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Smart LED Lighting for Power Management in a Building Aly A. Syed 1 , Sachin Bhardwaj 2 , Tanir Ozcelebi 2  and Johan Lukk...
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Smart LED Lighting for Power Management in a Building


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Smart LED Lighting for Power Management in a Building

  1. 1. Smart LED Lighting for Power Management in a Building Aly A. Syed 1 , Sachin Bhardwaj 2 , Tanir Ozcelebi 2 and Johan Lukkien 2 1 Distributed System Architectures, NXP Semiconductors / Central R&D / Research, High Tech Campus 32, 5656 AE Eindhoven, The Netherlands   2 Department of Mathematics and Computer Science, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands, {s.bhardwaj, t.ozcelebi, j.j.lukkien}, Introduction Energy is becoming expensive and electricity providers are coming with different schemes for billing. One model is that a building gets a quota of electric power that it is allowed to use. If the building uses more power than its quota, then a significantly higher price for electricity is charged. This way, electric energy providers can plan their power generation in a cost effective manner. A building is assigned a power usage quota. This building has two types of rooms, rooms that have a high priority and rooms that have low priority. The high priority rooms are allowed to use the power according to whatever demand there is at a time, while the low priority rooms are obliged to use the power that is leftover from the quota after the consumption of high priority rooms has been subtracted. The system in this building takes power consumption in the high priority rooms and adjusts the lighting in the low priority rooms such that the quota assigned to the building is maintained. Use Case Scenario Semantic Interoperability <ul><li>Gateway-KP (GWKP) is capable for updating light information to the SIB and is subscribed for the power consumption data from high priority room. </li></ul><ul><li>After getting power consumed value from the high priority room it regulates the light output of LED luminaries in the low priority room using no more than the remaining power quota. </li></ul><ul><li>The GWKP also keeps illumination in the room according to the user preference and activity as much as possible. </li></ul><ul><li>In case, the power provided to the low priority room is not sufficient to give desired illumination then the lights adjust such that the quota for the building is maintained. </li></ul><ul><li>GWKP also updates light information on the SIB. </li></ul>Conclusions Objective The major goal of this system is to demonstrate interoperability between two sub systems namely OSAS (TU/e-SAN) and NXP lighting system which are based on different architectures using SOFIA Smart M3 approach. System Architecture We developed a power-managed smart LED lighting system composed of various types of embedded devices with different computing and communication platforms, forming a heterogeneous network. The power management information is exchanged between different networks and devices using an ontology-based semantic interoperability architecture, namely Smart-M3. The proposed priority mechanism ensures accurate maintenance of the overall power consumption levels, always keeping it under a given power quota for the building. This behavior is regardless of changing external lighting conditions as the smart lighting system introduced is capable of adjusting light output levels from individual luminaries as well as their power consumption in both LoPR and HiPR. High Priority Room (HiPR) LED Luminary Features in LoPR and HiPR Low Priority Room (LiPR) Experimental Results Experimental Devices Reference Sachin Bhardwaj, Aly A. Syed, Tanir Ozcelebi, J.J. Lukkien, &quot;Power-managed smart lighting using a semantic interoperability architecture&quot;, IEEE Transactions on Consumer Electronics , Vol.57, Issue 2, pp. 420-427, May, 2011. <ul><li>Lighting system that adapts to user activity and changes light level </li></ul><ul><li>All lamps individually send their power consumption value to the SIB and periodically update. </li></ul><ul><li>In case, the change in light output is required then the lamps can be adjusted automatically according to the desired illumination. </li></ul><ul><li>The sensors and switches are used to maintain the light level in a room according to the preference of a user. </li></ul><ul><li>As it is a high priority room, the lighting system uses as much power as needed. </li></ul>(a) System Architecture (b) Subscriptions and update links for the system architecture (b) Comparison of required and regulated power in LoPR. (a) Power consumption in HiPR and LoPR based over four tests.. HiPR hardware components are shown in (a) and (b), where (a) is a power measuring light source P-KP and (b) is an S-KP. LoPR hardware components are shown in (c), (d) and (e), where (c) is a sensor node SN (d) is an LED actuator board for AN and (e) is a 36-LED AN luminary. PlowReq: Power required in low priority room Ph: Power used in high priority room Ql: Remaining power quota for low priority room Features LoPR Luminary HiPR Luminary Luminary function turned on and off, and its brightness controlled turned on and off, and its brightness controlled Output update rate 30 updates/second 1 update/second Number of LEDs in one luminary 36 3 Power source DC power source AC 220V Power conversion None LED lighting driver with power measurement Connection USB port ZigBee and Internet Maximum light output from one LED luminary 360 lumens (maximum 10 lumens per LED) 525 (maximum 175 lumens per LED) Maximum power used by one LED luminary 6486 milliwatts 4500 milliwatts