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Ethanol-gasoline and butanol-gasoline blended fuel was tested in a conventional engine under various air-fuel equivalence ratios for its performance and emissions. The results of engine performance tests showed that torque output would increase slightly at seventy percent throttle valve opening when ethanol-gasoline and butanol-gasoline blended fuel was used. It was also shown that CO and HC emissions...
This paper aims to highlight the potential and prospects of bio-fuel geysers in South Africa, notably the Shiza Manzi geyser. The geyser is compared to the imbaula and an improved StoveTec bio-fuel stove using the SeTAR Centre heterogeneous stove testing protocol. The geyser gave a high power of 23 kW and an adequate thermal efficiency of 36%, boiling 20 litres of water in an average of 12-minutes...
We argue that while researchers note that co-authorship is an insufficient metric for international research collaboration there is little understanding about what else international co-authorship represents. Rather than focus on co-authorship solely as an output of research, we focus on the interaction between researchers involved in a co-authored paper. We therefore interview a range of researchers...
Comprised of 28 million hectares in 2007, the United States (US) maize agricultural landscape was valued at $52 billion. Any threat to the continued dependability of this crop, now important as both a food and fuel source, becomes an important economic and ecological resource management factor for the global economy. Many genetically modified maize varieties contain toxins that target insects, reducing...
Micro-algae have the potential to produce enough bio-fuels to meet the current US fuel demands. In order to achieve this potential, photo-bioreactors (PBRs) need to be developed that are efficient, scalable, and affordable. Models are an analytical tool that can be used to evaluate various PBRs. In this article, a dynamic model is developed for growing micro-algae in a vertical flat panel photo-bioreactor...
This paper presents modeling and simulation of microturbine (MT) to analyze its load following performance as distributed energy resource (DER) with general as well as critical priority loads. The system comprises of a synchronous generator and a MT coupled to it. Simulations are carried out in islanded and grid-connected mode of the system to observe its behavior when supplying customerpsilas variable...
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