DeAnza College: ES 76 Energy Reliability and Your Organization Energy Auditing Skills

1. DeAnza College: ES 76Energy Reliability and Your OrganizationEnergy Auditing Skills April, 2002 Ryan Stroupe, Pacific Energy Center Energy Audits

2. Agenda • Overview of energy audits • Billing analysis • Reviewing plans, specifications, submittals • Preparing for the site visit • Retrofit cost analysis • Developing a baselining plan • Discussion of field measurement Energy Audits

3. Why perform an audit? • Identify energy savings potential • improve efficiency • conservation • Improve building performance • Address comfort problems • Pursue utility incentives • Prepare for commissioning Energy Audits

4. Components of an Energy Audit • Analysis • Billing data • Building documentation and drawings • Facility walk through • During typical operation • After hours • Final Report • Recommended Energy Conservation Measures • Energy/$ savings analysis • Other facility improvements Energy Audits

5. Types of Energy Assessments • Preliminary/Walk though audit • Detailed/Investment-Grade audit • Focused audit (process loads) • Commissioning Energy Audits

6. Preliminary Energy Audit • Intention: identify in rough terms, cost-effective retrofits • Focus: standard retrofit technologies • Walk-though, Quick • Cost $0.01 to $ 0.05/sf. • Minimal instrumentation required • Reporting • Recommended ECMs • Some cost analysis (simple pay-back) • No computer simulation Energy Audits

7. Detailed Energy Audit • Intention: develop complete energy assessment • Focus: thorough assessment of facility costs and operation • Will require multiple site visits • Cost $0.10 to $ 0.30/sf. • Advanced tools required • Reporting • Recommended ECMs • Estimates of energy savings, installation costs…(life-cycle analysis) • M&V plan • Computer simulation Energy Audits

8. Building Commissioning Commissioning is done to “verify and ensure that building elements and systems are designed, installed, and calibrated to operate as intended.” (LEED definition) Overall Cost Reductions from Cx Data from”What Building Owners Should Know About Building Commissioning”, Wolpert & Deall, Energy Audits

9. Building Commissioning Why Commissioning? • Assures building are fully functional at completion of construction • Limits building performance problems • Complexity and specialization of modern buildings require Cx • Limits change orders and increased costs during construction • Limits occupant comfort complaints • Provides complete documentation of building project produced • Energy savings realized • Equipment realizes a longer life • Incentives may be available • Encourages an integrated design approach • Introduces owner advocate/neutral party Energy Audits

10. The Commissioning Process • Document design intent • Assist with specifications for bid documents • Develop Commissioning plan • Develop pre-functional and functional test procedures for all equipment • Oversee testing (at post-occupancy not just post-construction) • Review training and manuals for operations & maintenance staff • Provide a complete final commissioning report Energy Audits

11. Monthly electrical usage 12,000 10,000 8,000 6,000 avg. kWh/day 4,000 2,000 0 July-93 January-94 July-94 January-95 July-95 January-96 July-96 January-97 July-97 January-98 July-98 January-99 July-99 Billing Data Analysis Energy Audits

12. Types of Electric Utility Rates For all rates go to: http://www.pge.com/customer_services/business/tariffs/ • Flat rate (fixed $/kWh) • Time of use rates • Rates ($/kWh) vary by demand periods • PG&E rates: A6, E7 • Demand rates • $/kWh • $/kW • Power factor adjustment • Rates may vary by demand periods • PG&E rates: A10, E19, E20 • Real time pricing • $/kWh rate changes based on real cost of generation • PG&E rates: Experimental A-RTP Energy Audits

13. E-20S Rate Energy Audits