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TECHNICAL PAPERS

DSG Under Two-Phase and Stratified Flow in a Steel Receiver of a Parabolic Trough Collector

[+] Author and Article Information
Rafael Almanza, Gustavo Jiménez, Alvaro Lentz

Instituto de Ingenierı́a, Universidad Nacional Autónoma de México, Ciudad Universitaria, Coyoacán, D.F. 04510, Mexico

Alberto Valdés, Alberto Soria

Universidad Autónoma Metropolitana, Av. Michoacán y la Purı́sima, Iztapalapa D.F. 09340, Mexico

J. Sol. Energy Eng 124(2), 140-144 (Apr 24, 2002) (5 pages) doi:10.1115/1.1463734 History: Received February 01, 2000; Revised May 01, 2001; Online April 24, 2002
Copyright © 2002 by ASME
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References

Pederson, R. J., and May, E. K., 1982, “Flow Instability during Direct Steam Generation in a Line-Focus Solar Collector System.” Technical Report SERI/ TR-632-1354, National Renewable Energy Laboratory (NREL), Golden, CO.
Murphy, L. M., and May, E. K., 1982, “Steam Generation in Line-Focus Solar Collectors: A Comparative Assessment of Thermal Performance, Operating Stability, and Cost Issues.” Technical Report, SERI/TR-632-1311, Solar Energy Research Institute (NREL), Golden, CO.
Griffth P., 1973, “Two Phase-Flow,” Handbook of Heat Transfer, W. M. Ronsenow and J. P. Hartnett (Eds.), Chap. 14, pp. 14-1–14-21, McGraw-Hill.
Zarza, E., Ajona, J. I., and Hennecke, K., 1997, “Development of a New Generation of Solar Thermal Power Stations,” Solar Thermal Concentrating Technologies, M. Becker and M. Böhmer, (eds.), Proc. of 8th Int. Symp., Vol. 2, pp. 397–415, C.F. Müller Verlag, Heidelberg, Germany.
Goebel, O., and Hennecke, K., 1997, “Investigation of Thermohydraulic in Parabolic Trough Absorber Tube with Direct Steam Generation (DSG).” Solar Thermal Concentrating Technologies, M. Becker and M. Böhmer (Eds.), Proc. of 8th Int. Symp., Vol. 2, pp. 787–813, C.F. Müller Verlag, Heidelberg, Germany.
Goebel, O., 1997, “Modelling of Two Phase Stratified and Annular Flow in Heated Horizontal Tubes.” Proc. of Int. Engineering Foundation 3rd Conf., Irsee, Germany, pp. 303–310, Taylor and Francis.
Hahne, E., Herrmann, U., and Rheinländer, J., 1997, “The Effect of Tilt on Flow Patterns of Water/Steam Flow Through Heated Tubes,” Experimental Heat Transfer, Fluid Mechanics, and Thermodynamics, Edizioni ETS, pp. 925–934.
Almanza,  R., Lentz,  A., and Jiménez,  G., 1997, “Receiver Behavior in Direct Steam Generation with Parabolic Troughs.” Sol. Energy, 61(4), pp. 275–278.
Almanza,  R., and Lentz,  A., 1998, “Electricity Production at Low Powers by Direct Steam Generation with Parabolic Troughs,” Sol. Energy, 64(1-3), pp. 115–120.
ASHRAE Handbook, 1993, pp. 34.3, Equipment, USA.
Valdés, A., Almanza, R., Soria, A., and Mazari, M., 1998, “Mathematical Model for Direct Steam Generation in Parabolic Trough Collectors with Compound-Wall Receiver,” Proc. of 1998 Annual Conf., American Solar Energy Society, pp. 271–275.
Almanza, R, Valdés, A., and López, S., 1982, “Solar Concentrators,” NTIS, PB-82-157553.
Valdés, A., 1988, “Stochastic Model of the Solar Beam Irradiance Focused in a Parabolic Trough,” Proc. of XII Mexican Solar Energy Society (ANES), pp. 63–66 (in Spanish).
Martinez,  I., Almanza,  R., Mazari,  M., and Correa,  G., 2000, “Parabolic Trough Reflector Manufactured with Aluminum First Surface Mirrors Thermally Sagged,” Sol. Energy Mater. Sol. Cells, 64(1), pp. 85–96.
Almanza,  R., Lentz,  A., Santiago,  L., and Valdés,  A., 1999, “Some Experiences on Electricity Production at Low Powers with DSG Using Parabolic Troughs,” J. Phys. IV, 9, pp. 229–232 (9th SolarPACES Int. Symp. on Solar Thermal Concentrating Technologies, France).
Flores, V., 2001, Bimetallic Receiver to Produce Direct Steam Generation in Parabolic Troughs, Ph.D. dissertation in process at National University of Mexico (private communication).

Figures

Grahic Jump Location
Arrangement of the thermocouples on the absorber pipe
Grahic Jump Location
Deflection of the steel pipe on the first section. Wall temperature on the lower and upper sides of the absorber
Grahic Jump Location
Deflection of the steel pipe on the last section. Wall temperature on the lower and upper sides of the absorber
Grahic Jump Location
Node distribution representing the position along the receiver curvature
Grahic Jump Location
Polar diagram representing the solar beam irradiance on the receiver. Concentric circles are the fraction of concentrated radiation around a node.
Grahic Jump Location
Predicted wall circumferential temperature profiles on a steel receiver under non-homogeneous irradiance distribution. Node 1 corresponds to the top of the pipe. The solid curve is related to the flow of air, while the broken one is related to the arriving liquid water on an open channel sense.

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