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Category > Applied Sciences Posted 16 May 2017 My Price 5.00

Water flows through a shower head steadily at a rate of 10 L/min

 

(a) Water flows through a shower head steadily at a rate of 10 L/min. An electric resistance heater placed in the water pipe heats the water from 16 to 43°C. Taking the density of water to be 1 kg/L, determine the electric power input to the heater, in kW, and the rate of entropy generation during this process, in kW/K.

(b) In an effort to conserve energy, it is proposed to pass the drained warm water at a temperature of 39°C through a heat exchanger to preheat the incoming cold water. If the heat exchanger has an effectiveness of 0.50 (that is, it recovers only half of the energy that can possibly be transferred from the drained water to incoming cold water), determine the electric power input required in this case and the reduction in the rate of entropy generation in the resistance heating section.

 

 

 
 

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Alpha Geek
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Status NEW Posted 16 May 2017 07:05 AM My Price 5.00

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file 1494921440-Answer.docx preview (177 words )
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