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Objectives

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.

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Objectives

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  1. Objectives Learn about Fans Discuss • Exam • Final Project

  2. Centrifugal fans

  3. Axial Fans

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

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

  6. Controlling Air Flow

  7. Dampers

  8. Effect on Fan Curve

  9. VAV Operation

  10. 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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