# Water enters an ice machine at 55 F and leaves as ice at 25 F. If the COP of the ice machine is...

## Question:

Water enters an ice machine at 55{eq}^{\circ} {/eq}F and leaves as ice at 25{eq}^{\circ} {/eq}F. If the COP of the ice machine is 2.4 during this operation, determine the required power input for an ice production rate of 28 lbm/h. (169 Btu of energy needs to be removed from each lbm of water at 55{eq}^{\circ} {/eq}F to turn it into ice at 25{eq}^{\circ} {/eq}F.)

## COP of Refrigerator:

The coefficient of performance of the refrigerator becomes maximum when it operates on a reversible cycle. COP of a refrigerator is used to determine the rate of removal of heat from cold space by doing some input work to remove that heat.

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Given Data

• Temperature of water at inlet, {eq}{T_{water}} = 55^\circ {\rm{F}} {/eq}.
• Mass flow rate of water, {eq}\dot m =...

Types of Heating & Cooling Systems

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Chapter 10 / Lesson 9
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You can choose from a number of different heating and cooling systems to make your home comfortable to live in. Watch this video to learn about the advantages and disadvantages of forced air, radiant heat, baseboard heat and geothermal systems.