Experimental Investigation on Performance Parameters Affecting the Efficiency of Water Type PV/Thermal Collectors with Modified Absorber Configurations

Year 2021, , 915 - 931, 01.09.2021

Halil İbrahim Dağ , Günnur Kocar

https://doi.org/10.2339/politeknik.724033

Cited By: 2

Abstract

In this study, efficiency of water-type photovoltaic/thermal (PV/T) modules that convert solar energy into both electrical and thermal energy were investigated. By using identical photovoltaic (PV) cells, one PV module and five PV/T modules differed in thermal structure with different diameters, amount and layout of absorber tubes, and type of absorber sheets were fabricated with lamination technique. Firstly, the electrical efficiency of all samples under Standard Test Conditions was tested by a solar simulator. Efficiency values were between 12.56% and 12.68% under STC. Furthermore, outdoor tests were carried out to investigate the effect of temperature on PV modules in ambient conditions using PV/T samples. In order to determine the efficiency of the units, parameters such as solar irradiation, voltage and current values, inlet and outlet water temperature and flow rate of PV/T modules and ambient temperature were measured. It was observed that the electrical performance of PV/T modules was higher than that of the PV module due to the cooling effect of water circulation over the cells. PV/T module with the highest thermal efficiency was also determined. Total efficiency value of PV/T modules in outdoor conditions were attained between 60.68% and 67.14%.

Keywords

PV, PV/T, solar thermal, performance characteristics, experimental study

Experimental Investigation on Performance Parameters Affecting the Efficiency of Water Type PV/Thermal Collectors with Modified Absorber Configurations

Abstract

In this study, efficiency of water-type photovoltaic/thermal (PV/T) modules that convert solar energy into both electrical and thermal energy were investigated. By using identical photovoltaic (PV) cells, one PV module and five PV/T modules differed in thermal structure with different diameters, amount and layout of absorber tubes, and type of absorber sheets were fabricated with lamination technique. Firstly, the electrical efficiency of all samples under Standard Test Conditions was tested by a sun simulator. Efficiency values were between 12.56% and 12.68% under STC. Furthermore, outdoor tests were carried out to investigate the effect of temperature on PV modules in ambient conditions using PV/T samples. In order to determine the efficiency of the units, parameters such as solar irradiation, voltage and current values, inlet and outlet water temperature and flow rate of PV/T modules and ambient temperature were measured. It was observed that the electrical performance of PV/T modules was higher than that of the PV module due to the cooling effect of water circulation over the cells. PV/T module with the highest thermal efficiency was also determined. Total efficiency value of PV/T modules in outdoor conditions were attained between 60.68% and 67.14%.

Keywords

PV, Solar Thermal, PV/T, Performance Characteristics, Experimental Study

References

• DAG, H. I.; BUKER, M. S. Performance evaluation and degradation assessment of crystalline silicon based photovoltaic rooftop technologies under outdoor conditions. Renewable Energy, (2019).
• BUKER, Mahmut Sami; RIFFAT, Saffa B. Preliminary performance test of a combined solar thermal roof system with heat pump for buildings. Energy Procedia, 91: 421-431, (2016).
• PERLIN, John. Let it shine: the 6,000-year story of solar energy. New World Library, 2013.
• https://www.iea.org/reports/tracking-power-2019/solar-pv (accessed on 17.04.2020)
• BUKER, Mahmut Sami; RIFFAT, Saffa B. Performance analysis of a combined Building Integrated PV/T Collector with a liquid desiccant enhanced dew point cooler. Energy Procedia, 2016, 91: 717-727.
• BÖER, Karl W.; TAMM, Gunnar. Solar conversion under consideration of energy and entropy. Solar energy, 2003, 74.6: 525-528.
• ZONDAG, H. A. Flat-plate PV-Thermal collectors and systems: A review. Renewable and Sustainable Energy Reviews, 2008, 12.4: 891-959.
• KALOGIROU, Soteris A.; TRIPANAGNOSTOPOULOS, Yiannis. Hybrid PV/T solar systems for domestic hot water and electricity production. Energy conversion and management, 2006, 47.18-19: 3368-3382.
• KOÇ, İlayda; BAŞARAN, Kıvanç. PV/T Tabanlı Bir Sistemde MATLAB/Simulink Kullanılarak Yapılan Performans Analizi. Politeknik Dergisi, 22.1: 229-236.
• KUMAR, Rakesh; ROSEN, Marc A. Performance evaluation of a double pass PV/T solar air heater with and without fins. Applied Thermal Engineering, 2011, 31.8-9: 1402-1410.
• AL-WAELI, Ali HA, et al. Comparison of prediction methods of PV/T nanofluid and nano-PCM system using a measured dataset and artificial neural network. Solar Energy, 2018, 162: 378-396.
• REJEB, Oussama; DHAOU, Houcine; JEMNI, Abdelmajid. A numerical investigation of a photovoltaic thermal (PV/T) collector. Renewable Energy, 2015, 77: 43-50.
• LIANG, Ruobing, et al. Performance evaluation of new type hybrid photovoltaic/thermal solar collector by experimental study. Applied Thermal Engineering, 2015, 75: 487-492.
• ASTE, Niccolò; LEONFORTE, Fabrizio; DEL PERO, Claudio. Design, modeling and performance monitoring of a photovoltaic–thermal (PVT) water collector. Solar Energy, 2015, 112: 85-99.
• NEAMEN, Donald A. Semiconductor physics and devices: basic principles. New York, NY: McGraw-Hill,, 2012.
• MÖLLER, Hans Joachim. Semiconductors for solar cells. Artech House Publishers, 1993.
• DUFFIE, John A.; BECKMAN, William A. Solar engineering of thermal processes. New York: Wiley, 1991.
• RADZIEMSKA, Ewa. Thermal performance of Si and GaAs based solar cells and modules: a review. Progress in Energy and Combustion Science, 2003, 29.5: 407-424.
• BUKER, Mahmut Sami; RIFFAT, Saffa B. Building integrated solar thermal collectors–A review. Renewable and Sustainable Energy Reviews, 2015, 51: 327-346.
• ZONDAG, H. A. Flat-plate PV-Thermal collectors and systems: A review. Renewable and Sustainable Energy Reviews, 2008, 12.4: 891-959.
• CHARALAMBOUS, P. G., et al. Optimization of the photovoltaic thermal (PV/T) collector absorber. Solar energy, 2011, 85.5: 871-880.
• Hottel, H., & Whillier, A. (1955, January). Evaluation of flat-plate solar collector performance. In Trans. Conf. Use of Solar Energy;() (Vol. 3).
• HE, Wei, et al. Hybrid photovoltaic and thermal solar-collector designed for natural circulation of water. Applied energy, 2006, 83.3: 199-210.
• VOKAS, G.; CHRISTANDONIS, N.; SKITTIDES, F. Hybrid photovoltaic–thermal systems for domestic heating and cooling—a theoretical approach. Solar energy, 2006, 80.5: 607-615.
• CHOW, T. T.; HE, W.; JI, J. An experimental study of facade-integrated photovoltaic/water-heating system. Applied thermal engineering, 2007, 27.1: 37-45.
• TRIPANAGNOSTOPOULOS, Y., et al. Energy, cost and LCA results of PV and hybrid PV/T solar systems. Progress in Photovoltaics: Research and applications, 2005, 13.3: 235-250.
• DAĞ, H. İ. Pv-termal kolektörlerin tasarımı, üretimi ve verimini etkileyen parametrelerin belirlenmesi. 2015. PhD Thesis. Doktora Tezi, Ege Üniversitesi, Fen Bilimleri Enstitüsü, İzmir.