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Architect and Engineer

Lunch and Learn

September 30, 2014

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

Team Roles

Program Administrator

Fund & market programs, conduct post inspections,

administer incentive payments

Program Implementer

Conduct outreach, provide technical assistance,

benchmarking, energy master planning as needed,

verify energy savings

Today’s Presentation

1. Houston New School Construction Trends

and Energy Efficiency Potential

2. CenterPoint Energy SCORE:

Program Overview

3. Maximizing SCORE Benefits

Houston-Area School Growth

2007-2013

169 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

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

Houston School Energy Costs

$225 million Energy spend of Houston schools in 2013-2014

$195 Average annual energy cost per student

$1.44 Average annual energy cost per sq. ft.

Energy Efficiency Potential:

2015-2020

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

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

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

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.

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

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

SCORE Program Results,

2006-2013

Demand

Savings

(kW)

Energy Savings

(kWh/yr)

Direct

Incentives Paid

($)

30,858 82,200,000 $7,267,000

SCORE Program Results,

2014 (Expected)

Demand

Savings

(kW)

Energy Savings

(kWh/yr)

Direct

Incentives Paid

($)

3,500 13,600,000 $1,360,000

Demand

Savings

(kW)

Energy Savings

(kWh/yr)

Direct

Incentives Paid

($)

947 4,600,000 $360,000

New Construction Totals:

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.

Maximizing SCORE Benefits in New Construction

M&V Options

Whole Facility

Option C – Whole Facility

• Need both baseline and reporting period data

• Assess performance of the whole facility, retrofitted and non-retrofitted 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

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

Bldg. Energy Performance (BEPS)

Bldg. Utility Performance (BEPU)

Utility & Fuel Use Summary (PB-S)

Calibrating Your Energy Model

Efficient design + efficient operation =

energy savings

A note about commissioning…

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

Project Spotlight,

Partner/Measure

Houston ISD/

Dogan Elem School

Full M&V, Option D

Energy Savings:

124,710 kWh/yr

Demand Savings:

40.83 kW

SCORE Incentive:

$14,627

Project Spotlight,

Partner/Measure

Galena Park ISD/

Cunningham

Middle School

Full M&V, Option C

Energy Savings:

153,851kWh /yr

Demand Savings:

64.00 kW

SCORE Incentive:

$15,754

Optimization Strategies

Design Guides

(Lighting, HVAC, Building Envelope)

Lighting Design Guides

3

0 © CLEAResult,

2014

Standard T8 Specifications

lamp &

ballast

type

catalog

initial

lumens

catalog

mean

lumens

CRI ballast

factor (BF)

mean

lumens

with BF

# of lamps mean

lumens

system

wattage

mean

lumens

per watt

Basic

Grade 32W

F32T8s &

GEB

(generic

electronic

ballast)

2,800 2,590 75 - 78 0.88 2279

1 2,279 30 76

2 4,558 58 79

3 6,838 87 79

4 9,117 114 80

lamp &

ballast

type

catalog

initial

lumens

catalog

mean

lumens

CRI ballast

factor (BF)

mean

lumens

with BF

# of lamps mean

lumens

system

wattage

mean

lumens

per watt

F34T12CW

& Energy

Saving

Magnetic

2650 2300 62 0.89 2047

1 2047 44 47

2 4094 72 57

3 6141 116 53

4 8188 144 57

Footcandles (fc) = Total Lumens (lm) ÷ Area in Square Feet

HP and RW 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 3100 2900 82 - 86 0.77 2,233 95% 2 4466 48 93.0

2Lamp-N 3100 2900 82 - 86 0.87 2,523 95% 2 5046 53 95.2

2Lamp-H 3100 2900 82 - 86 1.00 2,900 95% 2 5800 62 93.5

2Lamp-V 3100 2900 82 - 86 1.18 3,422 95% 2 6844 73 93.8

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 2400 2256 82 - 86 0.87 1,963 95% 2 3925 43 91.3

28W 2585 2430 82 - 86 0.87 2,114 95% 2 4228 48 88.1

High Performance T8 2-Lamp Systems

Reduced WattageT8 2-Lamp Systems

Footcandles (fc) = Total Lumens (lm) ÷ Area in Square Feet

Targeted Lighting Levels

http://eeref.engr.oregonstate.edu/@api/deki/files/993/

Typical Classroom

• Example of lighting in renovation in an Classroom

• Classroom layout with 12 fixtures

• Code allowed Power Density = 1.4 W/SF for a typical office

• Recommended footcandle levels, between 30 and 50 fc (IES recommendation)

Area # of

Fixtures Fixture

Type Total Watts

Area (in sq feet)

Power Density (W/SF)

Average FC

Max FC Min FC

Classroom 12 3 lamp, 28W T8

1164 W

1073 1.1

W/SF 39 47 24

Recommendation

• Recommend 2 lamp, 28W T8 system with low power ballast’

• Same number of fixtures, reduced number of lamps per fixture

• 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

Area # of

Fixtures Fixture Type

Total Watts

Area (in sq feet)

Power Density (W/SF)

Average FC

Max FC Min FC

Classroom 12 2 lamp, 28W T8

516 W 1073 0.5 W/SF 31 38 19

Cost Analysis

What does this mean in terms of cost?

Simple Payback Calculation:

O

R

?

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 T8

1164 W 12 2 lamp, 28W T8

516 W 3600 2333 $187 ($20) -1.3

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

Auditorium Lighting

Par30 – Par38 LED

65-70W Halogen

2,000 – 6,000 Hrs Rated Life

14W-18W LED

25,000 Hrs Rated Life

MR16 LED

35W Halogen

2,000 – 6,000 Hrs Rated Life

7W-10W LED

25,000 Hrs Rated Life

HVAC Zoning and Controls

HVAC Code and Standards

Baseline HVAC Equipment New HVAC Equipment

Description Tonnage

Range

Minimum Efficiency

(ASHRAE 90.1 2007

or IECC 2009)

New Good Efficiency (CEE Tier 1)

New Better Efficiency (CEE Tier 2)

Efficiency Rating Efficiency Rating

Small Packaged Systems & Roof-Top Units (Small DX) SEER SEER

1 Phase Split & Packaged < 5.42 13.000 15.000 16.500

3 Phase Split & Packaged < 5.42 13.000 14.000 15.000

Packaged and Split 5.42 to <

11.25 11.000 11.500 12.000

Large Packaged Systems & Roof-Top Units (Large Dx) EER EER

Large Air Conditioners (11.25 11.25 & < 20 10.800 11.500 12.000

Large Air Conditioners (20 20 to < 63.33 9.800 11.500 12.000

Large Air Conditioners (63.33 63.33 and up 9.500 9.700 10.200

Air-Cooled Chillers with Condenser (AC Chiller) kW/ton kW/ton

Air-Cooled with Condenser

(<150) < 150 1.255 1.212 1.180

Air-Cooled with Condenser

(150 150 and up 1.255 1.212 1.180

Water-Cooled Chillers (WC Chiller) kW/ton kW/ton

Water-Cooled (<150) <150 0.703 0.663 0.639

Water-Cooled (150 to<300) 150 to < 300 0.634 0.586 0.541

Water-Cooled (300 and up) 300 and up 0.577 0.541 0.500

HVAC After-Hours Usage

• Sporting Events

• After school

activities

• Summer schedules

• Office hours

HVAC Zoning Optimization

• Office

• Auditorium

• Gyms

• Rest of School

Use combinations of

Chillers, DX or Heat

Pumps to optimize

zones.

Variable Refrigerant Flow (VRF)

HVAC Systems

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

Thank you!

Kristi Hardy, CenterPoint Energy (713) 207-6974

Krisit.Hardy@centerpointenergy.com

Michael Sciortino, CLEAResult (512) 583-3748

Michael.Sciortino@CLEAResult.com

August Vega, CLEAResult (281) 902-1155

August.Vega@CLEAResult.com

Additional Information

www.centerpointefficiency.com

Additional Information

www.eeprograms.net

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