Demand Responsive Lighting Controls California Statewide Utility Codes and Standards Program Josh Rasin Heschong Mahone Group, Inc. Lighting Stakeholder Meeting #3 February 24, 2011
Demand Responsive Lighting Controls Expand requirement for DR Lighting All nonresidential new construction buildings (not just retail) Size threshold 8,000sf (was 50,000sf) Take advantage of Section 131 requirements (d) Automatic shutoff control (b) Bi-level wiring or (b) Proposed controllable lighting requirement Dimming or multi-level control 2
3 Definitions Demand Response Changes in electric usage by end-use customers from their normal consumption patterns in response to changes in the price of electricity over time, or to incentive payments designed to induce lower electricity use at times of high wholesale market prices or when system reliability is jeopardized. Demand Response Signal A signal indicating an electricity price or a request to curtail electricity consumption.
4 Definitions continued Demand Responsive Lighting Control A control that is capable of receiving and responding to a demand response signal.
5 Proposed Code Language Section 131(g) Demand Responsive Lighting System. In buildings larger than 8,000* square feet, all lighting meeting the requirements of Section 131(b) shall be capable of being set to either the high, medium or low ranges, as defined in Table 131-A, by a demand responsive lighting control. *Size threshold to be determined for final report Contingent upon SCE Controllable Lighting Proposal being adopted
6 2008 Bi-Level Control Baseline Section 131(g) Demand Responsive Lighting System Buildings larger than 8,000* square feet, excluding residential common areas, areas with automatic daylight controls, or any space with an LPD less than or equal to 0.5 W/s.f., shall have demand responsive lighting controls capable of temporarily limiting lighting power to no more than 85% of the permanently installed lighting power in the enclosed space. If general lighting is reduced, it must be done in a uniform manner in accordance with Section 131(b).
7 Inputs to Receive DR Signal Control Panel Ethernet cable OR Built-in OR Network adapter for zone based system
8 Energy Savings Assume default customer rate similar to PG&E Peak Day Pricing Rate http://www.pge.com/demandresponse/peakdaypricing/ Peak rate $0.80 - $1.20/kWh 9-15 peak days each year, 4-6 hour peak Up to 90 peak hours annually Top 1% of TDV hours 88 hours annually 15-year Nonres TDV value approx. $16/kWh
9 Statewide Energy Savings Enrollment Rate 70% % Load Shed 20% Signal Reception 97% Participation Rate 90% Building Type Building LPD (W/sf) Average Savings Weighted Across Climate Zones ($/sf) Office 0.8 $0.14 Retail 1.34 $0.23 Grocery Store 1.34 $0.23 Hotel 0.86 $0.26 Restaurant 1.17 $0.20 Warehouse 0.65 $0.11 Refrigerated Warehouse 0.68 $0.12 Schools 1.0 $0.17 Average Savings Weighted Across Building Types ($/sf) N/A $0.18
10 Compliance Scenarios Strategy A Bi-level wiring back to relay at panel Strategy B Addressable Lighting system add input device Strategy C Powerline Dimming add input device Strategy D Local zone system add network adapters Strategies B-D require programming
Cost Effectiveness in prototype buildings 11 Small Office Prototype - 8,223 sf Large Office Prototype 34,087 sf Number of Rooms Net Area [sf] LPD Number of Rooms Net Area [sf] LPD 25 8,223 0.90 71 34,087 0.91 Strategy Small Office Prototype (8,000sf) Costs ($/sf) Savings (TDV $/sf) Benefit Cost Ratio Large Office Prototype (30,000sf) Costs ($/sf) Savings (TDV $/sf) Benefit Cost Ratio A: Bi-Level Wiring $0.21 $0.11 1.85 $0.21 $0.11 1.92 B: Addressable lighting system $0.21 $0.19 1.12 $0.21 $0.14 1.55 C: Powerline Dimming $0.21 $0.01 14.87 $0.21 $0.02 10.19 D: Local zone $0.21 $0.55 0.38 $0.21 $0.12 1.69
12 Cost Effectiveness Small Office
13 Cost Effectiveness Large Office
14 Comments / Questions? Josh Rasin rasin@h-m-g.com (916) 962-7001