ir flow rate Water evaporation rate Makeup water rate Part B) ump power m a,o me mm Wp kg/s kg/s kg/s kW
Experiment: A cooling tower uses forced air and column packing to cool downward-flowing water. Inlet water temperature and water flow rate are varied to investigate effects on outlet water temperature, outlet air temperature, and outlet air humidity. The system is first observed operating with ambient room temperature water. A heat load is then applied to the water tank, and the system response is observed. This is to simulate a power plant starting up and placing a cooling load on the cooling water supply. The aim is to compare the system response with and without the load. Data from the Experiment and the make-up water mass flow rate are both shown in the following tables below.
- For the load cases, determine the net rate of water evaporation from the cooling water to the air using the equation for air flow rate. Compare this with the rate at which make-up water enters the system.
- For the load cases, determine the rate of work supplied by the pump and compare it to the pump power provided by the vendor, 100W. Discuss any discrepancies.
To determine the rate of air flow, evaporation and make up water and pump power
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