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Effect of pore size and porosity distribution on radiation absorption and thermal performance of porous solar energy absorber

  • Tao XieEmail author
  • KaiDi Xu
  • BoLun Yang
  • YaLing He
Article
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Abstract

In this paper, experimental and numerical study were both conducted to investigate the effect of pore size and porosity distribution on radiation absorption and thermal performance of porous solar energy absorber. Ultraviolet-visible-near infrared (UV-Vis-NIR) spectrophotometer was used to measure the transmittance of porous media to reflect its radiation absorption capabilities. Numerical model was established based on the assumption of thermal nonequilibrium condition as well as using P1 model to consider the radiation heat transfer. The UV-Vis-NIR spectrophotometer measurement showed that: (1) With smaller pore size, the spectral transmittance of the porous media would be lower and the solar radiation absorption would be better; (2) Among the materials with different pore size distributions, pore-size-decreased combo and pore-size-increased combo have almost equal absorption coefficient which are higher than that of uniform structure. Numerical simulation demonstrated that: (3) For materials with different pore size distributions, pore-size-decreased structure has the best radiation absorption due to its ability of maximizing the volumetric absorption effect, which is agreed with the UV-Vis-NIR spectrophotometer experimental results; (4) For materials with different porosity distributions, porosity-gradually-increased structure has the highest mean fluid/solid temperatures because it can utilize the enhanced convective/conductive heat transfer to improve the overall thermal performance of porous receiver; (5) Porous structure with pore-size-decreased distribution and porosity-gradually-increased distribution has the best thermal performance of which the mean temperatures of fluid/solid phases are the highest among all the studied cases.

Keywords

solar energy porous receiver thermal performance pore size distribution porosity distribution 

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References

  1. 1.
    He Y L, Xiao J, Cheng Z D, et al. A MCRT and FVM coupled simulation method for energy conversion process in parabolic trough solar collector. Renew Energy, 2011, 36: 976–985CrossRefGoogle Scholar
  2. 2.
    Cheng Z D, He Y L, Xiao J, et al. Three-dimensional numerical study of heat transfer characteristics in the receiver tube of parabolic trough solar collector. Int Commun Heat Mass Transfer, 2010, 37: 782–787CrossRefGoogle Scholar
  3. 3.
    Agrafiotis C, Roeb M, Sattler C. A review on solar thermal syngas production via redox pair-based water/carbon dioxide splitting thermochemical cycles. Renew Sustain Energy Rev, 2015, 42: 254–285CrossRefGoogle Scholar
  4. 4.
    Li L, Sun J, Li Y. Thermal load and bending analysis of heat collection element of direct-steam-generation parabolic-trough solar power plant. Appl Thermal Eng, 2017, 127: 1530–1542CrossRefGoogle Scholar
  5. 5.
    Li L, Sun J, Li Y, et al. Transient characteristics of a parabolic trough direct-steam-generation process. Renew Energy, 2019, 135: 800–810CrossRefGoogle Scholar
  6. 6.
    Wei X, Lu Z, Yu W, et al. A new code for the design and analysis of the heliostat field layout for power tower system. Sol Energy, 2010, 84: 685–690CrossRefGoogle Scholar
  7. 7.
    Noone C J, Torrilhon M, Mitsos A. Heliostat field optimization: A new computationally efficient model and biomimetic layout. Sol Energy, 2012, 86: 792–803CrossRefGoogle Scholar
  8. 8.
    Prakash M, Kedare S B, Nayak J K. Investigations on heat losses from a solar cavity receiver. Sol Energy, 2009, 83: 157–170CrossRefGoogle Scholar
  9. 9.
    Wu S Y, Xiao L, Li Y R. Effect of aperture position and size on natural convection heat loss of a solar heat-pipe receiver. Appl Thermal Eng, 2011, 31: 2787–2796CrossRefGoogle Scholar
  10. 10.
    Wang K, He Y L, Qiu Y, et al. A novel integrated simulation approach couples MCRT and Gebhart methods to simulate solar radiation transfer in a solar power tower system with a cavity receiver. Renew Energy, 2016, 89: 93–107CrossRefGoogle Scholar
  11. 11.
    Wang K, He Y L. Thermodynamic analysis and optimization of a molten salt solar power tower integrated with a recompression supercritical CO2 Brayton cycle based on integrated modeling. Energy Convers Manage, 2017, 135: 336–350CrossRefGoogle Scholar
  12. 12.
    He Y L, Cheng Z D, Cui F Q, et al. Numerical investigations on a pressurized volumetric receiver: Solar concentrating and collecting modelling. Renew Energy, 2012, 44: 368–379CrossRefGoogle Scholar
  13. 13.
    Cheng Z D, He Y L, Cui F Q. A new modelling method and unified code with MCRT for concentrating solar collectors and its applications. Appl Energy, 2013, 101: 686–698CrossRefGoogle Scholar
  14. 14.
    Loutzenhiser P G, Steinfeld A. Solar syngas production from CO2 and H2O in a two-step thermochemical cycle via Zn/ZnO redox reactions: Thermodynamic cycle analysis. Int J Hydrogen Energy, 2011, 36: 12141–12147CrossRefGoogle Scholar
  15. 15.
    Kodama T, Koyanagi T, Shimizu T, et al. CO2 reforming of methane in a Molten Carbonate salt bath for use in solar thermochemical processes. Energy Fuels, 2001, 15: 60–65CrossRefGoogle Scholar
  16. 16.
    Buck R, Muir J F, Hogan R E. Carbon dioxide reforming of methane in a solar volumetric receiver/reactor: the CAESAR project. Sol Energy Mater, 1991, 24: 449–463CrossRefGoogle Scholar
  17. 17.
    Kodama T, Kondoh Y, Kiyama A, et al. Hydrogen production by solar thermochemical water-splitting/methane-reforming process. In: Proceedings of the ASME 2003 International Solar Energy Conference. Hawaii, 2003. 121–128Google Scholar
  18. 18.
    Kodama T, Kiyama A, Moriyama T, et al. Solar methane reforming using a new type of catalytically-activated metallic foam absorber. J Sol Energy Eng, 2004, 126: 808–1002CrossRefGoogle Scholar
  19. 19.
    Zheng Z J, He Y, He Y L, et al. Numerical optimization of catalyst configurations in a solar parabolic trough receiver-reactor with nonuniform heat flux. Sol Energy, 2015, 122: 113–125CrossRefGoogle Scholar
  20. 20.
    Kodama T, Kiyama A, Shimizu K I. Catalytically activated metal foam absorber for light-to-chemical energy conversion via solar reforming of methane. Energy Fuels, 2003, 17: 13–17CrossRefGoogle Scholar
  21. 21.
    Gokon N, Osawa Y, Nakazawa D, et al. Kinetics of CO2 reforming of methane by catalytically activated metallic foam absorber for solar receiver-reactors. Int J Hydrogen Energy, 2009, 34: 1787–1800CrossRefGoogle Scholar
  22. 22.
    Sang L X, Sun B, Li Y X, et al. Catalytically active absorber in solar reforming of methane. Prog Chem, 2011, 23: 2233–2239Google Scholar
  23. 23.
    Chen X, Xia X, Dong X, et al. Integrated analysis on the volumetric absorption characteristics and optical performance for a porous media receiver. Energy Convers Manage, 2015, 105: 562–569CrossRefGoogle Scholar
  24. 24.
    Roldân M I, Smirnova O, Fend T, et al. Thermal analysis and design of a volumetric solar absorber depending on the porosity. Renew Energy, 2014, 62: 116–128CrossRefGoogle Scholar
  25. 25.
    Sacadura J F, Baillis D. Experimental characterization of thermal radiation properties of dispersed media. Int J Thermal Sci, 2002, 41: 699–707CrossRefGoogle Scholar
  26. 26.
    Baillis D, Arduini-Schuster M, Sacadura J F. Identification of spectral radiative properties of polyurethane foam from hemispherical and bidirectional transmittance and reflectance measurements. J Quantitative Spectr Radiative Transfer, 2002, 73: 297–306CrossRefGoogle Scholar
  27. 27.
    Li Y, Xia X L, Sun C, et al. Tomography-based radiative transfer analysis of an open-cell foam made of semitransparent alumina ceramics. Sol Energy Mater Sol Cells, 2018, 188: 164–176CrossRefGoogle Scholar
  28. 28.
    Li Y, Xia X L, Sun C, et al. Tomography-based analysis of apparent directional spectral emissivity of high-porosity nickel foams. Int J Heat Mass Transfer, 2018, 118: 402–415CrossRefGoogle Scholar
  29. 29.
    Li Y, Xia X L, Sun C, et al. Volumetric radiative properties of irregular open-cell foams made from semitransparent absorbing-scattering media. J Quantitative Spectr Radiative Transfer, 2019, 224: 325–342CrossRefGoogle Scholar
  30. 30.
    Fluent A. Fluent 14.0 User’s Guide. Canonsburg: ANSYS FLUENT Inc, 2011Google Scholar
  31. 31.
    Wu Z, Caliot C, Bai F, et al. Experimental and numerical studies of the pressure drop in ceramic foams for volumetric solar receiver applications. Appl Energy, 2010, 87: 504–513CrossRefGoogle Scholar
  32. 32.
    Chen X, Xia X L, Yan X W, et al. Heat transfer analysis of a volumetric solar receiver with composite porous structure. Energy Convers Manage, 2017, 136: 262–269CrossRefGoogle Scholar
  33. 33.
    Wu Z, Caliot C, Flamant G, et al. Numerical simulation of convective heat transfer between air flow and ceramic foams to optimise volumetric solar air receiver performances. Int J Heat Mass Transfer, 2011, 54: 1527–1537CrossRefzbMATHGoogle Scholar
  34. 34.
    Romero M, Steinfeld A. Concentrating solar thermal power and thermochemical fuels. Energy Environ Sci, 2012, 5: 9234CrossRefGoogle Scholar
  35. 35.
    Buie D, Dey C J, Bosi S. The effective size of the solar cone for solar concentrating systems. Sol Energy, 2003, 74: 417–427CrossRefGoogle Scholar
  36. 36.
    Herrero R, Victoria M, Domínguez C, et al. Concentration photovoltaic optical system irradiance distribution measurements and its effect on multi-junction solar cells. Prog Photovolt-Res Appl, 2012, 20: 423–430CrossRefGoogle Scholar
  37. 37.
    Wang F, Shuai Y, Wang Z, et al. Thermal and chemical reaction performance analyses of steam methane reforming in porous media solar thermochemical reactor. Int J Hydrogen Energy, 2014, 39: 718–730CrossRefGoogle Scholar
  38. 38.
    Zeng J, Xuan Y, Duan H. Tin-silica-silver composite nanoparticles for medium-to-high temperature volumetric absorption solar collectors. Sol Energy Mater Sol Cells, 2016, 157: 930–936CrossRefGoogle Scholar

Copyright information

© Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Institute of Industrial Catalysis, School of Chemical Engineering and TechnologyXi’an Jiaotong UniversityXi’anChina
  2. 2.Key Laboratory of Thermo-Fluid Science and Engineering of Ministry of EducationXi’an Jiaotong UniversityXi’anChina

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