Wiki

Version 22 (Niranjini Rajagopal, 10/16/2013 05:45 pm)

1 1 Anthony Rowe
h1. Building Energy Optimization
2 1 Anthony Rowe
3 2 Niranjini Rajagopal
h2. Project Description
4 2 Niranjini Rajagopal
5 2 Niranjini Rajagopal
The Building Energy Optimization System is a sensor network consisting of several power and environmental sensors to monitor and understand energy usage patterns with the objective of giving the user feedback on reducing the energy consumption.
6 2 Niranjini Rajagopal
7 2 Niranjini Rajagopal
h2. System Components
8 2 Niranjini Rajagopal
9 6 Niranjini Rajagopal
!Energy_Sensor_Network4.jpg!
10 3 Niranjini Rajagopal
11 14 Niranjini Rajagopal
The Three-phase energy meter is used to measure the aggregate energy consumption of all appliances. Each plug-through power meter measures the energy of an individual appliance. Every electromagnetic-field based (EMF) energy sensor is placed in the proximity of an appliance, and detects the state change when the appliance turns on or off. The environmental sensors measure the ambient light, temperature, audio, pressure, acceleration and humidity and detect human motion in the proximity. The thermal scanner is mounted on the ceiling and generates a thermal map upon scanning the entire room. The thermal and the environmental sensors data can be correlated with the per-appliance energy consumption and can give useful information on usage patterns, and can also help detect building and appliance faults.
12 2 Niranjini Rajagopal
13 1 Anthony Rowe
Each of the sensors are described briefly below:
14 14 Niranjini Rajagopal
15 16 Niranjini Rajagopal
# *Environmental sensors*
16 10 Niranjini Rajagopal
17 9 Niranjini Rajagopal
The figure below shows the environment sensing board with all its sensors labeled.
18 1 Anthony Rowe
19 1 Anthony Rowe
!ff3-env-sensor.jpg!
20 1 Anthony Rowe
21 1 Anthony Rowe
22 18 Niranjini Rajagopal
23 16 Niranjini Rajagopal
# *Thermal Scanner*
24 14 Niranjini Rajagopal
** Low-Cost Thermal Scanner
25 1 Anthony Rowe
** Distributed Scanning
26 14 Niranjini Rajagopal
** 3D model construction
27 16 Niranjini Rajagopal
28 1 Anthony Rowe
!Thermal-scanner.jpg! !Thermal-scanner-3D.jpg!
29 1 Anthony Rowe
30 14 Niranjini Rajagopal
31 18 Niranjini Rajagopal
32 16 Niranjini Rajagopal
# *Three-phase energy meter*
33 13 Niranjini Rajagopal
** 3-Phase Circuit Panel Meter (110-240VAC)
34 13 Niranjini Rajagopal
** RMS Current, RMS Voltage, True Power, Apparent Power, Reactive Power, Power Factor
35 1 Anthony Rowe
** 2KHz Output Rate
36 13 Niranjini Rajagopal
** 1W resolution with 20KW max load
37 13 Niranjini Rajagopal
** Local processing support asynchronous pushing of power events on change
38 16 Niranjini Rajagopal
39 1 Anthony Rowe
!3phase-meter.jpg! !3phase-bottom.jpg!
40 22 Niranjini Rajagopal
(Details of the current and voltage connections to the meter are present in pdf at the end of this page)
41 1 Anthony Rowe
42 8 Niranjini Rajagopal
43 18 Niranjini Rajagopal
44 16 Niranjini Rajagopal
# *Plug-through energy meter*
45 9 Niranjini Rajagopal
** 1 outlet (110-240VAC)
46 9 Niranjini Rajagopal
** Mechanical relay switching
47 1 Anthony Rowe
** RMS Current, RMS Voltage, True Power, Apparent Power, Reactive Power, Power Factor
48 9 Niranjini Rajagopal
** 2KHz Sampling Rate
49 9 Niranjini Rajagopal
** 1W resolution with 1700W max load
50 1 Anthony Rowe
** Local processing support asynchronous pushing of power events on change
51 1 Anthony Rowe
52 21 Anthony Rowe
!plug-front.jpg! 
53 18 Niranjini Rajagopal
54 14 Niranjini Rajagopal
55 9 Niranjini Rajagopal
56 17 Niranjini Rajagopal
# *Electromagnetic-field (EMF) sensor*
57 17 Niranjini Rajagopal
** Contact-less sensing of current
58 17 Niranjini Rajagopal
** Automatic gain adjustment every 100ms
59 20 Niranjini Rajagopal
** Transmits gain value to indicate strength of measured field
60 19 Niranjini Rajagopal
61 19 Niranjini Rajagopal
!emf-sensor.jpg!