Learning more about energy use
05 December 2016
Schneider Electric is involved in a project at the University of Oxford to install main meters and sub-meters in all of its buildings. There has also been a movement to upgrade analogue meters within the buildings to digital ones, to help future-proof the system
The University of Oxford, one of the oldest and most prestigious universities in the world, is home to 22,000 students and has an infrastructure that stretches over 600,000m2 .
The University has an Environmental Sustainability Policy in place designed to enhance the positive environmental impact of current and future operations. It has made a commitment to reduce its carbon footprint by 33% by 2020. One of the key ways in which it is planning to reach these sustainability targets is by encouraging energy efficient practices and investing in its estate to reduce carbon emissions.
The project involving Schneider Electric extends to new buildings and retrofits in older University properties. Meters are responsible for the collection of all electrical data from the various buildings across the city – including laboratories, libraries and office blocks – and providing accurate time-stamped information about how the systems are working. This data is typically used by the Energy Management and Environmental Sustainability teams for system operation and tracking energy use to make reductions in costs.
The meters and sub-meters are a combination of ION7650, ION7550, ION7550RTUs and ION6200 meters. There are more than 1000 meters in total, of which more than 200 are main meters. These are designed for key distribution points and sensitive loads, and offer advanced power quality analysis coupled with billing accuracy. They improve power reliability across the University’s network by tracking real-time power quality, monitoring equipment status, trending loads, and logging events and alarms.
Once a full and upgraded system was implemented it was much easier for the Energy Management team to ensure that each individual department was being billed correctly for energy use. The upgraded metering system also allowed for the automation of this billing process, which was previously labour intensive.
Bringing all of the data together, the University of Oxford uses Schneider Electric’s Power Monitoring Expert (PME) software to collect and organise meter data. Prior to the implementation of PME, the meters had to be manually read in every building five times a year, taking a total of two days each time – so there have been time savings for the energy management team.
The information gleaned from the PME is used by building and facilities managers across the University to help make savings and increase energy efficiency. It has not only helped the University to reduce energy costs, but also to increase power reliability and availability.
“The upgraded metering and monitoring system, provided by Schneider Electric, has given us more information on the University’s energy use than ever before, allowing us to make more informed decisions and save costs across the board. The University has over 300 buildings, so having all of the important information at our fingertips means we know what’s going on anywhere, at any given time. I consider the system to be my ‘fifth engineer’” said David Baker, electrical engineer in the Estates Services department at the University of Oxford.
The reason for the implementation of this university-wide metering system was to help improve operational efficiency and encourage further energy efficiency. The original metering system was 10 to 15 years old and was initially built on a single building basis. The new system has been implemented to help with sustainable energy management and carbon management. One of its key benefits is disturbance monitoring, so that potential problems can be spotted early and fixed before they cause any issues – especially with some of the more power-critical buildings like the laboratories.
“The success of the metering and monitoring system at the University of Oxford is testament to a long-term and ever improving partnership between Schneider Electric and the University’s Energy Management team. Regular upgrades to the metering network at the University mean that the team there has all the information necessary to be able to draw actionable insights and make decisions to keep reducing energy costs” said Poonam Walid, Category Marketing Manager, EcoBuildings at Schneider Electric.