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W. Spirkl
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Journal Articles

A Modified Temperature-Jump Method for the Transition and Low-Pressure Regime

T. Beikircher, N. Benz, W. Spirkl
Journal: ASME Journal of Heat and Mass Transfer
Publisher: ASME
Article Type: Research Papers
J. Heat Mass Transfer. November 1998, 120(4): 965–970.
https://doi.org/10.1115/1.2825916
Published Online: November 1, 1998
View Article titled, A Modified Temperature-Jump Method for the Transition and Low-Pressure Regime
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Topics: Heat conduction, Pressure, Temperature, Interpolation, Cryogenics, Cylinders, Flow (Dynamics), High pressure (Physics), Knudsen number, Modeling
Journal Articles

Performance Limits of Heliostat Fields

A. Kribus, V. Krupkin, A. Yogev, W. Spirkl
Journal: Journal of Solar Energy Engineering
Publisher: ASME
Article Type: Research Papers
J. Sol. Energy Eng. November 1998, 120(4): 240–246.
https://doi.org/10.1115/1.2888126
Published Online: November 1, 1998
View Article titled, Performance Limits of Heliostat Fields
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Topics: Design, High temperature, Optics, Ray tracing, Reflectance, Reflection, Solar energy
Journal Articles

On the Stability of Solar Chemical Particle Receivers

H. Ries, H. R. Tschudi, W. Spirkl
Journal: Journal of Solar Energy Engineering
Publisher: ASME
Article Type: Research Papers
J. Sol. Energy Eng. May 1998, 120(2): 96–100.
https://doi.org/10.1115/1.2888061
Published Online: May 1, 1998
View Article titled, On the Stability of Solar Chemical Particle Receivers
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Topics: Particulate matter, Solar chemistry, Stability, Solar energy, Feedback, Inflow
Journal Articles

Performance of Surface and Volumetric Solar Thermal Absorbers

W. Spirkl, H. Ries, A. Kribus
Journal: Journal of Solar Energy Engineering
Publisher: ASME
Article Type: Research Papers
J. Sol. Energy Eng. May 1997, 119(2): 152–155.
https://doi.org/10.1115/1.2887895
Published Online: May 1, 1997
View Article titled, Performance of Surface and Volumetric Solar Thermal Absorbers
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Topics: Approximation, Emissions, Flow (Dynamics), Fluid dynamics, Fluids, Heat, Heat transfer, Radiation (Physics), Simulation, Solar energy
Journal Articles

Optimal Parallel Flow in Solar Collectors for Nonuniform Irradiance

W. Spirkl, H. Ries, A. Kribus
Journal: Journal of Solar Energy Engineering
Publisher: ASME
Article Type: Research Papers
J. Sol. Energy Eng. May 1997, 119(2): 156–159.
https://doi.org/10.1115/1.2887896
Published Online: May 1, 1997
View Article titled, Optimal Parallel Flow in Solar Collectors for Nonuniform Irradiance
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Topics: Flow (Dynamics), Solar collectors, Temperature, Fluid dynamics, Fluids
Journal Articles

Inherent Limitations of Volumetric Solar Receivers

A. Kribus, H. Ries, W. Spirkl
Journal: Journal of Solar Energy Engineering
Publisher: ASME
Article Type: Research Papers
J. Sol. Energy Eng. August 1996, 118(3): 151–155.
https://doi.org/10.1115/1.2870891
Published Online: August 1, 1996
View Article titled, Inherent Limitations of Volumetric Solar Receivers
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Topics: Electrical resistivity, Failure, Failure mechanisms, Flow (Dynamics), Heat, Irradiation (Radiation exposure), Materials properties, Pressure control, Solar energy, Temperature
Journal Articles

Analysis of Gas Heat Conduction in Evacuated Tube Solar Collectors

T. Beikircher, W. Spirkl
Journal: Journal of Solar Energy Engineering
Publisher: ASME
Article Type: Research Papers
J. Sol. Energy Eng. August 1996, 118(3): 156–161.
https://doi.org/10.1115/1.2870898
Published Online: August 1, 1996
View Article titled, Analysis of Gas Heat Conduction in Evacuated Tube Solar Collectors
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Topics: Heat conduction, Solar collectors, Interpolation, Pressure, Temperature, Boundary-value problems, Errors, Gases, Heat losses, Momentum
Journal Articles

Gas Heat Conduction in Evacuated Flat-Plate Solar Collectors: Analysis and Reduction

T. Beikircher, N. Benz, W. Spirkl
Journal: Journal of Solar Energy Engineering
Publisher: ASME
Article Type: Research Papers
J. Sol. Energy Eng. August 1995, 117(3): 229–235.
https://doi.org/10.1115/1.2847807
Published Online: August 1, 1995
View Article titled, Gas Heat Conduction in Evacuated Flat-Plate Solar Collectors: Analysis and Reduction
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Topics: Flat plates, Heat conduction, Solar collectors, Pressure, Gases, Geometry, Heat losses, Thermal conductivity
Journal Articles

Dynamic Solar Domestic Hot Water Testing

W. Spirkl
Journal: Journal of Solar Energy Engineering
Publisher: ASME
Article Type: Research Papers
J. Sol. Energy Eng. May 1990, 112(2): 98–101.
https://doi.org/10.1115/1.2929653
Published Online: May 1, 1990
View Article titled, Dynamic Solar Domestic Hot Water Testing
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Topics: Hot water, Solar energy, Testing, Filters, Radiation (Physics), Stress