International Scientific Journal


In this work, two new compound parabolic trough and dish solar collectors are presented with their working principles. First, the curves of mirrors are defined and the mathematical formulation as one analytical method is used to trace the sun rays and recognize the focus point. As a result of the ray tracing, the distribution of heat flux around the inner wall can be reached. Next, the heat fluxes are calculated versus several absorption coefficients. These heat flux distributions around absorber tube are functions of angle in polar coordinate system. Considering, the achieved heat flux distribution are used as a thermal boundary condition. After that, Finite Volume Methods (FVM) are applied for simulation of absorber tube. The validation of solving method is done by comparing with Dudley's results at Sandia National Research Laboratory. Also, in order to have a good comparison between LS-2 and two new designed collectors, some of their parameters are considered equal with together. These parameters are consist of: the aperture area, the measures of tube geometry, the thermal properties of absorber tube, the working fluid, the solar radiation intensity and the mass flow rate of LS-2 collector are applied for simulation of the new presented collectors. After the validation of the used numerical models, this method is applied to simulation of the new designed models. Finally, the outlet results of new designed collector are compared with LS-2 classic collector. Obviously, the obtained results from the comparison show the improving of the new designed parabolic collectors efficiency. In the best case-study, the improving of efficiency are about 10% and 20% for linear and convoluted models respectively.
PAPER REVISED: 2013-06-19
PAPER ACCEPTED: 2013-06-26
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2014, VOLUME 18, ISSUE Supplement 2, PAGES [S323 - S334]
  1. Richter, J. L., Optics of a two-trough solar concentrator, Solar Energy, 56 (1996), pp. 191-198
  2. Price, H., Lupfert, E., Kearney, D., Advances in parabolic trough solar power technology, Journal of Solar Energy Engineering, 124 (2002), 5, pp. 109-125
  3. Schwarzer, K., Eugenia, M.E. Vieira da Silva, Characterization and design methods of solar cookers, Solar Energy, 82 (2008), pp. 157-163
  4. Kaiyan, H., Hongfei, Z., Yixin, L., Ziqian, C., An imaging compounding parabolic concentrator, Proceeding of ISES Solar World Congress, 2 (2007), pp. 589-592
  5. Winston, R., Principles of solar concentrators of a novel design, Solar Energy, 16 (1974), pp. 89-95
  6. Fraidenraich, N., Chigueru, T., Branda, B., Vilela, O., Analytic solutions for the geometric and optical properties of stationary compound parabolic concentrators with fully illuminated inverted V receiver, Solar Energy, 82 (2008), pp. 132-143.
  7. S.M. Jeter, "Calculation of the concentrated flux distribution in parabolic trough collectors by a semifinite formulation", Solar Energy, 37 (1986), pp.335-345.
  8. Dudley, V., Kolb, G., Sloan, M., Kearney, D., SEGS LS2 solar collector-test results, Report of Sandia National Laboratories, SANDIA94-1884, USA, 1994
  9. Z.D. Cheng, Y.L. He, J. Xiao, Y.B. Tao, R.j. Xu, Three-dimensional numerical study of heat transfer characteristics in the receiver tube of parabolic trough solar collector. International Communications in Heat and Mass Transfer, 37 (2010) 782-787
  10. Tao. W.Q., Numerical Heat Transfer, second ed, Xi'an Jiaotong University Press, Xi'an, China, 2001

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence