Experimental and Theoretical Study of Parabolic Trough Solar Collector Performance Without Automatic Tracking System

Zarrag, Khudir; Abed, Fayadh M.; Kasim, Salim. Y.

doi:10.37652/juaps.2022.172430

Document Type : Research Paper

Authors

¹ Anbar Sewer Directorate, Anbar Province, Ramadi, Iraq

² Department of Mechanical Engineering, Faculty of Engineering, Tikrit University, Tikrit, Iraq

https://doi.org/10.37652/juaps.2022.172430

Abstract

In this research, a practical and theoretical study was conducted to evaluate the performance of parabolic trough collectors (PTCS) of length (3 m) and width (2.67 m) for three solar collectors connected in parallel, and the absorber tube is made of stainless steel with an internal and external diameter (0.028 m), (0.031 m), respectively. The absorber tube of length 11 m, was painted with un shiny black paint to increase the absorption of sunlight and reduces the thermal radiation. The working fluid is transferred through the receiver tube and located at the focus area of the three collectors. The collector width aperture width was 0.8 meters, and 2.40 meters length with rim angle of Ø = 90°, and concentration ratio of 8.02. The collector surface was covered with aluminum foil which is available in the local market (3M SA-85), which covers galvanized iron sheets with a thickness of 2 mm. A computer program in Fortran language was built to calculate the performance of the solar collector. Experimental results of the test showed that the performance factor of the solar collector is less than the typical type, where notes that there is a large deviation between the theoretical and experimental results, especially in the winter, where the deviation in the morning at ten o'clock about 78%, while it was 5% at noon. The large deviation value mentioned resulting from the assumptions that have been developed to simplify the equations that were used in the theoretical side of research, also the reasons that the theoretical results are taken on the assumption that weather conditions are clear sky and that contrary to reality in the winter. ةThe best efficiency of the solar collector was between solar time (12:00) and time (1:00) at night for two seasons, and the obtained results showed that the increase of mass flow rate of fluid from the amount of (0.033) kg/sec to the amount of (0.066) kg/sec increases the efficiency of solar collector, but leads to reduce the temperature difference between the inlet and exit, as well as the results showed that an increase in solar flux increases the useful energy obtained from the solar collector.

Keywords

Main Subjects

Physics

References

[1] Ouagued and Malika,(2011)" Simulation and thermal study of a parabolic Trough Solar Collector" Renewable Energies Development Center CDER, Algiers, Algeria,2nd International Conference on energy conversion and conservation.

[2] Kalogirou, S. A., & Lloyd, S. (1992). Use of solar parabolic trough collectors for hot water production in Cyprus. A feasibility study. Renewable Energy, 2(2), 117-124.

[3] Oommen, R. Y., & Jayaraman, S. (2001). Development and performance analysis of compound parabolic solar concentrators with reduced gap losses–oversized reflector. energy conversion and management, 42(11), 1379-1399.

[4] Morrison, G. L., & Braun, J. E. (1985). System modeling and operation characteristics of thermosyphon solar water heaters. Solar Energy, 34(4-5), 389-405.

[5] Kalogirou, S. (1998). Use of parabolic trough solar energy collectors for sea-water desalination. Applied Energy, 60(2), 65-88.

[6] May, E. K., & Murphy, L. M. (1983). Performance benefits of the direct generation of steam in line-focus solar collectors.,105, pp. 126-133.

[7] Zarza, E., Valenzuela, L., Leo´ n, J., Weyers, H. D., Eickhoff, M., Eck, M., & Hennecke, K. (2002). The DISS project: direct steam generation in parabolic trough systems. Operation and maintenance experience and update on project status. J. Sol. Energy Eng., 124(2), 126-133.

[8] Zarza, E., Valenzuela, L., Leon, J., Hennecke, K., Eck, M., Weyers, H. D., & Eickhoff, M. (2004). Direct steam generation in parabolic troughs: Final results and conclusions of the DISS project. Energy, 29(5-6), 635-644.

[9] García-Rodríguez, L., & Gómez-Camacho, C. (1999). Design parameter selection for a distillation system coupled to a solar parabolic trough collector. Desalination, 122(2-3), 195-204.

[10] García-Rodríguez, L., & Gómez-Camacho, C. (1999). Thermoeconomic analysis of a solar parabolic trough collector distillation plant. Desalination, 122(2-3), 215-224.

[11] Garg, H. P. (2005). Solar energy: fundamentals and applications. Tata McGraw-Hill Education.

[12] Sarker, M. R. I., Beg, M. R. A., Hossain, M. Z., Islam, M. T., & Zaman, M. R. (2005). Design of a Software Controlled Two axis Automatic Solar tracking system. Mech. Eng. Res. Journal, 5.

[13]Hegazy, A. S., & ElMadany, M. M. (2007, November). Design and experimental testing of a solar parabolic trough collector with its tracking system for salt-water desalination in arid areas of Saudi Arabia. In Proceedings, 7th Saudi Engineering Conference (pp. 02-05).

[14] Dagan, E., Muller, M., & Lippke, F. (1992). Direct steam generation in the parabolic trough collector. Report of Platafoma Solar de Almeria, Madrid.

[15] Lippke, F. (1996). Direct steam generation in parabolic trough solar power plants: numerical investigation of the transients and the control of a once-through system.

[16] Kalogirou, S. (1996). Parabolic trough collector system for low temperature steam generation: design and performance characteristics. Applied Energy, 55(1), 1-19.

[17] Ibrahim, S. M. (1996). The forced circulation performance of a sun tracking parabolic concentrator collector. Renewable energy, 9(1-4), 568-571.

[18] Almanza, R., Lentz, A., & Jimenez, G. (1997). Receiver behavior in direct steam generation with parabolic troughs. Solar Energy, 61(4), 275-278.

[19] Bakos, G. C., Adamopoulos, D., Tsagas, N. F., & Soursos, M. (1999). Design and construction of a line-focus parabolic trough solar concentrator for electricity generation. In Proceedings of ISES solar world congress, Jerusalem (p. 16).

[20] Singh, B., & Sulaiman, F. (2001). Hfactor To Determine The Convective Heat Transfer Coefficient Of Saturated Water Flowing In Tubes. Persidangan Fizik Kebangsaan (PERFIK 2001), jointly organized by the Physics Institute of Malaysia and University Malaya.

[21] Kulkarni MH, Shinde NN(2008). Design, Construction and Review of Thermal Performance of Closed Cylindrical Parabolic Trough.

[22] Yassen, T. A. (2012). Experimental and theoretical study of a parabolic trough solar collector. Anbar J. Eng. Sci, 5(1), 109-125.

[23] Incropera, F. P., Lavine, A. S., Bergman, T. L., & DeWitt, D. P. (2011). Fundamentals of heat and mass transfer.Wiley.

Journal of University of Anbar for Pure Science

Experimental and Theoretical Study of Parabolic Trough Solar Collector Performance Without Automatic Tracking System

References

References

Volume 15, Issue 1
April 2021
Page 37-48

Experimental and Theoretical Study of Parabolic Trough Solar Collector Performance Without Automatic Tracking System

References

References

Volume 15, Issue 1April 2021Page 37-48

Volume 15, Issue 1
April 2021
Page 37-48