PORTA CUSD Energy Savings Project

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PORTA CUSD Energy Savings Project
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Why Did PORTA Decide To Undergo Such A Large
Energy Project?
First a little history of our district, its
buildings and the financial reasons for
completing the project
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Facilities

• PORTA is a k-12 district with Four buildings.
• Jr.-Sr. High approx. 100,000 sq/ft all electric
  and 30 years old
• Central10 year old building, 50,000 sq/ft very
  ineffiecient
• ElementaryRemodeled building varies in age
  1960s to 1990s. Issues with Cooling system and
  moisture in building.

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Utilities Prior to 2007

• Jr.-Sr. HighAll electric, Prior to January 2007
  the yearly average electric utility bill equals
  12,000 per month.
• CentralAir conditioned and BoilerAverage
  monthly electric equals 6500 and natural gas
  equals 5500
• ElementaryAir conditioned and BoilerAverage
  Monthly electric equals 4600 and natural gas
  equals 4100

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DeregulationAffects on the District

• Deregulation takes affect January 2007.
• Does everyone know what deregulation was and how
  it affected your school?
• Ways PORTA combated deregulation.
• Meeting with electric supplier
• Bid electrical supplier
• Reduced costs from 12 cents per Kw to 9 cents as
  compared to 6 cents the in 2005-06 school year.

WHAT DOES THIS MEAN IN REAL .
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TOTAL COST TO EACH BUILDING

• Beginning in January 2007 electrical costs
  skyrocket.
• PORTA Jr-Sr HighAverage Electrical cost jump
  from 12,000 to over 24,000 per month
• CentralElectrical costs for Jan. 2006 equal
  4600 compared to just over 7000 for January
  2008.
• Elementary January 2006 electrical costs 2105,
  January of 2008 3604
• January 2006 Electric bill for Jr-Sr. High equals
  14,883 while January 2008 equals 33,156

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The District Acts

• With energy costs on the rise and the various
  buildings becoming more and more costly to
  maintain the Board of Education decides to
  investigate ways to reduce costs and manage
  future electrical needs.
• The district contracts with AMERSCO INC. to
  investigate energy saving solutions and provide
  multiple plans to help the district save funds.

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District Decisions

• Implement a Lighting Retrofit to make all
  district lighting more efficient
• Replace Electric Hot Water Heaters with Gas Fired
  Water Heaters at Junior Senior High School
• Install new DDC Controls at Junior Senior High
  School
• Recommission Controls at Central and Petersburg
  Elementary
• Replace Electric Heat RTUs with Geothermal Heat
  Pumps at the Junior Senior High School
• Install a 1 kW solar panel at the Junior Senior
  High School for educational purposes
• Install a 600 kW Wind Turbine to provide energy
  for the Junior Senior High School and Central
  Elementary

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Geothermal

• What is Geothermal?
• The earth absorbs 50 of the suns energy, so it
  stays at a constant temperature between 45-75
  degrees just 4-6 feet below the surface.
• Geothermal taps into this free energy stored in
  the earth to heat cool a building or home.
• Geothermal is safe, 400 more efficient than
  conventional natural gas or oil heating systems,
  provides healthy indoor air, and lasts for
  decades.

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How Does Geothermal Work?

• Geothermal works similar to a refrigerator using
  a pump to move heat stored in the earth through a
  looped system.
• In the summer, the pump extracts the heat from
  the conditioned space transferring it out to the
  earth loop.
• In the winter, the process is reversed by pumping
  heat from the earth moving it into the home or
  building.

Geothermal Model
Click to See
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Geothermal
Completed Summer of 2008 Replace Electric Heat
RTUs with Geothermal Heat Pumps at Junior
Senior High School
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Geothermal
Goal Provide Energy Efficient Heating and
Cooling
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Geothermal
Energy Savings 1,440,739 kWh per year
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Construction Implementation

• Completed Summer 2008
• Implement a Lighting Retrofit to make all
  district lighting more efficient
• Replace Electric Hot Water Heaters with Gas Fired
  Water Heaters at Junior Senior High School
• Install new DDC Controls at Junior Senior High
  School
• Recommission Controls at Central and Petersburg
  Elementary

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Solar Panel
Install a 1 kW solar panel at the Junior Senior
High School for educational purposes Goal
Encourage Learning in Engineering and Sciences
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What does our Solar Panel Do?
The Solar Panel seen outside the pool at the
Jr/Sr. High is comprised of six smaller panels.
In combination the panel can create 1Kw of
energy, which is fed directly into the school and
used as it is created. The main purpose for the
Solar panel is to provide learning opportunities
for the PORTA Students.
Solar Panel Information Link
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Wind Generator

• The final stages of the PORTA Energy Project
  included a 600Kw wind generator. The electricity
  generated by the turbine feeds directly into the
  Jr/Sr High building. Any electricity not used
  feeds directly onto the grid and the district
  receives credits for the surplus. There is no
  storage of electricity on site.

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Wind Turbine Generator
Completed August 2009 Install a 600 kW Wind
Turbine to provide energy for the Junior Senior
High School and Central Elementary
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Wind Turbine Generator
Goal Take Control of Energy Needs and Supplement
energy use
The Hub
The Nacelle
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Wind Turbine Generator
Energy Production 1,015,132 kWh per Year
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How does a Wind Turbine Work?

• Wind turbines operate on a simple principle. The
  energy in the wind turns two or three
  propeller-like blades around a rotor. The rotor
  is connected to the main shaft, which spins a
  generator to create electricity.
• Wind turbines are mounted on a tower to capture
  the most energy. At 100 feet (30 meters) or more
  above ground, they can take advantage of faster
  and less turbulent wind.
• Wind turbines can be used to produce electricity
  for a single home or building, or they can be
  connected to an electricity grid (shown here) for
  more widespread electricity distribution.

Office of Energy Efficiency and Renewable Energy.
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How does a Wind Turbine Work?
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Inside a Wind Turbine
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The Various Parts of the Wind Turbine.

• Anemometer Measures the wind speed and transmits
  wind speed data to the controller.
• Blades Most turbines have either two or three
  blades. Wind blowing over the blades causes the
  blades to "lift" and rotate.
• Brake A disc brake, which can be applied
  mechanically, electrically, or hydraulically to
  stop the rotor in emergencies.
• Controller The controller starts up the machine
  at wind speeds of about 8 to 16 miles per hour
  (mph) and shuts off the machine at about 55 mph.
  Turbines do not operate at wind speeds above
  about 55 mph because they might be damaged by the
  high winds.
• Gear box Gears connect the low-speed shaft to
  the high-speed shaft and increase the rotational
  speeds from about 30 to 60 rotations per minute
  (rpm) to about 1000 to 1800 rpm, the rotational
  speed required by most generators to produce
  electricity. The gear box is a costly (and heavy)
  part of the wind turbine and engineers are
  exploring "direct-drive" generators that operate
  at lower rotational speeds and don't need gear
  boxes.

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The Various Parts of the Wind Turbine

• Generator Usually an off-the-shelf induction
  generator that produces 60-cycle AC electricity.
  High-speed shaft Drives the generator. Low-speed
  shaft The rotor turns the low-speed shaft at
  about 30 to 60 rotations per minute.
• Nacelle The nacelle sits atop the tower and
  contains the gear box, low- and high-speed
  shafts, generator, controller, and brake. Some
  nacelles are large enough for a helicopter to
  land on.
• Pitch Blades are turned, or pitched, out of the
  wind to control the rotor speed and keep the
  rotor from turning in winds that are too high or
  too low to produce electricity.
• Rotor The blades and the hub together are called
  the rotor.
• Tower Towers are made from tubular steel (shown
  here), concrete, or steel lattice. Because wind
  speed increases with height, taller towers enable
  turbines to capture more energy and generate more
  electricity.

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The Various Parts of the Wind Turbine

• Wind direction This is an "upwind" turbine,
  so-called because it operates facing into the
  wind. Other turbines are designed to run
  "downwind," facing away from the wind.
• Wind vane Measures wind direction and
  communicates with the yaw drive to orient the
  turbine properly with respect to the wind.
• Yaw drive Upwind turbines face into the wind
  the yaw drive is used to keep the rotor facing
  into the wind as the wind direction changes.
  Downwind turbines don't require a yaw drive, the
  wind blows the rotor downwind.
• Yaw motor Powers the yaw drive.

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Wind Turbine Blades
Just like the wings of an airplane, wind turbine
blades use the airfoil shape to create lift and
maximize efficiency.
The PORTA Wind Turbine Blades are 28 meters, just
about 92 ft.
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Yawing Facing the Wind

• Active Yaw (all medium large turbines produced
  today, some small turbines from Europe)
• Anemometer on nacelle tells controller which way
  to point rotor into the wind
• Yaw drive turns gears to point rotor into wind

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The Future of Wind Power
Currently, W. European countries produce 2 of
their overall electricity through wind power.
Within 10 years, these countries expect to get at
least 10 of their electricity from wind
turbines. By 2025, the German government intends
to get 25 of their electricity from wind
turbines. Wind energy is the worlds
fastest-growing energy source and will power
industry, businesses, and homes with clean,
renewable electricity for many years to come.
(http//eereweb.ee.doe.gov/windandhydro/wind_histo
ry.html)
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Modern Wind Turbine

• Commercial wind energy is one of the most
  economical sources of new electricity available
  today. Wind turbines can be set up quickly and
  cheaply compared with building new coal-fired
  generating stations or hydroelectric facilities.
  Modern wind generating equipment is efficient,
  highly reliable, and becoming cheaper to
  purchase. The environmental impact of large wind
  turbines is negligible compared with an open pit
  coal mine or a reservoir, and during their
  operation produce no air pollution. Because of
  these factors, wind energy is recognized as the
  world's fastest-growing new energy source.

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Questions and Answers

• How much did the project cost?
• Does the turbine shut down when energy is not
  being used?
• Does the Turbine turn into the wind on its own?
• How tall is the Turbine?

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Questions and Answers
What is the life span of the Turbine? How much
money does the Geothermal save the district? How
much will the energy project save yearly?
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Questions
Matt Brue, Superintendent PORTA CUSD 202 17651
Bluejay Road Petersburg, IL 62675 mbrue_at_porta202.o
rg