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A heat pump supplies 40 kW of heat to maintain the inside of a house at 25 degree C in cold winter months when the ambient temperature is 00C. Power required to operate the heat pump cycle is provided by a heat engine cycle which receives 10 kW of heat from a reservoir at 500 degree C. The heat engine has thermal efficiency of 50%. The heat engine rejects heat to the ambient reservoir at 00C.
a) Calculate the coefficient of performance of the heat pump.
b) Determine the net rate of heat transfer (kW) for the ambient reservoir.
the flow rate of liquid metal into the downsprue of a mold 1 ls. the cross-sectional area at the top of the sprue 800
An octave is defined as a doubling of the frequency. The claim is made that a low-pass Butterworth filter of order n has a roll-off (attenuation) of 6n dB/octave. Calculate the gain in dB for a second-order filter for the cut-off frequency itself, an..
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A 25-kg block of copper at at initial temperature of 150 C equilibrates with 0.79 kg of liquid water at an initial temperature of 20 C in an insulated tank. If the average specific heat of copper can be taken to be 0.395 kJ/kg.K, determine the final ..
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