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Adventures in Lab Ventilation

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Adventures in Lab Ventilation

  1. 1. Adventures in Lab Ventilation ROBIN IZZO ASSOCIATE DIRECTOR ENVIRONMENTAL HEALTH AND SAFETY PRINCETON UNIVERSITY
  2. 2. The Adventure Begins !! The Cast !! The Quest !! The Path !! The Obstacles !! The Discovery !! The Adventure Continues… !! Episode 2 !! Episode 3…
  3. 3. The Cast – On Location !! Office of Design and Construction !! Architects !! Planners !! Facilities Engineering !! Mechanical Engineers !! EHS !! Me !! The Users (Chemistry Department) !! Faculty !! Technical Staff !! Graduate Students
  4. 4. The Cast – Off-Site !! Main Architect !! Laboratory Designers !! Code Experts !! Code Administrators !! Engineering Consultants !! Commissioning Consultants !! Move Consultants !! Programming Consultants
  5. 5. The Quest FUNCTIONAL VENTILATION SYSTEM ENVIRONMENTAL SUSTAINABILITY FLEXIBILITY ENERGY SAVINGS RELIABILITY
  6. 6. The Path !! Pre-Programming Phase !! Types and number of labs, space needs, etc. !! Programming Phase !! Visits to colleges and universities "! Meet with users, maintenance staff, engineers "! EHS, Chemistry, ODC, Engineering, Consultants !! Sample hoods and other equipment "! 3 years, 7 hoods, 4 sash positioning systems "! Feedback from users, engineers and maintenance workers "! Studied energy usage !! Ask students and users what they like/dislike
  7. 7. The Obstacles ENERGY USAGE SAFETY VS. ENERGY SAVINGS MAINTENANCE
  8. 8. Teaching Labs !! A hood for every student !! !! Nearly 200 hoods in teaching labs !! Constant volume !! 60 fpm !! Glass, back to back "! Instructor can view work !! Three position control "! On, off, prep "! Key controlled by instructor "! On 15 hours a week at most !! One on permanently for storage, set-up, dilution ventilation
  9. 9. Research Hoods !! Another 200 !! Want 8-foot hoods !! Sash position !! Need to capture at full open !! Students don’t close sash !! Argue they need it open all the time !! Footpad study !! How long do they actively use hood?
  10. 10. The Discovery RATHER, THE SOLUTIONS, WE HOPE…
  11. 11. Usage
  12. 12. Energy Savings
  13. 13. Plans !! Low flow hoods !! 60 fpm at 24 inches !! Containment (tracer gas study) full open !! Automatic sash closers !! Not openers !! Timing is important !! Vertical sash only !! Occupancy sensors !! Status light !! Occupied, unoccupied, trouble !! Text messaging !! Purge
  14. 14. Choosing the Right Hoods
  15. 15. Plans !! ThermoFisher glass hoods for teaching labs !! 60 fpm at 18 inches, CV !! Waldner Secuflow hoods for research !! VAV – Siemens’ controls !! Pass ASHRAE at 24 inches !! Pass containment portion full open !! 75% Diversity Rate !! Ventilation System Commissioning !! Visited factories – ThermoFisher and Waldner !! ASHRAE – test 25% every quarter for two years !! Compare with EHS testing !! Modified test with live people
  16. 16. The Adventure Continues ANDLINGER CENTER FOR ENERGY AND THE ENVIRONMENT NEUROSCIENCE INSTITUTE COMPLETE VENTILATION SYSTEM RETROFITS
  17. 17. Andlinger Center for Energy and the Environment !! Original programming for one lab: !! Four 8 ft chemical hoods and 2 ducted biosafety cabinets !! Conversations with researchers " design change: !! Two 6 ft chemical hoods !! Two ducted enclosures !! One slot hood !! Two fume extractors !! One biosafety cabinet !! Results !! Cut thousands of cfm !! Lower first costs and operating costs !! More space in lab
  18. 18. Neuroscience Institute !! Vivaria !! AAALAC limitations on air change rate !! Ventilated cages !! Neuroscience research !! Not as chemical intensive !! Programming Stage !! Low Flow Hoods !! Active chemical monitoring !! Demand ventilation !! Computational flow !! Flow rate 6 occupied/3 unoccupied
  19. 19. Retrofits !! Energy studies !! Two most energy intensive and inefficient buildings "! LewisThomas Laboratory 1985 (Molecular Biology) "! Jadwin Laboratory 1968 (Physics) !! Cost-benefit of ventilation system upgrade "! Increase efficiency "! Decrease ventilation rates "! Demand control ventilation "! Lighting, etc. !! Payback less than 8 years !! Complete retrofit and recommissioning
  20. 20. New Normal for Labs !! Flexible use !! Multi-disciplinary !! Experimental today, computational tomorrow FLEXIBLE ! ONE SIZE FITS ALL !! Can design specifically and maintain flexibility
  21. 21. Decisions, Decisions !! Work with your design team !! Talk to the users !! Understand the applications and the risk !! Look beyond those applications !! Try the options on for size !! Installation, visits, meetings !! Design for flexible future
  22. 22. Not Just for New Labs… !! Are all hoods being used? !! Do you need so many? !! During annual testing, consider turning off or turning down !! Don’t be afraid to remove or move a hood !! Retrofit !! Try new stuff
  23. 23. Questions?

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