2015 Illinois Energy Code

Transcription

1 2015 Illinois Energy Code with 2018 IECC and ASHRAE Applications This program is funded by ComEd, Nicor Gas, Peoples Gas and North Shore Gas customers in compliance with Illinois law. 1

2 History of Illinois Energy Code 2001 Chicago s first-ever Energy Code 2003 Act requiring Energy Code for State Buildings (ASHRAE 90.1) 2004 Act requiring Energy Code for all Commercial Buildings (2001 IECC) 2006 Revision Most current version of IECC (2006 IECC) 2009 Revision Illinois first-ever Residential Energy Code (2009 IECC) IECC(ASHRAE ) effective January 1, IECC (ASHRAE ) effective January 1, ! 2018 IECC (ASHRAE ) likely effective March 22 nd, 2019 International Energy Conservation Consultants (708)

3 -orwww.epa.illinois.gov/topics/energy/index 3

4 Summary of Changes to International Energy Conservation Consultants (708)

5 Model Codes Historic Savings 6.7% IECC-R 2018 IECC-C % ASHRAE

6 Whole-Building Percent Savings vs IECC 6

7 Whole-Building Percent Savings vs International Energy Conservation Consultants (708)

8 Whole-Building Savings in Illinois vs International Energy Conservation Consultants (708)

9 ENVELOPE PROVISIONS 9

10 C Prescriptive R-value Method (No tradeoffs) C C Prescriptive U-factor Performance (Tradeoffs btwn components) C407 Total Building Performance (Annual energy cost < 85% of reference design) 401.2, No.1 ASHRAE 90.1 (Compliance alternative) 10

11 5.5 Prescriptive R-value Method (No tradeoffs) 5.6 U-factor Trade-off Option (Tradeoffs btwn components) 6.3, 6.4 Simple or Prescriptive Mechanical ( Two stories, <25,000 ft 2, Simple HVAC) 11 ECB (Annual energy cost comparison) Appendix G Performance Rating Method ASHRAE Appendix G is a compliance path.

12 ASHRAE Appendix G What does that mean? LEED v.4 [Minimum] Requirements Option 1. Whole-building energy simulation Option 2. Prescriptive compliance: ASHRAE 50% Advanced Energy Design Guide Demonstrate an improvement of 5% for new construction, in the proposed building performance rating compared with the baseline building performance rating. Calculate the baseline building performance according to ASHRAE , Appendix G, with errata (or a USGBC-approved equivalent standard for projects outside the U.S.), using a simulation model. Comply with mandatory and prescriptive provisions of ASHRAE , w/ errata. Comply with the HVAC and service water heating requirements, including equipment efficiency, economizers, ventilation, and ducts and dampers, in Chapter 4, Design Strategies and Recommendations by Climate Zone, for ASHRAE 50% Advanced Energy Design Guide: ASHRAE 50% AEDG for Small to Medium Office Buildings (< 100,000 ft 2 ); ASHRAE 50% AEDG for Medium to Large Box Retail Buildings (> 20,000 to 100,000 ft 2 ); ASHRAE 50% AEDG for K 12 School Buildings; or ASHRAE 50% AEDG for Large Hospitals (> 100,000 square feet) International Energy Conservation Consultants (708)

13 2018 IECC COMMERCIAL NEW Stuff! +4% improvement in Site EUI Increased allowable skylight area when daylighting; Modest SHGC reductions in Zones 4-5 to match ASHRAE ; All IECC designs must implement one additional efficiency measure: Install HVAC equipment +10% higher efficiency than IECC; Install lighting system -10% less LPD than IECC; Install enhanced digital lighting controls (cont. dimming, digitally addressable); Design for on-site renewable energy at least 0.5 W/ft 2 ; Install DOAS (Dedicated Outdoor Air System) with 100% OA Energy Recovery; Solar SWH or SWH with waste-heat recovery, or process CHP each w/ min 60% recovery; New! Enhanced envelope insulation values (-15% improvement to Total UA); or New! Reduced air infiltration (0.25 cfm/ ft 2 vs 0.40 cfm/ ft 2 at 75 Pa). Buildings 30% WWR TRADE-OFF daylight controls where -40% ILPA; Reduced Lighting Power Allowances interior, exterior and retail display; Total voltage drop in feeder and branch circuits (<5%) Section 4 (MECH) completely reorganized; Conditioned vestibules equipped with controls Various minor mechanical corrections & improvements. International Energy Conservation Consultants (708)

14 +6% improvement in Site EUI in Illinois Major formatting change for ease of use ; Climate Zone re-mapping (ref. to ASHRAE ); COMMERCIAL New Stuff! LEED Appendix G now an accepted code compliance path; U-factors/SHGC s reduced by as much as 22% and 12%, respectively; Whole building air leakage testing added as an alternative; Air barrier Cx (Commissioning) added via installation & verification ; Mechanical equipment replacement now subject to (controls, economizer, fan efficiency, compressor staging, boiler turndown provisions); HVAC controls for hotel/motel guest rooms improved; Reduced Lighting Power Allowances interior, exterior and retail display; Interior space-by-space reduced an avg. of -26% Exterior lighting reduced an avg. of -30% Retail display reduced an avg. of -25% Exterior and parking lighting occupancy sensing reduce -50%. International Energy Conservation Consultants (708)

15 ASHRAE 90.1 New Print Format , 278 pages Dual-column format No shading table rows Definitions normal font , 388 pages Single-column format Shaded table rows Definitions italicized International Energy Conservation Consultants (708)

16 International Energy Conservation Consultants (708)

17 ASHRAE Only New Climate Zones in accordance w/ ASHRAE Approximately 10% of U.S. Counties reassigned to a warmer climate zone. Energy use increases+0.18% country-wide due to less stringent insulation levels. 17

18 2018 IECC C Daylight responsive controls, TRADE OFF Daylight-responsive controls are required for buildings where: WWR 30% and Skylights 3% and space has 150W primary day-lit area; C UNLESS! The building CLP is -40% less than the code-required ICLPB 30% < WWR 40% and 2 stories, a min. of 50% of the floor area must be daylit; 30% < WWR 40% and > 3 stories, a min. of 25% of the floor area must be daylit; 3% < Skylight Area 6% provided that daylight controls installed in toplit zones. International Energy Conservation Consultants (708)

19 Defining SIDE-LIGHTED area 2015 IECC & 2018 IECC 128 w < 150 w 19

20 Defining SIDE-LIGHTED area ASHRAE & w > 150 w 20

21 ELECTRICAL LIGHTING & POWER PROVISIONS 21

22 ASHRAE 90.1 Only! Exorcise Energy Vampires with Automatic Receptacle Control International Energy Conservation Consultants (708)

23 Lighting International Energy Conservation Consultants (708)

24 IECC LPD tables

25 C Exterior Lighting Zones Exterior Lighting Zones 25 25

26 ASHRAE /16 Only Parking Garage Control Zones International Energy Conservation Consultants (708)

27 MECHANICAL & SWH PROVISIONS 27

28 2015 IECC COMMERCIAL NEW Stuff! All IECC designs must implement one additional efficiency measure: Install lighting system -10% less LPD than IECC; Install enhanced digital lighting controls (cont. dimming, digitally addressable, load shed); Install HVAC equipment +10% higher efficiency than IECC; Solar SWH or SWH with waste-heat recovery, or process CHP each w/ min 60% recovery; Install DOAS (Dedicated Outdoor Air System) with 100% OA Energy Recovery; or Design for on-site renewable energy at least 0.5 W/ft 2. Vestibule, Air-curtain exception HW boiler OA Tdb setback control (large office, school, hospital, large hotel) Reduces system size/outdoor air threshold where ERV required (± 8,000 hrs?) DX cooling economizer threshold increased to 54,000 Btuh (DX capacity limits) Economizer Fault Detection and Diagnostic (FDD) control required Multi-speed or variable speed fans for DX Cooling > 65,000 Btuh Modification to kitchen exhaust/make-up air (no more than 10% for compensating hoods) Air systems w/ Total Fan HP > 5, subject to fan power limitation calculation Fans > 5 HP to have fan efficiency grade (FEG) > 67 in accordance AMCA 205 Commercial cased/open refrigeration energy conservation measures International Energy Conservation Consultants (708)

29 NEW Stuff! No Additional efficiency measures. IECC requires for New! buildings No Vestibule air-curtain exception; New! Vestibule T-Stat control! HW boiler OA Tdb setback control (large office, school, hospital, large hotel) Reduces system size/outdoor air threshold where ERV required (± 8,000 hrs?) Clarity to static pressure sensor location and EMS setpoint reset DDC control required for three (3) common building situations Fractional horsepower motors 1/12 hp to be ECM (boxes and FCU s) DX cooling economizer threshold maintained 54,000 Btuh (DX capacity limits) New! Economizer Fault Detection and Diagnostic (FDD) control Multi-speed or variable speed fans for DX Cooling > 65,000 Btuh Air systems w/ Total Fan HP > 5, subject to fan power limitation calculation Fans > 5 HP to have fan efficiency grade (FEG) > 67 in accordance AMCA 205 Commercial cased/open refrigeration energy conservation measures International Energy Conservation Consultants (708)

30 Provisions Applicable to ALL Mechanical Systems C403.2 Mandatory Provisions 6.4 Mandatory Provisions Loads to ASHRAE/ACCA 183 Equipment sizing (140%, 115%) HVAC equipment efficiency System controls: Off-hour setback, shutdown Optimal start Economizer fault detection HW Boiler OAT db setback Demand Controlled Ventilation Enclosed parking structures Energy recovery ventilation Max net Kitchen exhaust MUA limitations (<10% for comp hoods) Duct insulation/sealing (R-8 or R-12) Piping insulation Air system design/control Fans > 5 hp must have FEG > 67 Heating outside building Refrigeration equipment efficiency Refrigerated warehouse/coolerfreezer Commissioning (Cx) where 40 tons cooling or 600 KBtuh heating/shw Commissioning plan developed by a registered design professional International Energy Conservation Consultants (708)

31 Controls are complicated International Energy Conservation Consultants (708)

32 Top 14 Highest Ranked Control Measures (surveyed) International Energy Conservation Consultants (708)

33 C Economizers Economizers 54,000 Btu/h 33

34 C Ultra-Low-Leak, FDD-Equipped Economizers Dampers are a key component in controlling air intake, exhaust & leakage. Economizers employ dampers to deliberately separate air streams of different temperature. When dampers do not close properly, or contain gaps, they leak air instead of separating it; the temperature difference, and therefore the energy benefit is degraded Dampers and air economizers shall be equipped with Class 1 AMCA Performance Rated, Ultra Low- Leakage dampers. Reporting faults accessible to day-to-day operating personnel or service staff International Energy Conservation Consultants (708) Attribution for slide content and intellectual property in existing materials by IECC_LLC. 34

35 DX Cooling Staging Modulating Units 2015 IECC C (Mandatory) 2018 IECC C (Mandatory) (Mandatory) (Mandatory) 35

36 Refrigerated warehouses & C cooler/freezers not site-built C site-built cooler/freezers

37 C Controls for Anti-Sweat Heaters Controls for Anti-Sweat Heaters Anti-Sweat Heaters prevent refrigeration and freezer door seals and glass from frosting or freezing. These heaters do not typically have controllers to manage when and how long they should run. They are simply on. They run 24 hours, 7 days, 365 days a year. This is a considerable waste of energy because they are not needed all the time. International Energy Conservation Consultants (708)

38 C Demand Control Ventilation Demand Control Ventilation Required for > 500 ft² and >25 people/1000 ft² With an air-side economizer, or Automatic modulating OA damper control, or Providing design OA > 3,000 cfm Exceptions: Systems equipped with energy recovery, Systems > 75% of makeup air is exhausted (commercial kitchens) Correctional cells, daycare sickrooms, laboratory, Barber, beauty and nail salons, bowling alleys Use whichever DCV method appropriate: (e.g. scheduling, occupancy count, CO2) International Energy Conservation Consultants (708)

39 What is VRF? Cooling Mode Heat Pump Heating Mode Cooling or Heating Heat Recovery Simultaneous Cooling AND Heating

40 Brazed Joints Only in Chicago, NYC Many VRF manufacturers ship equipment with flares Flares must be removed and then brazed (need space for proper brazing)

41 2018 IECC and ASHRAE C403.6 Requirements for Multi-Zone Systems Multi-Zone Fan Control International Energy Conservation Consultants (708)

42 International Energy Conservation Consultants (708) Fan Power & Efficiency Grade (AMCA 205) C (Mandatory FEG > 67) ASHRAE/AMCA Fan Committee recognized that a highly efficient fan will operate inefficiently if used in the low-efficiency region of the fan curve. This led to a requirement that fans be specified within 10 percentage points of the peak total efficiency.

43 C Energy recovery ventilation Energy recovery 43

44 C Energy recovery ventilation Energy recovery International Energy Conservation Consultants (708)

45 C Energy recovery ventilation Energy recovery International Energy Conservation Consultants (708)

46 ASHRAE Only Sub-metering Recording & reporting In NEW buildings 25,000 ft 2 Devices installed to monitor: a. Total electric energy b. HVAC systems c. Interior lighting d. Exterior lighting e. Receptacle circuits In buildings w/ tenants, monitoring shall include building, and each individual tenant (excluding shared systems). Data of electrical consumption recorded 15 min. intervals and reported/made available to tenants for up to 36 months. International Energy Conservation Consultants (708)

47 ASHRAE Only building energy monitoring Buildings and additions > 25,000 ft 2 Measure and record Natural gas, Fuel oil, Propane, Steam, Chilled water, Hot water consumption. International Energy Conservation Consultants (708)

48 ASHRAE Appendix G PROVISIONS 48

49 Appendix G for New! Buildings Building Performance Factor (BPF) Performance Cost Index Target, Baseline Building Unregulated Energy Cost, Baseline Building Regulated Energy Cost, Baseline Building Performance 49

50 Copyright Materials This presentation is protected by US and International Copyright laws. Reproduction, distribution, display and use of the presentation without written permission of the speaker is prohibited. International Energy Conservation Consultants, LLC This program is funded by ComEd, Nicor Gas, Peoples Gas and North Shore Gas 50 customers in compliance with Illinois law.