Overview Of Chapter 8

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Overview Of Chapter 8

  1. 1. Overview of Chapter 8 Standard Gary Nelson Iain Walker Brett Dillon RESNET Conference 2011, Orlando FLMonday, March 14, 2011
  2. 2. Presenter Info • Gary Nelson • Iain Walker • Scientist • Brett Dillon • President • Lawrence • Chair, TC • The Energy Berkeley National • IBS Advisors, LLC Conservatory LaboratoryMonday, March 14, 2011
  3. 3. TC Litmus Test 1. Accuracy 2. Profitability 3. EasierMonday, March 14, 2011
  4. 4. Technical Committee Process • Work assigned to Performance Testing Subcommittee • Draft created & reviewed by full Technical Committee for comments • Technical Committee comments addressed by Subcommittee • 2nd version released for Technical Committee vote to go out for public comment • Sent to Board of Directors for vote to release for public comment • Public comments received • Public comments addressed by Subcommittee • Revised version sent to full Technical Committee for vote • If approved, sent to Standards Committee & then Board for approval • If not approved, sent back to Subcommittee for further revisionMonday, March 14, 2011
  5. 5. Chapter 8 Content • Infrared (already approved & released by Board of Directors), session 7, Wednesday Salon 7 • Combustion Safety & Work Scope (already approved & released by Board of Directors), session 8, Wednesday Salon 3 • Infiltration Testing • Duct Leakage Testing • Ventilation & Exhaust Flow Testing • Static Pressure Testing (to be done next)Monday, March 14, 2011
  6. 6. Infiltration • Standard Level of Accuracy • Reduced Level of Accuracy • Single Point Test • Multi-point Test • Repeated Single Point TestMonday, March 14, 2011
  7. 7. Standard Level of Accuracy • Baseline pressure < 5.0 Pa • Record indoor & outdoor temperatures within 10º F • Record altitude if > 5,000 ft above sea levelMonday, March 14, 2011
  8. 8. Reduced Level of Accuracy • Baseline pressure > 5.0 Pa, < 10 Pa • Record indoor & outdoor temperatures within 10º F • Record altitude if > 5,000 ft above sea level • Corrected CFM50 x extending factor (1 + (0.1 x (50 / induced building pressure)))Monday, March 14, 2011
  9. 9. Single Point Test • Baseline readings • ∆ 50 Pa • If above 5,000 feet or ∆ T > 30º F, CFM50 must be corrected • Altitude correction = 1 + (0.000006 x altitude) • Temperature correction found in table • Nominal CFM50 x altitude correction x temperature correction = corrected CFM50Monday, March 14, 2011
  10. 10. Multi-point Test • Baseline readings • ∆ 60 Pa • 7 additional readings between 15 Pa & 60 Pa, equally spaced • If uncertainty < 10%, Standard Level of Accuracy • If uncertainty > 10%, Reduced Level of AccuracyMonday, March 14, 2011
  11. 11. Monday, March 14, 2011
  12. 12. Repeated Single Point Test • Baseline readings • ∆ 50 Pa 5x • Performed 5 x • Average CFM50 readings • Average corrected CFM50 = average nominal CFM50 x altitude correction x temperature correctionMonday, March 14, 2011
  13. 13. Duct Leakage • Leakage to Outside • RESNET Standard • ASHRAE Std 152, Annex B • ASTM Std E-1554, Method A • ASTM Std E-1554, Method B • Total Leakage • RESNET Standard • ASHRAE Std 152, Annex CMonday, March 14, 2011
  14. 14. Air Handler Flow Measured airflow OR 400 cfm/ton A/C OR 400 cfm/ton Heat Pump OR 200 cfm/12,000 Btu/hr Furnace whichever is greatestMonday, March 14, 2011
  15. 15. Monday, March 14, 2011
  16. 16. Monday, March 14, 2011
  17. 17. Leakage to Outside • RESNET Std • 25 Pa • 1/2 supply, 1/2 return • ASHRAE Std 152, B • 25 Pa • 1/2 plenum pressure for supply & return individually • Separate supply & return • ASTM E-1554 “A” (Delta Q) • Normal operation • Separate supply & return • Not used for compliance • Enclosure leakage < 2500 CFM50 • ASTM E-1554 “B” • 25 Pa • 1/2 plenum pressure for supply & return individually • Separate supply & returnMonday, March 14, 2011
  18. 18. Total Leakage • RESNET Std • 25 Pa • 1/2 supply, 1/2 return • ASHRAE Std 152, C • 25 Pa • 1/2 plenum pressure OR 62.5 Pa • 1/2 supply, 1/2 return • 2.5% airhandler flow added if airhandler not present • 2.5% airhandler flow added if registers/grilles not presentMonday, March 14, 2011
  19. 19. Ventilation & Exhaust Flows •Powered Flow Hood •Air Flow Resistance •Garbage BagMonday, March 14, 2011
  20. 20. Monday, March 14, 2011
  21. 21. Dr. Iain Walker iswalker@lbl.gov Gary Nelson info@energyconservatory.com Brett Dillon info@ibsadvisorsllc.comMonday, March 14, 2011

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