1 / 13

Herbert E. Hirschfeld, P.E. and Joseph S. Lopes Applied Energy Group, Inc. Metering America 2005

Submetering Case Studies with Load Management and Time-Sensitive Pricing. Herbert E. Hirschfeld, P.E. and Joseph S. Lopes Applied Energy Group, Inc. Metering America 2005 April 13, 2005. Background. Residential Electrical Submetering

calida
Download Presentation

Herbert E. Hirschfeld, P.E. and Joseph S. Lopes Applied Energy Group, Inc. Metering America 2005

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Submetering Case Studies with Load Management and Time-Sensitive Pricing Herbert E. Hirschfeld, P.E. and Joseph S. Lopes Applied Energy Group, Inc. Metering America 2005 April 13, 2005

  2. Background • Residential Electrical Submetering • Conversion of master-metered apartment buildings to submetering • Transfers payment responsibility from owners to residents, retains bulk rate • Proven energy savings: 18-26% or more • Allocates energy costs fairly, reduces waste and adversarial issues

  3. Background • Load Management • Control of appliances/end uses by utility or customer to reduce peak demand • Incentives for load reduction available from utility, states, grid operators (ISO) • Time-Sensitive Pricing • Vary prices by time of day, day of week, or utility system conditions (critical peak) • Real-time pricing, time-of-use (TOU)

  4. Submetering as a Catalyst • New submetering technology provides 2-way communications, enabling remote monitoring and control, including: • Load management of key appliances (A/C, Heat) • Interval Meter reading for time-sensitive rates, monitoring of load control events • Other: Monitoring of comfort (temperature), safety (smoke/CO2 detectors, fire/door alarms) • Submetering plus load management and/or time-sensitive pricing means more benefits, small incremental cost = more cost-effective

  5. Case Studies: Enhanced Submetering Waterside Plaza Clinton Hill Apartments New York City rental apartment complex; built early 1970’s; 1470 units, all-electric with heat pump units in each apt. Brooklyn, NY coop apartment complex; built in 1940’s; 1225 units; 66% own, 34% rent; recent electrical upgrade; room A/C’s

  6. Case Study: Waterside Plaza • All-electric rental apartment complex: electric costs a major concern • Dual System installed (1997) • 2 functions enabled with shared PLC communications system: submetering and energy management system (EMS) • Designed to satisfy both owners and tenants: • Housing agency (HPD) wanted EMS with resident override feature (no rent reduction issues); • Owner wanted electrical submetering (requires rent reduction process) • Incentive $ for both EMS and Submetering

  7. Case Study: Waterside Plaza Chronology of System Operation • 1997-1999: EMS shuts off heat pump units at scheduled times energy and cost savings • 1999-2004: After Privatization, Submetering for opt-in units (EMS optional); higher rents for opt-out units (EMS mandatory) • 2004 on: Price-responsive load management • NYSERDA R&D Program incentives for equip. upgrade • Incentives from NY ISO for load control; Voluntary participation by tenants; incentives ($100K for 2004) shared by owner and participating residents

  8. Case Study: Waterside Plaza Comparison of Electric Costs for Submetered vs. Non-Submetered for typical building (#40) Mar ‘04–Feb ‘05 Ave. Submetered tenant bills were 33% less than Non-Submetered for 12 month period; 38% less for winter; 19% less for summer (* app. 180 apts. in each group)

  9. Case Study: Clinton Hill Apartments Chronology of Events • Pre-2001: Master-metered, insufficient electric service (A/C) • 2002: Electrical upgrade, NYS Code requires metering; shareholders opt for submetering; meters installed in basement • 2003-2004: Submetering installed and tested; implemented early 2004 (shareholders only); rental apt. owners await DHCR approval before charging for electric • 2004: NYSERDA Program for Time-Sensitive Pricing applied to submetered residents; shadow period June 2004 – March 2005; full-scale April 2005 (planned); total electric costs allocated to each apartment based on both WHAT and WHEN kWh is used

  10. Case Study: Clinton Hill Apartments Time-Sensitive Pricing • Typical Building Profile vs. Rate Structure (weekdays) • Rates: Peak=3x offpeak; Shoulder=2x offpeak. based on algorithm • Critical Peak rate (6-10pm, red bars on graph) designed to address building peak on 3-5 hottest days per summer month • Building is billed for kWh and peak kW (any hour) • Weekend has 6-10 pm Shoulder peak period (could be billing peak)

  11. Case Study: Clinton Hill ApartmentsBenefits of Submetering Participants (Shareholders) vs. Non-Participants (Renters): • Participants pay for their electricity, so they waste less and use about 35% less than renters • App. 825 apts. are participants vs. 400 non-participants • Participants use less than Non-participants every month

  12. Case Study: Clinton Hill ApartmentsBenefits of Time-Sensitive Pricing Participants vs. Non-Participants: • Participants receive “shadow” bill (what they would pay under TOU rate) Higher rate of savers under TOU for participants (avg. 57%) than for non-participants (avg. (45%)

  13. Case Study Conclusions • Submetering alone saves energy, confirming NYSERDA studies citing 18-26% reduction • Submetering plus load management reduces both peak kW and energy usage (kWh); qualifies building and residents for incentives, including utility and state curtailment programs • Submetering plus Time-Sensitive Pricing also shifts usage, reduces peak on utility system and on building demand • Incremental cost of adding load management and time-sensitive pricing to submetering (with common communications) is small compared to savings potential, improving cost-effectiveness of system

More Related