Presentations of ETN’s 5th episode of the webinar series on R& Activities on sCO2 in Europe already available

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We are very glad to announce that the presentations of the 5th webinar on R&D Activities on sCO2 Activities in Europe are now available for download.

 

Organised by ETN Global, coordinator of the CO2OLHEAT Project, this last event was focused on expander technology. Expanders pose the twofold challenge of achieving high efficiency and contain extreme pressures and temperatures, whilst also requiring new sealing technology that is different from that used in steam and gas turbines. These topics were covered in three very interesting, complementary talks by industry representatives:

  • Which boundary conditions for CO2turbines?, Alberto Traverso (University of Genoa
  • Expander stage of an sCO2Companderfor 2 MW output power, Markus Sauerborn (Atlas Copco)
  • Benefits and design challenges of axial sCO2turbines, Stefan Glos (Siemens Energy)
  • Baker Hughes Design Experience with unfired Expanders, Andrea Paggini (Baker Hughes)

 

Follow this link to get your copy of the presentations and video: Link

 

SCARABEUS represented at the 7th International Seminar on Organic Rankine Cycle Power Systems

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The SCARABEUS project was well represented by researchers from University of Seville at the 7th International Seminar on Organic Rankine Cycle (ORC) Power Systems, held in Seville between September 4th and 6th.

Two papers were presented at the conference, dealing with different aspects of supercritical cycles working on Carbon Dioxide mixtures in Concentrated Solar Power applications:

  • Rodríguez de Arriba et al, Mapping the techno-economic potential of next-generation CSP plants running on transcritical CO2-based power cycles

Abstract

Although the thermodynamic potential of transcritical/supercritical CO2-based power cycles for next generation Concentrated Solar Power plants has been already confirmed in literature, further investigation to assess the actual feasibility of this technology from a techno-economic standpoint is needed. In fact, large uncertainty is found when it comes to the estimation of the CAPEX and OPEX of the power block, and the same can be said for the solar subsystem when high Turbine Inlet Temperatures are considered (>700 ºC).

Bearing this in mind, this paper presents a methodology to map the techno-economic potential of next-generation Concentrated Solar Power plants running on CO2-based mixtures, with the final aim to identify the threshold (breakeven) costs of the main subsystems enabling a clear gain in terms of Levelised Cost of Electricity with respect to state-of-the-art steam-based CSP.

Two different systems are studied which differ in the composition and peak temperature of the Heat Transfer Medium: a SoA molten salts system operating at a TIT of 550 ºC (Gen I) and a solid particle system with TIT=700 ºC (Gen II). An integrated platform able to simulate all CSP plant subsystems and perform hourly calculations is built in Matlab employing Artificial Neural Networks to simulate the solar field, ensuring extremely high computational speed.

To overcome the high uncertainty in terms of cost estimation, a two-step analysis is developed: firstly, the CAPEX of the entire plant is calculated assuming correlations from literature, except for the power block, whose estimate brings about the largest uncertainty. As a result, the minimum power block cost allowing a LCoE lower than a certain target is identified. Secondly, an inverse methodology is applied, setting the power block cost and assessing the minimum CAPEX of the solar subsystem. As a result, a map is obtained showing the target CAPEX to be accomplished by sCO2+CSP if a clear reduction of the LCoE of this technology is to be achieved

  • Crespi et al., Operational optimisation of the main heat rejection unit of CSP plants based on carbon dioxide mixtures

Abstract

This research, developed in the framework of the SCARABEUS project, studies the off-design performance of transcritical power cycles running on CO2-SO2 mixtures in Concentrated Solar Power applications. The objective of this work is to identify optimum operational strategies that maximise net energy production when exposed to variable ambient temperature, with special focus on the operation of the Heat Rejection Unit (Air-Cooled Condenser). The power cycle is simulated in Thermoflex, modified with user-defined scripts to account for the specific off-design performance characteristics of key components. The Air-Cooled Condenser is modelled by means of an in-house Matlab tool, already validated in previous publications, able to accurately simulate the heat transfer process between working fluid and cooling medium (air) and to calculate auxiliary power consumption.

Four different strategies are identified, depending on ambient temperature: variable or constant condensation pressure for ambient temperatures lower than the design value, and constant turbine inlet temperature or constant return temperature of the heat transfer fluid for ambient temperature higher than design value. The results show that a combination of variable and constant minimum cycle pressure is the best alternative for low ambient temperatures, enabling net system efficiencies higher than 41%. On the other hand, constant turbine inlet temperature enables higher net performance than constant return temperature of the heat transfer fluid, even if at the expense of a reduction in energy storage capacity for the same inventory of molten salts

 

The papers will be published in the Conference Proceedings and they will be available for download free of charge. Congratulations SCARABEUS team at University of Seville on this excellent dissemination action!

Final dissemination event in Seville

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Prof. David Sánchez, Dissemination Coordinator of SCARABEUS

As announced in recent months, a final dissemination event was organised by the SCARABEUS project team with the aim to disclose the most relevant results and outcomes of the project. The event was collocated with the 7th International Seminar on Organic Rankine Cycle (ORC) Power Systems, held in Seville between September 4th and 6th. This conference takes place every two years, organised by the Knowledge Centre on Organic Rankine Cycle Technology – KCORC (reference organisation for the dissemination of all information related to ORC technology research, development and education).

The SCARABEUS dissemination event was held on Wednesday, September 6th, parallel to and jointly with the sessions of ORC 2023 and with the following agenda:

Time Content Speaker
8.00 – 8.40 Registration
Session 1 – Introduction and component development. Chair: Noelia Martínez
8.40 – 8.50 Welcome and introduction to SCARABEUS David Sánchez
8.50 – 9.20 Utilisation of Carbon Dioxide mixtures Michele Doninelli
9.20 – 9.50 Turbomachinery for Carbon Dioxide mixtures Andrea Paggini
9.50 – 10.20 Heat exchanger for Carbon Dioxide mixtures Markus Haider
10.20 – 10.50 Coffee break
Session 2 – System development and integration. Chair: Markus Haider
10.50 – 11.20 Techno-economic and environmental features of CSP plants using Carbon Dioxide Mixtures Francesco Crespi
11.20 – 12.00 Experimental activities in SCARABEUS Viktoria Illyes
12.00 – 12.30 Exploitation and next steps (panel) All speakers
12.30 – 12.55 Q&A
13.00 – 14.20 Lunch
Session 3 – Keynote. Co-organised with ORC 2023
14.20 – 15.00 Market report on organic Rankine cycle power systems – 2023 insights Christoph Weiland

Marco Astolfi
Session 4 – Supercritical Carbon Dioxide technology moving forward. Chair: Noelia Martínez
15.00 – 15.20 Enabling cost-effective energy storage – HYBRIDplus Cristina Prieto
15.20 – 15.40 Enabling very high temperatures in CSP applications Salvatore Guccione
15.40 – 15.55 Q&A – Exploitation pathway for sCO2 technology
15.55 – 16.00 Closure David Sánchez

Salvatore Guccione (Royal Institute of Technology KTH, Stockholkm), invited speaker at the event

The event was well attended and the opportunity to cross sessions with ORC 2023 was very much appreciated by the attendees. The representatives of the SARABEUS partners disclosed the activities carried out in each work package during the morning sessions. In the afternoon, the invited speakers -Dr. Cristina Prieto and Salvatore Guccione- provided the attendees with very new information about recently awarded EU projects that will enable the further maturation and exploitation of the SCARABEUS technology.

 

If you should wish to receive the presentations delivered by the speakers, get in contact with the Dissemination Coordinator of SCARABEUS: Prof. David Sánchez (ds@us.es)

The fifth episode of the webinar series on R& Activities on sCO2 in Europe organized by ETN will take place on September 28th

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As already published on this website, the CO2OLHEAT Project coordinated by ETN Global aims to demonstrate (at TRL7) the operation of a 2 MW Waste-Heat-to-power (WH2P) skid based on a 2MW-sCO2 cycle, able to efficiently valorize local waste heat at a significant temperature of 400°C in the CEMEX cement manufacturing plant in Prachovice (CZ).

 

ETN Global initiated, in September 2022, a series of webinars aimed at providing a forum where the R&D activities in the area of supercritical Carbon Dioxide technologies can be disseminated and made known to a wider audience. This initiative has been joined by nine international and national projects, funded by the Horizon 2020 and Horizon Europe programmes of the European Commission (CO2OLHEAT, COMPASsCO2, SCARABEUS, DESOLINATION, SOLARSCO2OL, sCO2-4-NPP , ISOP) and by national R&D programmes in Germany (CARBOSOLA) and the Czech Republic (sCO2-Efekt).

 

The first webinar, held on September 22nd, aimed to introduce these projects in a single session, providing the main features of the project from technical and administrative standpoints. Opportunities for collaboration between projects and with stakeholders were also highlighted. Presentations can be downloaded from the SCARABEUS website: Link.

 

The second webinar took place on December 5th and presented a focus session discussing the fundamental and technical challenges posed for the design and operation of compressors in Supercritical Carbon Dioxide power systems. Three outstanding speakers covered these aspects; the session turned out very well and the feedback was very positive. Presentations can be downloaded from the SCARABEUS website: Link.

 

The fourth event was organised on June 12th, 14.00 – 15.30 CET, focused on heat exchanger technology, since heat exchangers are core equipment of sCO2 systems with an expectedly strong impact on Capital Costs and performance. Presentations can be downloaded from the SCARABEUS website: Link

 

This next event (5h in the series) will be held on September 28th , 14.00 – 15.00 CET, and will be focused on supercritical Carbon Dioxide expanders, which incorporate aspects of the past webinars such as aerodynamic design, turbomachinery seals, materials, etc. The lineup of presentations is as follows:

  • Which boundary conditions for CO2turbines?, Alberto Traverso (University of Genoa
  • Expander stage of an sCO2Companderfor 2 MW output power, Markus Sauerborn (Atlas Copco)
  • Benefits and design challenges of axial sCO2turbines, Stefan Glos (Siemens Energy)
  • Baker Hughes Design Experience with unfired Expanders, Andrea Paggini (Baker Hughes)

 

Download the complete agenda of the event from this link

 

Do not miss the opportunity to register here and book your seat for yet another very interesting event: Link

 

 

Final dissemination event organized by SCARABEUS

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As the SCARABEUS project is reaching to an end, it is time to organise the final dissemination event in the form of an international conference. To this end, SCARABEUS has agreed to co-locate this event with the 7th International Seminar on Organic Rankine Cycle (ORC) Power Systems, held in Seville between September 4th and 6th.

The International Seminar on ORC Power Systems is organised biennially by the Knowledge Centre on Organic Rankine Cycle Technology – KCORC, the reference organisation for the dissemination of all information related to ORC technology research, development and education. KORC promotes the interdisciplinary knowledge exchange between dedicated international professionals from academia, industry, governmental agencies and policy makers, with the aim is to advance the research, development and implementation of ORC technology by means of providing relevant technical and scientific information, organizing technical conferences and workshops, fostering engineering education, and advising on proper regulation. The seventh edition of the conference is hosted by University of Seville, an SCARABEUS partner.

The SCARABEUS dissemination event will be held on Wednesday, September 7th, parallel to and jointly with the sessions of ORC 2023. This will facilitate exposure to a large number of stakeholders from different backgrounds, hence ensuring maximum outreach of the results. The event is comprised of technical presentations disclosing the main results obtained throughout the project in all the relevant scientific and technical areas as well as high-level presentations of related projects funded by the European Commission which can take exploit synergies with SCARABEUS.

 

 

The event is sponsored by the European Commission and, hence, the registration fee is kept to a minimum, also giving access to the technical and keynote sessions of ORC 2023. More information about the event and how to register can be found on the conference website: Link

Do not miss this opportunity to interact with the consortium and get to know all the outcomes of the project!

Paper on aerodynamic and mechanical design of large gas turbines presented by City, University of London and Baker-Hughes at ASME Turbo Expo, Boston (USA)

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Turbine assembly cross section (©Baker Hughes Company, All Rights Reserved)

 

The results of the collaboration between City, University of London (United Kingdom) and Baker-Hughes (Italy) have been have presented at ASME Turbo Expo in Boston (USA). This joint research has taken place within Work Package 3 – Turbomachinery Design of SCARABEUS, aimed at developing turbine designs able to attain high efficiency when working with Carbon Dioxide mixtures at very high pressures and temperatures.

Turbine design is strongly influenced by the composition of the working fluid because of the impact of this feature on the operating conditions of the cycle that attain peak thermal efficiency, and also the impact of composition on fluid characteristics.

 

Flow field of three different designs of the exhaust section

The paper presents the results of the unsteady simulations of the last turbine stage and exhaust section to assess unsteady loads on the rotor, as well as aerodynamic losses in the diffuser and exhaust section. Rotordynamics are also studied.

The paper can be downloaded free of charge from the conference website (link). Check the abstract below:

In this paper, the design of a large-scale axial turbine operating with supercritical carbon dioxide (sCO2) blended with sulfur dioxide (SO2) is presented considering aerodynamic and mechanical design aspects as well as the integration of the whole turbine assembly. The turbine is 130 MW, designed for a 100 MWe concentrated-solar power plant with turbine inlet conditions of 239.1 bar and 700 °C, total-to-static pressure ratio of 2.94 and mass-flow rate of 822 kg/s. The aerodynamic flow path, obtained in a previous study, is first summarised before the aerodynamic performance is evaluated using both steady-state and unsteady 3D numerical models to simulate the aerodynamic performance of the turbine. Whole-annulus unsteady simulations are performed for the last turbine stage and the exhaust section to assess the unsteady loads on the rotor due to downstream pressure field distortion and to assess aerodynamic losses of the diffuser and exhaust section. The potential low engine order excitation on the last rotor stage natural frequency modes due to downstream pressure distortion is assessed. The design of the turbine assembly is constrained by current manufacturing capabilities and the proposed working fluid properties. High-level flow-path design parameters, such as pitch diameter and number of stages, are established considering a trade-off between weight and footprint, turbine efficiency and rotordynamics. Rotordynamic stability is assessed considering the high fluid density related to cross coupling effects. Finally, shaft end sizing, cooling system design and the integration of dry gas seals are discussed.

Paper on energy losses in radial turbines presented by City, University of London at ASME Turbo Expo, Boston (USA)

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Fan power consumption at reduced mass flow rate for different ACC designs

 

The researchers at City, University of London have presented their work assessing the different contributions to energy losses experienced by radial turbines working with Carbon Dioxide mixtures in supercritical power cycles. This research work also considers the effect of turbine scale on the breakdown of energy losses, assessing this for turbines in cycles rated at 0.1 MWe, 1 MWe and 10 MWe. The work makes use of meanline design codes and CFD analysis to assess the impact of fluid composition and scale and to compare the data obtained against data from literature.

Meridional profile of radial inflow turbines working with different Carbon Dioxide mixtures and with different scales (plots are not to scale)

The paper can be downloaded free of charge from the conference website (link). Check the abstract below:

Recent studies have indicated the potential of CO2-mixtures to lower the cost of concentrated solar power plants. Based on aerodynamic and cost considerations, radial inflow turbines (RIT) can be a suitable choice for small to medium sized sCO2 power plants (about 100 kW to 10 MW). The aim of this paper is to quantify the effect of doping CO2 on the design of RITs. This is achieved by comparing the 1D mean-line designs and aerodynamic losses of pure sCO2 RITs with those of three sCO2 mixtures containing tetrachloride (TiCl4), sulphur dioxide (SO2), and hexaflourobenzene (C6F6).

Results show that the optimal turbine designs for all working fluids will have similar rotor shapes and velocity diagrams. However, factors such as the clearance-to-blade-height ratio, turbine pressure ratio, and the difference in the viscosity of the fluids cause variations in the achievable turbine efficiency. Once the effects of these factors are eliminated, differences in the total-to-static efficiency amongst the fluids may become less than 0.1%. Moreover, if rotational speed limits are imposed, then greater differences in the designs and efficiencies of the turbines emerge amongst the fluids. It was found that limiting the rotational speed reduces the total-to-static efficiency in all fluids; the maximum reduction is about 15% in 0.1 MW CO2 compared to the 3% reduction in CO2/TiCl4 turbines of the same power.

Among the mixtures studied, CO2/TiCl4 achieved the highest performance, followed by CO2/C6F6, and then CO2/SO2. For example, 100 kW turbines for CO2/TiCl4, CO2/C6F6, CO2/SO2, and CO2 achieve total-to-static efficiencies of 80.0%, 77.4%, 78.1%, and 75.5% respectively. Whereas, the efficiencies for 10 MW turbines are 87.8%, 87.3%, 87.5%, and 87.2%, in the same order. differences in the designs and efficiencies of the turbines emerge

 

Paper on off-design operation of ACCs presented by University of Seville at ASME Turbo Expo, Boston (USA)

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Fan power consumption at reduced mass flow rate for different ACC designs

 

The researchers at University of Seville have presented their work assessing the part-load operation of supercritical power cycles running on Carbon Dioxide mixtures. As a continuation of the work presented at the 5th European Conference on Supercritical Carbon Dioxide Energy Systems, where the methodology to design ACCs for supercritical CO2 power cycles developed at University of Seville was presented, this paper explores the operation of the cycle when running in off-design. Emphasis is placed on the operation of the ACC because of the strong impact that a wrong operation of this component has on overall cycle performance.

The paper can be downloaded free of charge from the conference website (link). Check the abstract below:

This manuscript, developed in the framework of SCARABEUS project, presents an assessment of the part-load performance of a transcritical Recompression cycle running on a 80%CO2-20%SO2 mixture under different load-control schemes.

The first part of the paper describes the computational platform of the integrated system, implemented in Thermoflex but with profuse use of in-house scripts, in order to accurately describe the off-design performance of key components when operating on CO2 mixtures with non-ideal gas behaviour. These off-design models make use of performance maps for turbomachinery — provided by the SCARABEUS partners — whereas the Conductance Ratio Method employed to model the counter-current heat exchangers is calibrated with in-house tools. The paper is specifically focused on the Heat Rejection Unit, for which a specific design tool accounting for accurate heat transfer between working fluid and cooling medium (air) and for auxiliary power consumption — both in off-design — has been developed by the authors.

In the second part of the paper, different operating strategies of the power cycle are considered, based on keeping one of the following three parameters constant: turbine inlet temperature, turbine outlet temperature or return temperature of molten salts. Globally, plant operation is constrained by the need to keep the temperature of cold HTF returning to the storage system as close as possible to its rated (design) value and by the need to keep turbine outlet temperature below 450°C to avoid the installation of an external cooling system in the low pressure section of this equipment. Therefore, the trade-off between these two parameters and system net efficiency are assessed in the paper. Regarding the Air-Cooled Condenser, the optimal operation strategy of this component found to be based on a combination of Single-speed and Variable Frequency Driver fans.

The results show that the operation at constant turbine inlet temperature leads to the highest net efficiency of the power block, closely followed by the control scheme based on constant return temperature of the heat transfer fluid. Nevertheless, this latter option enables a perfect control on the other two figures of merit. As a consequence, the identification of the best operation strategy must be addressed in future works by means of a thorough techno-economic assessment considering the annual yield of the plant.

Paper on axial turbine flowpath design presented by City, University of London at ASME Turbo Expo, Boston (USA)

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Turbine flowpath for a 100 MWe SCARABEUS plant running on mixtures of Carbon Dioxide and Hexafluorobenzene

 

The researchers at City, University of London have presented their work on the design of the flowpath of large axial turbines for integration into supercritical power cycles operating with Carbon Dioxide mixtures. This research is framed in Work Package 3 – Turbomachinery Design of the project.

The composition of the working fluid has a strong influence on turbine design, as a consequence of two effects. The first one is the impact of working fluid composition on the operating conditions of the cycle that attain peak thermal efficiency. The second one is the impact on the characteristics of the working fluid that are relevant to turbine design. Meanline design codes and CFD tools are combined to assess these effects and to produce optimum flowpath designs.

Impact of loading and flow coefficient on total-to-total efficiency of the turbine

The paper can be downloaded free of charge from the conference website (link). Check the abstract below:

Supercritical CO2 (sCO2) mixtures have been found to be promising for enhancing the performance of power cycles for concentrated solar power (CSP) applications, with up to a 6% enhancement in cycle efficiency compared to a simple recuperated CO2 cycle depending upon the mixture and cycle configuration chosen. Given that turbine efficiency significantly affects the overall plant performance, it is important to confirm whether turbines operating with CO2 mixtures can achieve the same efficiencies compared to pure CO2, whilst exploring whether the use of mixtures introduces any differences in the turbine design. This study aims to investigate the differences in turbine flow path designs produced for pure CO2 compared to CO2 mixtures, whilst taking into account aerodynamic, rotordynamic and mechanical design aspects, as assessed during the mean-line design process. The aim of this study extends to evaluating the effect of key turbine design variables, such as the loading coefficient, flow coefficient and degree of reaction, on the flow path design and overall aerodynamic performance. Multiple flow path designs have been produced for axial turbines operating with pure CO2 and mixtures of CO2 with titanium tetrachloride (TiCL4), hexafluorobenzene (C6F6) and sulphur dioxide (SO2) for installation in a 100 MWe CSP plant. It is found that turbines operating with either pure CO2 or CO2 mixtures result in overall total-to-total efficiencies in excess of 92.5%; where the highest turbine efficiency is achieved for the turbine operating with pure CO2, whilst this reduces by a maximum of 1.1 percentage points for the CO2/TiCL4 mixture. This reduction in efficiency is because the CO2/TiCL4 turbine is limited to a maximum of six design stages in order to meet the imposed mechanical design criteria, whilst the pure CO2 turbine can accommodate thirteen stages leading to higher aerodynamic efficiency. The difference between the two cases is the result of a higher mass-flow rate for the CO2/TiCL4 mixture (66% greater than for pure CO2), which results in high rotor bending stresses and limits the number of stages to comply with the design criteria. It is also found that designing the turbine at loading and flow coefficients of 0.8 and 0.6 respectively, whilst fixing the degree of reaction and pitch-to-chord ratio to values of 0.5 and 0.85 respectively, resulted in an efficiency enhancement of 0.2% with respect to a baseline design produced at loading and flow coefficients of 1.0 and 0.5. This increase is due to being able to increase the number of stages from eleven to fifteen. This indicates that there is not much benefit in modifying key design parameters to improve the turbine efficiency as the 0.2% efficiency enhancement is considered within the margin of accuracy of mean-line flow path design.

Very active participation of the SCARABEUS consortium at ASME Turbo Expo in Boston

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Turbo Expo is the flagship conference in the field of turbomachinery for power generation and aircraft and marine propulsion. The conference gathers ~2500 professionals annually, who meet to share the latest development of the scientific and industrial communities through technical, panel and tutorial sessions as well as keynote talks. The conference is organized by the International Gas Turbine Institute of the American Society of Mechanical Engineers.

Turbo Expo has been one of the preferred venues to disseminate the outcomes of the SCARABEUS project, as communicated in previous years on this website, and this year has not been different.

In the first day of this year’s conference, held at the Hynes Convention centre in Boston (MA), Prof. David Sánchez organised a panel session to introduce the “Supercritical CO2 Projects in the International Community”. Seven projects funded by the Horizon 2020 and Horizon Europe programmes of the European Commission were presented in this session, followed by a very interesting panel discussion. The SCARABEUS project broke the ice, setting the stage for the other projects to complete the landscape of supercritical Carbon Dioxide research in Europe. The kind support of Eric Clementoni (Bechtel Marine Propulsion Corporation), stepping forward as improvised Co-Chair of the session due to the absence of Dr. Jason Wilkes (Southwest Research Institute) is gratefully acknowledge.

 

 

Intro slide and session schedule of panel on international Supercritical Carbon Dioxide projects

 

 

Panellists of session 31-31 (from left): Rafael Guédez (KTH), Silvia Trevisan (KTH), Lorenzo Arcangeli (Baker Hughes), Alberto Traverso (University of Genoa), Renaud Le Pierres (Meggitt), David Sánchez (University of Seville)

 

The main outcomes of the SCARABEUS project were also presented at another panel session, “Supercritical CO2 Research & Development”, organised by Renaud Le Pierres (Meggitt, UK), where Prof. David Sánchez (Dissemination Coordinator of the SCARABEUS project) shared the stage with distinguished speakers from Europe and North America: Vittorio Michelasi (Baker Hughes, Italy), Nathan Weiland (National Energy Technology Laboratory, USA), Aaron McClung (Southwest Research Institute, USA), Ty Neises (National Renewable Energy Laboratory). With respect to the session above, this session had a much wider scope, not only discussing today research efforts but also looking into the foreseen needs of the energy market in the future and how supercritical Carbon Dioxide technologies can possibly fulfil them.

In addition to these panel sessions, a number of technical papers were presented at ASME Turbo Expo by the SCARABEUS partners. The team at University of Seville presented a very interesting paper discussing how to optimise the design and operation of Air-Cooled Condensers to enhance part load performance with minimum impact on Capital Costs:

  • Rodríguez-de Arriba, F. Crespi, D. Sánchez, L. García-Rodríguez, 2023, Assessment of Part-load Operating Strategies of Supercritical Power Cycles Using Carbon Dioxide Mixtures in CSP Plants, Including Air-Cooled Condenser Optimisation (GT2023-103665), Presented at Turbo Expo, June 26-30, Boston (MA).

The team at City, University of London presented their latest research on the development of axial turbines for Carbon Dioxide mixtures. In this paper, the authors compared the impact of adding certain dopants on the flow path of large axial turbines working with Carbon Dioxide and supercritical inlet conditions:

  • I. Salah, M. T. White, A. I. Sayma, 2023, A Comparison of Flow Path Designs for Axial Turbines Operating with Pure CO2 and CO2 Mixtures, Presented at Turbo Expo, June 26-30, Boston (MA).

These technical papers are currently being processed by the editorial services of ASME and will be made available in Open Access in the next months. Keep an eye on the online digital collection and on this website for further information.