Roehampton University case study
About Roehampton University
Roehampton University is a campus university situated on three major sites at Roehampton in south-west London, in the United Kingdom. The listed buildings stand in grounds close to Richmond Park and Putney, with central London a few miles away. Today the University has a broad range of expertise across the arts and humanities, social sciences and the human and life sciences, at the same time as maintaining its historic strength in education.
How powerPerfector was able to help Roehampton University
After receiving the annual electricity consumption details for the five sites a Roehampton University, it was possible to give a provisional quote for the powerPerfector units and to outline the potential for energy savings. A voltage logger was then sent for a little more than a week, which recorded the voltage level at the site by connecting it to a regular mains socket. It was found that the average voltage at the site was 243 volts (V), 13V higher than the nominal supply in the UK. After a survey of the site by a powerPerfector Approved Contractor, the installation took place on a Monday. Analysis following the installation showed that there was an average reduction in kWh consumption of 9.3% attributable to the powerPerfector installation, equating to annual carbon dioxide emissions saving of 326,741 kg.
Getting the source right
powerPerfector is the world’s only Voltage Power Optimiser, giving energy, carbon and cost savings by efficiently optimising a site’s supply voltage. By optimising the voltage, electrical equipment runs more efficiently and consumes less energy. The declared electricity supply in the United Kingdom is now, as a result of European Harmonisation, 230V with a tolerance of +10% to -10%. This means that effective voltage can be anywhere between 207V and 253V depending on local conditions. Most electrical equipment manufactured for Europe and the UK is rated at 220V and operates more efficiently at this level. Forcing appliances to operate at a higher voltage in the UK (242V is the average supply level) leads to significantly higher energy consumption, increased heat losses and a reduced life span. Optimising voltage with powerPerfector brings your supply voltage to the “higher efficiency” operating range of your equipment. Without this, the ‘raw’ supply voltage to your site is likely to be at the top end of the range of voltages your electrical equipment can tolerate. As well as reducing energy consumption, this reduces the strain on your equipment, extending its lifespan according to many of our clients. It is estimated that 90% of sites in the UK are operating at too high a voltage and could therefore benefit from installing a powerPerfector.
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