Objectives Control: Cooling towers Multizone vs. Single system

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Presentation transcript:

Objectives Control: Cooling towers Multizone vs. Single system VAV vs. CAV Cooling towers

Cooling towes Similarity and difference between Evaporative coolers and Cooing towers

Cooling Tower Similar to an evaporative cooler, but the purpose is often to cool water Widely used for heat rejection in HVAC systems Also used to reject industrial process heat

Cooling Tower

Solution Can get from Stevens diagram (page 272) Can also be used to determine Minimum water temperature Volume of tower required

Summary Heat rejection is often accomplished with devices that have direct contact between air and water Evaporative cooling Can construct analysis of these devices Requires parameters which need to be measured for a specific system