Energy Analysis Review of Implications Jon Mc Hugh

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Energy Analysis Review of Implications Jon Mc. Hugh, Sr. Project Mgr. The HESCHONG MAHONE GROUP for Pacific Gas & Electric Co. Codes & Standards Program CASE Initiative Project Copyrighted © 2000 PG&E All Rights Reserved

Residential Energy Model 1761 SF house with equal glazing distribution in each direction Hourly energy values from TDV research version of MICROPAS A/C and Heat Pump Efficiency adjusted with respect to ambient temperature DHW loads allocated to 4 load profiles from PG&E load survey data • weekday vs. weekend • summer vs winter CASE Initiative Project Copyrighted © 2000 PG&E All Rights Reserved

Residential TDV Energy Costs Hourly energy multiplied by hourly energy costs for all 8, 760 hours of the year 30 Year PV, 3% real discount rate Three energy sources: • Electricity • Natural gas • Propane Multiplies by hourly TDV costs for five CA climate zones: 3 (Oakland), 6 (Long Beach), 14 (China Lake) 16 (Shasta) CASE Initiative Project Copyrighted © 2000 PG&E All Rights Reserved 13 (Fresno),

Residential Conclusions TDV costing increased the value of all efficiency measures considered Electricity more expensive when very hot or very cold Natural gas and propane more expensive in winter than summer Benefit of switching to fuel less for propane than natural gas CASE Initiative Project Copyrighted © 2000 PG&E All Rights Reserved

Nonresidential Energy Results Same energy results from earlier work (1999 Dollar Based Standards project) 6 protoype buildings Typical schedules for each building type (divergence from ACM rules) DOE-2 model not Energy. Pro Hourly energy results multiplied by TDV energy costs for 8, 760 h/yr TDV costs: 15 year PV at 3% real discount rate CASE Initiative Project Copyrighted © 2000 PG&E All Rights Reserved

Nonresidential Conclusions Results are dependent on building type TDV results for TES inverse of traditional flat costing Value of gas cooling is increased Results for heating measures affected by Fuel type (Nat gas vs. Propane) Greater value for A/C efficiency Lighting LPD valuation sensitive to schedule (occupancy) CASE Initiative Project Copyrighted © 2000 PG&E All Rights Reserved

Residential TDV - further work TDV duct efficiency Refined water heater model SEER to EIR conversion Heat pump sizing - resistance strip contribution to winter peak Thermostat schedules - especially for heat pumps CASE Initiative Project Copyrighted © 2000 PG&E All Rights Reserved

Nonresidential TDV - further work ACM revisions • • • Equipment curves SEER to EIR conversion based on curves Occupancy specific schedules Add TES and Gas Cooling Add Photovoltaics and Solar Heating Peer review of equipment curves Obtain/develop part load curves Revisit equipment specific curves Occupancy sensors vs time clocks Persistence of measures CASE Initiative Project Copyrighted © 2000 PG&E All Rights Reserved

TDV Web Page http: //www. h-m-g. com/TDV/index. htm Reports • Dollar-Based Performance Standards (1999) • TDV Summary Report (2000) Software • Res. TDV. xls • Nonres. TDV. xls Comment form CASE Initiative Project Copyrighted © 2000 PG&E All Rights Reserved