Determine the approximate amount of air to be handled and the quantity of make-up water required...

  

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Determine the approximate amount of air to be handled and the quantity of make-up water required by a cooling tower to cool 14 kg/s from 36C to 31C. Atmospheric conditions are 35C DB and 25C Assume that air leaves the tower at 32C DB and 90% RH. Properties of air entering the tower: h=80.38 kJ/kg and W=0.0177 kg/kg. Properties of air leaving the tower: h=102.0 kJ/kg and W=0.0274 kg/kg What is wrong with each of the following statements about the cooling tower? Correct it: Heat transfer in cooling towers occurs mainly by convection. Drift eliminators are fitted at the bottom of the cooling tower to maximise drift loss. Cooling tower capacity = Mass of circulating water X Specific heat of water Cp X Approach. Theoretically, the water cannot be cooled below the dry-bulb temperature of the induced airflow. Determine the approximate amount of air to be handled and the quantity of make-up water required by a cooling tower to cool 14 kg/s from 36C to 31C. Atmospheric conditions are 35C DB and 25C Assume that air leaves the tower at 32C DB and 90% RH. Properties of air entering the tower: h=80.38 kJ/kg and W=0.0177 kg/kg. Properties of air leaving the tower: h=102.0 kJ/kg and W=0.0274 kg/kg What is wrong with each of the following statements about the cooling tower? Correct it: Heat transfer in cooling towers occurs mainly by convection. Drift eliminators are fitted at the bottom of the cooling tower to maximise drift loss. Cooling tower capacity = Mass of circulating water X Specific heat of water Cp X Approach. Theoretically, the water cannot be cooled below the dry-bulb temperature of the induced airflow.