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Hour by hour calculation of annual energy use compare

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Unformatted text preview: scriptive requirements of the MNECB “EE4” Software EE4 PERFORMANCE COMPLIANCE ANALYSIS DESCRIBE “PROPOSED DESIGN” Launch Simulation “PROPOSED DESIGN” “REFERENCE DESIGN” (PRESCRIPTIVE DESIGN) Hour-by-hour calculation of annual energy use. Hour-by-hour calculation of annual energy use. Compare Simulated Results Energy Uses: Space Heating, Space Cooling, Lighting, Fans, Pumps, etc. ASHRAE 90.1 PERFORMANCE COMPLIANCE ANALYSIS “ENERGY COST BUDGET” “PROPOSED DESIGN” “BUDGET DESIGN” (PRESCRIPTIVE DESIGN) Hour-by-hour calculation of annual energy use. Hour-by-hour calculation of annual energy use. Annual Energy Cost Annual Energy Cost Budget Compare Results “Green Building Rating Systems” • Green Building Rating Systems are increasingly being used to assess the “environmental performance” of buildings. • The most prominent rating system presently being used in North America is “LEED” LEED is an acronym for: Leadership in Energy and Environmental Design LEED • A voluntary “green building” certification program administered by the “US Green Building Council” (USGBC) in the USA, and the “Canada Green Building Council” (CaGBC) in Canada. • Buildings that meet certain requirements can earn “points” towards certification. • Program is intended to provide motivation for the project team to consider certain key factors of a building’s environmental performance. • LEED includes rating systems for existing buildings and for new construction projects. LEED-EBOM LEED for Existing Buildings -- Operations and Maintenance LEED-NC LEED for New Construction • Buildings that achieve certain “prerequisites” plus a minimum number of “points” can be “LEED certified”. • At higher levels of points, projects might earn “Silver”, “Gold”, or “Platinum” certification. • Points are earned in categories addressing different environmental issues, such as: - Energy and water conservation. - Use of low off-gassing paints and carpets. - Reducing construction waste sent to landfill. Cumulative Number of LEED Certified Projects in Canada (to June 30, 2012) 800 700 600 500 400 300 200 100 0 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 LEED Canada NC-2009 Points Categories: Points Available Category Sustainable Sites 26 Water Efficiency 10 Energy & Atmosphere 35 Materials & Resources 14 Indoor Environmental Quality 15 Innovation & Design Process 6 Regional Priority 4 Total Certification Levels: 110 Level Points Needed Certified 40-49 Silver 50-59 Gold 60-79 Platinum 80+ LEED Canada NC-2009 – Energy & Atmosphere Category Pre-Requisites (Mandatory) • Fundamental Commissioning Assessed by Computer Energy Simulation • Minimum Energy Performance • Fundamental Refrigerant Management Credits Points Available • Optimize Energy Performance 19 • On-Site Renewable Energy 7 • Enhanced Commissioning 2 • Enhanced Refrigerant Management 2 • Measurement & Verification 3 • Green Power 2 Energy & Atmosphere Total 35 Assessed by Computer Energy Simulation LEED Canada NC-2009 – Energy & Atmosphere Category Minimum Energy Performance Prerequisite (Mandatory) Reduce design energy cost 23% relative to MNECB. (Demonstrated by whole-building computer simulation.) or Reduce design energy cost by 10% relative to ASHRAE 90.1-2007. (Demonstrated by whole-building computer simulation.) LEED Canada NC-2009 – Energy & Atmosphere Category Optimize Energy Performance (1 to 19 points) Reduce design energy cost relative to MNECB or ASHRAE 90.1-2007. (Demonstrated by whole-building computer simulation.) Points awarded based on table… New Buildings Points (for NC) 25% 1 27% 2 28% 3 30% 4 … … 50% 16 52% 17 54% 18 56% 19 Reminder… Measured vs Simulated Site Energy-Use-Intensity (from a study of 70 LEED Certified Buildings) Measured Energy-UseIntensity (kbtu/ft2-yr) Simulated Energy-Use-Intensity (kbtu/ft2-yr) For Comparison: LEED Canada EBOM 2009 Points Categories: Points Available Category Sustainable Sites 26 Water Efficiency 14 Energy & Atmosphere 35 Materials & Resources 10 Indoor Environmental Quality 15 Innovation in Operations 6 Regional Priority 4 Total Certification Levels: 100 Level Points Needed Certified 40-49 Silver 50-59 Gold 60-79 Platinum 80-100 LEED Canada EBOM 2009 Minimum Energy Performance Prerequisite (Mandatory) Optimize Energy Performance (1 to 18 points) Cumulative Number of LEED Certified Projects in Canada (to June 30, 2012) 800 700 600 500 LEED-EBOM Certifications = 10 400 (as of June 30, 2012) 300 200 100 0 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 ASHRAE Standard 189.1 -- “Standard for the Design of High-Performance Green Buildings Except Low-Rise Residential Buildings” Compliance Options: Prescriptive Path Performance Path Annual Energy Cost Annual GHG Emissions Annual Peak Electrical Demand All 3 metrics must be no greater than those for the Reference Case (Prescriptive Case). Building Energy Performance – Spring 2012 - Topic 22 “Integrated Design Process” (Part 2) Designing a new building: Investment that reduces load (e.g. insulation upgrade) can potentially reduce heating energy, HVAC equipment capacity, and “transport energy”. wall U Ti boiler losses electricity baseboard heater boiler fuel pump piping To piping energy delivery energy supply pump “transport” energy (“transmission” energy) duct energy delivery energy supply fan tra...
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This note was uploaded on 10/04/2012 for the course ME 760 taught by Professor Davidmather during the Spring '12 term at Waterloo.

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