Direct steam generation collectors are considered with the aim to improve the performance of a parabolic trough collector leading to a reduction of operating costs of solar electric generation systems. In this study a hydrodynamic steady state model is developed and linked with a thermal model to optimize the performance of once-through direct steam generation solar collectors. The hydrodynamic model includes flow pattern classification and a pressure drop model. Flow pattern maps for typical DSG collectors with horizontal and inclined absorber tubes are generated to investigate the variation of flow conditions with radiation level, tube diameter, tube length and flow rate. Two-phase flow frictional pressure drop correlations for the range of operating conditions in a DSG collector are selected from the wide range of published correlations by comparison with experimental data for typical steam-water flow conditions in a DSG collector. Pressure drop is calculated for different operating conditions for both horizontal and inclined solar absorber tubes. Alternative operational strategies are evaluated to achieve optimum performance of a direct steam generation collector at different radiation levels. [S0199-6231(00)00101-5]
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February 2000
Technical Papers
Hydrodynamic Analysis of Direct Steam Generation Solar Collectors
S. D. Odeh,
S. D. Odeh
School of Mechanical and Manufacturing Engineering, The University of New South Wales, Sydney, Australia 2052
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M. Behnia,
M. Behnia
School of Mechanical and Manufacturing Engineering, The University of New South Wales, Sydney, Australia 2052
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G. L. Morrison
G. L. Morrison
School of Mechanical and Manufacturing Engineering, The University of New South Wales, Sydney, Australia 2052
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S. D. Odeh
School of Mechanical and Manufacturing Engineering, The University of New South Wales, Sydney, Australia 2052
M. Behnia
School of Mechanical and Manufacturing Engineering, The University of New South Wales, Sydney, Australia 2052
G. L. Morrison
School of Mechanical and Manufacturing Engineering, The University of New South Wales, Sydney, Australia 2052
Contributed by the Solar Energy Division of The American Society of Mechanical Engineers for publication in the ASME JOURNAL OF SOLAR ENERGY ENGINEERING. Manuscript received by the ASME Solar Energy Division, June 1998; final revision, Nov. 1999. Associate Technical Editor: R. Hogan.
J. Sol. Energy Eng. Feb 2000, 122(1): 14-22 (9 pages)
Published Online: November 1, 1999
Article history
Received:
June 1, 1998
Revised:
November 1, 1999
Citation
Odeh , S. D., Behnia , M., and Morrison, G. L. (November 1, 1999). "Hydrodynamic Analysis of Direct Steam Generation Solar Collectors ." ASME. J. Sol. Energy Eng. February 2000; 122(1): 14–22. https://doi.org/10.1115/1.556273
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