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A heat pump with a coefficient of performance of 3.5 provides energy at an average rate of 70,000 kJ/h to maintain a building at 208C on a day when the outside temperature is 258C. If electricity costs 8.5 cents per kW ? h,
(a) Determine the actual operating cost and the minimum theoretical operating cost, each in $/day.
(b) Compare the results of part (a) with the cost of electrical- resistance heating.
how do i calculate the rate of change of heat with the cylinder, and the vertical temperature distribution along the cylinder's wall.
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