By removing energy by heat transfer from
aroom, a window air conditioner maintains the room at 22
degreecelcius on a day when the outside temperature is 32
degreecelcius.
a) determine, in kw per kw of cooling, the minimumtheoretical
power required by the air conditioner.
b) to achieve required rates of heat transfer withpractical
sized units, air conditioners typically recieve energy byheat
transfer at a temperature below that of the room being cooledand
discharge energy by heat transfer at a temperature above thatof the
surroundings. consider the effect of this bydetermining the minimum
theoretical power, in kw per kw of cooling, required when tc = 18
degree celcius and th= 36degree celcius, and compare with the value
found in part(a).