City Research Online

Article

Ogrodniczak, P., Sayma, A. & White, M. T. ORCID: 0000-0002-7744-1993 (2025). Optimisation of a converging-diverging nozzle for the wet-to-dry expansion of the siloxane MM. Applied Thermal Engineering, 260, article number 124870. doi: 10.1016/j.applthermaleng.2024.124870

Aqel, O., White, M. ORCID: 0000-0002-7744-1993 & Sayma, A. ORCID: 0000-0003-2315-0004 (2024). Loss Analysis in Radial Inflow Turbines for Supercritical CO2 Mixtures. Journal of Turbomachinery, 146(5), article number 051003. doi: 10.1115/1.4064193

Abdeldayem, A. S., Salah, S. I., Aqel, O. A. , White, M. T. ORCID: 0000-0002-7744-1993 & Sayma, A. I. ORCID: 0000-0003-2315-0004view all authors (2024). Design of a 130 MW Axial Turbine Operating with a Supercritical Carbon Dioxide Mixture for the SCARABEUS Project. International Journal of Turbomachinery, Propulsion and Power, 9(1), article number 5. doi: 10.3390/ijtpp9010005

Abdeldayem, A., Paggini, A., Diurno, T. , Orazi, C., White, M. ORCID: 0000-0002-7744-1993, Ruggiero, M. & Sayma, A. I. ORCID: 0000-0003-2315-0004view all authors (2024). Integrated Aerodynamic and Mechanical Design of a Large-Scale Axial Turbine Operating With A Supercritical Carbon Dioxide Mixture. Journal of Engineering for Gas Turbines and Power, 146(2), article number 021011. doi: 10.1115/1.4063530

Salah, S. I., Abdeldayem, A. S., White, M. ORCID: 0000-0002-7744-1993 & Sayma, A. I. ORCID: 0000-0003-2315-0004view all authors (2024). Off-design performance assessment of an axial turbine for a 100 MWe concentrated solar power plant operating with CO2 mixtures. Applied Thermal Engineering, 238, article number 122001. doi: 10.1016/j.applthermaleng.2023.122001

Ogrodniczak, P. & White, M. ORCID: 0000-0002-7744-1993 (2023). Non-equilibrium CFD simulation of the wet-to-dry expansion of the siloxane MM in a converging–diverging nozzle. Applied Thermal Engineering, 234, article number 121158. doi: 10.1016/j.applthermaleng.2023.121158

Abdeldayem, A. S., Salah, S. I., White, M. T. ORCID: 0000-0002-7744-1993 & Sayma, A. I. ORCID: 0000-0003-2315-0004view all authors (2023). A Modified Loss Breakdown Approach for Axial Turbines Operating With Blended Supercritical Carbon Dioxide. Journal of Engineering for Gas Turbines and Power, 145(8), article number 081002. doi: 10.1115/1.4062478

Salah, S., Crespi, F., White, M. ORCID: 0000-0002-7744-1993 , Munoz, A., Paggini, A., Ruggiero, M., Sanchez, D. & Sayma, A. I. ORCID: 0000-0003-2315-0004view all authors (2023). Axial turbine flow path design for concentrated solar power plants operating with CO2 blends. Applied Thermal Engineering, 230(Part A), article number 120612. doi: 10.1016/j.applthermaleng.2023.120612

Abdeldayem, A. A., White, M. ORCID: 0000-0002-7744-1993, Paggini, A. , Ruggiero, M. & Sayma, A.view all authors (2022). Integrated Aerodynamic and Structural Blade Shape Optimisation of Axial Turbines Operating with Supercritical Carbon Dioxide Blended with Dopants. Journal of Engineering for Gas Turbines and Power: Transactions of the ASME, 144(10), article number 101016. doi: 10.1115/1.4055232

White, M. ORCID: 0000-0002-7744-1993 (2022). Investigating the wet-to-dry expansion of organic fluids for power generation. International Journal of Heat and Mass Transfer, 192, article number 122921. doi: 10.1016/j.ijheatmasstransfer.2022.122921

Salah, S., White, M. ORCID: 0000-0002-7744-1993 & Sayma, A. I. ORCID: 0000-0003-2315-0004 (2022). A comparison of axial turbine loss models for air, sCO₂ and ORC turbines across a range of scales. International Journal of Thermofluids, 15, article number 100156. doi: 10.1016/j.ijft.2022.100156

White, M. ORCID: 0000-0002-7744-1993 & Turunen-Saaresti, T. (2021). Simulation of a supersonic stator vane under two-phase inlet conditions. Proceedings of the 6th International Seminar on ORC Power Systems, doi: 10.14459/2021mp1632898

White, M. ORCID: 0000-0002-7744-1993 (2021). Cycle and turbine optimisation for an ORC operating with two-phase expansion. Applied Thermal Engineering, 192, article number 116852. doi: 10.1016/j.applthermaleng.2021.116852

White, M. ORCID: 0000-0002-7744-1993, Bianchi, G., Chai, L. , Tassou, S. A. & Sayma, A. I. ORCID: 0000-0003-2315-0004view all authors (2021). Review of supercritical CO2 technologies and systems for power generation. Applied Thermal Engineering, 185(116447), article number 116447. doi: 10.1016/j.applthermaleng.2020.116447

Aqel, O., White, M. ORCID: 0000-0002-7744-1993, Khader, M. A. ORCID: 0000-0002-5771-2258 & Sayma, A. I. ORCID: 0000-0003-2315-0004view all authors (2021). Sensitivity of transcritical cycle and turbine design to dopant fraction in CO2-based working fluids. Applied Thermal Engineering, 190, article number 116796. doi: 10.1016/j.applthermaleng.2021.116796

White, M. ORCID: 0000-0002-7744-1993, Read, M. G. ORCID: 0000-0002-7753-2457 & Sayma, A. I. ORCID: 0000-0003-2315-0004 (2020). Making the case for cascaded organic Rankine cycles for waste-heat recovery. Energy, 211, article number 118912. doi: 10.1016/j.energy.2020.118912

White, M. ORCID: 0000-0002-7744-1993 & Sayma, A. I. (2020). A new method to identify the optimal temperature of latent-heat thermal-energy storage systems for power generation from waste heat. International Journal of Heat and Mass Transfer, 149, article number 119111. doi: 10.1016/j.ijheatmasstransfer.2019.119111

White, M. ORCID: 0000-0002-7744-1993 & Sayma, A. I. ORCID: 0000-0003-2315-0004 (2020). Fluid Selection for Small-Scale Rankine Cycle Plants: Can You Draw Some Lines in the Sand?. IIR Rankine Conference 2020, article number 1161. doi: 10.18462/iir.rankine.2020.1161

Salah, S., Khader, M. A., White, M. T. ORCID: 0000-0002-7744-1993 & Sayma, A. I. ORCID: 0000-0003-2315-0004view all authors (2020). Mean-Line Design of a Supercritical CO2 Micro Axial Turbine. Applied Sciences, 10(15), article number 5069. doi: 10.3390/app10155069

White, M. ORCID: 0000-0002-7744-1993, Read, M. G. & Sayma, A. I. (2019). Comparison between single and cascaded organic Rankine cycle systems accounting for the effects of expansion volume ratio on expander performance. IOP Conference Series: Materials Science and Engineering, 604(1), article number 12086. doi: 10.1088/1757-899X/604/1/012086

White, M. ORCID: 0000-0002-7744-1993 & Sayma, A. I. (2019). Simultaneous Cycle Optimization and Fluid Selection for ORC Systems Accounting for the Effect of the Operating Conditions on Turbine Efficiency. Frontiers in Energy Research, 7(JUN), article number 50. doi: 10.3389/fenrg.2019.00050

White, M. ORCID: 0000-0002-7744-1993, Oyewunmi, O. A., Chatzopoulou, M. A. , Pantaleo, A. M., Haslam, A. J. & Markides, C. N.view all authors (2018). Computer-aided working-fluid design, thermodynamic optimisation and technoeconomic assessment of ORC systems for waste-heat recovery. Energy, 161, pp. 1181-1198. doi: 10.1016/j.energy.2018.07.098

White, M. ORCID: 0000-0002-7744-1993 & Sayma, A. I. ORCID: 0000-0003-2315-0004 (2018). A generalised assessment of working fluids and radial turbines for organic Rankine cycles. Energies, 11(4), article number 800. doi: 10.3390/en11040800

White, M. ORCID: 0000-0002-7744-1993, Markides, C. & Sayma, A. I. (2017). Working-Fluid replacement in supersonic organic Rankine Cycle Turbines. Journal of Engineering for Gas Turbines and Power, 140(9), article number 091703. doi: 10.1115/1.4038754

White, M. ORCID: 0000-0002-7744-1993, Oyewunmi, O. A., Haslam, A. J. & Markides, C. N.view all authors (2017). Industrial waste-heat recovery through integrated computer-aided working-fluid and ORC system optimisation using SAFT-Γ Mie. Energy Conversion and Management, 150, pp. 851-869. doi: 10.1016/j.enconman.2017.03.048

White, M. ORCID: 0000-0002-7744-1993, Oyewunmi, O. A., Chatzopoulou, M. T. , Pantaleo, A. M., Haslam, A. J. & Markides, C. N.view all authors (2017). Integrated computer-aided working-fluid design and thermoeconomic ORC system optimisation. Energy Procedia, 129, pp. 152-159. doi: 10.1016/j.egypro.2017.09.095

White, M. ORCID: 0000-0002-7744-1993, Sayma, A. I. & Markides, C. (2017). Supersonic flow of non-ideal fluids in nozzles: An application of similitude theory and lessons for ORC turbine design and flexible use considering system performance. Journal of Physics: Conference Series, 821(1), article number 012002. doi: 10.1088/1742-6596/821/1/012002

Unamba, C. K., White, M. ORCID: 0000-0002-7744-1993, Sapin, P. , Freeman, J., Lecompte, S., Oyewunmi, O. A. & Markides, C. N.view all authors (2017). Experimental Investigation of the Operating Point of a 1-kW ORC System. Energy Procedia, 129, pp. 875-882. doi: 10.1016/j.egypro.2017.09.211

White, M. ORCID: 0000-0002-7744-1993 & Sayma, A. I. (2016). Improving the economy-of-scale of small organic rankine cycle systems through appropriate working fluid selection. Applied Energy, 183, pp. 1227-1239. doi: 10.1016/j.apenergy.2016.09.055

White, M. ORCID: 0000-0002-7744-1993 & Sayma, A. I. (2015). The Application of Similitude Theory for the Performance Prediction of Radial Turbines Within Small-Scale Low-Temperature Organic Rankine Cycles. Journal of Engineering for Gas Turbines and Power, 137(12), pp. 1-10. doi: 10.1115/1.4030836

White, M. ORCID: 0000-0002-7744-1993 & Sayma, A. I. (2015). System and component modelling and optimisation for an efficient 10 kWe low-temperature organic Rankine cycle utilising a radial inflow expander. Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, 229(7), pp. 795-809. doi: 10.1177/0957650915574211

White, M. ORCID: 0000-0002-7744-1993 & Sayma, A. I. (2015). The impact of component performance on the overall cycle performance of small-scale low temperature organic Rankine cycles. IOP Conference Series: Materials Science and Engineering, 90(1), article number 012063. doi: 10.1088/1757-899x/90/1/012063

Conference or Workshop Item

Abdeldayem, A., Paggini, A., Diurno, T. , Orazi, C., White, M. ORCID: 0000-0002-7744-1993, Ruggiero, M. & Sayma, A. I. ORCID: 0000-0003-2315-0004view all authors (2023). Integrated Aerodynamic and Mechanical Design of a Large-Scale Axial Turbine Operating With Supercritical Carbon Dioxide Mixtures. In: Proceedings of the ASME Turbo Expo 2023. ASME Turbo Expo 2023: Turbomachinery Technical Conference and Exposition, 26-30 Jun 2023, Boston, USA. doi: 10.1115/GT2023-102236

Abdeldayem, A., Salah, S., Aqel, O. , White, M. ORCID: 0000-0002-7744-1993 & Sayma, A. I. ORCID: 0000-0003-2315-0004view all authors (2023). Design of a 130 MW axial turbine operating with a supercritical carbon dioxide mixture for the SCARABEUS project. In: European Conference on Turbomachinery Fluid Dynamics and Thermodynamics, ETC. 15th European Conference on Turbomachinery Fluid dynamics & Thermodynamics, 24-28 Apr 2023, Budapest, Hungary.

Aqel, O., White, M. ORCID: 0000-0002-7744-1993 & Sayma, A. I. ORCID: 0000-0003-2315-0004 (2023). Loss Analysis in Radial Inflow Turbines for Supercritical CO2 Mixtures. In: Proceedings of the ASME Turbo Expo. ASME Turbo Expo 2023: Turbomachinery Technical Conference and Exposition, 26-30 Jun 2023, Boston, USA. doi: 10.1115/GT2023-102556

AbdElDayem, A., White, M. ORCID: 0000-0002-7744-1993 & Sayma, A. I. ORCID: 0000-0003-2315-0004 (2021). Comparison of CFD predictions of supercritical carbon dioxide axial flow turbines using a number of turbulence models. In: Proceedings of the ASME Turbo Expo 2021: Turbomachinery Technical Conference and Exposition. ASME Turbo Expo 2021: Turbomachinery Technical Conference and Exposition, 7-11 Jun 2021, Online. doi: 10.1115/GT2021-58883

Aqel, O., White, M. ORCID: 0000-0002-7744-1993 & Sayma, A. I. ORCID: 0000-0003-2315-0004 (2021). Binary interaction uncertainty in the optimisation of a transcritical cycle: Consequences on cycle and turbine design. Paper presented at the 4th European sCO2 Conference for Energy Systems, 23-24 Mar 2021, Online. doi: 10.17185/duepublico/73959

White, M. ORCID: 0000-0002-7744-1993 (2021). Investigating the Validity of the Fundamental Derivative in the Equilibrium and Non-equilibrium Two-Phase Expansion of MM. In: Pini, M., De Servi, C., Spinelli, A. , di Mare, F. & Guardone, A.view all authors (Eds.), Proceedings of the 3rd International Seminar on Non-Ideal Compressible Fluid Dynamics for Propulsion and Power. NICFD 2020. doi: 10.1007/978-3-030-69306-0_1

White, M. ORCID: 0000-0002-7744-1993, Read, M. G. ORCID: 0000-0002-7753-2457 & Sayma, A. I. ORCID: 0000-0003-2315-0004 (2019). A comparison between cascaded and single-stage ORC systems taken from the component perspective. In: Sotirios, K. & Kakaras, E. (Eds.), Proceedings of the 5th International Seminar on ORC Power Systems.

White, M. ORCID: 0000-0002-7744-1993, Read, M. G. ORCID: 0000-0002-7753-2457 & Sayma, A. I. ORCID: 0000-0003-2315-0004 (2018). Using a cubic equation of state to identify optimal working fluids for an ORC operating with two-phase expansion using a twin-screw expander. In: International Refrigeration and Air Conditioning Conference. 17th International Refrigeration and Air Conditioning Conference, 09-12 Jul 2018, West Lafayette, USA.

White, M. ORCID: 0000-0002-7744-1993, Read, M. G. & Sayma, A. I. (2018). Optimisation of cascaded organic Rankine cycle systems for high-temperature waste-heat recovery. Paper presented at the ECOS 2018 - The 31st International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems, 17 - 22 June 2018, Guimarães, Portugal.

White, M. ORCID: 0000-0002-7744-1993 & Sayma, A. I. ORCID: 0000-0003-2315-0004 (2018). Design of a closed-loop optical-access supersonic test facility for organic vapours. In: ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition. ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition, 11-15 Jun 2018, Oslo, Norway. doi: 10.1115/GT2018-75301

White, M. ORCID: 0000-0002-7744-1993 & Sayma, A. I. ORCID: 0000-0003-2315-0004 (2018). A preliminary comparison of different turbine architectures for a 100 kW supercritical CO2 Rankine cycle turbine. Paper presented at the The 6th International Supercritical CO2 Power Cycles Symposium, 27 - 29 Mar 2018, Pittsburgh, Pennsylvania.

White, M. ORCID: 0000-0002-7744-1993 & Sayma, A. I. (2015). The one-dimensional meanline design of radial turbines for small scale low temperature organic rankine cycles. In: ASME Turbo Expo 2015: Turbine Technical Conference and Exposition. ASME Turbo Expo 2015: Turbine Technical Conference and Exposition, 15-19 Jun 2015, Montreal, Canada. doi: 10.1115/GT2015-42466

Report

Forth, J. ORCID: 0000-0001-7963-2817 & White, M. (1998). Pathways through Unemployment: The Effects of a Flexible Labour Market. York, UK: Joseph Rowntree Foundation.

Thesis

White, M. ORCID: 0000-0002-7744-1993 (2015). The design and analysis of radial inflow turbines implemented within low temperature organic Rankine cycles. (Unpublished Doctoral thesis, City University London)