University R&D Panel Session -...
Transcript of University R&D Panel Session -...
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University R&D Panel Session
5th Supercritical CO2 Power Cycle Symposium, San Antonio, Texas
David SánchezAssociate Professor at the Thermal Power Group
Department of Energy EngineeringUniversity of Seville, Spain
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Table of contents0
1. Contribution of the University in Supercritical CO2 Technology Research• Features of sCO2 R&D
• Where/how can Universities contribute to developing sCO2 technology
2. University of Seville – Activities in sCO2
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The Role of Universities1
Some features of sCO2 technology R&D:
Component development: very high pressures needed to achieve dense gas effect
New fluid and flow conditions: lack of experimental data to validate design/analysis models:
Heat exchangers:
Nu correlations: do they fit our case??? Expected error (figure below)???
Turbomachinery (aerodynamics): Cannot rely on existing experimental data for air/gas turbomachinery (wind tunnels)
Very few test loops for overall performance (not aerodynamic) testing
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The Role of Universities1
Some features of sCO2 technology R&D:
Component development: very high pressures needed to achieve dense gas effect
New fluid and flow conditions: lack of experimental data to validate design/analysis models:
CapEx and OpEx intensive
Large investments required
Few active research groups at Universities…
…and mainly on system/component modelling
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The Role of Universities1
Where/How can Universities contribute to the development of sCO2 power cycle technology?
1. Fundamentals: “Organise” the thermodynamic principles of the sCO2 power cycle Standardisation2. Thermodynamics: improve modelling tools to enable accurate performance models3. Turbomachinery: systematic experimental work production of a large, dedicated database on aerodynamic performance
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Activities at USE2
Fundamentals and performance modelling:
Organising the fundamentals of the sCO2 cycle, in parallel to Rankine/Brayton systems Standardisation of existing proposals Hybridisation schemes for different collector technology (temperature level)
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Activities at USE2
Turbomachinery
1. Fundamentals: performance of conical diffusers differences observed2. 1D/3D design models for radial machinery good experimental fit
Heat exchangers
1. Detailed design codes to evaluate HX design on cycle performance from thermodynamics to specs2. Reduced order models: Off-design performance modelling for HXs with unknown geometry (Paper #013)
6 8 10 12 14 16 18 20
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L/D
AR
Cp for Bth = 3% ; Mth = 0.2 ; Reth = 7.4·106 ; Tuth = 1% ; lth/δ th = 10 ; Zth = 0.3
2θ = 10º
2θ = 9º
2θ = 8º
2θ = 7º 2θ = 6º 2θ = 5º 2θ = 4º
0.680.72
0.76 0.8 0.820.84
0.86
0.880.78
0.76
0.74
0.720.70
Bth = 3 % ; Mth = 0.2 ; Reth = 1.2·105
Air +
S-CO2 +3D-CFD Results1D Results
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University R&D Panel Session
5th Supercritical CO2 Power Cycle Symposium, San Antonio, Texas
David SánchezAssociate Professor at the Thermal Power Group
Department of Energy EngineeringUniversity of Seville, Spain