A Visualization Tool for Building Energy Management System

Many public offices and companies manage their energy consumption by Building Energy Management System (BEMS). It is not an easy task to determine whether the past energy consumption was really necessary or just wasted. Visualization for energy consumption is useful to understand the situations of energy consumption to determine their necessity. This paper presents a visualization tool for energy consumption with BEMS. The tool firstly divides the daily variation of the energy usage and environmental measurements (e.g. Temperature and humidity) into the meaningful number of patterns. It displays "long-term polyline chart" to represent the frequency of the daily pattern so that users can easily focus on particular dates at particular places. It also displays " one-day polyline chart" to represent the daily variation of the recorded values of the particular dates and places specified by users´ click operations. The paper introduces the examples of visualization to demonstrate the effectiveness of the presented tool, with a real dataset of business office building.