International Scientific Journal


Solar energy may be practically utilized directly through transformation into heat, electrical or chemical energy. A physical and mathematical model is presented, as well as a numerical procedure for predicting thermal performances of the P2CC solar concentrator. The demonstrated prototype has the reception angle of 110° at concentration ratio CR = 1.38, with the significant reception of diffuse radiation. The solar collector P2CC is designed for the area of middle temperature conversion of solar radiation into heat. The working fluid is water with laminar flow through a copper pipe surrounded by an evacuated glass layer. Based on the physical model, a mathematical model is introduced, which consists of energy balance equations for four collector components. In this paper, water temperatures in flow directions are numerically predicted, as well as temperatures of relevant P2CC collector components for various values of input temperatures and mass flow rates of the working fluid, and also for various values of direct sunlight radiation and for different collector lengths. The device which is used to transform solar energy to heat is referred to as solar collector. This paper gives numerical estimated changes of temperature in the direction of fluid flow for different flow rates, different solar radiation intensity and different inlet fluid temperatures. The increase in fluid flow reduces output temperature, while the increase in solar radiation intensity and inlet water temperature increases output temperature of water. Furthermore, the dependence on fluid output temperature is determined, along with the current efficiency by the number of nodes in the numerical calculation.
PAPER REVISED: 2012-09-24
PAPER ACCEPTED: 2012-09-28
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THERMAL SCIENCE YEAR 2012, VOLUME 16, ISSUE Supplement 2, PAGES [S471 - S482]
  1. Tchinda, R., Kaptouom, E., Njomo, D., Study of the CPC collector thermal behaviour, Energy Conversion and. Management, 39, (1998), 13, pp. 1395-1406.
  2. Norton, B., Kothdiwala, A. and Eames, P., Effect of inclination on the performance of CPC solar energy collectors, Renewable Energy, 5, (1994), 1, pp. 357-367.
  3. Oommen, R., Jayaraman, S., Development and performance analysis of compound parabolic solar concentrators with reduced gap losses - oversized reflector, Energy Conversion and Management, 42, (2001), 2, pp. 1379-1399.
  4. Gata, P. et al. A non static compound parabolic concentrator (CPC) for residential and service buildings, International Conference on Renewable Energy and Power Quality, ICREPQ'06, Palma de Mallorca, Spain, 2006, Vol. 1, pp 34-42.
  5. Nikoliæ, B., The modified compound parabolic concentrator CPC-2V, Diploma thesis, Mechanical Engineering in Nis, University in Nis, Serbia, 1994.
  6. Nikoliæ, B., Lakoviæ, S., Stefanoviæ, V., Implementation of the concentrator solar energy in the field of medium temperature conversion, 26th International Conference on heating, refrigerating and airconditioning, Belgrade, Serbia, 1995, Vol. 2, pp. 29-40.
  7. Stefanoviæ, V. et al., Development of the new generation of solar receivers for area of low and medium temperature solar energy conversion into heat and application and family residential building prototype with a hybrid passive and active systems use of solar eneregy, Report No. 709300036, University of Nis, Nis, Serbia, 2004.
  8. Stefanoviæ, V. et al., Elaborate I, II i III, Report No. 709300036, University of Nis, Nis, Serbia, 2004.
  9. Duffie, J., Beckman, W., Solar Engineering of Thermal Process, John Wiley and Sons Inc., New York, USA, 1991.

© 2023 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