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Weathering the winter with energy efficiency

06 June 2019 | Story Valentino Ndaba | Photo Rian Horn

Solar Panels at UFS Qwaqwa Campus — Revolutionising electricity with sun power: Solar panels at the Qwaqwa Campus.

Over the past few years the University of the Free State (UFS) has been planting panels, now the time has come to reap. Solar farms produced a return on investment in the form of R1.4 million in savings as a result of photovoltaics (PV) between January and March 2019. Nicolaas Esterhuysen, an electrical engineer at the Department of University Estates also reported a 2.34% decline in electricity usage between 2013 and 2018.

Solar panels are the future

According to Esterhuysen, the solution to a power crisis lies in “either becoming more energy efficient or generating our own at a cheaper cost”. All campuses have managed to save a total of R5.4 million in 2018 through producing our own power (solar PV) and actively managing the instantaneous load demand with building management system (BMS) software.

Overall, ground-mounted PV installations at all campuses contribute 2609 kilowattpeak (kWp) under standard conditions. The Bloemfontein Campus accounts for 979kWp of that amount while the South Campus generates 762kWp, with the Qwaqwa Campus producing 748kWp, and the Paradys experimental farm bringing in 120kWp to the grand total (to be commissioned June 2019).

Rooftop PVs generate electricity through the 80kWp Muller Potgieter Building, the 255kWp Bloemfontein Campus computer lab, the 35kWp Qwaqwa Campus computer lab, 135kWp Qwaqwa Campus Mandela Hall, and 416kWp Thakaneng Bridge panels. This is a total of 921kWp.

Winter is coming with tariff terrors

A 15.63% electricity tariff increase is projected this year in light of the annual winter adjustments commissioned by Eskom and Centlec. To gear up for the associated spike in power use over this season, University Estates advises the Kovsie community to use energy efficiently. “Think twice before switching on the heating and make sure to switch it off when you leave the office,” advises Esterhuysen.

In addition to generating electricity, saving initiatives such as implementing light-emitting diode (LED) lighting with motion sensors and actively managing demand at peak times have been implemented.

What’s next?

The next step is to rethink dated mechanical installations that are used to heat some of our older buildings. Replacing similar installations across all of the campuses are some of the ways the university intends to escalate energy efficient in future.

News Archive

National 3MT competition held at UFS

2017-03-29

The two winners of the Three minute thesis
competition, Andrew Verrijdt (left) and
Kerryn Warren (right).
Photo: Charl Devenish

From Neanderthal hybrid children to eating corn silk as a way of managing kidney diseases, the National Three Minute Thesis competition (3MT) captivated the mind.

“We brought the competition to South Africa and hosted the local, regional, and national competitions for the past few years,” said Dr Emmie Smit, organiser of the event. It is an opportunity to raise the profile of postgraduate research and to develop a cross-disciplinary student community to effectively communicate research to a wide audience. The event was founded by the University of Queensland, Australia. The third national 3MT competition took place at the University of the Free State (UFS) on Friday 24 March 2017.

Three minutes and one slide
During the competition, participants had three minutes to explain their master’s or doctoral research and one static PowerPoint slide could be used. “It is very important that this slide works for you. There must be some way the information on the slide connects to what you present,” said Dr Henriette van den Berg, Director of the Postgraduate School at the UFS.

Winners grateful for opportunity
“It is an honour and a drive. It is very nice to have this sort of thumbs up,” said Kerryn Warren, winner of the Science category. Her research title was, What did a Human-Neanderthal Child Look Like? “I have been looking at the hybrids between different species and subspecies of mice in order to use them as a model to find out what human hybrids looked like.”

The presentation by Andrew Verrijdt, winner of the Humanities category, entitled Hiding in the Deep: Anonymous Websites for Paedophiles on the ‘Darknet’, gave a glimpse into the mysterious and dangerous realm of the dark web. “I am grateful for the opportunity. Primarily because I think it’s an important topic, and society will benefit by getting the word out there as it is a sensitive topic,” he said. The two winners, both from the University of the Cape Town, won R15 000 each. A further R30 000 of prize money went to the four runners-up.

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