Project
| # | Title | Team Members | TA | Documents | Sponsor |
|---|---|---|---|---|---|
| 39 | ECEB Submetering System [Pitched Project] |
Houji Zhou Sophia Marhoul Vincent Nguyen |
Tianxiang Zheng | design_document1.pdf final_paper1.pdf photo1.HEIC photo2.HEIC presentation1.pptx proposal1.pdf video |
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| Team Members: - Sophia Marhoul (marhoul2) - Houji Zhou (houjiz2) - Vincent Nguyen (vbn3) Our RFA is based on Prof. Schuh’s proposal for a 3-phase, 208V, 60Hz power meters that can be placed inside individual rooms for detailed power monitoring. # Problem The ECEB is a Platinum LEED certified building, powered by rooftop solar panels. In order to continually improve energy efficiency, it is necessary to further optimize power consumption. This can be done if building management has detailed power data, tracked over significant periods of time, to analyze trends in usage and opportunities to reduce idle consumption. # Solution Our solution is to create power meters that can accurately measure power, voltage, and current of individual rooms within ECEB and upload this data to a server for future analysis and monitoring. # Solution Component ## 3-Phase Metering - We will use a hall effect sensor as a current transformer/ current sensor, such that we can calculate the continuous current. The Tamura 400A Hall Effect Open Loop Bidirectional Module (Digikey MT7178-ND) is one example of a suitable sensor. - The system voltage can either be calculated with a contact method, such as a high-resistance voltage divider, or by a non-contact sensor, depending on the project sponsor’s preference. Noncontact methods are significantly more expensive, but will make the device easier to install and move. - Instantaneous power will be calculated by multiplying instantaneous voltage and current from each phase in the microcontroller. ## Power Supply We will use a battery that can supply our meter for a minimum of 1 week without needing to be recharged. ## ESP32 Microcontroller - The ESP32 will be responsible for onboard computing, and streaming our data to a web server with their respective time stamp via WiFi, and transferring data into an SD card that will store at least 96 hours of data. - An SD card will store up to 96 hours of data onboard the PCB. We expect the SD card to be roughly 100 MB assuming that 4 data points (time, power, voltage, and current) must be taken every 0.1 seconds and stored for 96 hours. ## Web Server - The web server stores the data uploaded by the ESP32 and will process any required computing for analysis. - users will be able access a website that displays the data from the webserver and be able to download csv data. # Criterion For Success - The 3-phase meter can measure power, voltage, and current 10 times per second. - For our demonstration, we will show that we can accurately measure the power, voltage, and current of the output of the power bench. - The device will store the data into a SD card on board (up to 96 hours). - The ESP32 will then upload the data to a web server, where it communicates with the web server 4 times a hour through WiFi. - Users will be able to access a website and view the data and be able to download it into csv. The web server will interface with the meter functionally. And it can send requests to the board that pulls the data within a certain time to the web server (up to 96 hours). |
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