Objectives Learn about Fans Discuss Exam Final Project.

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Presentation transcript:

Objectives Learn about Fans Discuss Exam Final Project

Centrifugal fans

Axial Fans

Fan Laws “Approximate relationships” Given two aerodynamically similar fans, can extrapolate performance data Be very careful

Question How does fan power consumption vary with volumetric air flow rate?

Controlling Air Flow

Dampers

Effect on Fan Curve

VAV Operation

Summary of Air Distribution Systems Select diffuser based on ADPI Given a layout of duct system Calculate total pressure drop Identify fittings Deal with non-circular ducts Use fitting loss coefficient or equal length method Select the fan based on fan and duct curve

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