subject
Engineering, 13.09.2019 19:30 keiolanibrooks

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).

ansver
Answers: 2

Other questions on the subject: Engineering

image
Engineering, 04.07.2019 18:10, heidiburgos1own6c0
Fluids at rest possess no flow energy. a)- true b)- false
Answers: 3
image
Engineering, 04.07.2019 18:10, lowkeyqueenk
Apipe with an outside diameter of 15 cm is exposed to an ambient air and surrounding temperature of -20°c. the pipe has an outer surface temperature of 65°c and an emissivity of 0.85. if the rate of heat loss from the pipe surface is 0.95 kw per meter of length, the external convective heat transfer coefficient (h) is: (a) 12.5 w/m"k (b) 18.6 w/mk (c) 23.7 w/mk (d) 27.9 w/mk (e) 33.5 w/mk
Answers: 1
image
Engineering, 04.07.2019 18:20, hayleymckee
Steam enters a converging nozzle at 3.0 mpa and 500°c with a at 1.8 mpa. for a nozzle exit area of 32 cm2, determine the exit velocity, mass flow rate, and exit mach number if the nozzle: negligible velocity, and it exits (a) is isentropic (b) has an efficiency of 94 percent
Answers: 2
image
Engineering, 04.07.2019 18:20, annette211pdd8v9
For a gate width of 2 m into the paper, determine the force required to hold the gate abc at its location.
Answers: 1
You know the right answer?
By removing energy by heat transfer from
aroom, a window air conditioner maintains the room at...

Questions in other subjects:

Konu
Mathematics, 24.07.2019 02:50