Physics for Scientists and Engineers
6th Edition
ISBN: 9781429281843
Author: Tipler
Publisher: MAC HIGHER
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Chapter 19, Problem 77P
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The power of the motor needed.
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The working temperatures in the condenser coil of a refrigerator is32oCand5kWof heat provided?infiltratesintothe freezer compartment. What is the minimum temperature that the freezer can be maintained if a power inputof 1.7 kW is Assume thatthe actual refrigerator has a COP of0.75 of the maximum.
What is the maximum possible coeffcient of performance of a heat pumpthat brings energy from outdoors at -10:00C into a 25C house?
A certain brand of freezer is advertised to use 730 kW . hof energy per year. (a) Assuming the freezer operates for 5 hours eachday, how much power does it require while operating? (b) If the freezerkeeps its interior at -5.0 C in a 20.0 C room, what is its theoreticalmaximum performance coefficient? (c) What is the theoretical maximumamount of ice this freezer could make in an hour, starting withwater at 20.0 C?
Chapter 19 Solutions
Physics for Scientists and Engineers
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