Objectives Discuss Project Topics Learn to design VAV

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

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VAV Example -One system -Multiple Spaces/Zones - VAV box for each space/zone http: //www. trane. com/commercial/library/vol 242/v 24 b 6. asp

VAV System Terms & Equations (you can find them in ASHRAE Standard 62) • Fraction of minimum outdoor air in space/zone supply air Xi = VOAi / VSAi • Critical space Space with maximum Xi , Z=max(Xi) • Fraction of outdoor air in system supply air X = sum(VOA ) / sum(VSA) • Required Fraction of outdoor air: Y=X/(1+X-Z)