Journal Articles

2024

• Boshoff, F.D.; Van der Spuy, S.J.; Pretorius, J.P.; Meyer, C.J. (2024). “Investigation into the predicted performance of a cooling fan for an sCO2 CSP plant“. IMechE Journal of Power and Energy, Vol. 10, No. 2, pp. 1-11.
• Du Sart, C.F; Rousseau, P.; Laubscher, R. (2024). “Comparing the partial cooling and recompression cycles for a 50 MWe sCO2 CSP plant using detailed recuperator models“. Renewable Energy, Volume 222, February 2024, 119980.
• Hassan, E.B.E.; Hoffmann, J. (2024). “Review on pressure drop through a randomly packed bed of crushed rocks“. Discover Applied Sciences, Vol.6:126.
• Laubscher, R.; Rousseau, P.; van der Spuy, J.; Du Sart, C.; Pretorius, J.P. (2024). “Development of a 1D network-based momentum equation incorporating pseudo advection terms for real gas sCO2 centrifugal compressors which addresses the influence of the polytropic path shape“. Thermal Science and Engineering Progress, Vol. 55, October 2024, 102921.
• Pretorius, J.P.; Van der Spuy, S.J. (Jr). (2024). “Enhancing axial flow fan performance in air-cooled condensers: tip vortex manipulators and comparative analysis of numerical simulation and experimental testing.” ASME Journal of Fluids Engineering, 146(9), 091203.
• Redelinghuys, L.G.; McGregor, C. (2024). “Influence of solar field size on the multi-objective techno-economic optimisation of a Carnot battery application in a parabolic trough concentrating solar power plant“. Sustainable Energy Technologies and Assessments, Vol. 71, November 2024,103984.
• Redelinghuys, L.G.; McGregor, C. (2024). “Multi-objective techno-economic optimisation of a Carnot battery application in a parabolic trough concentrating solar power plant“. Applied Energy, Vol. 376, Part B, 15 December 2024, 123873.
• Strydom, W.; Pretorius, J.P.; Hoffmann, J.E. (2024). “Natural draft direct dry cooling system performance at various application scales under windless and windy conditions.” Applied Thermal Engineering, Vol. 248, Part A, 123181.
• Venter, A.; Owen, M.; Muiyser, J. (2024). “Benchmarking the Performance of the Actuator-Disk Method for Low-Pressure Axial Flow Fan Simulation“. ASME Journal of Fluids Engineering, 1-44, FE-24-1114.
• Venter, A. J.; Owen, M.T.F.; Muiyser, J. (2024). “The Effects of Rotation and Solidity on the Aerodynamic Behavior of Low-Pressure Axial Flow Fans“. ASME Journal of Fluids Engineering, Volume 146 (5), 051205.

2023

• Clark, S.R.; McGregor, C. (2023). “The effect of HelioPod™ mobility on concentrated solar thermal project economics“. Solar Compass, Vol. 8, 100060.
• Redelinghuys, L.G.; McGregor, C. (2023). “Carnot battery application in a parabolic trough concentrating solar power plant: System modelling, validation and analyses on the interplay between stored energies“. Journal of Energy Storage, Vol. 60, 106545.
• Redelinghuys, L.G.; Tshamala, M.C.; Hans, T.M. (2023). “Performance of an adiabatic pre-cooling system for concentrating solar power plants in arid areas“. Applied Thermal Engineering, Volume 231, 120819.
• Rozon, F.; McGregor, C.; Owen, M. (2023). “Long-Term Forecasting Framework for Renewable Energy Technologies’ Installed Capacity and Costs for 2050“. Energies, Vol. 16 (19), 6874.
• Rozon, F.; Koke, J.; McGregor, C.; Owen, M. (2023). “Techno-economic analyses of solar thermal process heat integration at South African beverage producers“. Solar Compass, Volume 8, 100063.
• Swanepoel, P.C.; Biedermann, T.M.; Van der Spuy, S.J. (2023). “Experimental noise reduction (aeroacoustical enhancement) of a large diameter axial flow cooling fan through a reduction in blade tip clearance“. International Journal of Aeroacoustics 2023, Vol. 0(0), 1-28.

2022

• Bekker, G.M.; Meyer C.J.; Van der Spuy, S.J. (2022). “Influence of pressure recovery on the performance of an induced draught air-cooled condenser under windless and windy conditions“. Applied Thermal Engineering, Vol. 213, 118703.
• Bekker, G.M.; Meyer C.J.; Van der Spuy, S.J. (2022). “Pressure recovery discharge configurations for an induced draught axial flow fan“. R & D Journal, Vol. 38, pp. 1-9.
• Bekker, G.M.; Meyer, C.J.; Van der Spuy, S.J. (2022). “The effect of wind screens on the performance of an induced draft air-cooled condenser under windless and windy conditions“. ASME Journal of Thermal Science and Engineering Applications, Vol. 15, No. 1, 011003.
• Clark, S.; McGregor, C.; van Niekerk, J.L. (2022). “Using liquefied petroleum gas to reduce the operating cost of the Ankerlig peaking power plant in South Africa“. Journal of Energy in Southern Africa, Vol. 33 (2), pp. 15-23.
• Du Plessis, J.; Owen, M. (2022). “Techno-economic analysis of hybrid ACC performance under different meteorological conditions“. Energy, Vol. 255, 124494.
• Erasmus, D.J.; Lubkoll, M.; Craig, K.J.; von Backström, T.W. (2022). “Impingement Heat Transfer With Pressure Recovery“. Springer Heat and Mass Transfer Journal.
• Hoffmann, J.; Manatsa, T.; Houtappels, J. (2022). “Flow Resistance of Randomly Packed Beds of Crushed Rock and Ellipsoidal Particles using CFD“. Journal of Fluid Flow, Heat and Mass Transfer (JFFHMT), Vol. 9, pp.10-22.
• Marincowitz, F.S.; Owen, M.T.F.; Muiyser, J. (2022). “Multi-objective optimisation for wind resistant air-cooled condenser operation“. Applied Thermal Engineering, Volume 218, 5.
• Marincowitz, F.; Owen, M.; Muiyser, J.; Holkers, P. (2022). “Uniformity Index as a Universal Air-Cooled Condenser Fan Performance Metric“. International Journal of Turbomachinery Propulsion and Power, Vol. 7 (4).
• Pretorius, J.P.; Erasmus, J.A. (2022). “Effect of Tip Vortex Reduction on Air-Cooled Condenser Axial Flow Fan Performance: An Experimental Investigation“. ASME Journal of Turbomachinery, Volume 144, No 3: 031001.

2021

• Bekker, G.M.; Meyer, C.J.; Van der Spuy, S.J. (2021). “Performance Enhancement of an Induced Draught Axial Flow Fan Through Pressure Recovery“. R & D Journal, Vol. 37, pp. 35-44.
• Du Plessis, C.; Van der Spuy, S.J.; Reuter, H.C.R. (2021). “On the effect of the correction of modelled airfoil tonal noise for a spanwise extension“. Journal of Aerospace Science and Technology, Vol. 118, Nov 2021, 107033.
• Du Plessis, J.; Owen, M. (2021). “A single-stage hybrid (dry/wet) dephlegmator for application in air-cooled steam condensers: Performance analysis and implications“. Thermal Science and Engineering Progress, Vol. 26, 101108.
• Marincowitz, F.S.; Owen, M.; Muiyser, J. (2021). “The Effect of Windscreens and Walkways On Air-cooled Condenser Performance and Fan Blade Dynamic Loading“. ASME Journal of Engineering for Gas Turbines and Power, October 2021; 143(10): 101019.
• Meas, M.R.; Bruwer, J.F.; Combrinck, M.L.; Harms, T.M. (2021). “Simulating turbulent air flow past a hemispherical body“. R&D Journal, Vol.37, pp.89-95.
• Meyer, T.O.; van der Spuy, S.J.; Meyer, C.J.; Corsini, A. (2021). “Design of a Tip Appendage for the Control of Tip Leakage Vortices in Axial Flow Fans“. ASME Journal of Turbomachinery, Vol. 143 (7), July 2021.
• Rohani, S.; Went, J.; Duvenhage, D.F.; Gerards, R.; Wittwer, C.; Fluri, T. (2021). “Optimization of water management plans for CSP plants through simulation of water consumption and cost of treatment based on operational data“. Solar Energy, Vol. 223, pp. 278-292.

2020

• Bekker, G.M.; Meyer, C.J.; Van der Spuy, S.J. (2020). “Numerical Investigation of Pressure Recovery for an Induced Draught Fan Arrangement“. R & D Journal, Vol. 36, pp. 19-28.
• De la Bat, B.J.G.; Dobson, R.T.; Harms, T.M.; Bell, A.J. (2020). “Simulation, manufacture and experimental validation of a novel single-acting free piston Stirling engine electric generator“. Applied Energy, Vol. 263, 114585.
• De la Bat, B.JG.; Harms, T.M.; Dobson, R.T.; Bell, A.J. (2020). “Derivation and numerical case study of a one-dimensional, compressible-flow model of a novel free-piston Stirling engine“. Energy, Vol. 199, 117404
• Du Plessis, J.; Owen, M. (2020). “An experimental investigation of pressure drop during partial condensation of low pressure steam“. ASME Journal of Thermal Science and Engineering Applications, Vol.12 (5).
• Du Plessis, J.; Owen, M. (2020). “A validated discretized thermal model for application in bare tube evaporative coolers and condensers“. Applied Thermal Engineering, Vol. 175, 115407.
• Duvenhage, D.F.; Brent, A.C.; Stafford, W.H.L.; Van Den Heever, D. (2020). “Optimising the Concentrating Solar Power Potential in South Africa through an Improved GIS Analysis“. Energies, Vol. 13 (12), 3258.
• Duvenhage, D.F.; Brent, A.C.; Stafford, W.H.L.; Grobbelaar, S. (2020). “Water and CSP—Linking CSP Water Demand Models and National Hydrology Data to Sustainably Manage CSP Development and Water Resources in Arid Regions“. Sustainability, Vol. 12 (8),3373.
• Erasmus, D.J.; Lubkoll, M.; von Backtröm, T.W. (2020). “Jet impingement heat transfer within a hemisphere“. Heat and Mass Transfer, Vol. 56(12).
• Lubbe, F.; Maritz, J.; Harms, T. (2020). “Evaluating the Potential of Gaussian Process Regression for Solar Radiation Forecasting: A Case Study“. Energies 2020, Vol. 13(20), 5509.
• Lubkoll, M.; Erasmus, D.J.; Harms, T.M.; von Backström; Kröger, D.G. (2020). “Performance characteristics of the Spiky Central Receiver Air Pre-heater (SCRAP)“. Solar Energy, Vol. 201, pp. 773-786.
• Smit, W.J. (2020). “Improvement of heliostat pointing accuracy by calibration at optimized dissimilar source vectors“. Solar Energy, Vol. 204, pp.238-245.

2019

• Du Plessis, J.; Owen, M. (2019). “An experimental investigation of the air-side pressure drop through a bare tube bundle“. Journal of Thermal Science and Engineering Applications Vol. 12 (1).
• Duvenhage, D.F.; Brent A.C.; Stafford, W.H.L. (2019). “The need to strategically manage CSP fleet development and water resources: A structured review and way forward“. Renewable Energy, Vol. 132, pp.813-825.
• Engelbrecht, R.A.; Meyer, C.J.; van der Spuy, S.J. (2019). “Modeling Strategy for the Analysis of Forced Draft Air-Cooled Condensers using Rotational Fan Models“. ASME Journal of Thermal Science and Engineering Applications, Vol 11 (5).
• Hoffmann, J.E. (2019). “On the Near Term Carbon Free Hydrogen Export Potential of South Africa“. International Journal of Renewable Energy Research, Vol. 9 (3), pp. 1345 – 1351.
• Hoffmann, J.E. (2019). “On the Outlook for Solar Thermal Hydrogen Production in South Africa“. International Journal of Hydrogen Energy, Vol. 44 (2), pp. 629 – 640.
• Marincowitz, F.S.; Owen, M.T.F.; Muiyser, J. (2019). “Experimental investigation of the effect of perimeter windscreens on air-cooled condenser fan performance“. Applied Thermal Engineering, Vol. 163.
• Ssebabi, B.; Dinter, F.; van der Spuy, J.; Schatz, M.(2019). “Predicting the performance of a micro gas turbine under solar-hybrid Operation“. Energy, Vol. 177, pp.121-135.
• Wilkinson, M.B.; van der Spuy, S.J.; von Backström, T.W. (2019). “Performance Testing of an Axial Flow Fan Designed for Air- Cooled Heat Exchanger Applications“. ASME Journal of Engineering for Gas Turbines and Power, Vol. 141 (5).

2018

• Hoffmann, J.E.; Dall, E.P. (2018). “Integrating desalination with concentrating solar thermal power: A Namibian case study“. Renewable Energy, Vol. 115, pp.423-432.
• Pitot de la Beaujardiere, J.; von Backström, T.W.; Reuter, H.C.R. (2018). “Applicability of the local thermal equilibrium assumption in the performance modelling of CSP plant rock red thermal energy storage systems“. Journal of Energy Storage, Vol. 15, pp. 39-56.
• Prinsloo, G.; Dobson, R.T.; Mammoli, A. (2018). “Synthesis of an intelligent rural village microgrid control strategy based on smartgrid multi-agent modelling and transactive energy management principles“. Energy, Vol. 147, pp.263-278.
• Prinsloo, G.J.; Dobson, R.T.; Mammoli, A. (2018). “Smart village load planning simulations in support of digital energy management for off-grid rural community microgrids“. Current Alternative Energy, Vol.2, pp. 2-18.

2017

• Craig, O.O.; Brent, A.C.; Dinter, F. (2017). “Concentrated Solar Power (CSP) Innovation Analysis in South Africa“. South African Journal of Industrial Engineering, Vol. 28 (2).
• Craig, O.O.; Brent, A.C.; Dinter, F. (2017). “The Current and Future Energy Economics of Concentrating Solar Power (CSP) in South Africa“. South African Journal of Industrial Engineering, Vol. 28 (3), pp. 1-14.
• Craig, O.O.; Dobson, R.T.; van Niekerk, J.L. (2017). “A novel indirect parabolic solar cooker“. Journal of Electrical Engineering, Vol. 5, pp. 137-142.
• Gauché, P.; Rudman, J.; Mabaso, M.; Landman, W.A. ; von Backström, T.W.; Brent, A.C. (2017). “System value and progress of CSP”. Solar Energy, Vol. 152, pp. 106-139.
• Heller, L.; Allen, K.G.; Lubkoll, M.; Pitot de la Beaujardiere, J.P.; Gauché, P.; Hoffmann, J.E. (2017). “The SUNDISC cycle: A direct storage-charging dual-pressure air receiver cycle“. Solar Energy, Vol. 153, pp. 435-444.
• Hoffmann, J.E.; van der Merwe, P.C. (2017). “Testing and analysis of low pressure, transparent tube solar receiver for the sunspot cycle“. Journal of Thermal Engineering, Vol. 3 (3), pp. 1294-1307.
• Jadhav, A.S. ; van Niekerk, J.L.; Chembe, D.K.; Strauss, J.M. (2017). “Status of solar technology implementation in the Southern African developing community (SADC) region“. Renewable and Sustainable Energy Reviews, Vol. 73, pp. 622-631.
• Owen, M.T.F.; Kröger, D.G. (2017). “A numerical investigation of vapor flow in large air-cooled condensers“. Applied Thermal Engineering, Vol. 127, pp.157-164.
• Owen, M.T.F.; Kröger, D.G.; Reuter, H.C.R. (2017). “Enhancing turbine output at dry-cooled power plants using a hybrid (dry/wet) dephlegmator“. Heat Transfer Engineering, Vol. 38, pp. 1089-1100.
• Pan, C.A.; Dinter, F. (2017). “Combination of PV and central receiver CSP plants for base load power generation in South Africa“. Solar Energy, Vol. 146, pp.379-388.
• Pitot de la Beaujardiere, J.P.; Reuter, H.C.R. (2017). “A review of performance modelling studies associated with open volumetric receiver CSP plant technology“. Renewable and Sustainable Energy Reviews, Vol. 82 (3), pp.3848-3862.
• Prinsloo, G.J.; Mammoli, A.; Dobson, R.T. (2017). “Customer domain supply and load coordination: A case for smart villages and transactive control in rural off-grid microgrids“. Energy, Vol. 135, pp. 430-441.
• Rohani, S.; Fluri, T.P.; Dinter, F.; Nitz, P.(2017). “Modelling and simulation of parabolic trough plants based on real operating data“. Solar Energy, Vol. 158, pp. 845-860.
• Rudman, J.; Gauché, P.; Esler, K.J. (2017). “Direct environmental impacts of solar power in two arid biomes: An initial investigation“. South African Journal of Science, Vol. 113 (11/12), pp.93-105.

2016

• Allen, K.G.; Heller, L.; von Backström, T.W. (2016). “Cost optimum parameters for rock bed thermal storage at 550-600 °C: A parametric study“. Journal of Solar Energy Engineering, Vol. 138 (6).
• Busse, K.T.; Dinter, F. (2016). “Overview of predictive CSP spread prospects and its opportunities“. Journal of Energy in Southern Africa, vol. 27, (2), pp.50-59.
• Hess, S.; Beukes, H.; Smith, G.; Dinter, F. (2016). “Initial Study on Solar Process Heat for South African Sugar Mills”. International Sugar Journal, pp.236-249.
• Joubert, E.C.; Hess, S.; van Niekerk, J.L. (2016). “Large-Scale Solar Water Heating in South Africa: Status, Barriers and Recommendations”. Renewable Energy, Vol. 97, pp.809-822.
• Landman, W.A.; Grobler, A.; Gauché, P.; Dinter, F. (2016). “Incidence angle effects on circular Gaussian flux density distributions for heliostat imaging”. Solar Energy, Vol. 126, pp. 156-167.
• Pitot de la Beaujardiere, J.P.; Reuter, H.C.R.; Klein, S.A.; Reindl, D.T. (2016). “Impact of HRSG characteristics on open volumetric receiver CSP plant performance”. Solar Energy, Vol.127, pp. 159-174.
• Prinsloo, G.J.; Mammoli, A.; Dobson, R.T. (2016). “Discrete cogeneration optimization with storage capacity decision support for dynamic hybrid solar combined heat and power systems in isolated rural villages“. Energy, Vol. 116 (1), pp. 1051-1064.
• Prinsloo, G.J.; Dobson, R.T.; Mammoli, A. (2016). “Model based design of a novel stirling solar micro-cogeneration system with performance and fuel transition analysis for rural African village locations“. Solar Energy, Vol. 133, pp.315-330.
• Prinsloo, G.J.; Dobson, R.T.; Brent, A.C. (2016). “Scoping exercise to determine load profile archetype reference shapes for solar co-generation models in isolated off-grid rural African villages“. Journal of Energy in Southern Africa, Vol. 27 (3), pp.11-27.

2015

• Allen, K.G.; von Backström, T.W.; Kröger, D.G. (2015). “Rock bed pressure drop and heat transfer: Simple design correlations“. Solar Energy, Vol. 115, pp. 525-536.
• Brooks, M.J.; du Clou, S.; van Niekerk, J.L.; Gauché, P.; Leonard, C.; Mouzouris, M.J.; Meyer, A.J.; van der Westhuizen, N.; van Dyk, E.E.; Vorster, F.J. (2015). “SAURAN: A new resource for solar radiometric data in Southern Africa”. Journal of Energy in Southern Africa, Vol. 26 (1).
• Hoffmann, J.E.; Madaly, K. (2015). “On thermal energy storage capacity for CSP plant in South Africa“. R&D Journal of the South African Institution of Mechanical Engineering, Vol. 31, pp.46-51.
• Louw, F.G.; von Backström, T.W.; van der Spuy, S. J. (2015). “Lift and drag characteristics of an air-cooled heat exchanger axial flow fan“. Journal of Fluids Engineering, Vol. 137 (8).
• Ssebabi, B.; Dobson, R.T.; Sebitosi, A.B. (2015). “Characterising a turbine for application in an organic Rankine cycle“. Energy, Vol. 93 (2), pp.1617-1632.

2014

• Allen, K.G.; von Backström, T.W.; Kröger, D.G.; Kisters, A.F.M. (2014). “Rock bed storage for solar thermal power plants: Rock characteristics, suitability, and availability”. Solar Energy Materials and Solar Cells, Vol. 126, pp. 170-183.
• Coetzee, C.J.; Nel, R.G. (2014). “Calibration of discrete element properties and the modelling of packed rock beds“. Powder Technology, Vol. 264, pp. 332-342.
• Craig, K.J.; Gauché, P.; Kretzschmar, H. (2014). “CFD analysis of solar tower Hybrid Pressurized Air Receiver (HPAR) using a dual-banded radiation model”. Solar Energy, Vol. 110, pp. 338-355.
• Gauché, P.; Brent. A.C.; von Backström, T.W. (2014). “Concentrating solar power: Improving electricity cost and security of supply, and other economy benefits”. Development Southern Africa, Vol. 31 (5), pp. 692-710.
• Grobbelaar. S.; Gauché. P.; Brent. A.C. (2014). “Developing a competitive concentrating solar power industry in South Africa : Current gaps and recommended next steps“. Development Southern Africa, Vol. 31 (3), pp. 475-493.
• Pfenninger. S.; Gauché. P.; Lilliestam. J.; Damerau, K.; Wagner. F.; Patt. A. (2014). “Potential for concentrating solar power to provide baseload and dispatchable power“. Nature Climate Change, Vol. 4, pp: 689-692.

2010-2013

• Allen, K.G. ; von Backström, T. W.; Kröger, D. G. (2013). “Packed bed pressure drop dependence on particle shape size distribution packing arrangement and roughness”. Powder Technology, Vol. 246, pp. 590-600.
• Gauché, P.; von Backström, T. W.; Brent, A. C. (2013). “A concentrating solar power value proposition for South Africa”. Journal of Energy in Southern Africa, Vol. 24 (1).
• Heller, L.; Gauché, P. (2013). “Modeling of the rock bed thermal energy storage system of a combined cycle solar thermal power plant in South Africa”. Solar Energy, Vol. 93, pp. 345-356.
• Janse van Rensburg, P.J.; Groenwold, A.A.; Wood, D.W. (2013). “Optimization of cylindrical composite flywheel rotors for energy storage”. Structural Multidisciplinary Optimization, Vol. 47 (1), pp. 135-147.
• Kotzé, J.P.; von Backström, T.W.; Erens, P.J. (2013). “High Temperature Thermal Energy Storage Utilizing Metallic Phase Change materials and Metallic Heat Transfer Fluids”. Journal of Solar Energy Engineering, Vol. 135 (3).
• Owen, M.; Kröger, D. G. (2013). “Contributors to increased fan inlet temperature at an air-cooled steam condenser”. Applied Thermal Engineering, Vol. 50 (1), pp. 1149-1156.
• Pierce, W.; Gauché, P.; von Backström, T.W.; Brent, A.C.; Tadros, A. (2013). “A comparison of solar aided power generation (SAPG) and stand-alone concentrating solar power (CSP): A South African case study”. Applied Thermal Engineering, Vol. 61 (2), pp. 657-662 .
• Damerau, K.; Williges, K.; Patt, A.G.; Gauché, P. (2011). “Costs of reducing water use of concentrating solar power to sustainable levels: Scenarios for North Africa”. Energy Policy, Vol. 39 (7), pp. 4391-4398.
• Owen, M.T.F.; Kröger, D.G. (2011). “An Investigation of Air-Cooled Steam Condenser Performance Under Windy Conditions Using Computational fluid Dynamics”. Journal of Engineering for Gas Turbines and Power, Vol.133, pp. 064502-1.
• Santos Bernardes, M.A.; von Backström, T.W. (2010). “Evaluation of Operational Control Strategies Applicable to Solar Chimney Power Plants”. Solar Energy, Vol. 84 (2), pp. 277-288.
• Owen, M. T. F.; Kröger, D. G. (2010). “The Effect Of Screens On Air-Cooled Steam Condenser Performance Under Windy Conditions”. Applied Thermal Engineering, Vol.30, pp. 2610-2615.
• Van der Spuy, S.J.; von Backström, T. W.; Kröger, D. G. (2010). “An Evaluation Of Simplified Methods For Modelling The Performance Of Axial Flow Fan Arrays”. R&D Journal of the SA Institution of Mechanical Engineering, Vol. 26, pp. 12-20.
• Westdyk, D.; Kröger, D.G. (2010). “Modelling Evapotranspiration Effects On Air Flowing In A Small Glass Roofed Tunnel”. Journal of Irrigation and Drainage Engineering, Vol. 136 (5), pp. 326-332.

2000-2009

• Santos Bernardes, M.A.; von Backström, T.W.; Kröger, D.G. (2009). “Analysis of some available heat transfer coefficients applicable to solar chimney power plant collectors“. Solar Energy, Vol. 83 (2), pp. 264-275.
• Fluri, T.P.; Pretorius, J.P.; van Dyk, C.; von Backström, T.W.; Kröger, D.G.; van Zijl, G.P.A.G. (2009). “Cost analysis of solar chimney power plants“. Solar Energy, Vol. 83 (2), pp. 246-256.
• Fluri, T.P. (2009). “The potential of concentrating solar power in South Africa“. Energy Policy, Vol. 37 (12), pp. 5075-5080.
• Pretorius , J.P.; Kröger, D.G.; (2009). “The Influence Of Environment On Solar Chimney Power Plant Performance”. R&D Journal of the SA Institution of Mechanical Engineering, Vol. 25, pp. 1-9.
• Van der Spuy, S.J.; von Backström, T.W.; Kröger, D.G. (2009). “Performance Of Low Noise Fans In Power Plant Air Cooled Steam Condensers“. Noise Control Engineering Journal, Vol. 57 (4), pp. 341-347.
• Pretorius, J.P.; Kröger, D.G. (2008). “Incorporating Vegetation Under The Collector Roof Of A Solar Chimney Power Plant“. R&D Journal of the South African Institution of Mechanical Engineering, Vol. 24 (1), pp. 3-11.
• Pretorius, J.P.; Kröger, D.G. (2008). “Thermo-economic Optimization Of A Solar Chimney Power Plant“. Journal of Solar Energy Engineering, Vol. 130 (2), pp. 021015-1-021015-9.
• Van Rooyen, J.A.; Kröger, D.G. (2008). “Performance Trends Of An Air-Cooled Steam Condenser Under Windy Conditions“. Journal of Engineering for Gas Turbines and Power , Vol.130 (2), pp. 023006-1-023006-7.
• Von Backström, T.W.; Harte, R.; Höffer, R.; Krätzig, W.B.; Kröger, D.G.; Niemann, H.-J.; van Zijl, G.P.A.G. (2008). “State And Recent Advances In Research And Design Of Solar Chimney Power Plant Technology“. VGB PowerTech Journal, Vol. 88 (7), pp. 64-71.
• Bredell, J.R.; Kröger, D.G.; Thiart, G.D. (2006). “Numerical investigation into aerodynamic blade loading in large axial flow fans operating under distorted inflow conditions“. R&D Journal of the South African Institution of Mechanical Engineering, Vol. 22 (2), pp. 11-17.
• Pretorius, J.P.; Kröger, D.G. (2006). “Critical evaluation of solar chimney power plant performance“. Solar Energy, Vol. 80 (5), pp. 535-544.
• Pretorius, J.P.; Kröger, D.G. (2006). “Solar Chimney Power Plant Performance“. Journal of Solar Energy Engineering, Vol. 128 (3), pp. 302-311.
• Kloppers, J.C.; Kröger, D.G. (2004). “Cooling Tower Performance: A Critical Evaluation of the Merkel Assumptions“. R&D Journal of the South African Institution of Mechanical Engineering, Vol. 20 (1), pp. 24-29.
• Kloppers, J.C.; Kröger, D.G. (2004). “Cost optimization of cooling tower geometry“. Engineering Optimization, Vol. 36 (5), pp. 575-584.
• Meyer, C.J.; Kröger, D.G. (2004). “Numerical investigation of the effect of fan performance on forced draught air-cooled heat exchanger plenum chamber aerodynamic behaviour“. Applied Thermal Engineering, Vol. 24 (2-3), pp. 359-371.
• Von Backström, T.W.; Gannon, A.J. (2004). “Solar chimney turbine characteristics“. Solar Energy, Vol. 76 (1-3), pp. 235-241.
• Gannon, A.J.; von Backström, T.W. (2003). “Solar chimney turbine performance“. Journal of Solar Energy Engineering, Vol. 125 (1), pp. 101-106.
• Kröger, D.G. (2003). “Evaporation from a water surface exposed to the natural environment“. R&D Journal of the South African Institution of Mechanical Engineering (incorporated into The SA Mechanical Engineer) Vol. 19 (3), pp. 6-10.
• Kröger, D.G. (2002). “Convection heat transfer between a horizontal surface and the natural environment“. R&D Journal of the South African Institution of Mechanical Engineering, Vol. 18 (3), pp. 49-53.
• Kröger, D.G.; Buys, J.D. (2002). “Solar chimney power plant performance characteristics“. R&D Journal of the South African Institution of Mechanical Engineering, Vol. 18 (2), pp. 31-36.
• Lombaard, I.F.; Kröger, D.G. (2002). “Solar collector performance“. R&D Journal of the South African Institution of Mechanical Engineering, Vol. 18 (3), pp. 55-62.
• Stinnes, W.H.; von Backström, T.W. (2002). “Effect of cross-flow on the performance of air-cooled heat exchanger fans“. Applied Thermal Engineering, Vol. 22 (12), pp. 1403-1415.
• Lombaard, I.F.; Kröger, D.G. (2001). “Heat transfer between a horizontal flat surface and the natural environment”. R&D Journal of the South African Institution of Mechanical Engineering, Vol. 17 (2), pp. 47-52.
• Meyer, C.J.; Kröger, D.G. (2001). “Air-cooled heat exchanger inlet flow losses”. Applied Thermal Engineering, Vol. 21 (7), pp. 771-786.
• Smit, L.V.Z.; Kröger, D. G. (2001). “Flow distribution pressure drop flooding and entrainment in air-cooled reflux steam condenser”. R&D Journal of the South African Institution of Mechanical Engineering, Vol. 17 (3), pp. 58-61.
• Gannon, A.J.; von Backström, T.W. (2000). “Solar Chimney Cycle Analysis with System Loss and Solar Collector Performance”. Journal of Solar Energy Engineering, Vol. 122 (3), pp. 133-137.
• Von Backström, T.W.; Gannon, A.J. (2000). “Compressible Flow through Solar Power Plant Chimneys”. Journal of Solar Energy Engineering, Vol. 122 (3), pp. 138-145.
• Von Backström, T.W.; Gannon, A.J. (2000). “The Solar Chimney Air Standard Thermodynamic Cycle”. SAIMechE R&D Journal, Vol. 16 (1), pp. 16-24.

prior to 2000

• Kröger, D.G.; Blaine, D. (1999). “Analysis of the Driving Potential of a Solar Chimney Power Plant“. R&D Journal of the South African Institution of Mechanical Engineering, Vol. 15 (3), pp. 85-94. (Received Campbell Pitt Award).
• Kröger, D.G. (1999). “Development of Industrial Cooling Systems and their Impact on the Environment“. Energy and the Environment, Vol. 15, pp. 163-174.
• Conradie, A E.; Buys, J.D.; Kröger, D.G. (1998). “Performance Optimization of Dry-cooling Systems for Power Plants through SQP Methods“. Applied Thermal Engineering, Vol. 18 (1-2), pp. 25-45.
• Meyer, C.J.; Kröger, D.G. (1998). “Plenum Chamber Flow Losses in Forced Draught Air-cooled Heat Exchangers“. Applied Thermal Engineering, Vol. 18 (9-10), pp. 875-893.
• Zipfel, T.; Kröger, D.G. (1997). “A Design Method for Single Finned-Tube-Row Air-cooled Steam Condenser to avoid Back Flow of Steam into any Finned Tube”. R&D Journal of the South African Institution of Mechanical Engineering, Vol. 13 (2), pp. 68-75.
• Zipfel, T.; Kröger, D.G. (1997). “Flow Loss Coefficients at Air-cooled Condenser Finned Tube Inlets”. R&D Journal of the South African Institution of Mechanical Engineering, Vol. 13 (2), pp. 62-67.
• Beiler, M.G.; Kröger, D.G. (1996). “Thermal Performance Reduction in Air-cooled Heat Exchangers due to Nonuniform Flow and Temperature Distributions“. Heat Transfer Engineering, Vol. 17 (1), pp. 82-92.
• Botes, H.; Kröger, D.G. (1996). “Adiabatic Pre-cooling of the Inlet Air to an Air-cooled Heat Exchanger“. R&D Journal of the South African Institution of Mechanical Engineering Vol. 12 (1), pp. 13-21.
• Conradie, A.E.; Kröger, D.G. (1996). “Performance evaluation of dry-cooling systems for power plant applications“. Applied Thermal Engineering, Vol. 16 (3), pp. 219-232.
• Duvenhage, K.; Kröger, D. G. (1996). “The influence of wind on the performance of forced draught air-cooled heat exchangers“. Journal of Wind Engineering and Industrial Aerodynamics, Vol. 62 (2-3), pp. 259-277.
• Duvenhage, K.; Vermeulen, J.A.; Meyer, C.J.; Kröger, D.G. (1996). “Flow distortions at the fan inlet of forced draught air-cooled heat exchangers“. Applied Thermal Engineering, Vol. 16 (8-9), pp. 741-752.
• Du Preez, A.F.; Kröger, D.G. (1995). “Effect of the Shape of the Tower supports and Walls on the Performance of a Dry-Cooling Tower subjected to Cross-Winds“. Heat Transfer Engineering, Vol. 16 (2), pp. 42-49.
• Du Preez, A.F.; Kröger, D.G. (1995). “The effect of the heat exchanger arrangement and wind-break walls on the performance of natural draft dry-cooling towers subjected to cross-winds“. Journal of Wind Engineering and Industrial Aerodynamics, Vol. 58 (3), pp. 293-303.
• Duvenhage, K.; Kröger, D.G. (1995). “Plume Recirculation in Mechanical-Draft Air-Cooled Heat Exchangers“. Heat Transfer Engineering, Vol. 16 (4), pp. 42-49.
• Salta, C.A.; Kröger, D.G. (1995). “Effect of inlet flow distortions on fan performance in forced draught air-cooled heat exchangers“. Heat Recovery Systems and CHP, Vol. 15 (6), pp. 555-561.
• Kröger, D.G. (1994). “Fan performance in air-cooled steam condensers“. Heat Recovery Systems and CHP, Vol. 14 (4), pp. 391-399.
• Du Preez, A.F.; Kröger, D.G. (1993). “Effect of wind on performance of a dry-cooling tower“. Heat Recovery Systems and CHP, Vol. 13 (2), pp. 139-146.
• Du Preez, A.F.; Kröger, D.G. (1993). “Experimental Investigation into the Influence of Cross-winds on the Performance of Dry-cooling Towers“. R&D Journal of the South African Institution of Mechanical Engineering, Vol. 9 (2), pp. 1-11.
• Du Toit, C.G.; Kröger, D.G. (1993). “Modelling of the recirculation in mechanical-draught heat exchangers“. R&D Engineering, Vol. 9 (1), pp. 2-8.
• Van Aarde, D.J.; Kröger, D.G. (1993). “Flow Losses Through an Array of A-Frame Heat Exchangers“. Heat Transfer Engineering, Vol. 14 (1), pp. 43-51.
• Venter, S.J.; Kröger, D.G. (1991). “An evaluation of methods to predict the system effect present in air-cooled heat exchangers“. Heat Recovery Systems and CHP, Vol. 11 (5), pp. 431-440.
• Buys, J.D.; Kröger, D.G. (1989). “Cost-optimal Design of Dry Cooling Towers through Mathematical Programming Techniques“. Journal of Heat Transfer, Vol. 111 (2), pp. 322-327.
• Buys, J.D.; Kröger, D.G. (1989). “Dimensioning heat exchangers for existing dry cooling towers“. Energy Conversion Management, Vol. 29 (1), pp. 63-71.; Also in R&D Journal of the South African Institution of Mechanical Engineering, Vol. 5 (1), pp. 17-23.
• Kröger, D.G. (1989). “Reduction in Performance Due to Recirculation in Mechanical Draft Cooling Towers“. Heat Transfer Engineering, Vol. 10 (4), pp. 37-43.
• Kröger, D.G. (1988). “Recirculation in air-cooled mechanical draught heat exchangers“. S.A. Mining World, Vol. 7 (10), pp. 65-69.