3) The evaporator section of a heat pump is installed in large tank of water, which...

 

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3) The evaporator section of a heat pump is installed in large tank of water, which is used as a heat source during the winter. As energy is extracted from the water, it begins to freeze, creating an ice/water bath at O°C, which may be used for air conditioning during the summer. Consider summer cooling conditions for which air is passed through an array of copper tubes, each of inside diameter d= 50 mm, submerged in the bath. If air enters each tube at a mean temperature of 24°C and a flow rate of m = 0.01 kg/s, what tube length, L, is needed to provide an exit temperature of Tmo =14°C? With 10 tubes passing through a tank of total volume V 10 m, which initially contains 80% ice by volume, how long would it take to completely melt the ice? The density and latent heat of fusion of ice are 920 kg/m' and 3.34 x 10° J/kg, respectively. 4) Resolve the class example with m = 1.2 kg/s and Ve= 5 m/s 3) The evaporator section of a heat pump is installed in large tank of water, which is used as a heat source during the winter. As energy is extracted from the water, it begins to freeze, creating an ice/water bath at O°C, which may be used for air conditioning during the summer. Consider summer cooling conditions for which air is passed through an array of copper tubes, each of inside diameter d= 50 mm, submerged in the bath. If air enters each tube at a mean temperature of 24°C and a flow rate of m = 0.01 kg/s, what tube length, L, is needed to provide an exit temperature of Tmo =14°C? With 10 tubes passing through a tank of total volume V 10 m, which initially contains 80% ice by volume, how long would it take to completely melt the ice? The density and latent heat of fusion of ice are 920 kg/m' and 3.34 x 10° J/kg, respectively. 4) Resolve the class example with m = 1.2 kg/s and Ve= 5 m/s

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