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Hosted by Energy Division and Program Administrators

CSI-Thermal Workshop Other Thermal Technologies. Hosted by Energy Division and Program Administrators California Public Utilities Commission February 23, 2011. Introduction. Purpose of this workshop:

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Hosted by Energy Division and Program Administrators

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  1. CSI-Thermal WorkshopOther Thermal Technologies Hosted by Energy Division and Program Administrators California Public Utilities CommissionFebruary 23, 2011

  2. Introduction • Purpose of this workshop: • Get feedback from interested parties on the opportunities and challenges to include new technologies into the CSI-Thermal Program • Provoke discussion that will guide written comments and inform a future CPUC Decision on the inclusion of these technologies.

  3. Background • CPUC Decision 10-01-022 established a phased rollout for the CSI-Thermal Program • Single-family incentives on May 1, 2010 • Multi-family/Commercial incentives open on October 8, 2010 • Non-Water Heating and Low-income incentives to be available in 2011

  4. Background • D. 10-01-022 directs Energy Division to: • Hold a workshop on the eligibility of non-SWH thermal technologies that displace gas and meet all other program requirements. • Provide a workshop report to the Service List • Workshop should address: • What technologies are eligible • How to estimate thermal displacement for incentives calculation purposes • Whether performance-based incentives might be appropriate for these technologies.

  5. Survey of Technologies • Solar Space heating • Solar cooling • Desiccant cooling • Absorption chillers • Adsorption chillers • Process Heat and other end uses • Combination systems • Others?

  6. Solar Space Heating Challenges System Design Standards Overheating Low savings Incentive payment estimation Occupant behavior Building baseline?

  7. Solar Process Heat • Challenges • System Design Standards • Sizing guidelines • Overheat protection • Storage requirements • Incentive Payment Calculation • Lack of standard load profiles • Variability in business cycle

  8. Solar Cooling Challenges Standards Are there any yet in the US or Europe or elsewhere? How to evaluate and verify reliability? Many are in the demonstration stage -- should ratepayers fund experimental projects? Some use risky materials (ammonia, some salts) Should a net greenhouse gas target be set?

  9. Solar Cooling Challenges Incentive Payment Calculation What building baseline to use? Require an audit? Match building load shape to system output? Have storage or conventional backup? If payments are based on metered energy, how to measure contribution of solar energy to cooling system?

  10. Technical Standards Development What is the best process for developing technical standards for system design and installation? Technical committee of industry members? Sub-committee at SRCC or other listing agency? PAs develop standards with help from federal agencies national labs, universities and other technical experts?

  11. Industry Challenge Help us develop standards and an approach to evaluate and approve these cooling technologies. Help develop simulation methodology Baseline cooling Performance factors Energy savings/displacement

  12. Incentive Payment Options Use existing TRNSYS model for all solar thermal systems Advantages: Ease of implementation Simplicity Potentially easy for contractors to use/understand Disadvantages Might not be possible for all systems Might be expensive if custom modeling becomes the norm Might not be very accurate

  13. Incentive Payment Options 2)Use TRNSYS model for water heating plus “kicker” for additional savings for combination systems Identify “typical” house in terms of size and UA value  Pick a climate zone to model (say San Diego) Simulate the energy for heating water (3 people) and for combined space heating and DHW Simulate with one collector, then two collectors.  Use the difference to estimate the kicker incentive Repeat for each climate zone.  Simply determine additional energy savings per sq. ft. in each zone

  14. Incentive Payment Options 2. Use TRNSYS model for water heating plus “kicker” for additional savings for combination systems • Advantages • Maintains simplicity of single-model system • Could be fairly quick and easy to implement • Would likely to be difficult to “game” • Disadvantages • Probably wouldn’t reward “high-performing” technologies • Only works for combination DWH/space systems • Might not work for Commercial combination systems.

  15. Incentive Payment Options Use other energy estimation tools to model non-WH technologies Advantages Modeling might be more accurate if estimation tool is specific to technology Disadvantages Not clear whether such tools exist and if so, how accurate they are. Would probably involve time and cost to contract with new model developers and incorporate into database

  16. Incentive Payout Options Performance-based Incentives (PBI) Advantages Eliminates the problem of estimating thermal loads and modeling output Most accurate possible way to pay for energy displaced – encourages good design Encourages maintenance and upkeep during PBI term Disadvantages Might not be possible to accurately meter all system types Cost/time to set up and administer payment system Still need a method to estimate thermal displacement for budgeting purposes (possibly stamped engineering estimates) Applicants may prefer up-front incentives

  17. Wrap up and next steps • By Friday 3/25, Energy Division will provide a list of questions for parties • Parties may (but are not required) to use these questions to guide written comments • Informal written comments should be sent to Energy Division by Friday, March 18 • Comments should also be sent to the CPUC Service List for the DG/CSI: R. 10-05-004 • Energy Division will provide a workshop report by Friday, April 15.

  18. Thank you! • Please contact me with any questions Damon Franz df1@cpuc.ca.gov (415) 703-2165

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