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Update on PTCS Commissioning, Controls, and Sizing Measure Status - June 2014

This document provides a comprehensive update on the UES measure concerning PTCS commissioning, controls, and sizing, including the latest progress and recommendations as of June 17, 2014. It highlights the specifications required when installing new heat pumps and summarizes the measure's history, including key developments from 2012 to 2013. The current status indicates that the measure is under review, with recommendations to develop a research plan, revise specifications, and reassess savings assumptions to ensure compliance and efficacy moving forward.

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Update on PTCS Commissioning, Controls, and Sizing Measure Status - June 2014

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  1. PTCS Commissioning, Controls & SizingUpdate of UES Measure Category and/or Status Regional Technical Forum June 17, 2014

  2. Measure Overview • Measure Specification (summarized) • When installing a new heat pump, ensure it’s installed to the PTCS specifications (sizing, controls, airflow, etc.). • Measure History • April 2012: Approved as proven (category) active (status), staff to clean up documentation. • Nov 2012: Change status to under review (staff had trouble linking the key savings parameters to the study results) • Dec 2013: Extend sunset date to May 2014 to a) incorporate last-in analysis, b) revise the measure specifications, and c) develop a research plan to re-establish an understanding of baseline and efficient-case installation practices. • Current Standing: Expired, Proven, Under Review

  3. Progress since December • A) Last-in Analysis • Plan to present all SF Wx and HVAC measures at July meeting. • B) Measure Specification Update • No progress made since July 2013 subcommittee meeting. • C) Research Plan • Staff is working on research plan (with Bob Davis).

  4. Outline of Proposed Research plan Data Collection • Baseline: • For 160 houses that recently received a (non-PTCS) heat pump, collect the following data: • Heat Pump Sizing • House Audit, including ducts, to get heat load, then balance point • Heat Pump Controls • Control of resistance heat • Compressor operation at low ambient • Real-world capacity of the heat pump • Airflow across indoor coil • Indoor coil temperature split • Efficient-case • For 160 houses that recently received a PTCS heat pump, collect the same data as above. Rough, Ball-park, Estimated Cost • $500 per house for field data collection = $160,000 • Recruiting, data analysis, reporting = $160,000 • Total $320,000

  5. Staff Recommendation Either: (A) – Revise Sunset Date, move to Planning, Under Review • Change category to Planning • Don’t know baseline energy use; Don’t know efficient-case energy use • Leave status as Under Review • Need to develop a research plan • Need to revisit savings assumptions • 100% compliance with the specification in the efficient-case is not reasonable considering results of many of the previous QA visits • Need to come to a conclusion on the measure specification • Set Sunset Date to December 2014 • Provide time to develop research plan, revise savings assumptions, and finalize measure specification • Plan to Modify Savings • Not today, but as part of moving from Under Review to Active (B) – Deactivate • Bring this measure back when it has its act together.

  6. Decision “I _________ move that the RTF approves the UES measure PTCS Commissioning, Controls, & Sizing as: ________________.”

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