Solar chimney power plant : a holistic approach to the improvement of the flow within the transition section / von Markus Günter Herbst (geb. Tschersich) aus Mülheim an der Ruhr. Wuppertal, April 2018
Inhalt
- Motivation
- I Fundamentals
- Structural Aspects of a Solar Chimney Power Plant
- Solar Collector
- Ground - Properties and (Pre-)Treatment
- Turbines and Housing
- Transition Section
- Solar Chimney
- Basics of Fluid Mechanics
- Solar Collector Flow
- Influence of Turbulence on Solar Collector Flow Field
- Flow Field on Top of the Solar Collector Roof
- Wind Fence at the Outer Rim of the Solar Collector
- Flow Losses
- Turbine Properties
- Axial-Flow vs. Wind Turbine
- Pressure Drop and Efficiency
- Actuator Disc Method (ADM)
- Pressure Jump Method (PJM)
- Flow Losses
- Transition Section
- Resistance Coefficient of Diffusers
- Resistance Coefficient of Curved Segments and Mixing of Flow Streams
- Solar Chimney Tube Flow
- Free Jet Flow
- Basics of Thermodynamic
- Thermodynamic Aspects Between the Solar Collector and Soil Surface
- Glass and Supporting Structure
- Soil Characteristics
- Heat Transfer at the Components of the Solar Collector
- Temperature Boundary Layer
- Turbines
- Transition Section
- Solar Chimney Tube Flow
- Ways of Heat Transfer
- Computational Fluid Dynamics (CFD)
- Model Parameter
- Modelling Parameter
- Navier-Stokes Equations
- Large Eddy Simulation (LES)
- Reynolds-Averaged Navier-Stokes (RANS)
- Turbulence Modelling (k-, k-)
- Radiation Model (S2S)
- Shell Conduction Model
- Computational Grid Parameter
- Solving Parameter
- Verification and Validation
- Best Practise Guideline
- Errors and Uncertainties
- II Pre-Investigation (Analytical - Experimental - Numerical)
- Mathematical 1D-Model of a Solar Chimney Power Plant at Fullscale
- Intention
- Excel Solver
- Input Parameter
- Verification and Validation
- Influence of Partitions of Solar Collector and Solar Chimney
- Base Load of a Solar Chimney Power Plant
- Physical Influence Parameters on Energy Output
- Relative Humidity (RH)
- Wind Pressure at Outer Rim of Solar Collector
- Fresh Water Production
- Altitude
- Soil Parameters (Soil Heat Flux, Temperature)
- Albedo
- Minimal Temperature of Soil Underneath the Solar Collector
- Results
- Influence of Relative Humidity
- Solar Collector Partitions
- Solar Chimney Partitions
- Soil Heat Flux
- Minimal Soil Temperature
- Conclusion
- Wind Tunnel Studies at Stellenbosch, South Africa
- CFD Analysis of the Wind Tunnel Model from Stellenbosch
- Stationary 3D-CFD Model of the Prototype in Manzanares, Spain
- Set-Up of the Numerical Model
- Model With Cone in the Transition Section
- Grid Independence Test
- Results
- Reference (A)
- Without Installation and Without Radiation Model (B)
- Without Installation and Without Shell Conduction Model (C)
- Model With Installation (D)
- Conclusion
- Structural Model with Finite Elements
- III Improved Solar Chimney Power Plant Model
- Wind Tunnel Studies at Bochum, Germany
- Experimental Set-Up
- Redirecting Variants for the Transition Section
- Extension of Turbine Opening
- Local Redirection
- Global Redirection
- Windbreaker
- Combination
- Designed Variants
- Asymmetric Inflow Conditions
- Measuring Devices
- Results
- Conclusion
- 3D-CFD Analysis of the Wind Tunnel Model
- IV Final Remarks
- V Appendices
- Former Research on the Solar Chimney Power Plant
- Wind Tunnel Studies at Stellenbosch, South Africa
- Wind Tunnel at Stellenbosch, SA
- Wind Tunnel Models I and II
- Measurement Equipment
- Calibration Data
- Details of Measuring Equipment
- Preliminary Tests
- Results
- CFD Analysis of the Wind Tunnel Model from Stellenbosch
- Stationary 3D-CFD Model of the Prototype of Manzanares, Spain
- Derivation of Hyperbola Equation
- Wind Tunnel Studies at Bochum, Germany
- Fan Flow Simulation and Turbine Influence Modelling
- Intention
- High-Speed Camera Testing
- Basics of Axial Turbines
- Blade Element Momentum Theory (BEM)
- Turbine Layout
- Inflow and Outflow Condition
- Conclusion
- Design and Construction of a Solar Chimney Power Plant for Aswan, Egypt