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{{425inprogress|May 1, 2010}}
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[[Category:Green IT]]
 
   
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=Motion Sensor Controlled Vending Machines=
 
=Motion Sensor Controlled Vending Machines=
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<center>'''The ECM file can be downloaded here: [[File: ECM_Motion_Sensor_Vending_Machine_-Final.xls]]'''</center>
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<center>'''The ECM file can be downloaded here: [[File: ECM_-_Motion_Sensor_Vending_Machine Feb. 18.xls]]'''</center>
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New, efficient vending machines are available that can greatly reduce operating costs through the use of [http://en.wikipedia.org/wiki/Passive_infrared_sensor infrared motion sensors].  These sensors allow some of the machines functions to only work when a person is present in front of the sensor.  The compressors run only enough to maintain a suitable temperature throughout the workday while the lights and other components remain off in order to minimize overall energy consumption.  <ref> E Source Companies LLC (2009), ''Vending Machine Energy Savings'', http://www.mge.com/business/saving/madison/pa_50.html </ref>
 
New, efficient vending machines are available that can greatly reduce operating costs through the use of [http://en.wikipedia.org/wiki/Passive_infrared_sensor infrared motion sensors].  These sensors allow some of the machines functions to only work when a person is present in front of the sensor.  The compressors run only enough to maintain a suitable temperature throughout the workday while the lights and other components remain off in order to minimize overall energy consumption.  <ref> E Source Companies LLC (2009), ''Vending Machine Energy Savings'', http://www.mge.com/business/saving/madison/pa_50.html </ref>
      
==The Technology==
 
==The Technology==
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Most vending machine sensors use passive infrared (PIR) sensors, which unlike optical sensors that use an LED transmitted and infrared receiver, emits nothing. Rather than radiating, the PIR responds to infrared energy emitted by any nearby objects. Any object with a temperature above zero degrees Celsius emits infrared energy, through black-body radiation. Invisible to the human eye, the magnitude of this radiation varies with temperature, which is exactly what makes the PIR function the way it does. <br />
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Most vending machine sensors use passive infrared (PIR) sensors, which unlike optical sensors that use an LED transmitter and infrared receiver, emit nothing. Rather than radiating, the PIR responds to infrared energy emitted by any nearby objects. Any object with a temperature above zero degrees Celsius emits infrared energy, through black-body radiation. Invisible to the human eye, the magnitude of this radiation varies with temperature, which is exactly what makes the PIR function the way it does. <br />
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==Energy Saving Alternatives==
 
==Energy Saving Alternatives==
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The following is a list of suggests that can further reduce the energy usage and savings of the vending machines:
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The following is a list of suggestions that can further reduce the energy usage and savings of the vending machines:
 
* Remove light bulbs or replace current light bulbs with more energy efficient device (ie. CFL or LED)
 
* Remove light bulbs or replace current light bulbs with more energy efficient device (ie. CFL or LED)
 
* Reduce the operating temperature of the machine if appropriate
 
* Reduce the operating temperature of the machine if appropriate
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* Attempt to use an alternative other than vending machines (ie. Bring your own water)
 
* Attempt to use an alternative other than vending machines (ie. Bring your own water)
 
* Regularly clean coolant coils and ensure machine is properly maintained
 
* Regularly clean coolant coils and ensure machine is properly maintained
      
==Links==
 
==Links==
 
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* [http://www.green.colostate.edu/green-vending.aspx Colorado State University - Green Vending]
 
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* [http://www.usatech.com/energy_management/energy_vm.php Vending Misers]
[http://www.green.colostate.edu/green-vending.aspx Colorado State University - Green Vending]
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==References==
 
==References==
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<references />
 
<references />
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{{Mech425}}
 
[[category: Mech425 ]]
 
[[category: Mech425 ]]
 
[[Category:Mech425 GreenIT Project]]
 
[[Category:Mech425 GreenIT Project]]
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[[Category:Energy audit]]
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