Analysis of the Effect of Transparent Covers on Receiver of Cylindrical Parabolic Solar Collectors

Yıl 2023, Cilt: 26 Sayı: 2, 495 - 502, 05.07.2023

Apdulmutalip Şahinaslan , Mehmet Buruntekin Mesut Öztop

https://doi.org/10.2339/politeknik.955919

Öz

Parabolic solar collectors with central receiving systems are preferred due to their high efficiency despite their high initial investment and operating costs. In this study, the effect of two glass covers on tubular collector will be investigated, aiming enhancement of cylindrical parabolic solar collectors’ efficiency. By using glass cover it is aimed to decrease losses and increase efficiency. In order to investigate the changes of losses and instantaneous efficiency, a model was constructed considering all parameters of the structure, optical losses, material properties and outdoor climatic conditions. Results of calculations show that the two-cover system is not more efficient than the single cover system at low fluid temperatures between 0 and 500 K and the efficiency of the two-cover system is increased at medium fluid temperatures between 500 and 700 K.

Anahtar Kelimeler

Parabolic solar collectors, efficiency of collectors, solar energy, renewable energy sources

Silindirik Parabolik Güneş Toplayıcılarda Alıcı Üzerine Uygulanan Saydam Örtünün Etkisinin Analizi

Öz

Parabolik güneş toplayıcıları yüksek verimleri sebebiyle tercih edilmekte, diğer uygulamalara göre düşük işletme ve ilk yatırım maliyetleri ile silindirik parabolik güneş toplayıcıları ön plana çıkmaktadır. Bu çalışmada, silindirik parabolik güneş toplayıcılarının veriminin artırılmasına yönelik toplayıcı boru üzerine ikinci cam katmanı uygulamasının etkileri incelenecektir. Bu şekilde kayıpların azaltılarak verimin artması öngörülmüştür. Kayıpların ve anlık verimin değişimini inceleyebilmek için parabolik oluk kollektör sistemini oluşturan yapının tüm parametreleri, optik kayıplar, malzeme özellikleri ve dış ortam iklim şartları dikkate alınarak bir model oluşturulmuş, gerekli hesaplamalar yapılarak sonuçları değerlendirilmiştir. Çalışmanın sonucunda 0–500 K arasındaki düşük akışkan sıcaklıklarında ikinci katmanın bir katmanlı sisteme göre daha verimli olmadığı, 500–700 K arasındaki orta akışkan sıcaklıklarında ise çift katmanlı sistemin veriminin yükseldiği görülmüştür.

Anahtar Kelimeler

Güneş enerjisi, parabolik güneş kollektörleri, yenilenebilir enerji kaynakları

Kaynakça

• [1] Ozbas E, Selimli S, Ozkaymak M, Frej A S.S., “Evaluation of internal structure modifications effect of two-phase closed thermosyphon on performance an experimental study”, Solar Energy, 224: 1326-1332, (2021).
• [2] Chaanaoui M, Vaudreuil S, Bounahmidi T., “Benchmark of Concentrating Solar Power Plants: Historical, Current and Future Technical and Economic Development”, Procedia Comput Sci, 83: 782–789, (2016).
• [3] www.epa.gov/rhc/solar-heating-and-cooling-technologies (2021)
• [4] A. Fern_andez-García, E. Zarza, L. Valenzuela, M. P_erez, “Parabolic-trough solar collectors and their applications”, Renewable and Sustainable Energy Reviews, 14, issue 7: 1695-1721, (2010)
• [5] Wu, Y, Liu, S, Xiong, Y, Ma, C & Ding, Y, “Experimental study on the heat transfer characteristics of a low melting point salt in a parabolic trough solar collector system”, Applied Thermal Engineering, vol. 89, 748- 754, (2015)
• [6] http://www.yegm.gov.tr/ yenilenebilir/g_enj_tekno.aspx (2021)
• [7] Fei Chen, Ming Li, Reda Hassanien Emam Hassanien, Xi Luo, Yongrui Hong, Zhikang Feng, Mengen Ji, Peng Zhang, “Study on the Optical Properties of Triangular Cavity Absorber for Parabolic Trough Solar Concentrator”, International Journal of Photoenergy, Article ID 895946, 9 pages, (2015).
• [8] Sandeep, H.M. & Arunachala, U.C., "Solar parabolic trough collectors: A review on heat transfer augmentation techniques," Renewable and Sustainable Energy Reviews, Elsevier, 69(C): 1218-1231, (2017).
• [9] P. Daniel, Y. Joshi, A.K. Das, “Numerical investigation of parabolic trough receiver performance with outer vacuum shell”, Sol. Energy 85 (9): 1910-1914, (2011)
• [10] J.D. Osorio, A. Rivera-Alvarez, P. Girurugwiro, S. Yang, R. Hovsapian, J.C. Ordonez, “Integration of transparent insulation materials into solar collector devices, Sol. Energy 147: 8-21, (2017).
• [11] Q. Wang, G. Pei, Y. Honglun, A. Munir, H. Mingke, “Performance study of a parabolic trough solar collector with an inner radiation shield”, Bulgarian Chemical Communication 2016, 48 (E): 77-87, (2016).
• [12] M. Wirz, J. Petit, A. Haselbacher, A. Steinfeld, “Potential improvements in the optical and thermal efficiencies of parabolic trough concentrators”, Solar Energy 107: 398-414, (2014).
• [13] A. Kılıç, A. Öztürk, “Solar Energy”, Kiptaş, İstanbul, (1983).
• [14] E. C_espedes, M. Wirz, J.A. S_anchez-García, L. Alvarez-Fraga, R. Escobar-Galindo, C. Prieto, “Novel Mo-Si3N4 based selective coating for high temperature concentrating solar power applications”, Solar Energy Materials and Solar Cells, 122: 217-225, (2014).
• [15] Çolak, L., “Mathematical Modelling, Design and Technical Optimisation of Parabolic Solar Collectors with Solar Tracking”, Doctorate Thesis, Gazi University, Ankara, Turkey, (2003).
• [16] J. Subramani, P.K. Nagarajan, O. Mahian, R. Sathyamurthy, “Efficiency and heat transfer improvements in a parabolic trough solar collector using TiO2 nanofluids under turbulent flow regime”, Renewable Energy 119: 19-31, (2018).
• [17] A. Mwesigye, Z. Huan, J.P. Meyer, “Thermal performance and entropy generation analysis of a high concentration ratio parabolic trough solar collector with Cu-Therminol® VP-1 nanofluid”, Energy Conversation and Management, 120: 449-465, (2016).
• [18] M. D.Espana, and Luis Rodriguez, V. Approximate “Steady-State Modelling of Solar Through Collectors”, Solar Energy, Vol. 38, No: 6, 447-454, (1987).
• [19] S. Candeniz, “Thermodynamic Analysis of Cylindirical Parabolic Solar Collectors”, 8th. National Pipeline Engineering Congress and Exhibition–TESKON 2007, 157-172, (2007) (Originally in Turkish).
• [20] S. W. Churchill, M. J. Bernstein, “A correlating equation for forced convection from gases and liquids to a circular cylinder in crossflow”, Heat Transfer, 99: 300-306, (1977).
• [21] https://www.dow.com/content/dam/dcc/documents/en-us/productdatasheet/176/176-01463-01-dowtherm-a-tds.pdf?iframe=true DOWNTHERM A, Product Technical Data, Producer Company Dow
• [22] Ihaddadène, N., Ihaddadène, R., & Mahdi, A., “Effects of Double Glazing on the Performance of a Solar Thermal Collector”, Applied Mechanics and Materials, 492: 118–122, (2014).