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2012 ISCN Symposium - Energy Optimization at Central Michigan University 2012

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• Completed 11 Buildings

• Before: 43,800 watts

• After: 7,592 watts

• Total wattage reduction – 83%

• Annual Savings: $26,318

Alumni House Anspach Hall Dow Science

Grawn Hall Moore Hall Rowe Hall

University Center Warriner Hall Campbell Hall

Kesseler Hall Kulhavi Hall

Replace incandescent bulbs

with LED lights – Kesseler,

Kulhavi & Campbell Halls

Rebate for $600 has been submitted

# LightsReplaced

Location Change PercentReduction

42 Hallways 90 watt to 8 watt 91%

18 Deskareas

20 watt to 6 watt

70%

# Lights Replaced

Location Change Percent Reduction

107 Auditorium, Extended Hrarea, Elevators

50 watt incandescent to 6 watt LED

88%

Park Library

Filed for Rebate

Replaced T-12

lights to more

energy efficient T-8

lights in ET Building

Total Cost: $108,499

Savings/Yr: $35,385

Rebate: $20,035

ROI: 40%

Currently replacing lights

in Grounds South Building

Installed motion sensors for interior

lighting in classrooms, hallways,

auditoriums and restrooms.

Anspach Dow Foust ET Grawn IAC Moore Music Pearce

Cost $28,500 $75,541 $32,884 $12,376 $23,260 $24,509 $60,000 $25,400 $30,500

Estimated

Annual

Savings

$7,198 $33,425 $9,500 $8,400 $7,000 $5,800 $20,000 $6,800 $7,625

ROI 32% 58% 31% 86% 41% 28% 37% 36% 30%

Rebate $5,767 $18,659 $2,542 $2,570 $6,322 $3,377 $9,001 $6,640 $5,219

Installing computer

Power Save software

throughout campus. To

date, 2,147 copies of

software in use.

Funded by Facilities

Management – Implemented

by Information Technology

Cost $28,000

Estimated Annual Savings $100,000

ROI 350%

Replaced old pneumatic thermostats with wireless radio controlled

Building Complete: ET Building & Central Energy Facility

Cost: $28,934 Estimated Annual Savings: $7,000 ROI – 24%

Installed 2,330

radiator valves in

Merrill Quad, Robinson

Quad & the Towers

Cost $394,743

Estimated Annual Savings

$159,077

ROI 48%

Rebate $61,785

• Monitors Carbon

Dioxide (CO2)levels in

occupied spaces

• Work completed by

HVAC Department

• 98% of campus

buildings complete

• Average cost each air

handler - $700

• ROI – less than 1 year

or 100%

Reduce kitchen

hood exhaust rate

in all dining

commons

Cost $50,000

Potential Energy Savings

$26,534

ROI 53%

Installed 0.5 gpm aerators on 4,500 faucets

throughout campus

Cost $9,000

Estimated Annual Savings $58,000

ROI 640%

Installed low flow flush valves on toilets &

urinals throughout campus (650 toilets & 220 urinals)

Cost $17,500

Estimated Annual Savings $11,250

ROI 65%

Campus Aerator & Flush Valve

Installation

•The steam absorption chiller

produces chilled water for cooling.

•Steam is produced by the wood

fueled boiler—a renewable resource

•Displaces an electric powered chiller

•Higher steam demands allow more

electric generation

Cost $45,000

Estimated Annual Savings $584,000

ROI 1,298%

• Energy Rebates Received FY 11 - $99,365• Consumers Energy

• DTE/Mich Con

• Alternative Fuels• Biomass (Wood)- Wood vs. natural gas cost avoidance since

started in 2001 $10,679,000. Yearly average - $1,525,600

• Geo-thermal – Installed system for Academic Center on

Beaver Island compared to heating with fuel oil

• FY to date cost avoidance $33,570

• Solar – Installed 64 evacuated tub solar panels on the EHS

building roof. Lowers Carbon Footprint by 45 metric tons.

Estimated annual savings: $25,000

Started 3.2 MW GasTurbine/Generator

• Lowers Carbon Footprint by 11% or 9,500

metric tons by self-generating 55-60% of

total campus electric requirements

• November 2010 – October 2012

estimated savings - $800,000

Currently negotiating electric contract

extension for 2013 and 2014 with estimated

cost avoidance of $290,000 vs. the 2012

rate