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21 September 2022 | Story Leonie Bolleurs | Photo Johané Odendaal and Edward Lee
UFS Solar car
Team UFS entered the Sasol Solar Challenge for the very first time this year, competing with seven other teams and showcasing their technological input and innovation.

Excitement. Nervousness. A thousand thoughts going through our minds, but primarily “Are we really ready for the challenges that lie ahead?” and “What did we get ourselves into?” In the moments leading up to this year’s Sasol Solar Challenge, these were the thoughts and emotions of Team UFS, who entered their solar car, Lengau.

“But I had confidence in the team,” says Dr Hendrik van Heerden from the UFS Department of Physics at the University of the Free State (UFS) and project manager of Team UFS who entered the challenge for the very first time this year.

Testing perseverance

Entering the Sasol Solar Challenge – a biennial competition that has been running since 2008 – Team UFS competed against seven other teams (representing local and international universities, high schools, and engineering teams), sharing the public roads of South Africa with trucks and regular traffic, sometimes experiencing steep mountain climbs, testing not only their technological input and innovation, but also their perseverance over an eight-day period. 

“One of our main challenges was the long time on the road, to which the heavy weight of the solar car, efficiency of the solar panels, and the effective charging of the battery contributed,” says Dr Van Heerden, stating that these problems were difficult to tackle with the small budget they had. “We, however, stayed positive and was determined to pull through.” 

“We were also open for learning from the other teams, the scrutineers, and observers regarding the mechanical, electrical, and body of competing solar cars. Thus, building knowledge and collaborating is a success we celebrate,” he adds.

In the end it paid off, as Team UFS completed the race, covering a distance of more than 500 km and ending in seventh place overall. The team that finished with the greatest distance covered within the allotted time won the challenge, in this instance the Brunel Solar Team, covering 4 228,2 km.

Dr Van Heerden believes that they did exceptionally well for a debut team, proving themselves against the best. “I am of the opinion that this challenge made us stronger and gave each of us a new perspective on how we should approach life,” he adds.

“As we are all enthusiastic about science and engineering, this challenge inspired us to build towards a future where renewable energy could be an important source of energy in South Africa.”
For a debut team, we did exceptionally well, proving ourselves against the best. – Dr Hendrik van Heerden.

Learning the ropes

The teams left Carnival City in Johannesburg on 9 September 2022 and arrived at the finish line at the V&A Waterfront in Cape Town on Friday 16 September 2022.

Talking about the next race, Dr Van Heerden says he wants to build a better, more effective solar car. “We strive to continuously improve the design, technology, and science going into our car,” he says. 

“For this challenge, we were interested in learning about the mechanical, electrical, and overall body of a solar car. Hence, our solar vehicle was designed well enough to participate and reliable enough to succeed.”

According to him, their focus will shift to competing against the other teams for the next Sasol Solar Challenge. “We will also be more prepared, since we now know what to expect from the challenge. It was our first time participating in the Sasol Solar Challenge, and we’ve learnt so much from the past two weeks – we will carry that forward to the next challenge.

 

News Archive

Carbon dioxide makes for more aromatic decaffeinated coffee
2017-10-27


 Description: Carbon dioxide makes for more aromatic decaffeinated coffee 1b Tags: Carbon dioxide makes for more aromatic decaffeinated coffee 1b 

The Inorganic Group in the Department of Chemistry
at the UFS is systematically researching the utilisation
of carbon dioxide. From the left, are, Dr Ebrahiem Botha,
Postdoctoral Fellow; Mahlomolo Khasemene, MSc student;
Prof André Roodt; Dr Marietjie Schutte-Smith, Senior Lecturer;
and Mokete Motente, MSc student.
Photo: Charl Devenish

Several industries in South Africa are currently producing hundreds of thousands of tons of carbon dioxide a year, which are released directly into the air. A typical family sedan doing around 10 000 km per year, is annually releasing more than one ton of carbon dioxide into the atmosphere.

The Inorganic Chemistry Research Group in the Department of Chemistry at the University of the Free State (UFS), in collaboration with the University of Zurich in Switzerland, has focused in recent years on using carbon dioxide – which is regarded as a harmful and global warming gas – in a meaningful way. 

According to Prof André Roodt, Head of Inorganic Chemistry at the UFS, the Department of Chemistry has for the past five decades been researching natural products that could be extracted from plants. These products are manufactured by plants through photosynthesis, in other words the utilisation of sunlight and carbon dioxide, nitrogen, and other nutrients from the soil.

Caffeine and chlorophyll 
“The Inorganic group is systematically researching the utilisation of carbon dioxide. Carbon dioxide is absorbed by plants through chlorophyll and used to make interesting and valuable compounds and sugars, which in turn could be used for the production of important new medicines,” says Prof Roodt.

Caffeine, a major energy enhancer, is also manufactured through photosynthesis in plants. It is commonly found in tea and coffee, but also (artificially added) in energy drinks. Because caffeine is a stimulant of the central nervous system and reduces fatigue and drowsiness, some people prefer decaffeinated coffee when enjoying this hot drink late at night. 

Removing caffeine from coffee could be expensive and time-consuming, but also environmentally unfriendly, because it involves the use of harmful and flammable liquids. Some of the Inorganic Group’s research focus areas include the use of carbon dioxide for the extraction of compounds, such as caffeine from plants. 

“Therefore, the research could lead to the availability of more decaffeinated coffee products. Although decaffeinated coffee is currently aromatic, we want to investigate further to ensure better quality flavours,” says Prof Roodt.

Another research aspect the team is focusing on is the use of carbon dioxide to extract chlorophyll from plants which have medicinal properties themselves. Chemical suppliers sell chlorophyll at R3 000 a gram. “In the process of investigating chlorophyll, our group discovered simpler techniques to comfortably extract larger quantities from green vegetables and other plants,” says Prof Roodt.

Medicines
In addition, the Inorganic Research Group is also looking to use carbon dioxide as a building block for more valuable compounds. Some of these compounds will be used in the Inorganic Group’s research focus on radiopharmaceutical products for the identification and possibly even the treatment of diseases such as certain cancers, tuberculosis, and malaria.

 

 

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