Question

A heat pump is used in place of a furnace for heating a house. In winter,...

A heat pump is used in place of a furnace for heating a house. In winter, when outside air temperature is 15F, the heat loss from the house is 100,000 btu/h. The inside is maintained at 70F.
Find the Carnot COP, the minimum electric power required to operate the heat pump in kW, and the actual electric power to operate the heat pump with a COP of 3.
Engineering   Mechanical-Engineering   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A heat pump will be used to heat a building where the average outside temperature is...
A heat pump will be used to heat a building where the average outside temperature is -1 degrees. There is a constant 80000 kJ / h heat loss from the building and it is desired that the building interior temperature is 20 degrees. The minimum power requirement of the heat pump operating according to the Reverse Carnot cycle is 10 kilowatts. According to this;     a) Find the heating effect coefficient of the heat pump.     b) Since the unit...
A heat pump that supplies energy to a house at a rate of 8000 kJ/h for...
A heat pump that supplies energy to a house at a rate of 8000 kJ/h for each kW of electric power it draws. a. Determine the COP. (Points 7) b. Determine the rate of energy absorption from the outdoor air (MJ/h). (Points 8) Note: could you plz explain little about it rather than just solving it
A house is heated and maintained at 25oC by a heat pump. If the air is...
A house is heated and maintained at 25oC by a heat pump. If the air is extracted from outside atmosphere at 10oC, the maximum possible COP is most likely: a.) 8.51 b.) 19.87 c.) 4.58 d.) 11.92 Thermodynamics
A heat pump is used to keep a house warm at 22C. ∘C A. How much...
A heat pump is used to keep a house warm at 22C. ∘C A. How much work is required of the pump to deliver 2500 J of heat into the house if the outdoor temperature is 0∘C . Assume a COP of 3.0 B.How much work is required of the pump to deliver 2500 J of heat into the house if the outdoor temperature is -15∘C ? Assume a COP of 3.0 C. How much work is required of the...
A heat pump maintains a heated space at 22°C on a day when the outdoor air...
A heat pump maintains a heated space at 22°C on a day when the outdoor air temperature is 0 °C The heating requirement of the heat pump is 100,000 KJ/h, ad the power consumed by the pump is 5 KW. Calculate the heat extracted by the pump from the outside air in KJ/h. and determine the coefficient of performance of the heat pump.Calculate the maximum coefficient of performance for the heat pump.Does the heat pump above violates the 2nd law...
A heat pump is used to keep a house warm at 22∘C. How much work is...
A heat pump is used to keep a house warm at 22∘C. How much work is required of the pump to deliver 3000 J of heat into the house if the outdoor temperature is 0∘C. Assume a COP of 3.0 How much work is required of the pump to deliver 3000 J of heat into the house if the outdoor temperature is -15∘C? Assume a COP of 3.0 How much work is required of the pump to deliver 3000 J...
A geothermal heat pump is used in winter for space heating by getting heat from the...
A geothermal heat pump is used in winter for space heating by getting heat from the ground at 15 °C. The working fluid in the heat pump is R134a. The compressor inlet is at 400 kPa and the compressor exit is at 2 MPa and 60 C. The mass flow rate of the refrigerant is 0.1 kg / s and the temperature difference in the air flow in the condenser section is 12 C. The refrigerant is subcooled to 15...
A heat pump is used to keep a house warm at 22∘C. A) How much work...
A heat pump is used to keep a house warm at 22∘C. A) How much work is required of the pump to deliver 3200 J of heat into the house if the outdoor temperature is 0∘C. Assume a COP of 3.0 B) How much work is required of the pump to deliver 3200 J of heat into the house if the outdoor temperature is -15∘C? Assume a COP of 3.0 Express your answer to two significant figures and include the...
There is a heat pump that operates with R 134ª refrigerant, whose compressor has a power...
There is a heat pump that operates with R 134ª refrigerant, whose compressor has a power of 5 kW. The heat pump condenser is used to heat oil from a temperature of 0 degrees Celsius, up to a temperature of 20 ° C, so the condenser operates with a condensation temperature of 40 ° C. Furthermore, the evaporator operating with an evaporation temperature of 5 ° C, it is desired to use to air conditioning from a temperature of 35...
An ideal heat pump is used to maintain the inside of a house at 22◦C when...
An ideal heat pump is used to maintain the inside of a house at 22◦C when the outside temperature is Tout. Assume the pump does work at the rate of 1500W. The house loses heat by conduction (through walls, windows, etc.) at a rate given by (Tin − Tout) × 650W/ ◦C (a) For what outside temperature would the pump have to operate all the time in order to maintain the house at 22◦C? (b) If the outside temperature is...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT