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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

Work clouds and rhizomatic learning – Prof Johannes Cronjé teaches through technology in inaugural lecture

2014-09-29

Prof Johannes Cronjé

Prof Johannes Cronjé has been appointed as visiting professor in the Faculty of Natural and Agricultural Sciences in collaboration with the Centre for Teaching and Learning. The driving force behind his appointment is to develop young and upcoming scholars in the field of online and blended learning at our university.The title of Prof Cronjé’s inaugural lecture, ‘Tablets, Painkillers or Snake Oil – a Remedy for Education?’ suggested a compelling event. Prof Cronjé did not disappoint.

“We live in a world where we carry more information in our pockets than in our entire head,” Prof Cronjé remarked. Interesting fact: an iPhone 4 has 16 million times more processing power than the Apollo 11 – the spacecraft that put the first man on the moon.

If students carry this much processing power in their hands, what should we be teaching students? Prof Cronjé asked. “I believe the answer to that is: we should be teaching them to teach themselves.”

Presenting his inaugural lecture in the same way as he would to his students, Prof Cronjé had the entire audience within minutes vigorously participating in the event.

Prof Cronjé advocates a process called rhizomatic learning. Knowledge, he explained, grows in a similar way to rhizomes’ roots – inseparably connected and seemingly without beginning or end. “Learning is a social aspect: people learn from one another.”

Making use of freely-available online applications, Prof Cronjé demonstrated the power of technology in the classroom. “My objective is to use technology to make people enthusiastic and motivated about the learning process.” Using their smartphones, tablets and laptops, the audience could effortlessly participate through connecting to each other by means of a virtual work cloud. “Knowledge is being created in the room as it happens,” Prof Cronjé explained, “motivating you to participate in this learning experience.”

“There are three things you need for group work to be successful: a mutual goal, individual responsibility and positive interdependence. Then it is real cooperative learning,” Prof Cronjé concluded.

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