Commissioning for the 2015 IECC Code. Lunch & Learn Presentation O Connell Robertson - TEMA March 10, 2016

Transcription

1 Commissioning for the 2015 IECC Code Lunch & Learn Presentation O Connell Robertson - TEMA March 10, 2016

2 Learning Objectives Impact of Statewide Change from IECC 2009 to IECC 2015 At the end of this program, participants will be able to: Better informed about the history Understand what is driving the need for commissioning (Cx) The buildings and systems affected What is required, what is voluntary Better determine best method for Cx procurement Believe!

3 Why? A brief history. 1982

4 Why? A brief history ASHRAE convened a committee to Cx best practices

5 Why? A brief history ASHRAE convened a committee to Cx best practices ET released in summer

6 Why? A brief history ASHRAE convened a committee to Cx best practices ET released in summer Rocky fights Mr. T

7 Why? A brief history Rocky brings down the USSR by defeating Ivan Drago

8 Why? A brief history Rocky brings down the USSR by defeating Ivan Drago 1986 Reagan tells Gorbachev to tear down the wall

9 Why? A brief history Rocky brings down the USSR by defeating Ivan Drago 1986 Reagan tells Gorbachev to tear down the wall 1989 Berlin wall comes down

10 Why? A brief history Rocky brings down the USSR by defeating Ivan Drago 1986 Reagan tells Gorbachev to tear down the wall 1989 Berlin wall comes down You finally start to reconsider your mullet

11 Why? A brief history Rocky brings down the USSR by defeating Ivan Drago 1986 Reagan tells Gorbachev to tear down the wall 1989 Berlin wall comes down You finally start to reconsider your mullet ASHRAE publishes Guideline 0 The Commissioning Process

12 Why? A brief history. Guideline 0 Discusses the process but not specific systems Encourages implementing Cx at Pre-design Guideline is written around ensuring that the objectives laid out in the OPR are satisfied Cx continues into the occupancy period with surveys

13 Next stop: Code Implementation Over next 20+ years other Cx guidelines by: AABC ASHRAE 1.1 GSA NEBB BCxA ASHE In 2009 Cx is required: LEED 2009 Breaks Cx into mandated Fundamental (construction) & optional Enhanced (predesign) ASHRAE Cx of buildings over 50,000sf IECC 2012 Cx Required for Mech > 40T & Elec IECC 2015 Cx requirements expand to circ pumps

14 Why Energy Codes?

15 2009 IECC to 2015 IECC 2009 IECC April 1, Thick

16 2009 IECC to 2015 IECC 2015 IECC Nov. 1, Thick

17 2009 IECC to 2015 IECC Mechanical Min efficiency rise R5 to R6 indoor insulation Energy recovery on systems > 2500 cfm and >10% OA with smaller systems having higher allowable % OA Either waterside or airside economizers with few exceptions (DX<5T)

18 2009 IECC to 2015 IECC Controls 7-day programmable still allowed but additional features operations required not remotely accessible Economizer must be: 1.) fixed dry bulb, 2.) fixed enthalpy/dry bulb, or 3.) diff enthalpy and fixed dry bulb DCV for systems serving medium density (>25ppl/1000 SF) rooms over 500 SF CHW and HW loop temp resets. Variable speed pumping systems > 10HP Fans 7.5HP to vary speed. Low speed NMT 2/3 full speed.

19 2009 IECC to 2015 IECC Electrical Most spaces lights on occ sensor with few exceptions for emergency egress Increased daylighting responsive auto controls Additional Efficiency Six additional efficiency or controls options for Mechanical and Electrical (building must comply with 1) Plumbing Circ pumps to be automatically shut off on temp and demand

20 2009 IECC to 2015 IECC Commissioning (New requirement as of 2012 IECC) Required for buildings with cooling load over 40T Similar to 2012 IECC but with circ pumps added

21 Why Cx? Systems are getting more complex More energy recovery More economizers Controls schemes are more complex Cannot get there on raw efficiency increases Want to deliver energy only as much and where needed Commissioning can ensure the building operates as intended

22 Next stop: Owner Implementation Path 1: Allow contractor to select and mange May be better option if owner does not have manpower to support CxA efforts Required by code and likely to get minimum services

23 Next stop: Owner Implementation What is required? Registered professional provides evidence Cx HVAC (select systems only) TAB O&M Functional test lighting controls Sampling allowed for identical spaces Functional test circ pumps Cx Payback in New Buildings: 4.2 years Existing Buildings: 1.1 years

24 Next stop: Owner Implementation What not to expect when doing the minimum code required Cx. Plan & spec review of milestone design submittals (SD, DD, %CD) CxA support for writing OPR Specifications tailored to project Installation review(s) Submittal review(s) System trending Re-commissioning through warranty Continuous Commissioning Plan

25 Next stop: Owner Implementation Path 2: Owner Provided and/or Selected. Can add additional requirements CxA acts as an owner advocate CxA better understands owner s expectations Owner can make more informed contractor payments as job winds down Commissioning specifications better represent the work to be completed on the project O&M personnel may be better utilized

26 Next stop: Code Implementation Who can commission? Registered professional or approved agency for Mech & Plumbing For lighting, the registered design professional must provide evidence that systems were tested.

27 Examples VAV boxes simultaneously auto-calibrating Causing AHU to shut down on high static pressure Critical care AHU in a hospital

28 Examples Relief fan operating on economizer mode Setpoint as designed too close to non-economizer mode setpoint PID loop not tuned correctly

29 Examples

30 Examples

31 Questions & Answers Kyle Fisher, PE, CPMP: