POEM: Power-efficient occupancy-based energy management system

Buildings account for 40% of US primary energy consumption and 72% of electricity. Of this total, 50% of the energy consumed in buildings is used for Heating Ventilation and Air-Conditioning (HVAC) systems. Current HVAC systems only condition based on static schedules; rooms are conditioned regardle...

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Vydáno v:Ipsn 13 Proceedings of the 12th International Conference on Information Processing in Sensor Networks s. 203 - 216
Hlavní autoři: Erickson, Varick L., Achleitner, Stefan, Cerpa, Alberto E.
Médium: Konferenční příspěvek
Jazyk:angličtina
Vydáno: ACM 01.04.2013
Témata:
Buildings
Cameras
Energy savings
Hidden Markov models
HVAC
Occupancy
Sensors
Vectors
Ventilation
Wireless sensor networks
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Abstract Buildings account for 40% of US primary energy consumption and 72% of electricity. Of this total, 50% of the energy consumed in buildings is used for Heating Ventilation and Air-Conditioning (HVAC) systems. Current HVAC systems only condition based on static schedules; rooms are conditioned regardless of occupancy. By conditioning rooms only when necessary, greater efficiency can be achieved. This paper describes POEM, a complete closed-loop system for optimally controlling HVAC systems in buildings based on actual occupancy levels. POEM is comprised of multiple parts. A wireless network of cameras called OPTNet is developed that functions as an optical turnstile to measure area/zone occupancies. Another wireless sensor network of passive infrared (PIR) sensors called BONet functions along-side OPTNet. This sensed occupancy data from both systems are then fused with an occupancy prediction model using a particle filter in order to determine the most accurate current occupancy in each zone in the building. Finally, the information from occupancy prediction models and current occupancy is combined in order to find the optimal conditioning strategy required to reach target temperatures and minimize ventilation requirements. Based on live tests of the system, we estimate ≈ 30.0% energy saving can be achieved while still maintaining thermal comfort.
AbstractList Buildings account for 40% of US primary energy consumption and 72% of electricity. Of this total, 50% of the energy consumed in buildings is used for Heating Ventilation and Air-Conditioning (HVAC) systems. Current HVAC systems only condition based on static schedules; rooms are conditioned regardless of occupancy. By conditioning rooms only when necessary, greater efficiency can be achieved. This paper describes POEM, a complete closed-loop system for optimally controlling HVAC systems in buildings based on actual occupancy levels. POEM is comprised of multiple parts. A wireless network of cameras called OPTNet is developed that functions as an optical turnstile to measure area/zone occupancies. Another wireless sensor network of passive infrared (PIR) sensors called BONet functions along-side OPTNet. This sensed occupancy data from both systems are then fused with an occupancy prediction model using a particle filter in order to determine the most accurate current occupancy in each zone in the building. Finally, the information from occupancy prediction models and current occupancy is combined in order to find the optimal conditioning strategy required to reach target temperatures and minimize ventilation requirements. Based on live tests of the system, we estimate ≈ 30.0% energy saving can be achieved while still maintaining thermal comfort.
Author Erickson, Varick L.
Cerpa, Alberto E.
Achleitner, Stefan
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  givenname: Stefan
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  givenname: Alberto E.
  surname: Cerpa
  fullname: Cerpa, Alberto E.
  email: acerpa@ucmerced.edu
  organization: Elect. Eng. & Comp. Science, Univ. of California, Merced, USA
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Snippet Buildings account for 40% of US primary energy consumption and 72% of electricity. Of this total, 50% of the energy consumed in buildings is used for Heating...
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StartPage 203
SubjectTerms Buildings
Cameras
Energy savings
Hidden Markov models
HVAC
Occupancy
Sensors
Vectors
Ventilation
Wireless sensor networks
Title POEM: Power-efficient occupancy-based energy management system
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