ASHRAE 90 1 The Big Picture

3,403 views

Published on

Jeff Boldt of KJWW presents ASHRAE 90.1, The Big Picture. Jeff is a member of the 90.1 Mechanical Sub-Committee. Presented at the 2008 ASHRAE Region VI CRC in Chicago, Illinois.
May 15, 16, 17

Published in: Design
  • Be the first to comment

ASHRAE 90 1 The Big Picture

  1. 1. ASHRAE/IESNA 90.1 The Big Picture
  2. 2. Presenter <ul><li>Jeffrey G. Boldt, PE, LEED ® AP </li></ul><ul><ul><li>Principal – KJWW Engineering </li></ul></ul><ul><ul><li>Member SSPC-90.1 Mechanical Committee </li></ul></ul><ul><ul><ul><li>Chair – Healthcare and Hydronic Working Groups </li></ul></ul></ul><ul><ul><li>Wisconsin Energy Conservation Code Council </li></ul></ul><ul><ul><li>WHEA Code Committee </li></ul></ul><ul><ul><li>Past President – Madison Chapter of ASHRAE </li></ul></ul><ul><ul><li>ASHRAE International Technology Award </li></ul></ul><ul><ul><li>Advanced Energy Design Guide - Healthcare </li></ul></ul><ul><ul><li>Ironman Canada </li></ul></ul><ul><ul><ul><ul><li>9:57 total – 3:28 marathon – Boston qualifier </li></ul></ul></ul></ul>
  3. 3. Learning Goals <ul><li>Scope & History of 90.1 </li></ul><ul><li>Politics </li></ul><ul><li>Who Decides the Content? </li></ul><ul><li>How Can You Influence 90.1? </li></ul><ul><li>What Will Change in 2007? </li></ul><ul><li>Hints for 2010 </li></ul>
  4. 4. Not Covered <ul><li>Details of what is in 90.1 </li></ul><ul><li>Design information </li></ul><ul><li>This is a BIG PICTURE discussion </li></ul><ul><ul><li>Only a few technical items </li></ul></ul>
  5. 5. ANSI/ASHRAE/IESNA Standard 90.1-2004
  6. 6. Scope <ul><li>ASHRAE/IESNA 90.1 – 2004(7) Energy Conservation Code for Buildings, Except Low-rise Residential Buildings </li></ul><ul><ul><li>Envelope </li></ul></ul><ul><ul><li>HVAC </li></ul></ul><ul><ul><li>Service Water Heating </li></ul></ul><ul><ul><li>Power & Lighting </li></ul></ul>
  7. 7. History – 1 <ul><li>1989 – Not code language. Contained requirements and design guidance. </li></ul><ul><li>1999 – Complete rewrite. Code language for adoption by AHJ </li></ul><ul><li>2001 –Incorporated 34 addenda published since 1999 edition issued. </li></ul>
  8. 8. History - 2 Issue 1989 1999+ Criteria Professional Judgment LCC Tradeoffs Equal Energy Consumption Equally Cost Effective (LCC)
  9. 9. ASHRAE Standard 90.1 Relative Stringency 0 0.2 0.4 0.6 0.8 1 1.2 Envelope Mechanical Lighting Building Technology Relative Stringency 1999 1989
  10. 10. 2004 Changes <ul><li>Lighting W/SF average 70% of 2001 </li></ul><ul><li>Some enthalpy recovery required </li></ul><ul><li>Fan power limits adjusted </li></ul><ul><li>Reheat limits clarified </li></ul><ul><li>Condenser heat recovery for hospitals </li></ul><ul><li>Waterside economizers for humidified buildings??? </li></ul>
  11. 11. Politics <ul><li>DOE </li></ul><ul><li>ICC </li></ul><ul><li>States </li></ul>
  12. 12. DOE Involvement <ul><li>EPAct 1992 - DOE mandated that all states have energy codes substantially equal to ASHRAE 90.1 </li></ul><ul><li>The Energy Conservation and Production Act provides that whenever the ANSI/ASHRAE/ IESNA Standard 90.1-1989, or any successor to that code is revised, the Secretary of Energy (Secretary) must determine whether the revised code would improve energy efficiency in commercial buildings. 42 U.S.C. 6833(b)(2)(A). </li></ul><ul><li>The quantitative analysis concluded that the1999 revision of the code would likely reduce the source energy consumption of new commercial buildings by approximately 5.9 percent. Site energy savings were estimated to be approximately 3.9 percent. </li></ul>
  13. 13. DOE Involvement - 2 <ul><li>DOE did not endorse 90.1-2001. DOE ruled that it did not conserve more energy. </li></ul><ul><li>2004 and 2007 are expected to have positive rulings </li></ul><ul><li>DOE challenged ASHRAE to make the 90.1-2010 use 30% less energy than 90.1-2004 </li></ul><ul><li>One or more bills have been proposed to Congress to allow DOE to supersede IECC in mandating energy codes. </li></ul>
  14. 15. Chair & Vice-Chairs Liaisons <ul><li>IESNA </li></ul><ul><li>TC 4.5 – Fenestration </li></ul><ul><li>TC 6.1 – Hydronics & Steam </li></ul><ul><li>TC 6.5 – Radiant & Convective </li></ul><ul><li>TC 7.6 – System Energy Use </li></ul><ul><li>TC 8.6 – Towers & Condensers </li></ul><ul><li>SPLS, CIS, ASHRAE </li></ul>EXCOM Subcommittee <ul><li>Chair & Vice-Chairs </li></ul><ul><li>Subcommittee Chairs </li></ul><ul><li>3 Consultants </li></ul>ECB Subcommittee Envelope Subcommittee Format & Compliance Subcommittee Lighting Subcommittee Mechanical Subcommittee Jeff Boldt, et al. AHRI, EEI + 19 AAMA, NFPA, NAIMA + 8 5 members BOMA +2 IALD + 9
  15. 16. Membership Levels <ul><li>Attend public meetings </li></ul><ul><li>Corresponding Member </li></ul><ul><li>Sub-committee Voting Member </li></ul><ul><ul><li>Control proposals that reach FC </li></ul></ul><ul><li>Full Committee Voting Member </li></ul><ul><ul><li>Control final document </li></ul></ul>
  16. 17. Committee Activity <ul><li>Monthly phone conference </li></ul><ul><li>Summer and Winter ASHRAE Meetings </li></ul><ul><li>2 annual interim meetings </li></ul><ul><li>Working Groups </li></ul><ul><li>Make proposals or leave committee </li></ul><ul><li>ANSI Process </li></ul><ul><ul><li>Respond to ALL proposals and comments </li></ul></ul>
  17. 18. Addenda <ul><li>Continuous Maintenance </li></ul><ul><li>Public review of all addenda </li></ul><ul><li>Proposer responsible </li></ul><ul><li>SI versions </li></ul><ul><li>Examples </li></ul><ul><ul><li>Radiant panel insulation </li></ul></ul><ul><ul><li>Pipe sizing </li></ul></ul><ul><ul><li>Calculate pump head </li></ul></ul>
  18. 19. How to Influence 90.1 <ul><li>Join the list server </li></ul><ul><li>Comment on proposals </li></ul><ul><li>Submit proposals </li></ul><ul><li>Send me suggestions – PLEASE!! </li></ul>
  19. 20. States - Example <ul><li>Wisconsin intends to adopt the 2006 International Energy Conservation Code </li></ul>
  20. 21. Why? <ul><li>The Wisconsin Energy Conservation Code Council (WECCC), reviewed the 2006 IECC </li></ul><ul><li>I asked to be a member of the WECCC: </li></ul><ul><ul><li>To look out for the healthcare industry </li></ul></ul><ul><ul><li>To avoid excessive amendments </li></ul></ul><ul><li>We did not recommend many amendments </li></ul>
  21. 22. Why Should I Care? <ul><li>The requirements are more strict </li></ul><ul><ul><li>The new IECC will save more energy, especially if you choose the ASHRAE option </li></ul></ul><ul><li>LEED 2.2 requires compliance with ASHRAE 90.1-2004, so in theory meeting the LEED requirements will meet the energy code </li></ul>
  22. 23. 90.1-2007 <ul><li>Incorporates addenda </li></ul><ul><li>Fan HP changes </li></ul><ul><ul><li>BHP </li></ul></ul><ul><ul><li>Filtration allowances </li></ul></ul><ul><ul><li>Lab allowances </li></ul></ul><ul><li>Closing loopholes </li></ul><ul><li>Efficiencies up </li></ul>
  23. 24. 90.1-2010 <ul><li>Intended to allow ≤ 70% of energy use allowed by 90.1-2004 </li></ul><ul><li>HVAC & Lighting are main targets </li></ul><ul><li>Ventilation and fan issues dominate HVAC </li></ul><ul><li>Suggestions????? </li></ul>
  24. 25. Learning Goals <ul><li>Scope & History of 90.1 </li></ul><ul><li>Politics </li></ul><ul><li>Who Decides the Content? </li></ul><ul><li>How Can You Influence 90.1? </li></ul><ul><li>What Will Change in 2007? </li></ul><ul><li>Hints for 2010 </li></ul>
  25. 26. <ul><li>Questions? </li></ul>
  26. 27. Technical Mandatory Provisions (required for most compliance options) Building System Compliance Options Energy Code Compliance Prescriptive Option Energy Cost Budget Trade Off Option Simplified Envelope HVAC Lighting SWH Power Other
  27. 28. Complex Systems <ul><li>100% air economizer or water economizer </li></ul><ul><li>No reheat, recooling, or mixing in multiple-zone systems unless: </li></ul><ul><ul><li>< 30% supply air </li></ul></ul><ul><ul><li>< 300 cfm , or </li></ul></ul><ul><ul><li>Room cfm equals the minimum OA required </li></ul></ul><ul><ul><li>Exceptions for pressure relationships & humidity needs </li></ul></ul><ul><ul><ul><li>Unclear whether most hospital areas are exempt </li></ul></ul></ul>
  28. 29. Service Water Heat Recovery (Complex #2) <ul><li>Condenser heat recovery required if </li></ul><ul><ul><li>24 hour operation, </li></ul></ul><ul><ul><li>> 6 MMBh of cooling heat rejection, and </li></ul></ul><ul><ul><li>> 1 MMBh of service water load </li></ul></ul><ul><li>Capacity of 60% of rejected heat or as needed to make 85F service water </li></ul><ul><li>Exception if condenser heat has other uses </li></ul>
  29. 30. Climate Mandatory Provisions Prescriptive Option Section 5.1.4 HVAC Lighting SWH HVAC Lighting SWH Envelope Envelope
  30. 31. Energy Cost Budget Method <ul><li>The ultimate trade-off method allowing you to trade-off across building systems through the use of annual, hourly simulation tools and a baseline building </li></ul><ul><li>The only real way to deal with unique designs, renewables, high-efficiency equipment, etc. </li></ul><ul><li>The basis of the energy portion of the LEED rating </li></ul><ul><li>Limits allowable energy costs of the design to those of a building meeting the Standard </li></ul><ul><li>Buildings must still meet all mandatory requirements (Section X.4) </li></ul>Mandatory Provisions Prescriptive Option Section 11 HVAC Lighting SWH HVAC Lighting SWH Envelope Envelope
  31. 32. Healthcare Impacts <ul><li>Why use 90.1-2007? </li></ul><ul><li>Provisions that are difficult to meet </li></ul><ul><ul><li>Condenser Water Heating (in IECC also) </li></ul></ul><ul><ul><li>Water Economizers (if required - exception for condenser water heating) </li></ul></ul><ul><ul><li>Fan Power Limitations (tough in healthcare) </li></ul></ul><ul><ul><li>Reheat Limitations (also in IECC) </li></ul></ul>
  32. 33. Why Use 90.1-2007? <ul><li>It will save more energy </li></ul><ul><li>It is required for LEED ® certification </li></ul><ul><li>It requires O&M, record drawings, etc within 90-days of completion </li></ul>
  33. 34. Thank You  <ul><li>Questions? </li></ul>
  34. 35. Steve’s Comments <ul><li>Overall – true </li></ul><ul><li>Fan power – series boxes count </li></ul><ul><li>Mandatory – Prescriptive – ECB </li></ul><ul><ul><li>Appendix G </li></ul></ul><ul><li>Pump power </li></ul><ul><ul><li>Limits are coming </li></ul></ul><ul><li>We can meet 30% - will you complain? </li></ul>

×