CenterPoint Energy Process Efficiency Program

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Chandan Rao

5/25/2016

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Process Efficiency Program Overview

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3-Phase Approach & Outcomes

Participation in a no-cost, one-day EnVinta session based on the One-2-Five energy management model

High-level, walk-through, audit

Develop an energy action plan

Utilize engineering and technical support to clarify technical opportunities May qualify for 75% or more of the cost of engineering support

Acquire pre-approvals where necessary

Selecting system improvements

setting a timeline for installation

PE Program drives Strategic Energy

Management Objectives

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Energy Management Diagnostic Elements

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Purchased Utilities

ElectricAnnual

Annual Consumption, Unit Cost,

Billing Period Cost, $ kWh $/kWh Min Max Avg Min Max Avg

Apr'14 - Mar'15 $564,950 6,579,698 $0.086 1,121 1,313 1,206 15,924 20,133 18,027

GasAnnual

Annual Consumption, Unit Cost,

Billing Period Cost, $ mmBtu $/mmBtu Min Max Avg

Apr'14 - Mar'15 $239,137 41,660 $5.740 88 182 115

Total Annual Cost$804,087

Peak Demand, kW Consumption Per Day, kWh/day

Usage Per Day,

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Purchased Utilities

Electric

Gas

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Purchased Utilities

Dips in Winter

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Preliminary Energy Usage Allocations

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Overall Savings Potential for Sample Site

Electricity kWh/Yr % Of Total Cost

Min Savings

Range

Max Savings

Range

Min Savings

Range

Max Savings

Range

Min Savings

Range

Max Savings

Range

Die Casting 2,562,000 39% $219,980 5% 10% $10,999 $21,998 128,100 256,200

HVAC 1,848,840 28% $158,746 7% 15% $11,112 $23,812 179,340 384,300

Compressed Air 529,332 8% $45,450 15% 25% $6,817 $11,362 384,300 640,500

Lighting 506,880 8% $43,522 25% 60% $10,881 $26,113 640,500 1,537,200

Other 380,503 6% $32,671 - - - - - -

Tower Water 367,759 6% $31,577 15% 30% $4,737 $9,473 384,300 768,600

Machining 281,250 4% $24,149 2% 5% $483 $1,207 51,240 128,100

Vacuum 70,497 1% $6,053 10% 20% $605 $1,211 256,200 512,400

Waste Water Treatment 32,638 0% $2,802 10% 20% $280 $560 256,200 512,400

$564,950 $45,914 $95,737 2,023,980 4,227,300

8% 17%

Gas

MMBtu /

% Total Cost

Min Savings

Range

Max Savings

Range

Min Savings

Range

Max Savings

Range

Min Savings

Range

Max Savings

Range

MMBtu/Yr

Melting Furnaces

Ladle heaters

8,839 MMBtu/Yr

21% Space Heating

$239,137 $19,568 $48,555

8% 20%

Min Max

Total $65,482 $144,292 /Yr

8% 18%

Percent Cost Energy

1,641 4,923

1,768 3,536

Percent Cost Energy

5% 15% $28,260

20%

$9,420

40% $10,148 $20,296

32,821

79%

Base

Variable

$188,398

$50,739

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Savings Potential Drill Down

Approx 7% to 22% Energy Cost Savings

Potential

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Questions

Thank you

President, Graphet Inc

Over 25 years of experience in energy conservation for the large and mid industrial and commercial sectors

Energy teams facilitation and development of long-term plans for sustainability

Expertise in evaluation/optimization of compressed air systems, industrial ventilation systems and process heating & cooling systems

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