120912 ashrae 90.1 2010 updates

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120912 ashrae 90.1 2010 updates

  1. 1. Sharing our Guidance ASHRAE 90.1 2010 Updates
  2. 2. ASHRAE 90.1 2010 Updates Overview • Goal of 90.1-2010 was to have 30% energy savings compared to 2004. The 2007 update only accomplished a 5% savings from 2004. • In 2010 updates were made to the energy efficient design of: • Building envelopes • Mechanical Systems • Service Water Heating • Lighting Design • Electrical Power 08/06/13 2
  3. 3. ASHRAE 90.1 2010 Updates Building Envelope The following Addenda were made to building envelope requirements: •The vertical fenestration must meet the following requirement • Area South ≥ Area West and Area South ≥ Area East • Exceptions: storefront glazing, urban infill, shaded buildings •Minimum skylight fenestration area in enclosed spaces that are: • Applies to area that are 5,000 ft2 and greater with ceiling heights greater than 15 ft, and space types such as offices, lobbies, atriums, concourses, corridors, storage areas, gymnasium/exercise centers, convention centers, automotive service, manufacturing, non-refrigerated warehouses, retail spaces, distribution/sorting areas, transportation, or workshops. • The total skylight area shall be either; minimum of 3% of the roof area, or such that the daylight area under skylights will be a minimum of half the floor area and provide a minimum skylight effective aperture of at least 1%. • Exceptions: Climate zones 6 through 8, spaces with lighting power densities less than 0.5 W/ft2, and shaded spaces. •Maximum window to wall ratio was revised to 30% (from 40% in 2007). •Other miscellaneous envelope addenda: • “Cool roofs” in climate zones 1,2 and 3 • Increased envelop thermal requirements. 08/06/13 3
  4. 4. ASHRAE 90.1 2010 Updates Mechanical Systems • Equipment efficiency changes • Economizer requirements • Energy recovery requirements • Pipe Sizing– maximum flow rate for chilled water and condenser water piping 08/06/13 4
  5. 5. X ASHRAE 90.1 2010 Updates Mechanical Equipment Efficiency Changes Equipment Category Size 2007 Efficiency 2010 Efficiency Air Conditioners ≥65,000 btu/h < 135,000 btu/h 10.3 EER 11.2 EER (1.4 IEER) ≥135,000 btu/h < 240,000 btu/h 9.7 EER 11.0 EER (11.2 IEER) ≥240,000 Btu/h & <760,000 Btu/h 9.5 EER (9.7 IPLV) 10.0 EER (10.1 IEER) ≥760,000 Btu/h & 9.2 EER (9.4 IPLV) 9.7 EER (9.8 IEER) Heat Pumps ≥65,000 Btu/h & <135,000 Btu/h 9.9 EER 10.8 EER (11.0 IEER) ≥135,000 Btu/h & <240,000 Btu/h 9.1 EER 10.4 EER (10.5 IEER) ≥240,000 Btu/h 8.8 EER (9.0 IPLV) 9.3 EER (9.4 IEER) Air-Cooled Chillers <150 tons 9.56 EER (9.56 IPLV) 9.562 EER (12.5 IPLV) >150 tons 9.56 EER (9.56 IPLV) 9.562 EER (12.75 IPLV) 08/06/13 5
  6. 6. X ASHRAE 90.1 2010 Updates Economizer Requirements 08/06/13 6 • Per 90.1-2010 economizers are now required in all climate zones except 1a and 1b • 90.1-2010 reduces the size threshold for economizers
  7. 7. X ASHRAE 90.1 2010 Updates Energy Recovery Requirements 08/06/13 7 • Exhaust air energy recovery systems were previously only required on systems of more than 5,000 cfm and 70% outside air • Table 6.5.6 shows that energy recovery ventilation is now required in all humid climate zones, 1a through 6a, and cold climate zones 7 and 8.
  8. 8. X ASHRAE 90.1 2010 Updates Pipe and Pump Sizing 08/06/13 8 • New maximum allowable flows in nominal pipe sizes for chilled water and condenser water piping • Pump head calculations are now mandatory prior to sizing pumps. This is similar to the requirements for load calculations.
  9. 9. X ASHRAE 90.1 2010 Updates Other Miscellaneous Addenda 08/06/13 9 • BI-Pipe insulation • DI-Parking garage ventilation • AX-Kitchen hoods and make-up air • AT & CB-Damper leakage • CK-Ventilation optimization reset • AK-Pump pressure optimization • AS-Laboratory VAV or ERV required at lower threshold exhaust • H-Dual maximum VAV reheat damper position • AE-Requires insulation beneath radiant floor heating • BH-Supply air temperature reset • CQ-Increases duct sealing requirements • ….etc…. • 109 total addenda for the 90.1-2010 update
  10. 10. ASHRAE 90.1 2010 Updates CONCLUSION . . . Questions?

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