The View from 93, 000 Miles Carol Blevins Ormay, MA Principal, Director of Business Development Brian Turner, PE Electrical Engineer
About Us Top 60 MEP Consulting Engineering firm Established in 1968 Specializing in energy efficient design
Recognized Expertise Greenbuild, Toronto Eight Annual Government Building Energy Efficient Technology Workshop, Chicago Net Zero Energy Conference, Savannah SAME Association for the Advancement of Sustainability in Higher Education (AASHE), Indianapolis Council of Educational Facilities Planners International (CEFPI), Washington, DC School Building Expo, Pittsburgh American Society of Heating, Refrigerating and Air-Conditioning Engineers’ (ASHRAE) Net Zero Conference, San Francisco Building Industry Consulting Service International Annual Conference (BICSI), Las Vegas ASHRAE’s High Performance Schools Conference. Atlanta Midwest Healthcare Engineers, Indianapolis Lightfair International in Philadelphia Greening the Heartland (USGBC Regional Conference), Cincinnati
National Experience
Why the view from 93, 000 miles?
Learning Objectives To discover how public school districts are implementing Net Zero Energy principles To learn how energy efficiency is integrated into the curriculum To explore the various types of solar PV options
What is Net Zero? 1. Annual Net Energy Cost 2. Zero Carbon Footprint 3. Site Consumed vs. Site Produced Annual Energy Used Expressed in k. Btu/sf/yr Units = Energy Use Index (EUI)
Site Produced Energy
Net Zero – Our Philosophy 1. Exhaustive study of building’s energy use. 2. Set an annual energy consumption goal to create a financial model. 3. Discuss Green Power Generation.
Making Site Produced Energy Practical
Net Zero – Our Philosophy VS
Let’s Talk Affordability
Net Zero – Schools Richardsville Elementary – – 72, 000 sf 349 k. W solar PV 17. 6 k. Btu/sf yr $206/sf w/solar PV – 75% EUI Reduction
Net Zero – Schools Turkey Foot Middle School – – 133, 000 sf 22 k. Btu/sf yr 385 k. W solar PV (phase I) $204/sf w/solar PV – 70% EUI Reduction
Integrating Buildings Into the Curriculum
Twenhofel Middle School - 2007
Madeira City Schools - 2010
Cartmell Elementary - 2011
Richardsville Elementary - 2011
Turkey Foot Middle School
Designing Turkey Foot Middle School
Designing Turkey Foot Middle School
Designing Turkey Foot Middle School
Turkey Foot Middle School - STEM Below are some of the questions students are currently researching about our Photovoltaic System (Solar Panels). – – – When is the peak solar electric output during a day? Is solar electric output effected by the outside temperature? How does the solar output change due to angle of the sun? Does humidity effect solar panel output? How does the sun's irradiance correlate to the electrical output of solar panels? Students compare lab data with outside roof and weather data to see if what occurs in their classroom experiment also occurred outside on the roof top PV system. Students then make a prediction for Kwh output for our school's PV system 3 days in the future by using their experimental data and the lab / roof data they analyzed. http: //www. middlematters. com/9. html
Turkey Foot Middle School - Tour http: //www. youtube. com/watch? v=oj. Eqeve. HCyc&nor edirect=1
Solar PV – What’s New?
174, 000, 000 KW The Earth has 174 PW of available solar power! Capacity equivalent to 300 million coal power plants!
Typical Grid-Tied System
Photovoltaic Effect Electrons/holes migrate away from p-n junction Different from photoelectric effect in that electrons are not ejected but are mobilized from the valence to the conduction band which forms voltage potential between contacts
Crystalline vs. Thin Film High Efficiency Heavy Output highly dependent on temperature Made from Silicon Lower Efficiency Lightweight Performs better in hot climate Often uses rare Earth metals
Photovoltaic Arrays
Inverters What do they do? • Convert DC electricity to AC electricity • Transform from <600 V to 277/480 or 120/208 • Sync frequency and phase to grid • Monitor performance
Choosing Panel Tilt Angle Louisville, KY = 38° West Lafayette, IN = 40° Equator = 0° North/South Poles = 90°
PV Capacity by Year
PV System Cost
Future Trends
The Perfect Solar Panel
Useful Resources PV Watts http: //rredc. nrel. gov/solar/calculators/PVWATTS/version 1 NREL nrel. gov Photon Magazine DSIRE (Incentives by state) dsireusa. org Berkeley Lab lbl. gov National Clearing House for Educational Facilities http: //www. ncef. org/rl/impact_learning. cfm? date=2 Advanced Energy Design Guide – ASHRAE Indiana incentives http: //www. dsireusa. org/incentives/index. cfm? get. RE=1? re=undefined&ee =1&spv=0&st=0&srp=1&state=IN
Questions? www. cmtaegrs. com carol@cmtaegrs. com bturner@cmtaegrs. com 502 -326 -3085
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