Joule
Joule is a collection of scripts and a HTML Web App to record and visualise the energy use of a collection of sensors, currently the sensors within the William Gates Building at The University of Cambridge. It provides a tool to explore a tree of sensors, drill down to interesting areas based on geography or energy use such as lighting or server power, and plot charts over a range of time periods, helping to identify both short and long term patterns.
The web app can be found on the Computer Laboratory Meters page.
Web App
To present the data captured by the metering hardware installed into the Computer Lab, we created an app to visualise the energy data of the building. The app presents a hierarchical view of the sensors in the building in both a functional and geographic tree, and allows the user to plot data from individual or groups of sensors, for example; to compare the lighting between corridors, or to find the biggest use of energy by room.
Data Collection
To capture electricity use within the computer lab, we have installed high accuracy electricty monitors on main circuits within the building, and use USB Current clamps to monitor additional sub circuits. This information is logged and stored, for use with the web application.
