An Experimental Comparative Study of Flat and Extended-Surface PCM Containers for Passive Cooling of Photovoltaic Panels
Source abstract
Abstract
In this study, an experimental investigation was conducted to evaluate the thermal and electrical behavior of three photovoltaic panel configurations under controlled indoor solar irradiation of 600, 800, and 1000 W/m2, considering both natural and forced convection to the surrounding air. The tested configurations included an uncooled reference panel (PV-1), a PCM-cooled panel incorporating a flat rear container (PV-2), and a proposed PCM-cooled panel equipped with an extended-surface rear container (PV-3). A PCM characterized by a phase change temperature range of 41–48 °C was employed. The results showed that the extended-surface PCM configuration associated with PV-3 provides a more effective passive cooling solution compared to the flat container design. Under natural convection, this thermal advantage of PV-3 became more pronounced, with a maximum temperature reduction of 15 °C at 1000 W/m2 after 170 min of operation, compared to PV-2. Consequently, PV-3 achieved the highest electrical performance, delivering peak efficiency enhancements of 12.05% and 7.38% relative to PV-1 and PV-2, respectively, and average efficiency gains of 7.06% and 5.35% over the entire test period. Under forced convection, however, performance differences among the configurations were minimal because forced convection dominated the heat removal process, reducing the influence of the PCM.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Solar Thermal and Photovoltaic Systems · Phase Change Materials Research · Heat Transfer Mechanisms
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Mechanical Engineering Department, College of Engineering, King Saud University, Riyadh 11451, Saudi Arabia
Funding
King Saud University
References (39)
Show source-provided references
1. Phase change materials for enhanced photovoltaic panels performance: A comprehensive review and critical analysis10.1016/j.enbenv.2024.02.004 ↗
2. Degradation and reliability analysis of photovoltaic modules after operating for 12 years: A case study with comparisons10.1016/j.renene.2022.07.048 ↗
3. Castro, R., and Teixeira, I. (2025). Heat Waves and Photovoltaic Performance: Modelling, Sensitivity, and Economic Impacts in Portugal. Sustainability, 18.10.3390/su18010289 ↗
4. An experimental assessment of a solar PVT-PCM thermal management system in severe climatic conditions10.1016/j.jobe.2024.110691 ↗
5. Harmailil, I.O., Sultan, S.M., Fudholi, A., Mohammad, M., and Tso, C.P. (2025). Enhancing PV Module Efficiency Through Fins-and-Tubes Cooling: An Outdoor Malaysian Case Study. Processes, 13.10.3390/pr13092812 ↗
6. Harmailil, I.O., Sultan, S.M., Tso, C.P., Fudholi, A., Mohammad, M., and Ibrahim, A. (2024). The State of the Art of Photovoltaic Module Cooling Techniques and Performance Assessment Methods. Symmetry, 16.10.3390/sym16040412 ↗
7. Enhanced performance of photovoltaic thermal module and solar thermal flat plate collector connected in series through integration with phase change materials: A comparative study10.1016/j.tsep.2023.102305 ↗
8. Novel enhanced conduction model for predicting performance of a PV panel cooled by PCM10.1016/j.enconman.2019.112456 ↗
9. Colarossi, D., and Principi, P. (2021). Indoor and Outdoor Performance of an Enhanced Photovoltaic Panel through Graphene/Fins/Phase Change Materials. Appl. Sci., 11.10.3390/app11198807 ↗
10. Thermal management in EV wireless charging: Breakthroughs, challenges, and next-generation cooling strategies10.1016/j.decarb.2025.100133 ↗
11. Elsheniti, M.B., Zaheer, S., Zeitoun, O., Alshehri, H., AlRabiah, A., and Almutairi, Z. (2022). Experimental Evaluation of a Solar Low-Concentration Photovoltaic/Thermal System Combined with a Phase-Change Material Cooling Technique. Appl. Sci., 13.10.3390/app13010025 ↗
12. Improving energy efficiency of photovoltaic/thermal systems by cooling with PCM nano-emulsions: An indoor experimental study10.1016/j.renene.2022.12.090 ↗
13. Performance evaluation with low-cost aluminum reflectors and phase change material integrated to solar PV modules using natural air convection: An experimental investigation10.1016/j.energy.2022.126415 ↗
14. Passive Thermal Management of Photovoltaic Panel by Using Phase Change Material-Filled Aluminum Cans: An Experimental Study10.1615/HeatTransRes.2022041473 ↗
15. Improving the thermal regulation and efficiency enhancement of PCM-Integrated PV modules using nano particles10.1016/j.enconman.2018.04.035 ↗
16. Thermal management of photovoltaic solar cells using polyethylene glycol 1000 (PEG1000) as a phase change material10.1016/j.tsep.2018.01.012 ↗
17. Nanofluid-based photovoltaic thermal solar collector with nanoparticle-enhanced phase change material (Nano-PCM) and twisted absorber tubes10.1016/j.csite.2023.103299 ↗
18. Experimental analysis for the photovoltaic thermal collector (PVT) with nano PCM and micro-fins tube nanofluid10.1016/j.csite.2022.102579 ↗
19. The Performance Evaluation of Photovoltaic Integrated Organic Phase Change Material in a Single Container using Indoor Solar Simulator10.37934/arfmts.109.2.168183 ↗
20. Improved efficiency of photovoltaic/thermal system with phase change materials: Experimental study10.1016/j.applthermaleng.2025.129273 ↗
21. The role of fin–PCM integration in enhancing photovoltaic performance10.1016/j.grets.2025.100306 ↗
22. Experimental investigation on the effect of wind as a natural cooling agent for photovoltaic power plants in desert locations10.1016/j.csite.2023.103038 ↗
23. Investigation of the cooling effect of wind on rooftop PV power plants10.1016/j.csite.2024.105295 ↗
24. Hudișteanu, S.V., Țurcanu, F.E., Cherecheș, N.-C., Popovici, C.-G., Verdeș, M., Ancaș, D.-A., and Hudișteanu, I. (2022). Effect of Wind Direction and Velocity on PV Panels Cooling with Perforated Heat Sinks. Appl. Sci., 12.10.3390/app12199665 ↗
25. Thermal management of photovoltaic modules using phase change materials: Experimental and numerical investigations10.1016/j.applthermaleng.2025.127645 ↗
26. Efficiency enhancement of PV panels with passive thermal management using PCM: An exhaustive review on materials, designs and effective techniques10.1016/j.apenergy.2024.125217 ↗
27. A CFD analysis of photovoltaic panel cooling: A review10.1007/s44189-025-00096-w ↗
28. Hassanian, R., Yeganeh, N., and Riedel, M. (2024). Wind Velocity and Forced Heat Transfer Model for Photovoltaic Module. Fluids, 9.10.3390/fluids9010017 ↗
29. HKUC Sensor Technology (2026, March 15). Hukseflux Pyranometer. Available online: https://www.hukseflux.com/uploads/inline/LP02_manual_v2008_DISCONTINUED.pdf.
30. (2026, March 15). PROVA 200A. PV Analyzer PROVA-200A Datasheet. Available online: https://www.prova.com.tw/img/download/200A-Data%20Sheet-2015.pdf.
31. Rubitherm (2026, March 15). RUBITHERM® RT47 Datasheet. Available online: https://www.rubitherm.eu/media/products/datasheets/Techdata_-RT47_EN_09102020.PDF.
32. Enhanced photovoltaic performance via press-fitted phase change material tubes for passive thermal management10.1016/j.applthermaleng.2026.130938 ↗
33. Holman, J.P. (2011). Experimental Methods for Engineers, McGraw-Hill. [8th ed.].
34. Integration of photovoltaic modules with phase change materials: Experimental testing, model validation and optimization10.1016/j.energy.2025.134959 ↗
35. The effect of PCM layer thickness and coolant mass flow rate on the efficiency of a double-channel photovoltaic/thermal-PCM system: Numerical and artificial neural network analysis10.1016/j.enganabound.2023.12.004 ↗
36. Temperature dependence of solar cell performance—An analysis10.1016/j.solmat.2012.02.019 ↗
37. Temperature Effect on Performance of Different Solar Cell Technologies10.12911/22998993/105543 ↗
38. Mechanism analysis and quantitative evaluation of series mismatch losses in photovoltaic modules10.1016/j.egyr.2026.109078 ↗
39. Temperature profiles of field-aged photovoltaic modules affected by optical degradation10.1016/j.heliyon.2023.e19566 ↗