What is the heat pumps heating coefficient of performance

Assignment Help Mechanical Engineering
Reference no: EM13718030

A heat pump is used to heat a home. It draws 3 kW of electrical power, and it extracts heat at a rate of 6 kW from the cold outdoor air.

A. At what rate does it add heat to the home?

B. What is the heat pump's heating coefficient of performance?

C. How long does it take to add 1 MJ of thermal energy to the home?

Reference no: EM13718030

Questions Cloud

The specific work of the compressor : An air compressor compresses air from 1 bar and 300 K to 5 bar and 540 K. The velocity at the inlet is 70 m/s and the velocity at the exit is 150 m/s. If To = 300 K and Po = 1bar.
Final state of water assuming the process to be adiabatic : A piston held by a pain in an insulated cylinder, contains 2 kg water at 100 degree C, quality 95%. The piston has a mass of 102 kg, with cross-sectional area of 100 cm^2, and the ambient pressure is 100 kPa. The pin is released, which allows the pis..
Water flows through a long tube of circular cross section : Water flows through a long tube of circular cross section at a mass flow rate of 0.01 kg/s. The heat flux through the wall is maintained uniformly at 3000 w/m^2. The water enters the tube at 20 C. The inside diameter is 7.5cm. Find the required lengt..
Determine the rate of heat rejection to the outside air : Determine the COP of a refrigerator that removes heat from the food compartment at a rate of 5040 kJ/ h for each kW of power it consumes. Also, determine the rate of heat rejection to the outside air.
What is the heat pumps heating coefficient of performance : A heat pump is used to heat a home. It draws 3 kW of electrical power, and it extracts heat at a rate of 6 kW from the cold outdoor air. At what rate does it add heat to the home? What is the heat pump's heating coefficient of performance?
What is the total pressure at the front of the beam : A river (of water) is flowing at a velocity of 1.2 m/s at 25 C. If a large beam is placed in the river to support a bridge, what is the total pressure at the front of the beam (the side facing upstream) in kPa at a depth of 2 m when the atmospheric p..
Hot combustion gases flow into a nozzle at low velocity : Hot combustion gases flow into a nozzle at low velocity with an enthalpy of 1,000 kJ/kg at a mass flow rate of 1 kg/s. At the nozzle exit, the enthalpy is reduced by a factor of 2. What is the thrust experienced by the nozzle as a result of the exhau..
Determine the cop ot the cycle and the total cooling load : An ideal vapor-compression refrigeration cycle uses r-134a as the working fluid is used to cool a brine solution to -5 C. This solution is pumped to various buildings for the purpose of air conditioning. The refrigerant evaporates at -10 C with a tot..
Parting line in injection molding : The parting line in injection molding is which one of the following: (a) the lines formed where polymer melt meets after flowing around a core in the mold, (b) the narrow gate sections where the parts are separated from the runner, (c) where the clam..

Reviews

Write a Review

Mechanical Engineering Questions & Answers

  The ratio of specific heats for the working fluid is ygema

a cycle consists of two isochoric and two isothermal process. the volume variation vmax vmin in the cycle is r fold

  Calibrated vibrometer output indicates a velocity amplitude

the waveform from a mechanical vibration is sensed by a velocity-sensitive vibrometer. the oscilloscope trace indicates

  Considering the ammonia as a system

A certain balloon is constructed of a material such that the pressure inside is related to the volume according to the relation PV^(-2/3)=constant. The balloon contains 2kg of ammonia initially at 0C, 60% quality. The balloon is now heated until the ..

  Boat a and boat b leave from point o the origin at the

boat a and boat b leave from point o the origin at the same time. boat a is traveling at 20 fts 30 degrees west of

  Water vapor enters a turbine operating at steady state at

water vapor enters a turbine operating at steady state at 30 mpa 600 oc and expands adiabatically to 6 mpa. if the

  The heat of melting for water is 155 btulbm assum that all

a 2-kg block of ice with an initial temperature of -20f is dropped into an insulated tank containing 10-kg of liquid

  A brayton cycle gas turbine delivers power to an electric

a brayton cycle gas turbine delivers power to an electric generator at 150 mw. the minimum nbsptemperature in the cycle

  Determine the magnitude of the radial component of force

the planar motion of a 0.5 kg particle is defined by the equations r6t2m and thetat rad where t is in seconds.

  Give a proposed design and analysisnbspprincipal features

give a proposed design and analysisnbspprincipal features and working principle of any mechanisms using diagrams to

  Steam enters an adiabatic turbine steadily at 7 mpa 500

steam enters an adiabatic turbine steadily at 7 mpa 500 degrees c and leaves at 100 kpa. if the mass flow rate is 6.2

  Logarithmic energy loss per collision

Based on the average, logarithmic energy loss per collision, approximately how many collisions must a neutron make with Fe-56 to slow from an energy of 1 MeV to 1 eV?

  Estimate extra cost per year due to increased use of blades

Current airbag regulations specify that they must only pass a test designed to protect a 175 pound male who is not wearing a seatbelt. There is currently a discussion of lowering the explosive force by 30%, so that smaller-sized people (including wom..

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd