Academic Qualifications

• B. Eng. (Mechanical), Stellenbosch, 1985
• M. Eng. (Mechanical), Stellenbosch, 1987
• Ph. D. (Mech. Eng.), Stellenbosch, 1997

Professional Experience

Fields of research

Solar thermal energy
Dispersed two-phase flow

Fields of interest

Thermodynamics, Heat Transfer & Fluid Mechanics, Stochastic Optimization

Publications, Presentations and Patents

2016

Journal Articles

HOFFMANN JE, VAN DER MERWE PC. Testing and analysis of low pressure, transparent tube solar receiver for the sunspot cycle.

Proceedings National

DALL EP, PIDAPARTHI AS, HOFFMANN JE, DINTER F. CSP parabolic trough and power tower performance analysis through the southern african universities radiometric network (SAURAN) data. AIP Conference, SolarPaces 2015, Cape Town, South Africa, AIP Publishers 2016: 1-6.

HELLER LJ, HOFFMANN JE, GAUCHE P. The hybrid pressurized air receiver (HPAR) in the SUNDISC cycle. AIP Conference, SolarPaces 2015, Cape Town, South Africa, AIP Publishers 2016: 1-8.

2015

Journal Articles (subsidised)

HOFFMANN JE, MADALY K. On thermal energy storage capacity for CSP plant in South Africa. R&D Journal 2015; 31:27-32.

Proceedings International

HELLER LJ, HOFFMANN JE. A cost and performance evaluation of SUNDISC: a dual-pressure air receiver cycle. In: Wang Z (ed.) International Conference on Concentrating Solar Power and Chemical Energy Systems, SolarPACES 2014(Energy Procedia), Beijing, China, Elsevier 2015: 1287-1295.

Proceedings National

HELLER LJ, HOFFMANN JE. Comparison of different configurations of a combined cycle CSP plant. 2nd Southern African Solar Energy Conference (SASEC), Port Elizabeth, South Africa, EDAS, National Library of South Africa 2014: 1-6.

HELLER LJ, MESNIL B, HOFFMANN JE. Initial Investigation of Liquid Glass as a Thermal Medium in CSP Plants. 3rd Southern African Solar Energy Conference, Skukuza, Kruger National Park, South Africa, UPSpace Institutional Repository - Dept of Library Services 2015: 1-8.

HOFFMANN JE. Identifying the optimum storage capacity for a 100MW CSP plant in South Africa. 2nd Southern African Solar Energy Conference, Port Elizabeth, South Africa, EDAS, National Library of South Africa 2014: 1-8.

HOFFMANN JE. Optimization of Internally Finned Tubes for Solar Receivers. 2nd Southern African Solar Energy Conference (SASEC), Port Elizabeth, South Africa, EDAS, National Library of South Africa 2014: 1-8.

VAN DER MERWE PC, HOFFMANN JE. Annular solar receiving tube. 2nd Southern African Solar Energy Conference (SASEC), Port Elizabeth, South Africa, EDAS, National Library of South Africa 2014: 1-8.

Masters completed

CRAIG OO, HOFFMANN JE, DOBSON RT. A stand-alone parabolic dish solar cooker for African conditions . MIng Navorsing, 2015. 84 pp.

VAN DER WESTHUIZEN JJ, HOFFMANN JE. Liquid Extraction on Air Cooled Condensor Steam Ducts . MIng Navorsing, 2015. 113 pp.

2014

HELLER L, HOFFMANN JE. Comparison of different configurations of a combined cycle CSP plant. 2nd Southern African Solar Energy Conference (SASEC2014), Port Elizabeth, South Africa, 2014: 1-7.

HOFFMANN JE. Optimization of Internally Finned Tubes for Solar Receivers. 2nd Southern African Solar Energy Conference (SASEC2014), Port Elizabeth, South Africa, 2014: 1-8.

MADALY K, HOFFMANN JE. Identifying the optimum storage capacity for a 100MW CSP plant in South Africa. 2nd Southern African Solar Energy Conference (SASEC2014), Port Elizabeth, South Africa, 2014: 1-8.

VAN DER MERWE PC, HOFFMANN JE. Annular solar receiving tube. 2nd Southern African Solar Energy Conference (SASEC2014), Port Elizabeth, South Africa, 2014: 1-8.

VAN DER WESTHUIZEN J, HOFFMANN JE, PRETORIUS J. Liquid Extraction on Air Cooled Condenser Steam Ducts. 9th South African Conference on Computational and Applied Mechanics 2014 (SACAM2014), Somerset West, South Africa, 2014: 1-10.

2001

 J.E. Hoffmann, Particle Laden Flow through an Open Bifurcation in a Vertical Duct with Rectangular Cross-section, R&D Journal, Vol. 17, pp. 62 - 68, November 2001

Conference Proceedings

1. J.E. Hoffmann and D.G. Kröger, Heat, Mass and Momentum Transfer in the Rain Zone of a Large Natural Draft Cooling Tower, Proceedings of the 9th International Heat Transfer Conference, Jerusalem, 1990.

2. J.E. Hoffmann, J.P.S. du Preez and F.P. Farrell, Managing Excessive Wear Rates on Economiser Tubes in a Pulverised Coal Fired Boiler, Proceedings of Tribology ’94, Pretoria, 1994.

3. G.W. Hasse and J.E. Hoffmann, Investigation into the Mechanism Causing Cracking of the Reheater Attemperator Sleeves at Matimba Power Station, Proceedings of the 1st South African Conference on Applied Mechanics, Midrand, 1996.

4. J.E. Hoffmann and D.G. Kröger, The Response of a Large Natural Draft Dry- Cooling Tower to Ambient Temperature Stratification, Proceedings of the EPRI Conference, St. Petersburg, USA, 1997.

5. J.E. Hoffmann and G.W. Hasse, Review: Particle/Wall Collision Models and Particle/Fluid Turbulence Interaction for Two-phase Flow Modelling, SACAM 1998, Cape Town, 1998.

6. W. Schmitz, D. Gibson, J. Hoffmann, M. van Staden and C. van Rensburg, Application of CFD in the Power Industry, Vorträge zum Kongress Kraftwerke 1999, Essen, 1999.

7. J.E. Hoffmann and K.J. Craig, Particle Laden Flow through a Mini-Classifier, SACAM 2000, Durban, January 2000.

8. J.E. Hoffmann, Porosity Model for Oblique Flow through In-Line Tube Banks, Submitted for publication in R&D Journal, February 2002.

9. J.E. Hoffmann, Validation and Verification of CFD Simulations at PBMR, SACAM 2004, Muldersdrift, January 2004.

10. J.E. Hoffmann, Oblique Flow Through Expanded Metal Screens, SACAM 2004, Muldersdrift, January 2004.

11. J. Janse van Rensburg, J. E Hoffmann and M.P. van Staden, CFD Modeling of the PBMR Reactor Unit, HTR-2006, Johannesburg, October 2006.

12. J.E. Hoffmann, Thermal Radiation in a Packed Bed with Internal Heat Generation, ASME Summer Heat Transfer Conference, Jacksonville, August 2008.

13. J.E. Hoffmann, Dual Mesh Approach for Transient Modeling of Plate Heat Exchangers, ICONE 17, Brussels, July 2009. (Paper was accepted but had to be withdrawn).

14. K.J. Craig, A.W. Harkness, H.P. Kritzinger and J.E. Hoffmann, Analysis of AP1000 Reactor Vessel Cavity and Support Cooling, European Nuclear Conference, Barcelona, June 2010.