Journal Articles

2010-today

  • Gauché, P.; Rudman, J.; Mabaso, M.; Landman, W.; von Backström, T.W.; Brent, A.C. (2017). “System value and progress of CSP”. Solar Energy. 
  • Heller, L.; Allen, K.G.; Lubkoll, M.; Pitot de la  Beaujardiere, J.P.; Gauché, P.; Hoffmann, J. (2017). “The SUNDISC cycle: A direct storage-charging dual-pressure air receiver cycle”. Solar Energy. 153:435–444.
  • Pan, C.A.; Dinter, F. (2017). “Combination of PV and central receiver CSP plants for base load power generation in South Africa”. Solar Energy. 146:379–388.
  • Hess, S.; Beukes, H.; Smith, G.; Dinter, F. (2016). “Initial Study on Solar Process Heat for South African Sugar Mills”. Proceedings of the South African Sugar Technologists’ Association (2016) 89: 324-349.
  • 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. 116:1051–1064.
  • Prinsloo, G.J.; Dobson, R.T.; Mammoli, A. (2016). “Model based design of a novel stirling solar microgeneration system with performance and fuel transition analysis for rural African village locations”. Solar Energy. 133:315–330.
  • Prinsloo, G.J.; Dobson, R.T.; Brent, A.C. (2016). “Scoping Exercise to Determine Load Profile Archetype Reference Shapes for Solar Cogeneration Models in Isolated Offgrid Rural African Villages”. Journal of Energy in Southern Africa. 27:11–27.
  • Joubert, E.; Hess, S.; van Niekerk, J.L. (2016). “Large-Scale Solar Water Heating in South Africa: Status, Barriers and Recommendations”. Renewable Energy 97:809-822.
  • Busse, K.T.; Dinter, F. (2016). “Overview of predictive CSP spread prospects and its opportunities”. Journal of Energy in Southern Africa. 27:50–59.
  • 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”. ASME. Journal of Solar Energy Engineering. doi:10.1115/1.4034334
  • 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, 127, pp. 159-174.
  • Landman, W.A.; Grobler, A.; Gauché, P.; Dinter, F. (2016). “Incidence angle effects on circular Gaussian flux density distributions for heliostat imaging”. Solar Energy, 126, pp. 156-167.
  • Ssebabi, B.; Dobson, R.T.; Sebitosi, A.B. (2015). “Characterising a turbine for application in an organic Rankine cycle”. Energy, 93, pp. 1617-1632.
  • 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. (2015). “SAURAN: A new resource for solar radiometric data in Southern Africa”. Journal of Energy in Southern Africa, 26(1): 2-10.
  • Allen, K. G.; von Backström, T. W.; Kröger, D. G. (2015). “Rock bed pressure drop and heat transfer: Simple design correlations”. Solar Energy  115, pp. 525-536.
  • 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 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 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 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 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 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 4.8, pp: 689-692.
  • 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 61.2, pp. 657-662 .
  • Janse van Rensburg, P. J.; Groenwold, A. A.; Wood, D. W. (2013). “Optimization of cylindrical composite flywheel rotors for energy storage”. Struct Multidisc Optim 47.1, pp. 135-147.
  • Kotzé, J. P.; Erens, P. J. (2013). “High Temperature Thermal Energy Storage Utilizing Metallic Phase Change materials and Metallic Heat Transfer Fluids”. Journal of Solar Energy Engineering 135.3.
  • Owen, M.; Kröger, D. G. (2013). “Contributors to increased fan inlet temperature at an air-cooled steam condenser”. Applied Thermal Engineering 50, pp. 1149-1156.
  • Allen, K.; von Backström, T. W.; Kröger, D. G. (2013). “Packed bed pressure drop dependence on particle shape size distribution packing arrangement and roughness”. Powder Technology 246, pp. 590-600.
  • 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 93, pp. 345-356.
  • 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 24.1.
  • 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 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 133, pp. 064502-1.
  • Dos Santos Bernardes, M. A.; von Backström, T. W. (2010). “Evaluation of Operational Control Strategies Applicable to Solar Chimney Power Plants”. Solar Energy 84.2, pp. 277-288.
  • 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 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 136.5, pp. 326-332.
  • Owen, M. T. F.; Kröger, D. G. (2010). “The Effect Of Screens On Air-Cooled Steam Condenser Performance Under Windy Conditions”. Applied Thermal Engineering 30, pp. 2610-2615.
  • Dos 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 83, pp. 264-275.

2000-2010

  • 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 83, pp. 246-256.
  • Fluri, T. P. (2009). “The potential of concentrating solar power in South Africa.”. Energy Policy 37, pp. 5075-5080.
  • 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 57.4, pp. 341-347.
  • 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 2009 25, pp. 1-9.
  • 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 83.2, pp. 246-256.
  • Dos 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 83.2, pp. 264-273.
  • 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 24.1, pp. 3-11.
  • van Rooyen, J. A.; Kröger, D. G. (2008). “Performance Trends Of An Air-Cooled Steam Condenser Under Windy Conditions”. ASME Journal of Engineering for Gas Turbines and Power 130.2, pp. 023006-1-023006-7.
  • Pretorius, J. P.; Kröger, D. G. (2008). “Thermo-economic Optimization Of A Solar Chimney Power Plant”. ASME Journal of Solar Energy Engineering 130, pp. 021015-1-021015-9.
  • 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 88.7, pp. 64-71.
  • Bredell, J. R.; Kröger, D. G.; Thiart, G. D. (2006). “Numerical Investigation of Fan Performance in a Forced Draft Air-Cooled Steam Condenser”. Applied Thermal Engineering 26, pp. 846-852.
  • 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 22.2, pp. 11-17.
  • Pretorius, J. P.; Kröger, D. G. (2006). “Critical Evaluation Of Solar Chimney Power Plant Performance”. Solar Energy 80.5, pp. 535-544.
  • Pretorius, J. P.; Kröger, D. G. (2006). “Solar Chimney Power Plant Performance”. Journal of Solar Energy Engineering 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 20.1, pp. 24-29.
  • 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 24, pp. 359-371.
  • Kloppers, J. C.; Kröger, D. G. (2004). “Cost Optimization of Cooling Tower Geometry”. Engineering Optimization 36.5, pp. 575-584.
  • von Backström, T. W.; Gannon, A. J. (2004). “Solar Chimney Turbine Characteristics”. Solar Energy 76.1-3, pp. 235-241.
  • 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) 19.3, pp. 6-10.
  • Kröger, D. G.; Buys, J. D. (2002). “Solar Chimney Power Plant Performance Characteristics”. R & D Journal of the South African Institution of Mechanical Engineering 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 18.3, pp. 55-62.
  • 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 18.3, pp. 49-53.
  • Stinnes, W. H.; von Backström, T. W. (2002). “Effect of Cross-flow on the Performance of Air-cooled Heat Exchanger Fans”. Applied Thermal Engineering 22.12, pp. 1403-1415.
  • Meyer, C. J.; Kröger, D. G. (2001). “Air-cooled Heat Exchanger Inlet Flow Losses”. Applied Thermal Engineering 21.7, pp. 771-786.
  • 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 17.2, pp. 47-52.
  • Van Zyl Smit, L.; 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 17.3, pp. 58-61.
  • von Backström, T. W.; Gannon, A. J. (2000). “The Solar Chimney Air Standard Thermodynamic Cycle”. SAIMechE R & D Journal 16.1, pp. 16-24.
  • Gannon, A. J.; von Backström, T. W. (2000). “Solar Chimney Cycle Analysis with System Loss and Solar Collector Performance”. Journal of Solar Energy Engineering 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 122.3, pp. 138-145.

prior to 2000

  • Kröger, D. G. (1999). “Development of Industrial Cooling Systems and their Impact on the Environment”. Energy and the Environment 15, pp. 163-174.
  • 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 15.3, pp. 85-94. (Received Campbell Pitt Award).
  • 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 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 18.9-10, pp. 875-893.
  • 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 13.2, pp. 62-67.
  • 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 13.2, pp. 68-75.
  • 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 12.1, pp. 13-21.
  • 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 16.8/9, pp. 741-752.
  • Conradie, A. E.; Kröger, D. G. (1996). “Performance Evaluation of Dry-cooling Systems for Power Plant Applications”. Applied Thermal Engineering 16.3, pp. 219-232.
  • Beiler, M.; Kröger, D. G. (1996). “Thermal Performance Reduction in Air-cooled Heat Exchangers due to Nonuniform Flow and Temperature Distributions”. Heat Transfer Engineering 17.1, pp. 82-92.
  • 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 62, pp. 259-277.
  • 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 (now known as Applied Thermal Engineering) 15.6, pp. 555-561.
  • Du Preez, 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 16.2, pp. 42-49.
  • Duvenhage, K.; Kröger, D. G. (1995). “Plume Recirculation in Mechanical-draft Air-cooled Heat Exchangers”. Heat Transfer Engineering 16.4, 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 58, pp. 293-303.
  • Kröger, D. G. (1994). “Fan performance in Air-cooled Steam Condensers”. Heat Recovery Systems and CHP 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 (now known as Applied Thermal Engineering) 13.2, pp. 139-146.
  • Du Toit, C. G.; Kröger, D. G. (1993). “Modelling of the Recirculation in Mechanical-draught Heat Exchangers”. R & D Engineering 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 14.1, pp. 43-51.
  • 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 9.2, pp. 1-11.
  • 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 (now known as Applied Thermal Engineering) 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 111.2, pp. 322-327.
  • Buys, J. D.; Kröger, D. G. (1989). “Dimensioning Heat Exchangers for existing Dry Cooling Towers”. Energy Conversion Management 29.1, pp. 63-71.; Also in R & D Journal of the South African Institution of Mechanical Engineering 5.1, pp. 17-23.
  • Kröger, D. G. (1989). “Reduction in Performance due to Recirculation in Mechanical-draft Cooling Towers”. Heat Transfer Engineering Journal 10.4, pp. 37-43.
  • Kröger, D. G. (1988). “Recirculation in air-cooled mechanical draught heat exchangers”. S.A. Mining World 7.10, pp. 65-69.