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Windseaker
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Homework Statement
Problem: A heat engine is connected to a 300watt motor. If we power the motor for 4hrs and heat engine is 40% efficient,how much heat is extracted from heat source in?
Homework Equations
Given: Q= heat QC=waste heat QH=W+QC and Power=E/t or Work/t
The Attempt at a Solution
This is a diagram equation of heat.QH-----l----->QC
l
l
V
300w
300W(3.412btu/1W)= 1023.6btu (4hr) = 4094.4 btuh
----- 4094.4btu(40%)=1637.8btuh