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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

Chemistry postgraduates tackle crystallography with eminent international researcher

2017-04-04

Department of Chemistry senior lecturer, Dr Alice Brink(left),
hosted outstanding researcher, Prof Elspeth Garman (right)
from the University of Oxford in England to present a
crystallography lecture.
Photo: Rulanzen Martin

“Crystallography forms part of everyday life.” This is according to Prof Elspeth Garman, eminent researcher from the Department of Biochemistry, University of Oxford in England, who was hosted by Dr Alice Brink, Department of Chemistry at the University of the Free State (UFS) Bloemfontein Campus. Prof Garman presented a lecture in the Department of Chemistry, titled ‘104 years of crystallography: What has it taught us and where will it lead’. She also taught the postgraduate students how to refine and mount protein structures in cold cryo conditions at about -173°C.

What is Crystallography?
Crystallography is the scientific technique which allows for the position of atoms to be determined in any matter which is crystalline.

“You cannot complete Protein Crystallography without the five key steps, namely obtaining a pure protein, growing the crystal, collecting the data, and finally determining the structure and atomic coordinates,” said Prof Garman. Apart from teaching, she was also here to mentor and have discussions with UFS Prestige Scholars on how to face academic challenges in the professional environment.

Discovery of the first crystal structure of a TB protein
Prof Garman successfully determined the first crystal structure of a Tuberculosis protein (TBNAT), a project that took about 15 years of research. In partnership with the Department of Pharmacology at Oxford University and an outstanding PhD student, Areej Abuhammad, they managed to grow only one TBNAT crystal, one-fiftieth of a millimetre. They also managed to solve the structure and publish it.

Dr Alice Brink, Senior Lecturer in the Department of Chemistry, says, “It’s an incredible privilege to have Prof Garman here and to have her share her wisdom and knowledge so freely with the young academics.”

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