Investigation of a radial turbine design for a utility-scale supercritical CO2 power cycle

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dc.contributor.authorEl Samad, Tala
dc.contributor.authorTeixeira, Joao Amaral
dc.contributor.authorOakey, John
dc.date.accessioned2020-08-12T15:52:49Z
dc.date.available2020-08-12T15:52:49Z
dc.date.issued2020-06-17
dc.description.abstractThis paper presents the design procedure and analysis of a radial turbine design for a mid-scale supercritical CO2 power cycle. Firstly, thermodynamic analysis of a mid-range utility-scale cycle, similar to that proposed by NET Power, is established while lowering the turbine inlet temperature to 900 ◦C in order to remove cooling complexities within the radial turbine passages. The cycle conditions are then considered for the design of a 100 MWth power scale turbine by using lower and higher fidelity methods. A 510 mm diameter radial turbine, running at 21,409 rpm, capable of operating within a 5% range of the required cycle conditions, is designed and presented. Results from computational fluid dynamics simulations indicate the loss mechanisms responsible for the low-end value of the turbine total-to-total efficiency which is 69.87%. Those include shock losses at stator outlet, incidence losses at rotor inlet, and various mixing zones within the passage. Mechanical stress calculations show that the current blade design flow path of the rotor experiences tolerable stress values, however a more detailed re-visitation of disc design is necessitated to ensure an adequate safety margin for given materials. A discussion of the enabling technologies needed for the adoption of a mid-size radial turbine is given based on current advancements in seals, bearings, and materials for supercritical CO2 cyclesen_UK
dc.identifier.citationEl Samad T, Amaral Teixeira J, Oakey J. (2020) Investigation of a radial turbine design for a utility-scale supercritical CO2 power cycle. Applied Sciences, Volume 10, Issue 12, June 2020, Article number 4168en_UK
dc.identifier.issn2076-3417
dc.identifier.urihttps://doi.org/10.3390/app10124168
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/15676
dc.language.isoenen_UK
dc.publisherMDPIen_UK
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectNET Poweren_UK
dc.subjectturbomachinery designen_UK
dc.subjectutility-scaleen_UK
dc.subjectradial turbineen_UK
dc.subjectsupercritical carbon dioxideen_UK
dc.titleInvestigation of a radial turbine design for a utility-scale supercritical CO2 power cycleen_UK
dc.typeArticleen_UK

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