Commercial Air Conditioners POU TRM DEER MEASURE REVIEW

Commercial Air Conditioners POU TRM / DEER MEASURE REVIEW SUBCOMMITTEE

Measure Review Objectives 2 Objectives: �Review TRM and DEER measures for accuracy, transparency, documentation �Compare methods q q q POU TRM DEER Other Jurisdictions �Issue recommendation on if, and how, to update measure for statewide use 9/2/2021

Quick Overview 3 �POU TRM references 2014 DEER, which is based on DOE 2. 2 building simulations q Parametric runs using DEER building prototypes, too complex for the scope of this subcommittee to review the building prototype assumptions �DEER 2016 has been updated to reflect 2016 Title 24 code �Most other jurisdictions use an engineering algorithm to calculate savings Title 9/2/2021

Summary of Approaches 4 Sector Measure Case Description Base Case Description TRM 2016 DEER (Effective 1/1/16) Other Jurisdictions Commercial Varies based on unit size, efficiency, building types, climate zones <5 tons up to 20 tons 14, 15 SEER 10. 5 – 12 EER 2013 Title 24 Varies based on unit size, efficiency, building types, climate zones 2016 Title 24 Varies based on unit size and efficiency, region in some cases Varies depending on standard used Source: DEER 2014 Savings Methodology Varies Source: DEER 2014 (DOE 2. 2 building simulation) Varies Source: DEER 2016 (DOE 2. 2 building simulation) EUL 15 years Source: DEER 2008 15 years Source: uknown 15 years IMC $20 - $200 / ton Source: PG&E Workpaper, distributor cost quotes No official costs, however CPUC measure cost study (WO 17) contains hedonic price model for DX AC <= 5 tons and >5 tons Around $100 - $160 k. Wh = Btu/hr/1000 (1/base. EER – 1/measure. EER) x EFLH from studies, or backed out of DEER model 9/2/2021

Observations: Transparency, Documentation 5 �Documentation of DEER building prototypes in extremely limited q q DOE 2. 2 building prototypes have a multitude of assumptions and input values that are poorly documented, if at all 2005 DEER Itron report provides majority of prototype documentation and is not very informative Vetting the prototype assumptions would be very timeconsuming DOE 2. 2 functionality and “hard-wired” algorithms are a black box, not open source �No documentation of EUL assumptions 9/2/2021

Other Jurisdictions 6 �Savings and demand algorithm is consistent q q q (k. Btu/h) * [(1/SEERbase) – (1/SEERmeasure)] / 1000 * EFLH (k. Btu/h) * [(1/EERbase) – (1/EERmeasure)] / 1000 * EFLH One jurisdiction used a formula to convert SEER to EER �EFLH come from studies, in some cases backed out of DEER �EUL = 15 years �IMC = $100 - $160 / ton 9/2/2021

Considerations 7 �UES methodology: building model versus engineering algorithm? q Building model outputs and engineering equations should be compared with field data. �EUL of 15 years has no documentation �IMC q q q CPUC WO 17 measure cost study, p. 3 -64: hedonic price model for packaged DX AC, <= 5 tons and >5 tons Function of EER, capacity, voltage, gas heat option, manufacturer Other jurisdictions – vendor costs, in some cases DEER, approximately $100 - $160/ton 9/2/2021

APPENDIX: DEER Info on Commercial Packaged/Split AC Measures 8 �For 2016, UES values for EER-rated equipment didn’t change. However, IEER values corresponding to EER values in DEER were updated per the 2016 DEER webpage � 2014 code update report describes consideration of economizers and 2 -speed fan control on DX equipment, relative changes to DEER UES values �The 2005 DEER Itron report has general information on the commercial prototypes, as well as general info on the 2005 commercial AC measures Title 9/2/2021