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Browsing by UP Author "Le Roux, Willem Gabriel"
Now showing items 1-20 of 24
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Le Roux, Willem Gabriel; Swanepoel, Pieter J. (Wiley, 2019-01)A new type of engine concept is proposed, namely a rotating disk cylinder engine. Unique secondary rotors with grooves act as guide vanes for a working fluid to power a main rotor with multiple cylindrical pistons. Currently, ...
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Craig, K.J. (Kenneth); Meyer, Josua P.; Le Roux, Willem Gabriel (3rd Southern African Solar Energy Conference, South Africa, 11-13 May, 2015., 2015)Paper presented to the 3rd Southern African Solar Energy Conference, South Africa, 11-13 May, 2015.
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Loni, Reyhaneh; Mahian, Omid; Najafi, Gholamhassan; Sahin, Ahmet Z.; Rajaee, Fatemeh; Kasaeian, Alibakhsh; Mehrpooya, Mehdi; Bellos, Evangelos; Le Roux, Willem Gabriel (Elsevier, 2021-10)Organic Rankine Cycle (ORC) is a promising electricity production technology that exploits low and medium heat sources. Usually, renewable and alternative heat sources can be used in order to feed an ORC with heat. The ...
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Humbert, G.; Roosendaal, Casey; Swanepoel, Jonathan Kyle; Navarro, H.M.; Le Roux, Willem Gabriel; Sciacovelli, A. (Elsevier, 2022-11)Solar air Brayton cycles can provide heat and power to small communities with no access to the national grid. However, the temporal mismatch between the energy supply and demand can limit the amount of solar energy ...
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Le Roux, Willem Gabriel; Bello-Ochende, Tunde; Meyer, Josua P. (Elsevier, 2014-08)The first law and second law efficiencies are determined for a stainless steel closed-tube open rectangular cavity solar receiver. It is to be used in a small-scale solar thermal Brayton cycle using a micro-turbine with ...
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Pavlovic, Sasa; Bellos, Evangelos; Le Roux, Willem Gabriel; Stefanovic, Velimir; Tzivanidis, Christos (Elsevier, 2017-07)Solar-tracking dish collectors are a potential alternative to fossil fuels because of their high concentration ratios. Important considerations for solar collectors are manufacturing costs, complexity, efficiency, uniform ...
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Swanepoel, Jonathan Kyle; Le Roux, Willem Gabriel; Lexmond, A.S. (Axel); Meyer, Josua P. (Elsevier, 2021-02)Concentrated solar systems have a large potential for power generation and water pumping in rural off-grid settlements with a high solar irradiance resource. With the use of a solar dish concentrator, superheated steam can ...
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Swanepoel, Jonathan Kyle; Le Roux, Willem Gabriel; Roosendaal, Casey; Madani, Seyed H.; De Wet, Gideon Jacobus; Nikolaidis, Theoklis; Roosendaal, Westley; Onorati, Chase; Sciacovelli, Adriano; Liu, Yize; Mokobodi, Tlou; McGee, Duncan S.; Craig, K.J. (Kenneth) (Elsevier, 2024-07)The Solar Turbo Combined Heat and Power (ST-CHP) project developed a novel solar-gas hybrid prototype for combined heat and power generation in Pretoria, South Africa. A vacuum-membrane faceted parabolic dish with a ...
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Numerical comparison of a solar dish concentrator with different cavity receivers and working fluids Loni, Reyhaneh; Asli-Ardeh, E. Askari; Ghobadian, B.; Bellos, Evangelos; Le Roux, Willem Gabriel (Elsevier, 2018-10)Solar concentrating technologies can produce heat for applications such as solar heating, solar cooling, industrial processes, desalination and electric power generation. For a solar dish collector, various solar receivers ...
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Le Roux, Willem Gabriel; Bello-Ochende, Tunde; Meyer, Josua P. (Elsevier B.V., 2011-10)The small-scale open and direct solar thermal Brayton cycle with recuperator has several advantages, including low cost, low operation and maintenance costs and it is highly recommended. The main disadvantages of this cycle ...
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Le Roux, Willem Gabriel; Bello-Ochende, Tunde; Meyer, Josua P. (International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, 2014)Paper presented to the 10th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Florida, 14-16 July 2014.
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Bello-Ochende, Tunde; Le Roux, Willem Gabriel; Meyer, Josua P. (International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, 2011)Paper presented at the 8th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Mauritius, 11-13 July, 2011.
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Le Roux, Willem Gabriel; Bello-Ochende, Tunde; Meyer, Josua P. (Elsevier, 2012)The Brayton cycle’s heat source can be obtained from solar energy instead of the combustion of fuel. The irreversibilities of the open and direct solar thermal Brayton cycle with recuperator are mainly due to heat transfer ...
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Le Roux, Willem Gabriel (Elsevier, 2016-10)The solar resource in South Africa is among the best in the world. South Africa has seen an increase in local and international investment in solar power. The optimum angles at which a solar collector should be fixed are ...
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Van der Merwe, Andries Hendrik; Le Roux, Willem Gabriel; Humphries, E.D. (Elsevier, 2023-11)For countries with insufficient power supply and failing power grid infrastructure, it is usually also expensive to import microturbines. Local manufacturing or local assembling in these countries is therefore an attractive ...
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Roosendaal, Casey; Swanepoel, Jonathan Kyle; Le Roux, Willem Gabriel (Elsevier, 2020-08)One of the most important issues faced today with regards to solar concentrators is the trade-off between cost and optical accuracy. In this paper, a new design aims to reduce costs while maintaining high optical accuracy ...
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Loni, Reyhaneh; Najafi, Gholamhassan; Asli-Ardeh, Ezzatollah Askari; Ghobadian, Barat; Le Roux, Willem Gabriel; Yusaf, Talal (MDPI Publishing, 2019-07-28)A parabolic solar dish concentrator, as the heat source of an organic Rankine cycle (ORC), can be used for power generation. Different types of tubular cavity receivers with different nanofluids can be considered for use ...
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Swanepoel, Jonathan Kyle; Roosendaal, Casey; Le Roux, Willem Gabriel (American Institute of Physics, 2022-05)The design of a solar dish usually involves the complex trade-off between cost and optical quality. The use of off-the-shelf elliptical television antennas in a vacuum-membrane solar dish array is investigated in this ...
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Dellar, Kyle Eric; Le Roux, Willem Gabriel; Meyer, Josua P. (Elsevier, 2020-08)A large, efficient recuperator is required for high cycle efficiency in a solar Brayton cycle (STBC) with an open-cavity solar receiver and air as working fluid. A recuperator often requires complex and costly manufacturing ...
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Le Roux, Willem Gabriel; Sciacovelli, Adriano (Elsevier, 2019-12)A recuperated solar-dish Brayton cycle with an off-the-shelf turbocharger as micro-turbine is investigated for potential low-cost power generation. Integrated phase-change thermal storage in the solar receiver can be used ...
Now showing items 1-20 of 24