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

2. http://www.titus-hvac.com/ecatalog/subcategory.aspx?refid=37&subref=130 http://www.mestek.com/company-directory.asp#.U1_bi1dkW1c http://www.price-hvac.com/Catalog/Section_F1/CatalogData.aspx http://www.krueger-hvac.com/ http://www.trane.com/commercial/north-america/canada/en/products- systems/equipment/air-handlers/packaged-climate-changer-LPC.html http://www.johnsoncontrols.com/content/us/en/products/building_efficiency/product s-and- systems/integrated_hvac_systems/Industrial___Commercial_HVAC_Equipment/air side_products/york_custom_ahus.html http://www.lennoxcommercial.com/products/packaged-rooftop-units/ ……. Some HVAC equipment manufacturers

3. VAV Example http://www.trane.com/commercial/library/vol242/v24b6.asp -One system -Multiple Spaces/Zones - VAV box for each space/zone

4. 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)

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

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

7. DOAS System http://doas.psu.edu/

8. DOAS with multi-split systems Fresh air?

9. DOAS fresh air configurations