long, dissipating a total of 15 W. The width of the air gap in the middle of the PCB is 0.25 cm. If the cooling air enters the 12-cm-wide core at 25°C and 1 atm at a rate of 0.8 L/s, determine the average temperature at which the air leaves the hollow core.
ANSWER:
Step 1 of 3
The equation for the density of air by ideal gas equation is as follows:
For , , and .