ENERGY MANAGEMENT AT NORTHLANDS PARK

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ENERGY MANAGEMENT AT NORTHLANDS PARK

• Prepared by Mark Wiesner
• Northlands Park
• Trade Services

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Facility / Organizational Detail

• Multi-building exhibition facility that occupies
  126 acres of land.
• Organization founded in 1879.
• Second largest tourism attraction in Edmonton.
• Host of more that 3.5 million guests per year.
• Takes a lead role in promoting Albertas
  agricultural industry.
• Economic impact to the City of Edmonton is 400
  million dollars.

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Facility / Organizational Detail Contd.

• Over 200 full time staff, 1,235 part time staff
  and 700 volunteers.
• Annual staff salary in excess of 18 million
  dollars.
• Eighteen buildings on site that occupy in excess
  of 1.5 million square feet of floor space.
• Included within the facilities is stabling for
  1,300 horses and living accommodation for up to
  150 horse racing support staff.

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Energy Management

• Identified as a priority in 1984 when a facility
  energy audit was conducted by Alberta Energy
  Efficiency.

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Energy Management System

• Is the cornerstone of energy management efforts
  at Northlands Park.
• Siemens System 600 microprocessor based
  distributed control system.
• The system consists of field cabinets located in
  each building controlled from one central
  location.
• There are a total of 100 field cabinets and 224
  terminal controllers linked by a fiber optic
  network.

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Energy Management System Contd.

• Installation of the system was based on the need
  for central control of lighting, heating,
  ventilating, air conditioning and ice making
  systems.
• System installation began in October of 1987 and
  proceeded in yearly phases until 1993.
• Software programming has been developed to meet
  the specific needs of systems within our
  facilities.
• The system is manned by building control
  operators sixteen hours a day, seven days a week.

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Energy Management System Contd.

• Total capital investment to date has been 1.6
  million dollars.
• Estimated utility cost avoidance to date is in
  excess of 3 million dollars.

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Energy Management Methods and Control Strategies

• 1. Equipment Scheduling
• The energy management system gives the user the
  ability to easily control the use of equipment
  within a facility.
• Efficient scheduling of equipment results in
  energy savings.
• Only run the equipment when necessary and make
  efficient use of energy while the equipment is
  operating.

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Energy Management Methods and Control Strategies
Contd.

• 1. Equipment Scheduling Contd.
• The change from manual equipment operation to
  microprocessor based control has had the greatest
  effect on overall energy savings.

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Energy Management Methods and Control Strategies

• 2. Night Setback and Low Limit Control
• During winter months when areas within a facility
  are unoccupied, equipment is scheduled off and
  cycles as necessary to maintain a pre-determined
  low limit temperature set point.

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Energy Management Methods and Control Strategies

• 3. Mixed Air Control
• Ventilation systems use a combination of outside
  air and space return air to create mixed air. We
  have found it more efficient to allow the mixed
  air temperature set point to be software reset
  from the actual space temperature.

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Energy Management Methods and Control Strategies

• 4. Space Pre-Conditioning
• During the heating and cooling season, we make
  use of outside air for free cooling on a regular
  basis. A good example of this is
  pre-conditioning for an NHL hockey game at
  Skyreach Centre.
• On a game day, fan systems as required will start
  at 0100 to reduce the arena space temperature.
  The optimum game start temperature is 17 to 17.5
  degrees C and this temperature is critical for
  maintaining good hockey ice conditions.

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Energy Management Methods and Control Strategies

• 5. Equipment Duty Cycle
• A software program has been developed that duty
  cycles exhaust systems on an exhaust level
  requirement basis. The total number of exhaust
  fans operating at any given time may depend on
  the difference between a space temperature and
  set point.

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Energy Management Methods and Control Strategies

• 6. Lighting Efficiency and Control
• Ninety percent of the lighting systems are
  controlled by the energy management system.
• The system can control illumination level using
  multiple light levels and dimming capability.
• A software program has been developed that gives
  us the ability to reduce hall lighting levels
  during an event without any noticeable change.

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Energy Management Methods and Control Strategies

• 7. Occupancy Sensors
• Are used for reducing energy consumption in areas
  used on a more infrequent basis during event and
  non-event periods (example - washrooms).

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Energy Management Methods and Control Strategies

• 8. Boiler and Domestic Hot Water Control
• A software program has been developed that
  initiates automatic boiler shutdown and warm up
  based on outside air temperatures.
• This program saves energy during the spring and
  fall when heating water is not required 24 hours
  per day.

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Energy Management Methods and Control Strategies

• 8. Boiler and Domestic Hot Water Control
  Contd.
• A combustion trim system has been installation
  the Skyreach Centre, 400 horsepower primary
  heating water boilers to increase boiler
  efficiency and reduce gas consumption.
• The domestic hot water temperature set point is
  automatically reduced at night and during
  non-event or unoccupied periods.

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Energy Management Methods and Control Strategies

• 9. Thermal Storage Systems (Cold Storage)
• Two ice on tube storage systems are used on site.
• The storage systems are located at the Spectrum
  and Sportex.
• Ice is built to tube bundles in a water bath.
• The Sportex system consists of two 16,000 gallon
  water tanks and the Spectrum consists of one
  80,000 gallon water tank.

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Energy Management Methods and Control Strategies

• 10. Heat Recovery
• Waste Heat from the Skyreach Centre ammonia ice
  plant is used to melt approximately 1,000 cubic
  feet of snow removed daily during ice
  maintenance.
• Prior to installation of the snow melt system, a
  one-inch water hose supplying 40 GPM of domestic
  hot water was used to melt this snow.

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Energy Management Methods and Control Strategies

• 11. Power Factor Correction
• Approximately 1,500 Kvars of automatic power
  factor correction is used to reduce facility peak
  power demand

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Energy Management Methods and Control Strategies

• 12. Variable Frequency Drives
• This equipment is installed in line with specific
  motor loads to control the motor speed. It can
  be very cost effective in the right application
  since it reduces electricity consumption by the
  motor.

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Critical Factors for Energy Use Reduction

• AEM
• 1. Awareness
• How, why and where energy is being used must be
  understood.
• You cannot optimize energy use if it is not clear
  how it is being used.

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Critical Factors for Energy Use Reduction

• 2. Efficiency
• Efficient use of energy reduces the overall cost.
• Only use it when required and use as little as
  possible to accomplish the task.

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Critical Factors for Energy Use Reduction

• 3. Management
• Manage energy, do not let it manage you.
• The phrase It has always run that way is not
  always the right answer.
• Sometimes you will be surprised what you find.

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Critical Factors for Energy Use Reduction

• Options
• Hire an expert to help you achieve AEM.
• Consultants that specialize in energy management
  are available to help you achieve AEM.
• An energy audit can be the first step and will
  identify where and how much energy is being used.
  It is critical to know How, Where and Why energy
  is being used before any reduction can be
  accomplished.