New Wisconsin Energy Code: What it Means for Me?

Transcription

1 2018 Wisconsin Energy Efficiency Expo Hosted by the Wisconsin Association of Energy Engineers New Wisconsin Energy Code: What it Means for Me? May 17, 2018 Shana Scheiber, PE, LEED AP ID+C, WELL AP Building Performance Consultant Affiliated Engineers, Inc.

2 Affiliated Engineers, Inc Offices in the U.S. and U.K. EMPLOYEES STRATEGIC PLANNING + INNOVATION DESIGN + PROVEN PERFORMANCE 233 LEED PROJECTS AEI s Vision / Confronting challenges facing society, with insight and innovation.

3 Objectives Understand Why Energy Code Exists USA Wisconsin History Lesson Awareness of Impacts Comparison of Old and New Wisconsin Code

4 US Energy Consumption by Sector

5 US Commercial Sector Energy Consumption By Utility

6 Wisconsin Energy Consumption by Sector Reduce Energy Impact of Buildings 1,775 Trillion Btu of energy consumed in Wisconsin annually Buildings account for 43% of total energy consumption in Wisconsin WI Energy Consumption by Sector (2015) Source:

7 What Drives Energy Targets and Requirements?

8 Current Status of Energy Code Adoption As of 5/9/2018

9 National Energy Code Development 1973: Energy crisis of : California enacts appliance efficiency standards 1975: Energy Conservation and Production Act (ECPA) 1987: National Appliance Energy Conservation Act 1992: Energy Policy Act of 1992 (EPACT 1992) 2005: Energy Policy Act of 2005 (EPACT 2005) 2007: Energy Independence and Security Act of 2007 (EISA 2007) 1975: The first version of ASHRAE 90.1 ( ) 1989: ASHRAE : ASHRAE : ASHRAE : ASHRAE : ASHRAE : The first version of ASHRAE : ASHRAE

10 Wisconsin Commercial Energy Code Development Effective Milestones Jul 1, 1978: Department of Commerce (COMM) Chapter 63, regulates multi-family & commercial Jul 1, 2002: 2000 IECC with WI amendments Mar 1, 2008: 2006 I-codes for commercial buildings with WI amendments Sep 1, 2011: 2009 IECC adopted, COMcheck acceptable May 1, 2018: 2015 IECC adopted, COMcheck acceptable April, 2018: Wisconsin Amendments to 2015 IECC adopted

11 Estimated Energy Impact of Wisconsin Code Update Energy Use Intensity [kbtu/sf/yr] Impact of Skipping a Code Cycle 15% 32% 15% 20% 2009 IECC 2012 IECC 2015 IECC

12 2015-IECC ASHRAE

13 The Path to Energy Code Compliance Regulated Building Systems Envelope HVAC Power Lighting Service Hot Water Mandatory Requirements Prescriptive Options Both work for IECC and ASHRAE 90.1 Energy Model Compliance

14 Energy Model Options 2015-IECC ASHRAE Energy code compliance performance path Quantifying savings beyond energy code compliance Section C407 Total Building Performance Chapter 11: Energy Cost Budget Method Appendix G: Performance Rating Method

15 Energy Code in Wisconsin Old WI state Code Focus on Energy Design Assistance LEED IECC or ASHRAE WI amendments ASHRAE Appendix G ASHRAE Appendix G LEED v4 ASHRAE Appendix G New WI State Code New Focus on Energy Design Assistance 2009-IECC or ASHRAE WI amendments ASHRAE Appendix G??

16 ASHRAE Climate Zones

17 ASHRAE Changes Envelope-Mandatory Continuous air barrier air leakage requirements Envelope-Prescriptive Envelope improvements Skylight % of roof Prioritization of south facing glazing

18 ASHRAE Changes HVAC Optimized VAV system is required! Compliance can not be met by selecting compliant equipment!!!

19 ASHRAE Changes HVAC Mandatory New regulated equipment Demand control ventilation for more spaces required when >=25 people per 1000SF Optimized fan controls DDC requirements and controls Insulation requirements for steam, HHW & CHW Duct sealing requirements

20 ASHRAE Changes HVAC Prescriptive Operating Less than 8000 Hours per Year Operating Greater than 8000 Hours per Year Exhaust air energy recovery required for more climate zones and lower airflows

21 ASHRAE Changes HVAC Prescriptive continued Equipment improvements New equipment included in standard Economizers Controls Simultaneous heating/cooling limitations Reheat DT limits for overhead systems Supply air temperature reset Pump speed differential pressure reset Heat rejection equipment Auto HVAC shut of when door opens Fan modulation

22 ASHRAE Changes HVAC Prescriptive continued Fans efficiency improvements Optimize static pressure sensor (for reset) ECMs for motors 1/12-1hp Fan HP allowance adjustments Boiler turndown Chiller and boiler isolation requirements Chilled water pipe sizing Hot gas bypass Limits Laboratory Exhaust Kitchen Exhaust

23 ASHRAE Changes Service Water Heating-Mandatory ~0-3% Performance requirement increases for Water Heating Equipment Service Water Heating-Prescriptive High-Capacity (>1 MMBtuh) Service Water Heating Systems - Minimum thermal efficiency of 90%

24 ASHRAE Changes Power Mandatory Low voltage dry-type distribution transformers Automatic receptacle controls Electrical Energy metering and documentation requirements

25 ASHRAE Changes Mandatory Lighting Requirements Daylighting Controls Occupancy-based everywhere Manual-on everywhere Bilevel Scheduled shutoffs for most space types Exterior lighting Controls: daylighting & time clock limits are based on night activity

26 ASHRAE Changes Lighting-Prescriptive ~10-30% LPD reduction (varies by building and space type) Building Type Health-care clinic Hospital Hotel Manufacturing Multifamily Office Parking Garage Retail School/University

27 ASHRAE Changes Other Equipment-Mandatory Electric motor regulations Energy Monitoring

28 ASHRAE Changes Chapter 11-Energy Cost Budget Method Service hot water Unmet load hours Kitchen exhaust systems Min flow setpoints Supply air temp reset Heat rejection design sophistication Fan speed controls

29 ASHRAE Changes Appendix G Performance Rating Method % fenestration based on building area type Baseline HVAC systems Service hot water Ventilation changes: Credit allowed for improved ventilation efficiency Penalty for over ventilating Unmet load hours Heat recovery per prescriptive Purchased utility pump power Min flow setpoints reduced Building Type Health-care outpatient Baseline Gross Above-Grade Wall Area 21% Hospital 27% Office 5000 SF 19% Office 5000 to 50,000 SF 31% Office > 50,000 SF 40% School (primary) 20% School (secondary & University) 22%

30 ASHRAE 90.1 Future Where do we go from here? Regulated Buidling Energy Use vs ASHRAE % 100% 90% 80% 70% 60% 50% 40% 30% 20% 10% ASHRAE 90.1 Building Target Possible Path to nearly Net Zero Buildings 0% Year MaxTech Limit Full Load Efficiency Equipment Level Limit Systems Approach & Renewable Energy Chart is an estimate of possible future regulations to achieve Near Net Zero by 2034 based on studies done by Carrier on technical limits of HVAC equipment

31 Final Thoughts Design teams to plan for code compliance path early in design Many projects will require an energy model for code compliance More sustainable technologies will be required to meet code and rating targets

32 THANK YOU QUESTIONS? Shana Scheiber, PE, LEED AP ID+C, WELL AP Building Performance Consultant Affiliated Engineers, Inc