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Heat Transfer Enhancement in Solar Parabolic Trough Collectors Design Using C-shape, V-shape, and Reverse L-shape Roughness

Abhishek ., C. S. Koli

Abstract


Solar energy can be collected and used in a large variety of ways including: passive daylighting,
heating liquids and gasses, or generating electricity. Additionally, many energy sources such as wind,
biomass, hydroelectricity, and even fossil fuels originate from the energy provided by the sun.
Parabolic solar concentration systems are state-of-the-art or mature technology. Parabolic-trough
solar concentrating systems are parabolic-shaped collectors made of reflecting materials. The
collectors reflect incident solar radiation onto its focal line toward a receiver that absorbs
concentrated solar energy to raise the temperature of the fluid inside it. The heat transfer from
smooth surface to fluid is smaller since the fluid is mostly laminar. The PTC receptor with glass
covering tube, conduction, convection, and radiation comprises three types of heat transfer. Artificial
rawness is added to improve heat transfer, which disrupts and turbulently disturbs flow and thereby
increases a turbulent flow rate. The fluid, geometry, and roughness of the container surfaces are
highly dependent upon this transfer. The study uses three distinct types of artificial roughness, i.e., C,
V-shape, and reverse L-shape. C-shape, V-shape. The research is performed under constant state
conditions by using computational fluid dynamics in the ANSYS CFX software and the CAD model is
built with a Creo model kit. For analyzing i.e., 005 kg/s, 010 kg/s, and 015 kg/s and Nusselt number vs
mass flow curves are called three different mass flow rate considerations. The results have
demonstrated a significant increase in the rate of heat transfer with artificial roughness. With reverse
L artificial roughness, the maximum heat transfer increase is observed.


Keywords


Artificial roughness, Solar energy, Parabolic trough collector, Computational fluid dynamics, C-shape, V-shape, Reverse L-shape.

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References


Siqueira AMdO, Gomes PEN, Torrezani L, Lucas EO, Pereira GMdC. Heat transfer analysis and modeling of a parabolic trough solar collector: an analysis. Energy Procedia. 2014;57:401–10. doi: 10.1016/j.egypro.2014.10.193.

Balghouthi M, Ali ABH, Trabelsi SE, Guizani A. Optical and thermal evaluations of a medium temperature parabolic trough solar collector used in a cooling installation. Energy Convers Manag. 2014;86:1134–46. doi: 10.1016/j.enconman.2014.06.095.

Kizilkan O, Kabul A, Dincer I. Development and performance assessment of a parabolic trough solar collector-based integrated system for an ice-cream factory. Energy. 2016;100:167–76. doi: 10.1016/j.energy.2016.01.098.

Bigoni R, Kötzsch S, Sorlini S, Egli T. Solar water disinfection by a Parabolic Trough Concentrator (PTC): flow-cytometric analysis of bacterial inactivation. J Cleaner Prod. 2014;67:62–71. doi: 10.1016/j.jclepro.2013.12.014.

Boyle G. Renewable energy: power for a sustainable future. 2nd ed. Oxford, UK: Oxford University Press; 2004.

Available from: https://commons.wikimedia.org/wiki/File:Flat_plate_glazed_collector.gif.

Available from: https://energyeducation.ca/encyclopedia/Solar_collector.

Available from: https://www.researchgate.net/publication/343629063_Evacuated_Tube_Solar_Collectors_A_Review.

Available from: https://www.sciencedirect.com/topics/engineering/evacuated-tube-collector.

Available from: https://www.energy.gov/eere/solar/articles/line-focus-solar-collector.

Line focus solar collector; 2015.

Available from: https://en.wikipedia.org/wiki/Solar-powered_Stirling_engine.

Jaramillo OA, Borunda M, Velazquez-Lucho KM, Robles M. Parabolic trough solar collector for low enthalpy processes: an analysis of the efficiency enhancement by using twisted tape inserts. Renew Energy. 2016;93:125–41. doi: 10.1016/j.renene.2016.02.046.

Siqueira AMdO, Gomes PEN, Torrezani L, Lucas EO, Pereira GMdC. Heat transfer analysis and modeling of a parabolic trough solar collector: an analysis. Energy Procedia. 2014;57:401–10. doi: 10.1016/j.egypro.2014.10.193.

Filho VCP, de Sá AB, Passos JC, Colle S. Experimental and numerical analysis of thermal losses of a parabolic trough solar collector. Energy Procedia. 2014;57:381–90. doi: 10.1016/j.egypro.2014.10.191.

Bellos E, Tzivanidis C, Antonopoulos KA, Gkinis G. Thermal enhancement of solar parabolic trough collectors by using nanofluids and converging-diverging absorber tube. Renew Energy. 2016;94:213–22. doi: 10.1016/j.renene.2016.03.062.

Liu Q, Yang M, Lei J, Jin H, Gao Z, Wang Y. Modeling and optimizing parabolic trough solar collector systems using the least squares support vector machine method. Sol Energy. 2012;86(7):1973–80. doi: 10.1016/j.solener.2012.01.026.

Mussard M, Nydal OJ. Influence of solar tracking inaccuracy and sun rays modeling on the efficiency of a small-scale parabolic trough. Energy Procedia. 2014;57:1508–15. doi: 10.1016/j.egypro.2014.10.143.

Khanna S, Sharma V, Singh S, Kedare SB. Explicit expression for temperature distribution of receiver of parabolic trough concentrator considering bimetallic absorber tube. Appl Therm Eng. 2016;103:323–32. doi: 10.1016/j.applthermaleng.2016.04.110.

Fuqiang W, Qingzhi L, Huaizhi H, Jianyu T. Parabolic trough receiver with corrugated tube for improving heat transfer and thermal deformation characteristics. Appl Energy. 2016;164:411–24. doi: 10.1016/j.apenergy.2015.11.084.

Huang Z, Yu GL, Li ZY, Tao WQ. Numerical study on heat transfer enhancement in a receiver tube of parabolic trough solar collector with dimples, protrusions and helical fins. Energy Procedia. 2015;69:1306–16. doi: 10.1016/j.egypro.2015.03.149.

Mwesigye A, Bello-Ochende T, Meyer JP. Multi-objective and thermodynamic optimisation of a parabolic trough receiver with perforated plate inserts. Appl Therm Eng. 2015;77:42–56. doi: 10.1016/j.applthermaleng.2014.12.018.

Wang R, Qu W, Sun J, Hong H. An on-site test method for optical efficiency of large-size parabolic trough collectors. Energy Procedia. 2017;105:486–91. doi: 10.1016/j.egypro.2017.03.345.


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