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NetZero & Hearth Products

NetZero & Hearth Products. California Energy Commission Climate zones Appliance standards TDV – Time Dependent Valuation LCC – Lest Cost Calculation 2007 Energy plan - The Role of the IOU’s - CASE Compliance Software -The “Engine” Calgreen PIER. CEC.

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NetZero & Hearth Products

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  1. NetZero & Hearth Products California Energy Commission • Climate zones • Appliance standards • TDV – Time Dependent Valuation • LCC – Lest Cost Calculation • 2007 Energy plan - • The Role of the IOU’s - CASE • Compliance Software -The “Engine” • Calgreen • PIER

  2. CEC • Est. 1974 – 6 Divisions Charged with: • Forecasting future energy needs • Licensing power plants • Promoting Energy Efficiency- Appliances & Buildings – support local Gov Enforcement • Support Renewable Energy, Solar Electric • Public Interest Energy Research ($83Mill) • Planning for Energy Emergencies (2000) • AB 32 Lead Agency - Greenhouse Gas

  3. Policy Goal – Flat per Capita Energy Consumption

  4. Per Capita-by State

  5. California System Status June 27, 2011 (Click graph for details)

  6. Additional Objectives 2013 Code • Achieve big step towards Zero Net Energy codes in 2020 (res) & 2030 (nonres) -15-25% improvement in Standards • Include CEC Approved Reach Standards -propose for Energy Chapter of Title 24, Part 11 (Green Building Code) • Align with CBSC triennial code update

  7. 16 Separate Climate Zones Each with Separate “issues” for buildings

  8. Time Dependent Valuations-TDV

  9. Time Dependent Valuations - TDV

  10. TDV Thermostats • CEC Staff presumes hourly pricing of electricity • Staff assumes thermostats will collect hourly data, & meters will charge by hour • Staff assumes ‘stats’ will have modems & communicate, internally & externally • Almost made it into the 2008 code

  11. Least Cost Calculation-LCC • Equation for Life Cycle Cost Analysis • ΔLCC = Cost Premium – Present Value of Energy Savings • or • ΔLCC = ΔC – ΔTDV $ • Objective is to find measures with negative ΔLCC

  12. LCC

  13. LCC

  14. LCC

  15. IOU’s & “CASE” • California Investor Owned Utilities = IOU • California Codes and Standards Group – • www.calcodesgroup.com • “The Codes and Standards program directs initiatives that will enhance building and appliance standards to codify and implement cost effective, reliable and verifiable demand side measures in support of maximizing portfolio savings.” • Edison, So. Cal Gas, PG&E, San Diego Gas

  16. Current Res CASE list • Envelope Cool roofs • Roof insulation • Advanced building framing and envelope • Windows • Compressorless homes • Infiltration and testing • HVAC Zone air conditioning • Ventilation and economizing

  17. CASE list- cont. • Base case efficiency • Duct pressure drop and testing • Solar oriented developments • Solar ready homes • Solar water heating • DHW and distribution systems • Water heater standing losses • Plug loads Lighting • Plug load controls

  18. Compliance Software – California Simulation Engine (CSE) • All parts of opaque surfaces (frame and cavity) are calculated separately as mass elements (walls, floors, ceilings, interior walls, furniture) • Separate radiant and variable convective heat transfer for all surfaces • Pressure flow air flow network for infiltration, ventilation and HVAC interaction • ASHWAT window model with hourly variable properties and interaction with interior and exterior shades

  19. CSE – Duct Loss, 1 Key Portion Slightly modified 2008 UZM • All or part of the duct system in the attic zone • Convection and radiation between ducts and attic air and surfaces • Leakage from/to attic air •Unbalanced duct leakage assumed for standard cases •Ventilation and infiltration between house and attic by air network

  20. CalGreen • Part 11 of Title 24 (State Building Code) • Focuses on Water use, also Building construction waste & Recycling, HVAC training • Environmental Quality Section – IAQ • “Requires gas fireplaces to be direct-vent, wood and pellet stoves to comply with EPA limits or comply with a local ordinance, whichever is more prohibitive. “ (Green Technology Summit, June 2011) • Whole House Ventilation Systems

  21. PIER • Public Interest Energy Research • Funded by “Public Good” chargeon all IOU utility bills, - 1998-2005 = $6.4 Billion • Bulk stays with Utilities (80%?) • CEC administers R & D, with input from California Public Utilities Commission (CPUC), Workshop July 11, 2011 for- • Long-Term Energy Efficiency Strategic Plan (CEESP)

  22. Tentative Outline-Energy Codes • 2013 Code • Nov ‘09-Oct ’10, Pre Rulemaking, CASE studies • Oct ’10-Dec ’10, 1st workshops • Feb-July ’11, Staff workshops, 1st Draft standards • July-Sept ’11, receive comments, 2nd Draft • March 1, ’2012, CEC adopts Code • April ’12 – Dec ’13, finish compliance manual & software, trainings, • January 1, 2014, Effective Date • 2016 Code • Fall 2012-2013, Pre Rulemaking

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