NCAT- Butte 3040 Continental Drive

P.O. Box 3838Butte, MT 597021-866-723-8677www.ncat.org

Pursuing Energy Conservation Opportunities

in YOUR School

Start with an Energy Audit

Introduction

• Dave Houser, P.E. ~ Director of Business Development-Energy Services, NCAT

• Tom Pelletier ~ Energy Efficiency Marketing Specialist, NCAT

• NCAT Background and Services• Non-profit• Sustainability• Energy + Agriculture• NWE Program Contractor• 30+ Years Experience

NCAT Role

• NWE Program Contractor

• Marketing

• Project Facilitation

• Engineering Analysis

Topics of Discussion

• Understanding Energy Usage

• Recognizing Savings Opportunities

• Why get an audit? • How do you get there from here?

Understanding Energy Usage

Energy Usage in a Typical Montana School

21%

3%

5%

2%

58%

5%6%

Lighting

Office Equipment

Other

Refrigeration

Space Heating

Ventilation

Water Heating

Energy Conservation Strategies

• Lower wattage lighting and lighting controls

• Advanced HVAC controls• Upgrading process equipment• Building Envelope

Improvements• Maintenance of existing

equipment• Reduced operating hours

Case study ~ Large GymnasiumExisting Condition• Approximately 13,000 Square Feet• Fifty 400-Watt Metal Halide Fixtures• 50 Foot-Candles @ 1.73 Watts / Sq. Ft.• Estimated Lighting Cost - $10,300 /Yr

Recommend Conversion to Fifty 4-lamp T5HO/WM Fixtures with Occupancy Sensors on each Fixture

• 42 Foot-Candles @ 0.83 Watts / Sq. Ft.• Retrofit Cost Estimate - $ 25,000• Annual Bill Savings - $7,000• Utility Rebate - $7,500• Simple Payback 2.5 Years• Larger Facilities • Higher Light Levels

Case study ~ Small GymnasiumExisting Condition• Approximately 6,500 Square Feet• Sixteen 400-Watt Metal Halide Fixtures• 30 Foot-Candles @ 1.11 Watts / Sq. Ft.• Estimated Lighting Cost - $3,300 / Year

Recommend Conversion to Sixteen 4-lamp T5HO/WM Fixtures with Occupancy Sensors on each Fixture

• 26 Foot-Candles @ 0.5 Watts / Sq. Ft.• Retrofit Cost Estimate - $ 8,000• Annual Bill Savings - $2,200• Utility Rebate - $2,400• Simple Payback - 2.6 Years

Case study ~ ClassroomExisting Condition• Approximately 1,000 Square Feet• Eight 4-lamp 32 Watt T8 Fluorescent

Fixtures• 50 Foot-Candles @ 0.9 Watts / Sq. Ft.• Estimated Operating Cost - $400 / Year

Recommend Conversion to 25 Watt T8 Fixtures with one Classroom Occupancy Sensor

• 45 Foot-Candles @ 0.7 Watts / Sq. Ft.• Retrofit Cost Estimate - $ 300• Annual Bill Savings - $ 200 / Year• Utility Rebate - $ 100• Simple Payback – 1 Year

Comprehensive School Retrofit

Existing Condition• Estimated Annual Energy

Consumption: 704,809 KWh• Obsolete building controls• Dual duct system with air

mixing at constant volume• Standard efficiency motors • Inefficient lighting • No lighting controls• Oversized and aged boilers

Recommend Conversion HVAC system Improvements• Dual Duct air system modifications

• Control upgrade• VAV conversion• 60 Hp Supply and 20 Hp return fan motor replacement• CO2 sensor in return air duct to control outdoor air• New motor and VFD on CP-1 pump

Gymnasium HV system improvements• Modify ventilation units for one unit to run most of the time• Install variable frequency drives • Replace motors with premium efficiency motors • Install CO2 sensors to control ventilation• Reduce locker room exhaust; balance air systems

Replace 32 Watt T-8 lamps with 25 Watt T-8 lamps

Comprehensive School Retrofit

Annual Energy Savings• 47,138 KWh electricity = $16,940/yr• 567.8 DKT of natural gas =$6,960/yr • $23,900 per year

Estimated Project Cost• HVAC measures = $67,315• Lighting retrofit = $25,312 • Total estimated project cost = $92,627• Simple payback without rebates = 3.9 yrs• Rebates =$2,531• Simple payback with rebates = 3.76 years

Why get an Audit?

• Identify action items and incentives

• Defend taking further action

• Not to keep dust off the shelf

How do you get there from here?

• Define the project scope• Obtain buy-in/board approvals• Communicate project economics• Project financing options• Identifying qualified contractors• Competitive bidding• Construction oversight

Investor-Owned Energy Company Incentives

Service Offered

Northwestern Energy

Montana Dakota Utilities

Free Commercial Energy Audit

Yes No

Commercial Lighting Rebate Program

Yes Yes

Federal Administration

• Bonneville Power Administration

• Commercial Technical Services• Commercial and Industrial

Lighting Rebates

• Western Area Power Administration

• Commercial Technical Services

Montana Electric Cooperatives

Free Energy Audits• Flathead Electric Cooperative • Glacier Electric Cooperative

Lighting Rebate Programs• Flathead Electric Cooperative • Glacier Electric Cooperative• Lincoln Electric Cooperative

Next Steps

• Energy Audit Break out Sessions

• 8:30-9:15 am ~ NCAT & Northwestern Energy• 10:20-11:05 am ~ NCAT & Northwestern Energy

• 9:25-10:10 am ~ Western Utilities• 11:15-12:00 noon ~ Eastern & Central Utilities

NCAT- Butte 3040 Continental Drive

P.O. Box 3838Butte, MT 59702

406-494-4572www.ncat.org