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NARAGHI HALL 3 rd FLOOR VENTILATION MANAGEMENT IMPROVEMENT

NARAGHI HALL 3 rd FLOOR VENTILATION MANAGEMENT IMPROVEMENT BEST PRACTICE AWARD HVAC DESIGN/RETROFIT 2014 CALIFORNIA HIGHER EDUCATION SUSTAINABILITY CONFERENCE SAN DIEGO STATE UNIVERSITY. Geng Liu Energy Manager, CSU Stanislaus Brady Nations Regional Manager, Aircuity.

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NARAGHI HALL 3 rd FLOOR VENTILATION MANAGEMENT IMPROVEMENT

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  1. NARAGHI HALL 3rd FLOOR VENTILATION MANAGEMENT IMPROVEMENT BEST PRACTICE AWARD HVAC DESIGN/RETROFIT 2014 CALIFORNIA HIGHER EDUCATION SUSTAINABILITY CONFERENCE SAN DIEGO STATE UNIVERSITY • Geng Liu • Energy Manager, CSU Stanislaus • Brady Nations • Regional Manager, Aircuity

  2. Naraghi Hall of Science, 3rd floor lab spaces • Occupied 2007 • Third floor included special lab spaces • Designed for constant 10 ACH, 24/7

  3. Aircuity retrofit project objectives • Implement demand control ventilation • 13 lab areas • Implement new hood minimums based on ANSI Z9.5 • Minimum flow when hood closed • Cooling & Heating prevented reaching full Z9.5 min • 100 FPM Face velocity maintained in all cases • Convert constant volume EF w/ bypass dampers to VFD

  4. Bringing projects to reality • Identify Energy Saving Opportunities • Perform Feasibility Study • Project Fund Availability • Management successfully implements energy saving projects, and savings are put to work on additional future energy projects

  5. Results • Reduced Average airflow from 22,100 to13,900 CFM • EF speed reduction from Constant 60 Hz to Avg. ~40 Hz • Energy • 492,000 kWh • 14,213 Therms • All From ~ 16,000 Sq. Ft.

  6. Results: Additional benefits of Project • Reduced Noise Level-Indoor • Reduced Noise Level-Outdoor • Significantly reduced fire damper malfunctions & resulting pressure problems • Widened unoccupied temperature deadband

  7. Project Economics

  8. Understanding DCV Traditional approach: 10 ACH 24/7 Just in case there’s something there.

  9. Does this room need 10 ACH?

  10. Principle of DCV • Continuously measure for airborne contaminants • When present: VENTILATE at design levels • When not present: Use energy effective level

  11. Example of contaminant measurement

  12. Lab contaminant event

  13. The Aircuity System • Continuously monitors for airborne contaminants • TVOCs • Airborne Particulate • CO2 • CO • When presents “requests” additional ventilation • Always active • Not an override

  14. Typical Lab Design showing OptiNet OptiNet Sensor Suite Ventilation Controls General Exhaust Hood exhaust Supply Air OptiNet Sampling Point Fume Hood

  15. Sensor Suite (SST) • Houses the critical instruments • Located in an equipment room • All service work is done here.

  16. Questions?

  17. Thank you

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