Question

On a summer day at Muscat area, the typical average outdoor temperature is 35 degrees Celsius. For the indoor temperature of a house to be kept constant a temperature of 24 degrees Celsius, the rate of heat removal from the house by an air conditioning unit has to be $42 + \frac{Z}{2}$ kJ/s. (a) Determine the minimum work input to the unit in kW? (b) The maximum efficiency of the unit.

          On a summer day at Muscat area, the typical average outdoor temperature is 35 degrees Celsius. For the indoor temperature of a house to be kept constant a temperature of 24 degrees Celsius, the rate of heat removal from the house by an air conditioning unit has to be $42 + \frac{Z}{2}$ kJ/s.
(a) Determine the minimum work input to the unit in kW?
(b) The maximum efficiency of the unit.

On a summer day at Muscat area, the typical average outdoor temperature is 35 degrees Celsius. For the indoor temperature of a house to be kept constant a temperature of 24 degrees Celsius, the rate of heat removal from the house by an air conditioning unit has to be 42 + (Z)/(2) kJ/s.
(a) Determine the minimum work input to the unit in kW?
(b) The maximum efficiency of the unit.

Added by Christina C.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Khoobchandra Agrawal

03/04/2021

Step 1

This can be done using the formula: \[ \dot{Q} = U \times A \times (T_{out} - T_{in}) \] Where: - $\dot{Q}$ = heat transfer rate (kJ/s) - U = overall heat transfer coefficient (kJ/s-m2-°C) - A = surface area of the house (m2) - $T_{out}$ = outdoor Show more…

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On a summer day at Muscat area, the typical average outdoor temperature is 35 degrees Celsius. For the indoor temperature of a house to be kept constant a temperature of 24 degrees Celsius, the rate of heat removal from the house by an air conditioning unit has to be 68.5(kJ)/(s). (a) Determine the minimum work input to the unit in kW? (b) The maximum efficiency of the unit. On a summer day at Muscat area,the typical average outdoor temperature is 35 degrees Celsius.For the indoor temperature of a house to be kept constant a temperature of 24 degrees Celsius, the rate of heat removal from the house by an air conditioning unit has to be 42+(Z/2)kJ/s (a) Determine the minimum work input to the unit in kW? (bThe maximum efficiency of the unit