Assessemnt Calculation Flashcards
index of calculations:
Power losses: P = I(squared)R
Heat pumps: COP = Qh/W
QC + W = Qh
General power: P = E/T
Turbine power output: 0.5P x A x V(cubed)
Turbine swept area: Pi x R(squared)
Available power: Ke = 0.5MV(squared)
Velocity: V = I/T
Turbine mass: M1 = M2 x ((L1/L2)cubed)
Size of solar systems: ER = AEU x % of demand
ER = EM(squared) x N
N = ER/EM(squared)
Power generation: P = I x V
A heat pump has an input power of 1,800 W. A 500 W heat pump is used to heat a house. What is the amount of energy transferred to the house every second? Determine the COP of the heat pump.
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A heat pump operates at 750 W. The total power out of the system is 2,500 W. What is the power into the heat pump, and what if the COP of this system?
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A heat pump has a total output power of 3 kW. It has a rated COP of 3.5. Determine the electrical power required to run the pump.
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A heat pump has a COP of 2.75, and the electrical power required to run the pump is 1.25 kW. Determine the Power delivered to the house, and hence the power input at the cold reservoir.
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A heat pump has an input power of 1,600 W. A 400 W heat pump is used to heat a house. What is the amount of energy transferred to the house every second? Determine the COP of the heat pump.
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A heat pump operates at 450 W. The total power out of the system is 1750W. What is the power into the heat pump, and what if the COP of this system?
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A heat pump has a total output power of 5.5 kW. It has a rated COP of 2.25. Determine the electrical power required to run the pump.
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A heat pump has a COP of 4, and the electrical power required to run the pump is 3.75 kW. Determine the Power delivered to the house, and hence the power input at the cold reservoir.
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A heat pump has an input power of 2,000 W. A 450 W heat pump is used to heat a house. What is the amount of energy transferred to the house every second? Determine the COP of the heat pump.
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A heat pump operates at 825 W. The total power out of the system is 2700W. What is the power into the heat pump, and what if the COP of this system?
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A heat pump has a total output power of 12 kW. It has a rated COP of 4. Determine the electrical power required to run the pump.
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A heat pump has a COP of 2.75, and the electrical power required to run the pump is 4 kW. Determine the Power delivered to the house, and hence the power input at the cold reservoir.
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