0
TECHNICAL PAPERS

Continuous Tracking of Heliostats

[+] Author and Article Information
Abraham Kribus

Dept. of Fluid Mechanics and Heat Transfer, Faculty of Engineering, Tel Aviv University, Tel Aviv 69978, Israel

Irina Vishnevetsky, Moshe Meri, Amnon Yogev

Environmental Sciences and Energy Research, Weizmann Institute of Science, Rehovot 76100, Israel

Andrei Sytnik

Falcon Technologies, P.O. Box 57185, Tel Aviv 61571, Israel

J. Sol. Energy Eng 126(3), 842-849 (Jul 19, 2004) (8 pages) doi:10.1115/1.1668026 History: Received May 01, 2003; Online July 19, 2004
Copyright © 2004 by ASME
Your Session has timed out. Please sign back in to continue.

References

Vant-Hull, L. L., Izygon, M., and Imhof, A., 1999, “Optimization of Central Receiver Fields to Interface with Applications Requiring High Flux Density Receivers,” 9 Intl. Symp. Solar Thermal Concentrating Technologies, Journal de Physique IV, Flamant, G., Ferriere, A. and Pharabod, F., Eds., Font-Romeu, France, pp. 65–70.
Buck, R., Bräuning, T., Denk, T., Pfänder, M., Schwarzbözl, P., and Tellez, F., 2001, “Solar Hybrid Gas Turbine Based Power Tower Systems (REFOS),” Solar Engineering 2001, Washington, D.C.
Karni,  J., Kribus,  A., Rubin,  R., Sagie,  D., Doron,  P., and Fiterman,  A., 1997, “The DIAPR: A High-pressure, High-temperature Solar Receiver,” J. Sol. Energy Eng., 119, pp. 74–78.
Levy, I., and Epstein, M., 1998, “Design and Operation of a High-power Secondary Concentrator,” 9th International Symposium on Solar Thermal Concentrating Technologies, Flamant, G., Ferriere, A. and Pharabod, F., Eds., Odeillo, EDP Sciences, pp. 575–580.
Monterreal, G., Garcia, G., Romero, M., and Barrera, G., 1997, “Development and Testing of a 100 m2 Glass-metal Heliostat with a New Local Control System,” Solar Engineering 1997, Washington D.C., pp. 251–259.
Stone, K. W., and Lopez, C. W., 1995, “Evaluation of the Solar One Track Alignment Methodology,” Solar Engineering 1995, Lahaina (Hawaii), 1, pp. 521–526.
Stone, K. W., and Sutherland, J. P., 1997, “Solar Two Heliostat Tracking Performance,” Solar Engineering 1997, Washington, D.C., ASME, pp. 237–242.
Kribus, A., Vishnevetsky, I., and Yogev, A., 2002, “Closed Loop Control of Heliostat Fields,” 11th International Symp. Concentrating Solar Power and Chemical Energy Technologies, Zurich.
Schubnell, M., and Ries, H., 1990, “Velocity Controlled Tracking of the Sun,” Solar Energy Materials 21, pp. 207–212.
Duffie, J. A., and Beckman, W. A., 1991, “Solar Engineering of Thermal Processes,” Wiley, New York.
Ries,  H., Kribus,  A., and Karni,  J., 1995, “Non-isothermal Receivers,” J. Sol. Energy Eng., 117, pp. 259–261.
Kribus, A., Doron, P., Karni, J., Rubin, R., Reuven, R., Taragan, E., and Duchan, S., 2000, “A Multistage Solar Receiver: The Route to High Temperature,” Solar Energy 67, pp. 3–11.
Kribus, A., Huleihil, M., Timinger, A., and Ben-Mair, R., 2000, “Performance of a Rectangular Secondary Concentrator with an Asymmetric Heliostat Field,” Solar Energy 69, pp. 139–151.
Mancini, T., 2000, “Catalog of Solar Heliostats,” IEA SolarPACES Report III-1/00.

Figures

Grahic Jump Location
Heliostat motor speed requirements for continuous tracking: (a) azimuth, (b) elevation.
Grahic Jump Location
(a) Flux distribution and cumulative power on the target. C and P indicate the apertures of the central and peripheral units in a partitioned receiver, respectively. (b) Variation of the intercepted power by each aperture as a function of aiming error: a single large receiver (I), the central unit in a partitioned receiver (II), a peripheral unit in a partitioned receiver when the aim point drifts closer (III), a peripheral unit when the aim point drifts away (IV), the average of two opposite peripheral units (V).
Grahic Jump Location
Modified heliostat motor with an external encoder mounted on the back shaft.
Grahic Jump Location
Target and test platform: (a) side view, (b) front view of the target.
Grahic Jump Location
(a) Variation of elevation and azimuth angles of the heliostat during continuous and step tracking. (b) Drift of the heliostat angles from the exact aiming.
Grahic Jump Location
Variation of the radiometer measurements during periods of continuous and step tracking: (a) individual radiometers, (b) imbalance.
Grahic Jump Location
Relative power collected by calorimeter. Vertical lines: beginning and end of step tracking.
Grahic Jump Location
Variation of flux measured by the radiometers as a function of (a) elevation error, (b) azimuth error.
Grahic Jump Location
Spectra of (a) calorimeter power, and (b) radiometer 1 and 2 measurement.

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In