Objectives Discuss Project Topics Learn to design VAV and DOAS System.

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Presentation transcript:

Objectives Discuss Project Topics Learn to design VAV and DOAS System

systems/equipment/air-handlers/packaged-climate-changer-LPC.html s-and- systems/integrated_hvac_systems/Industrial___Commercial_HVAC_Equipment/air side_products/york_custom_ahus.html ……. Some HVAC equipment manufacturers

VAV Example -One system -Multiple Spaces/Zones - VAV box for each space/zone

VAV System Terms & Equations (you can find them in ASHRAE Standard 62) Fraction of minimum outdoor air in space/zone supply air X i = V OAi / V SAi Critical space Space with maximum X i, Z=max ( X i ) Fraction of outdoor air in system supply air X = sum(V OA ) / sum(V SA ) Required Fraction of outdoor air: Y=X/(1+X-Z)

Example Solution Space1Space 2Space 3Space 4 V SA V OA Xi X Z Y

Other Issues Related to VAV Fan control Minimum supply air Occupancy sensors

DOAS System

DOAS with multi-split systems Fresh air?

DOAS fresh air configurations

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