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Question: A heat pump with a COP (coefficient of performance) of 2.8 is used to heat an air-tight house. When running, the heat pump consumes 5 kW of power. If the temperature in the house is 7 degrees Celsius when the heat pump is turned on, how long will it take for the heat pump to raise the temperature of the house to 22 degrees Celsius? Is this answer realistic or optimistic? Explain. Assume the entire mass within the house (air, furniture, etc.) is equivalent to 1500 kg of air.
Calculating the mechanical properties of unidirectionally reinforced composites
To Verify the law for parallelogram of forces, law for triangle of forces and law of polygon of forces. These laws are very useful to calculate unknown forces in very short time.
Draw the block diagram of the uncontrolled seat Plot the open loop displacement response of the uncontrolled seat to a step input
A vapor-compression heat pump system uses R-134a as the working fluid. The refrigerant enters the compressor at 0.24 Mpa, 0 degrees Celsius, with a volumetric flow rate of 0.6m^3/min. The compression process is adiabatic to 0.9 MPa, 60 degrees Cel..
Question about Turbomachinery - Impulse & Reaction Turbines, An impulse air turbine rotor with a blade speed (U) of 300 m/s is measured to have a relative rotor inlet velocity (W_1) of 750 m/s at an angle of 69 degrees and an outlet relative veloc..
Air enters a 0.6 m diameter fan at 16 deg C, 101 kPa, and is discharged at 18 deg C, 105 kPa, with a volumetric flow rate of 0.35 m^3/s.
A power outage occurred at a water distribution pump station. Before the power outage the station was pumping with one pump at 6,000 gpm in a 18" diameter Steel Pipe
Refrigerant R-134a vapor in a piston-cylinder assembly undergoes a constant-pressure process from saturated vapor at 800 kPa to 50 ºC.
make a text file that contains what is your absolute path, and call it paths.txt
Carbon content of steel, A steel contains 55% alpha-ferrite and 45% gamma-ferrite or austenite at 750 degrees celcius. What is the carbon content of steel?
Determine heat flow, Heat flow through a uniform wall will: a) increase as the thermal resistance increases b) increase as the thickness of the wall increases
Effect of pressure on temperature and density of air for an adiabatic process, The pressure is to be raised from atmospheric to 7 psi (4.83 bar). The process is adiabatic, and the volume is constant and unknown.
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