The temperature inside a kitchen freezer is a constant 256 K, while the temperature of the air in the kitchen is a constant 302 K. The freezer's insulation is imperfect, and it conducts energy into its interior at a rate of 0.150 W. Assuming the freezer can be approximated as ideal (operating in a Carnot cycle), what is the average power required by the freezer's motor to maintain the constant interior temperature? W

The temperature inside a kitchen freezer is a constant 256 K, while the temperature of the air in the kitchen is a constant 302 K. The freezer's insulation is imperfect, and it conducts energy into its interior at a rate of 0.150 W. Assuming the freezer can be approximated as ideal (operating in a Carnot cycle), what is the average power required by the freezer's motor to maintain the constant interior temperature? W

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

The power required to drive the compressor in a Carnot refrigerator is 48 hp. It operates between -6°C and 39°C. Determine the coefficient of performance.
The power required to drive the compressor in a Carnot refrigerator is 62 hp. It operates between -6°C and 45°C. Determine the coefficient of performance. Final answer must be in 3 decimal places.
Need solution to question 6 only within 20 minutes (answer of question 5 is 6.82m/s)
Determine the amount of heat added to a system if the following properties are given: mass flow rate=2.8 kg/s, z1=0 m, u1=23 kJ/kg, P1=15.2 kPa, v1=0.305 m3 /kg, z2=7 m, u2=18 kJ/kg, P2=10 kPa, v2=0.058 m3 /kg. A work of 287 kJ/kg is done on the system.
You are purchasing a refrigerator. You know that you want to keep your food at 1 deg C and that your house is typically at 19 deg C. What is the minimum power (kW) required to operate the refrigerator if the heat extracted is 297 kW?
Questions 3 and 4 refer to the following situation. Air flows into the duct of air-conditioner at 101 kPa and 12° C at a rate of 17 m³/min. The diameter of the duct is 26 cm and heat is transferred to the air in the duct by the air-conditioner at a rate of 3 W. 3. The speed (rounded to two decimal places) of the air as it enters the duct is equal to: (a) 6, 15 m/s (b) 4,87 m/s (c) 4,44 m/s (d) 5,34 m/s (e) 7,75 m/s 4. The temperature (rounded to two decimal places) of the air as it exits the duct is equal to: (a) 20,96° C (b) 20,35° C (c) 20,76° C (d) 20,83° C (e) 20,51° C
When a man returns to his well-sealed house on a summer day, he finds that the house is at 35°C. He turns on the air conditioner, which cools the entire house to 20°C in 36 min. If the COP of the air-conditioning system is 2.8, determine the power drawn by the air conditioner. Assume the entire mass within the house is equivalent to 800 kg of air for which cy= 0.72 kJ/kg °C and cp = 1.0 kJ/kg-°C. 35°C 20°C W A/C The power drawn by the air conditioner is kW.
A steam power plant has a high pressure of 2.5 MPa after release from the pump and it maintains 40°C in the condenser. The quality of the stream exiting the turbine is 80%. Solve for the work produced by the turbine and the pump, the heat transfer in the boiler, and heat removed by the condenser. (Answer in kJ/kg)
Q-3) A refrigerator which work on the principle of reversed Carnot cycle. Determine the power required to drive refrigerator between temperatures of 77°C and 7°C if heat at the rate of 7 kJ/s is extracted from the low temperature body