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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

UFS Department of Computer Science and Informatics motivates programming success among learners

2015-04-23

From Sentraal High School are from the left: Albert Dreyer (full marks, Grade 9); Corlé van der Walt (full marks, Grade 10); Janco Venter (full marks, Grade 10); Soné du Pisanie (full marks, Grade 10) en Handré Venter (Grade 9).

A group of learners from the Free State, who are taught at and by the University of the Free State’s Department of Computer Science and Informatics (under the Python project), came first in the Talent Search round of the South African Computer Olympiad (SACO).

According to Dr Anelize van Biljon, senior lecturer in the Department of Computer Science and Informatics, the Olympiad is presented in three main rounds: the Talent Search, the Application Olympiad, and the Programming Olympiad.

At the UFS’s Department of Computer Science and Informatics’ Python project, pupils from various schools in Bloemfontein attend programming classes where they are taught by staff and students of the department. These students are benefitted by the opportunity to transfer their knowledge to others. All the classes are free of charge.

Anelize explains: “The name was chosen because we use the Python programming language. It is a language with considerable appeal – not one of the fastest – which can be learnt relatively quickly, and which conforms to SACO requirements. The purpose of this programming is to implement algorithms (the learner is given a problem, makes a plan to solve it, and does the necessary programming). Thus, it is not about the looks of the programme, but about its effectiveness and speed.”
Anelize is the initialiser and co-ordinator of the Python project. "I started this project in 2010 in the Department of Computer Science and Informatics for learners from Grades 6 to 12 to encourage them to take the subject. These classes exposed them to something more than school work. I enjoy this kind of competitions and am also very involved with Maths Olympiads.

Achievements such as these are good advertisements for the Department of Computer Science and Informatics,” she said.

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