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Motion sensor controlled vending machines

2 bytes removed, 01:06, 11 February 2010
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Introduction
<center>'''The ECM file can be downloaded here: [[File: ECM_Motion_Sensor_Vending_Machine_-Final.xls]]'''</center>
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Vending machines operate 24 hours per day, seven days a week using large amounts of energy throughout those hours of operation. In addition to consuming 2,500 to 4,400 kilowatt-hours (kWh) of energy per year at average electricity costs of about 7.5 8 cents / kWh <ref> EnergyShop (2010), ''Residential Electricity Rates'', http://www.energyshop.com/es/prices/ON/eleON.cfm?ldc_id=348& </ref>, the annual operating costs can range from $200 to $350. <br />
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 the machines to function only 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>
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