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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

DiMTEC hosts second conference on disaster risk reduction

2009-06-02

Dr Anthony Turton, the Director: TouchStone Resources (Pty) Ltd. delivered the opening address at this year’s two-day annual international conference on disaster risk reduction that was presented by the Disaster Management Training and Education Centre for Africa (DiMTEC) at the University of the Free State (UFS).

In his presentation: Sitting on the horns of a dilemma: South Africa and its strategic water supply, he said: “We have simply reached the limit of the water resources in South Africa. On the one hand, we deal with the quantity dilemma in terms of strategic water storage. South Africa and Zimbabwe counts under the top 20 countries in the world in terms of dams built. We can only build about ten more dams.”

“On the other hand, we must deal with quantity. Previous solutions are not future solutions. When water is recycled, hormones such as oestrogen do not disappear. We must become creative and do something else,” he said.

“Science can make a difference. The UFS is well placed in terms of its groundwater research. Universities must invest in the necessary technology because the testing of toxins is essential. We must work in ways to prevent toxins from re-entering the water cycle,” he said.

A number of international speakers such as Dr Fabrice Renaud, Associate Director at the United Nations University’s Institute for Environment and Human Security (UNU-EHS) in Bonn, Germany, Dr Eugene Poolman, Chief Forecaster: Disaster Risk Reduction, South African Weather Service, and Prof. Rob Bragg from the Department of Microbial, Biochemical and Food Biotechnology at the UFS, attended the conference, as well as attendees from 11 different countries.

At the conference were, from the left: Mr Andries Jordaan, Director: DiMTEC at the UFS; Dr Ing Jörn Birkmann, Head of Section: Vulnerability Assessment at the United Nations University’s Institute for Environment and Human Security (UNU-EHS); Dr Anthony Turton, Director: TouchStone Resources (Pty) Ltd.; and Dr Fabrice Renaud, Associate Director: UNU-EHS.
Photo: Supplied

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