Architect and Engineer Lunch and Learn

Transcription

1 Architect and Engineer Lunch and Learn September 30, 2014

2 The Team Kristi Hardy, CenterPoint Energy Energy Efficiency Program Manager Michael Sciortino, CLEAResult Program Consultant August Vega, CLEAResult Program Consultant Fred Wu, CLEAResult Program Manager Jaymar Davis, CLEAResult Field Engineering Manager

3 Team Roles Program Administrator Program Implementer Fund & market programs, conduct post inspections, administer incentive payments Conduct outreach, provide technical assistance, benchmarking, energy master planning as needed, verify energy savings

4 Today s Presentation 1. Houston New School Construction Trends and Energy Efficiency Potential 2. CenterPoint Energy SCORE: Program Overview 3. Maximizing SCORE Benefits

5 Houston-Area School Growth Schools constructed 23.3 million Square footage of all new schools in this period 170,000 students Capacity of these new schools Source: Texas Comptroller s Office

6 Upcoming Bond Elections Katy ISD: $750 million Fort Bend ISD: $495 million Lamar CISD: $243 million Klein ISD and Conroe ISD: Considering 2015 bond proposals

7 Houston School Energy Costs $225 million Energy spend of Houston schools in $195 Average annual energy cost per student $1.44 Average annual energy cost per sq. ft.

8 Energy Efficiency Potential: Base case: $27.1 million in additional energy costs for new Houston-area schools With construction 10% more efficient than base, we could save $2,712,000 At 20%, $5,424,000 At 30%, $8,316,000 At 40%, $10,848,000

9 SCORE Overview K-12 and higher education customers Cash incentives for energy efficiency projects Additional (no cost) services to help schools get started: Benchmarking Energy Master Planning Technical Assistance Communications Support

10 Market Transformation SCORE aims to make energy efficiency practices standard in the NC marketplace SCORE addresses common barriers to EE Cost concerns Limited understanding of EE measures The SCORE program offers free energy efficiency consulting services during the new construction planning process

11 SCORE Program Approaches Deemed: Program estimates savings of measures such as HVAC and lighting based on drawings, submittals, and AHRI cert sheets based on pre-approved formulas and building profiles. Measurement & Verification (M&V): Program works with a third-party to estimate savings of measures that are not applicable for deemed savings, e.g. creating a building energy model to estimate energy usage.

12 SCORE Financial Incentives Measure Name $/kw $/kwh Lighting $125 $0.03 Lighting- LED $125 $0.06 HVAC- Chillers $175 $0.06 HVAC- DX $175 $0.04 Roofing $150 $0.06 Motors $175 $0.04 Variable Frequency Drives $150 $0.04 Window Film/Replacement $125 $0.04 Other/Custom* $175 $0.06

13 SCORE Lite Financial Incentives Measure Name $/kw $/kwh Lighting $120 $0.04 Lighting- LED $210 $0.08 HVAC- Chillers $260 $0.11 HVAC- DX $240 $0.09 Roofing $240 $0.09 Motors $235 $0.09 Variable Frequency Drives $180 $0.07 Window Film/Replacement $200 $0.08 Other/Custom* $175 $0.06

14 SCORE Program Results, Demand Savings (kw) Energy Savings (kwh/yr) Direct Incentives Paid ($) 30,858 82,200,000 $7,267,000

15 SCORE Program Results, 2014 (Expected) Demand Savings (kw) Energy Savings (kwh/yr) Direct Incentives Paid ($) 3,500 13,600,000 $1,360,000 New Construction Totals: Demand Savings (kw) Energy Savings (kwh/yr) Direct Incentives Paid ($) 947 4,600,000 $360,000

16 CenterPoint EE Program Portfolio Retro-Commissioning identifies no-cost or low-cost building tune-up measures that existing commercial and industrial customers can implement to reduce demand and energy use. Load Management awards incentives to commercial customers who can curtail load during specific demand events. Standard Offer Program awards incentives to approved service providers who install energy efficiency retrofit projects in commercial facilities.

17 Maximizing SCORE Benefits in New Construction

18 M&V Options

19 Whole Facility Option C Whole Facility Need both baseline and reporting period data Assess performance of the whole facility, retrofitted and nonretrofitted systems or areas Significant energy savings (10% or more of consumption measured by utility meter) Option D Calibrated Simulations When there is no meter (of facility) in the baseline Baseline data can be manufactured under controlled circumstances. Most expensive method and complicated

20 M&V Project Process Submit M&V Plan Construction Incentive Payment (40%) Submit M&V Savings Report Incentive Payment (60%) After 12 mo. Post Bills & Model Calibration

21 Bldg. Energy Performance (BEPS)

22 Bldg. Utility Performance (BEPU)

23 Utility & Fuel Use Summary (PB-S)

24 Calibrating Your Energy Model Efficient design + efficient operation = energy savings A note about commissioning

25 Project Spotlight, Partner/Measure Sheldon ISD/ Garrett Elem School Full M&V, Option D Energy Savings: 447,200 kwh/yr Demand Savings: 264 kw SCORE Incentive: $57,548

26 Project Spotlight, Partner/Measure Houston ISD/ Dogan Elem School Full M&V, Option D Energy Savings: 124,710 kwh/yr Demand Savings: kw SCORE Incentive: $14,627

27 Project Spotlight, Partner/Measure Galena Park ISD/ Cunningham Middle School Full M&V, Option C Energy Savings: 153,851kWh /yr Demand Savings: kw SCORE Incentive: $15,754

28 Optimization Strategies

29 Design Guides (Lighting, HVAC, Building Envelope)

30 Lighting Design Guides

31 Standard T8 Specifications lamp & ballast type F34T12CW & Energy Saving Magnetic catalog initial lumens catalog mean lumens CRI ballast factor (BF) mean lumens with BF # of lamps mean lumens system wattage mean lumens per watt lamp & ballast type Basic Grade 32W F32T8s & GEB (generic electronic ballast) catalog initial lumens catalog mean lumens CRI ballast factor (BF) mean lumens with BF 2,800 2, # of lamps mean lumens system wattage mean lumens per watt 1 2, , , , Footcandles (fc) = Total Lumens (lm) Area in Square Feet

32 HP and RW T8 2-Lamp Systems High Performance T8 2-Lamp Systems Ballast Options Catalog Initial Lumens Catalog Mean Lumens CRI Ballast Factor (BF) Lamp Mean Lumens With BF Lumen Maintenance # Of Lamps Mean Lumens System Wattage Mean Lumens Per Watt 2lamp-R ,233 95% Lamp-N ,523 95% Lamp-H ,900 95% Lamp-V ,422 95% Reduced WattageT8 2-Lamp Systems Lamp Options Catalog Initial Lumens Catalog Mean Lumens CRI Ballast Factor (BF) Lamp Mean Lumens With BF Lumen Maintenance # Of Lamps Mean Lumens System Wattage Mean Lumens Per Watt 25W ,963 95% W ,114 95% Footcandles (fc) = Total Lumens (lm) Area in Square Feet

33 Targeted Lighting Levels

34 Typical Classroom Example of lighting in renovation in an Classroom Classroom layout with 12 fixtures Area # of Fixtures Classroom 12 Fixture Type 3 lamp, 28W T8 Total Watts 1164 W Area (in sq feet) 1073 Power Average Density FC (W/SF) 1.1 W/SF Max FC Min FC Code allowed Power Density = 1.4 W/SF for a typical office Recommended footcandle levels, between 30 and 50 fc (IES recommendation)

35 Recommendation Recommend 2 lamp, 28W T8 system with low power ballast Area # of Fixtures Fixture Type Total Watts Area (in sq feet) Power Density (W/SF) Average FC Max FC Min FC Same number of fixtures, reduced number of lamps per fixture Classroom 12 2 lamp, 28W T8 516 W W/SF New Power Density meets code requirements Average Footcandle levels are within range of IES recommendations Windows on exterior wall will supplement light levels as well

36 Cost Analysis What does this mean in terms of cost? Simple Payback Calculation: Area Proposed # of Fixtures Proposed Fixture Type Proposed Total Watts Rec. # of Fixtures Rec. Fixture Type Rec. Total Watts Annual Op Hours Annual kwh Savings Electric Cost Savings at $0.08/kWh Incremental Labor per Fixture* Simple Payback Classroom 12 3 lamp, 28W T W 12 2 lamp, 28W T8 516 W $187 ($20) -1.3 O? R

37 Reduce Wattage T5HO: 47W - 51W MFG Model Mean Lumens Avg. Life 3hr Starts Watt per Lamp Standard T5HO RW-System Wattage Saving vs. Std. T5HO Savings vs. 400MH OSRAM PENTRON HO 47W/ES 4,380 30,000 47W 234W 206W 28W 242W GE T5HO Watt-Miser 47W 4,410 30,000 47W 234W 202W 32W 246W Philips F54T5HO EA/ALTO 49W 4,400 25,000 49W 234W 214W 20W 234W OSRAM LUMILUX HO 50W/ES 4,450 24,000 50W 234W 215W 19W 233W GE T5HO Watt-Miser 51W 4,600 25,000 51W 234W 216W 18W 232W Before 400MH After T5HO

38 Auditorium Lighting

39 Par30 Par38 LED 65-70W Halogen 2,000 6,000 Hrs Rated Life 14W-18W LED 25,000 Hrs Rated Life

40 MR16 LED 35W Halogen 2,000 6,000 Hrs Rated Life 7W-10W LED 25,000 Hrs Rated Life

41 HVAC Zoning and Controls

42 HVAC Code and Standards Baseline HVAC Equipment Description Tonnage Range Minimum Efficiency (ASHRAE or IECC 2009) New HVAC Equipment New Good Efficiency (CEE Tier 1) Efficiency Rating Small Packaged Systems & Roof-Top Units (Small DX) SEER SEER New Better Efficiency (CEE Tier 2) Efficiency Rating 1 Phase Split & Packaged < Phase Split & Packaged < Packaged and Split 5.42 to < Large Packaged Systems & Roof-Top Units (Large Dx) EER EER Large Air Conditioners ( & < Large Air Conditioners (20 20 to < Large Air Conditioners ( and up Air-Cooled Chillers with Condenser (AC Chiller) kw/ton kw/ton Air-Cooled with Condenser (<150) Air-Cooled with Condenser (150 < and up Water-Cooled Chillers (WC Chiller) kw/ton kw/ton Water-Cooled (<150) < Water-Cooled (150 to<300) 150 to < Water-Cooled (300 and up) 300 and up

43 HVAC After-Hours Usage Sporting Events After school activities Summer schedules Office hours

44 HVAC Zoning Optimization Office Auditorium Gyms Rest of School Use combinations of Chillers, DX or Heat Pumps to optimize zones.

45 Variable Refrigerant Flow (VRF) HVAC Systems

46 HVAC Controls Integrated HVAC occupancy controls Automatically adjust temperature set point when room is unoccupied Close damper of VAV boxes when no one is in the room

47 Thank you! Kristi Hardy, CenterPoint Energy (713) Michael Sciortino, CLEAResult (512) August Vega, CLEAResult (281)

48 Additional Information

49 Additional Information