Journal Articles

2010-today

  • Pitot de la Beaujardiere, J.P.; von Backström, T.W. Reuter, H.C.R. (2017). “Applicability of the local thermal equilibrium assumption in the performance modelling of CSP plant rock bed thermal energy storage systems.” Journal of Energy Storage. 15:39-56.
  • 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.
  • 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. 3:1294-1307.
  • 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.