The formula for efficiency is this one:
Efficiency = Power Output / Power Input
Power Input is just equal to Rate of Energy input
= 44.4 MJ/kg * 5 kg/h
= 222 MJ/h
Take note that 1 hour = 3600seconds
= 222 MJ/h
= 222 MJ/3600s
= 0.061667 MW
J / S = Watts
Power input = 0.061667 MW = 61 667 W
Going back to formula:
Efficiency = Power Output / Power Input
28% = Power Output / 61667
Power Output = 0.28 * 61667
Power Output = 17266.76 W
Power Output ≈ 17 267 W
The power output is approximately 17, 267 W.
Rate of heat rejection = Power Input - Power Output
Rate of heat rejection = 61667 - 17267
Rate of heat rejection = 44400 W.
So the heat of rejection is 44,400 W.
