Thinner Walls, Slower Flow: CFD Design of a Cavity-Receiver Heat Plate for a Solar Fresh Water Generator Serving Coastal Communities
DOI:
https://doi.org/10.55927/esa.v5i5.32Keywords:
Cavity Receiver, Concentrated Solar Power, Computational Fluid Dynamics, Solar Desalination, Heat Transfer CoefficientAbstract
Coastal communities in Indonesia face a persistent shortage of potable water, since abrasion renders groundwater brackish and piped supply networks do not reach many settlements. A solar-driven fresh water generator offers a decentralised remedy, and the thermal performance of such a device is governed principally by the design of its heat receiver. This study determines the cavity-receiver heat plate configuration that maximises the overall heat transfer coefficient in a small parabolic dish system, using computational fluid dynamics simulation in ANSYS Fluent to compare two designs differing in wall thickness and working-fluid velocity. Model 1 combined a wall thickness of 1 mm with a flow velocity of 0.05 m/s; Model 2 combined 2 mm with 0.15 m/s. Water was adopted as the working fluid, with temperature-dependent specific heat, density, and dynamic viscosity represented by polynomial functions. Simulation showed that Model 1 produced a uniform temperature distribution across the inner plate surface and attained the higher outlet temperature, whereas Model 2 concentrated heat at a single region and remained below 40 °C. Model 1 also exhibited the lower internal pressure and a pronounced pressure drop across the plate outlet, conditions associated with more effective absorption of concentrated radiation. The study concludes that the thinner wall reduces conductive resistance while the lower velocity lengthens residence time, and that these two effects act in the same direction. The recommended configuration is therefore a 1 mm inverted cavity operating at 0.05 m/s, which the simulation indicates can raise the working fluid to 54 °C.
References
Abd Elbar, A. R., & Hassan, H. (2020). Enhancement of hybrid solar desalination system composed of solar panel and solar still by using porous material and saline water preheating. Solar Energy, 204, 382-394. https://doi.org/10.1016/j.solener.2020.04.058
Abed, A. A., El-Marghany, M. R., El-Awady, W. M., & Hamed, A. M. (2024). Recent advances in parabolic dish solar concentrators: Receiver design, heat loss reduction, and nanofluid optimization for enhanced efficiency and applications. Solar Energy Materials and Solar Cells, 273, Article 112930. https://doi.org/10.1016/j.solmat.2024.112930
Bellos, E., Bousi, E., Tzivanidis, C., & Pavlovic, S. (2019). Optical and thermal analysis of different cavity receiver designs for solar dish concentrators. Energy Conversion and Management: X, 2, Article 100013. https://doi.org/10.1016/j.ecmx.2019.100013
Daabo, A. M., Mahmoud, S., & Al-Dadah, R. K. (2016). The effect of receiver geometry on the optical performance of a small-scale solar cavity receiver for parabolic dish applications. Energy, 114, 513-525. https://doi.org/10.1016/j.energy.2016.08.025
de Paula, A. C. O., & Ismail, K. A. R. (2021). Comprehensive investigation of water film thickness effects on the heat and mass transfer of an inclined solar still. Desalination, 500, Article 114895. https://doi.org/10.1016/j.desal.2020.114895
Hafez, A. Z., Soliman, A., El-Metwally, K. A., & Ismail, I. M. (2017). Design analysis factors and specifications of solar dish technologies for different systems and applications. Renewable and Sustainable Energy Reviews, 67, 1019-1036. https://doi.org/10.1016/j.rser.2016.09.077
Hijazi, H., Mokhiamar, O., & Elsamni, O. (2016). Mechanical design of a low cost parabolic solar dish concentrator. Alexandria Engineering Journal, 55(1), 1-11. https://doi.org/10.1016/j.aej.2016.01.028
Hoque, A., Abir, A. H., & Paul Shourov, K. (2019). Solar still for saline water desalination for low-income coastal areas. Applied Water Science, 9(4), Article 104. https://doi.org/10.1007/s13201-019-0986-9
Kanatani, K., Yamamoto, T., Tamaura, Y., & Kikura, H. (2017). A model of a solar cavity receiver with coiled tubes. Solar Energy, 153, 249-261. https://doi.org/10.1016/j.solener.2017.05.061
Kumar, S., Ahmad, A., Irshad, K., Prakash, O., Kausher, R., Hasnain, S. M. M., Pandey, S., Tapalova, A., Akylbekov, N., & Zairov, R. (2024). Solar stills: A review for water scarcity solutions. Heliyon, 10(19), Article e38751. https://doi.org/10.1016/j.heliyon.2024.e38751
Ling-zhi, R., Xin-gang, Z., Yu-zhuo, Z., & Yan-bin, L. (2018). The economic performance of concentrated solar power industry in China. Journal of Cleaner Production, 205, 799-813. https://doi.org/10.1016/j.jclepro.2018.09.110
Loni, R., Kasaeian, A. B., Askari Asli-Ardeh, E., Ghobadian, B., & Gorjian, S. (2018). Experimental and numerical study on dish concentrator with cubical and cylindrical cavity receivers using thermal oil. Energy, 154, 168-181. https://doi.org/10.1016/j.energy.2018.04.102
Madhuri, R. V. S., Said, Z., Ihsanullah, I., & Sathyamurthy, R. (2025). Solar energy-driven desalination: A renewable solution for climate change mitigation and advancing sustainable development goals. Desalination, 602, Article 118575. https://doi.org/10.1016/j.desal.2025.118575
Mandal, P., Rajan, A., & Reddy, K. S. (2024). Optical and thermal investigation of hyperbolic cavity receiver with secondary reflector for solar parabolic dish collector. Thermal Science and Engineering Progress, 47, Article 102350. https://doi.org/10.1016/j.tsep.2023.102350
Pratik, N. A., Ali, M. H., Lubaba, N., Hasan, N., Asaduzzaman, M., & Miyara, A. (2024). Numerical investigation to optimize the modified cavity receiver for enhancement of thermal performance of solar parabolic dish collector system. Energy, 290, Article 130133. https://doi.org/10.1016/j.energy.2023.130133
Quezada-Garcia, S., Sanchez-Mora, H., Polo-Labarrios, M. A., & Cazares-Ramirez, R. I. (2019). Modeling and simulation to determine the thermal efficiency of a parabolic solar trough collector system. Case Studies in Thermal Engineering, 16, Article 100523. https://doi.org/10.1016/j.csite.2019.100523
Roostaee, A., & Ameri, M. (2019). Effect of linear Fresnel concentrators field key parameters on reflectors configuration, trapezoidal cavity receiver dimension, and heat loss. Renewable Energy, 134, 1447-1464. https://doi.org/10.1016/j.renene.2018.09.053
Sandoval, O. R., Caetano, B. C., Borges, M. U., Garcia, J. J., & Valle, R. M. (2019). Modelling, simulation and thermal analysis of a solar dish/Stirling system: A case study in Natal, Brazil. Energy Conversion and Management, 181, 189-201. https://doi.org/10.1016/j.enconman.2018.12.005
Sheeba, A., Akhil, R., & Prakash, M. J. (2020). Heat transfer and flow characteristics of a conical coil heat exchanger. International Journal of Refrigeration, 110, 268-276. https://doi.org/10.1016/j.ijrefrig.2019.10.006
Si-Quan, Z., Xin-Feng, L., Liu, D., & Qing-Song, M. (2019). A numerical study on optical and thermodynamic characteristics of a spherical cavity receiver. Applied Thermal Engineering, 149, 11-21. https://doi.org/10.1016/j.applthermaleng.2018.10.030
Turrini, S., Bettonte, M., Eccher, M., Grigiante, M., Miotello, A., & Brusa, R. S. (2018). An innovative small-scale prototype plant integrating a solar dish concentrator with a molten salt storage system. Renewable Energy, 123, 150-161. https://doi.org/10.1016/j.renene.2018.02.053
Venkatachalam, T., & Cheralathan, M. (2019). Effect of aspect ratio on thermal performance of cavity receiver for solar parabolic dish concentrator: An experimental study. Renewable Energy, 139, 573-581. https://doi.org/10.1016/j.renene.2019.02.102
Wang, L., Zheng, H., Chen, Q., Jin, R., & Ng, K. C. (2023). Heat and mass transfer analysis and optimization of passive interfacial solar still. Desalination, 561, Article 116681. https://doi.org/10.1016/j.desal.2023.116681
Yan, J., Peng, Y., & Cheng, Z. (2018). Optimization of a discrete dish concentrator for uniform flux distribution on the cavity receiver of solar concentrator system. Renewable Energy, 129, 431-445. https://doi.org/10.1016/j.renene.2018.06.025
Yushchenko, A., de Bono, A., Chatenoux, B., Kumar Patel, M., & Ray, N. (2018). GIS-based assessment of photovoltaic (PV) and concentrated solar power (CSP) generation potential in West Africa. Renewable and Sustainable Energy Reviews, 81, 2088-2103. https://doi.org/10.1016/j.rser.2017.06.021
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