Springer Nature is making SARS-CoV-2 and COVID-19 research free. View research | View latest news | Sign up for updates

Thermal selective coatings and its enhancement characteristics for efficient power generation through parabolic trough collector (PTC)

  • 47 Accesses


World climate is an area of concern due to the use of fossil fuels that have been the most commonly preferred resource of energy since the industrial revolution and urbanization. The target to maintain the lowest level of carbon emissions and greenhouse gases has created an urge to look for renewable energy resources. Among the renewable energy resources available worldwide, solar energy is considered as one of the feasible and mature technologies in view of large-scale commercial deployment. Solar photovoltaic and solar thermal conversion (STC) techniques have been implemented so far and are still advancing towards cost-effective solutions. Parabolic trough collector (PTC) is one such economical and feasible STC technology as far as high-temperature thermal applications are concerned and are being widely used for power generation. This paper is an attempt to present the current scenario of PTC technology along with its various advancements over the years. Further in this paper, selective coatings, coating techniques and heat collection element (HCE) or receiver are discussed in detail with regard to their advancements. The present work also illustrates the progressive trends in PTC technology, particularly with respect to various heat transfer fluids, HCE inserts, selective coatings and other performance factors along with some futuristic aspects with respect to coatings and receiver inserts in view of high thermal performance.

Graphic abstract

This is a preview of subscription content, log in to check access.

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8
Fig. 9
Fig. 10
Fig. 11
Fig. 12



Atomic force microscopy


Computational fluid dynamics


Concentrating solar power


Chemical vapour deposition


Differential scanning calorimetry


Direct steam generation


Elastic recoil detection


Energy-dispersive X-ray analysis


Fourier transform infrared spectroscopy


Finite volume method


Greenhouse gases


Heat collection element


Heat transfer fluid


Indirect steam generation


Levelized cost of energy


Monte Carlo ray trace


Multi-walled carbon nanotubes




Parabolic trough collector


Scanning electron microscopy


Solar photovoltaic


Solar thermal conversion


Transmission electron microscopy


Thermogravimetric analysis


Ultraviolet visible spectrometry


X-ray diffraction

\(\psi_{j}\) :

Optical thickness of layer

ϕ j :

Angle of refraction

\(u_{j}\) :

Effective refractive index

\(\Delta \varepsilon\) :

Influencing factor of core material

f* :

Ratio of inner volume of sphere to whole volume of sphere

n j :

Refractive index

fA and fB :

Value fraction or filling factor

\(\varepsilon_{A}\) and \(\varepsilon_{B}\) :

Dielectric constants

Z1 and Z2 :

No. of configurations


Maxwell Garnett


Ping Sheng






  1. Abutayeh M, Addad Y, Abu-Nada E, Alazzam A (2019) Doping solar field heat transfer fluid with nanoparticles. J Sol Energy Eng 141(1):011013

  2. Adachi H, Wasa K (2012) Thin films and nanomaterials, handbook of sputter deposition technology: fundamentals and applications for functional thin films, nano-materials and MEMS vol 1

  3. Alguacil M, Prieto C, Rodriguez A, Lohr J (2014) Direct steam generation in parabolic trough collectors. Energy Procedia 49:21–29

  4. Almanza R, Lentz A, Jimenez G (1997) Receiver behavior in direct steam generation with parabolic troughs. Sol Energy 61(4):275–278

  5. AL-Rjoub A, Rebouta L, Costa P, Cunha N, Lanceros-Mendez S, Barradas N, Alves E (2019) The effect of increasing Si content in the absorber layers (CrAlSiNx/CrAlSiOyNx) of solar selective absorbers upon their selectivity and thermal stability. Appl Surf Sci 481:1096–1102

  6. Ambrosini A, Lambert TN, Boubault A, Hunt A, Davis DJ, Adams D, Hall AC (2015) Thermal stability of oxide-based solar selective coatings for CSP central receivers. In: ASME 2015 9th international conference on energy sustainability collocated with the ASME 2015 power conference, the ASME 2015 13th international conference on fuel cell science, engineering and technology, and the ASME 2015 nuclear forum, V001T05A022–V001T05A022

  7. Atchuta S, Sakthivel S, Barshilia HC (2019) Transition metal based CuxNiyCoz-x-yO4 spinel composite solar selective absorber coatings for concentrated solar thermal applications. Sol Energy Mater Sol Cells 189:226–232

  8. Atkinson C, Sansom CL, Almond HJ, Shaw CP (2015) Coatings for concentrating solar systems-a review. Renew Sustain Energy Rev 45:113–122

  9. Bellos E, Tzivanidis C, Antonopoulos K, Gkinis G (2016) Thermal enhancement of solar parabolic trough collectors by using nanofluids and converging-diverging absorber tube. Renew Energy 94:213–222

  10. Bigiani L, Maccato C, Gasparotto A, Sada C, Barreca D (2019) Structure and properties of Mn3O4 thin films grown on single crystal substrates by chemical vapor deposition. Mater Chem Phys 223:591–596

  11. Bovard BG (1988) Derivation of a matrix describing a rugate dielectric thin film. Appl Opt 27(10):1998–2005

  12. Bovard BG (1993) Rugate filter theory: an overview. Appl Opt 32(28):5427–5442

  13. Cao F, McEnaney K, Chen G, Ren Z (2014) A review of cermet-based spectrally selective solar absorbers. Energy Environ Sci 7(5):1615–1627

  14. Cespedes E, Wirz M, Sanchez-Garcia J, Alvarez-Fraga L, Escobar-Galindo R, Prieto C (2014) Novel Mo–Si3N4 based selective coating for high temperature concentrating solar power applications. Sol Energy Mater Sol Cells 122:217–225

  15. Cespedes E, Rodriguez-Palomo A, Salas-Colera E, Fonda E, Jimenez-Villacorta F, Vila M, de Andres A, Prieto C (2018) Role of Al2O3 antireflective layer on the exceptional durability of Mo–Si–N-based spectrally selective coatings in air at high temperature. ACS Appl Energy Mater 1(11):6152–6160

  16. Chamberlin R, Skarman J (1966) Chemical spray deposition process for inorganic films. J Electrochem Soc 113(1):86–89

  17. Chandrashekara M, Yadav A (2017) An experimental study of the effect of exfoliated graphite solar coating with a sensible heat storage and Scheffler dish for desalination. Appl Therm Eng 123:111–122

  18. Cheng Z, He Y, Cui F, Xu R, Tao Y (2012) Numerical simulation of a parabolic trough solar collector with nonuniform solar flux conditions by coupling FVM and MCRT method. Sol Energy 86(6):1770–1784

  19. Cheng J, Wang C, Wang W, Du X, Liu Y, Xue Y, Wang T, Chen B (2013) Improvement of thermal stability in the solar selective absorbing Mo-Al2O3 coating. Sol Energy Mater Sol Cells 109:204–208

  20. Chopra K, Reddy G (1986) Optically selective coatings. Pramana 27(1–2):193–217

  21. Coccia G, Di Nicola G, Colla L, Fedele L, Scattolini M (2016) Adoption of nanofluids in low-enthalpy parabolic trough solar collectors: numerical simulation of the yearly yield. Energy Convers Manag 118:306–319

  22. Conrado LS, Rodriguez-Pulido A, Calderón G (2017) Thermal performance of parabolic trough solar collectors. Renew Sustain Energy Rev 67:1345–1359

  23. Dan A, Biswas A, Sarkar P, Kashyap S, Chattopadhyay K, Barshilia HC, Basu B (2018) Enhancing spectrally selective response of W/WAlN/WAlON/Al2O3-Based nanostructured multilayer absorber coating through graded optical constants. Sol Energy Mater Sol Cells 176:157–166

  24. Dias D, Rebouta L, Costa P, Al-Rjoub A, Benelmeki M, Tavares C, Barradas N, Alves E, Santilli P, Pischow K (2017) Optical and structural analysis of solar selective absorbing coatings based on AlSiOx: W cermets. Sol Energy 150:335–344

  25. Dobrowolski J (1965) Completely automatic synthesis of optical thin film systems. Appl Opt 4(8):937–946

  26. Elam JW, Mane AU, Yanguas-gil A, Libera JA (2017) Refractory solar selective coatings. U.S. patent application 15/017, 548

  27. El-Mahallawy N, Atia MR, Khaled A, Shoeib M (2018) Design and simulation of different multilayer solar selective coatings for solar thermal applications. Mater Res Express 5(4):046402

  28. Esposito S, Antonaia A, Addonizio M, Aprea S (2009) Fabrication and optimisation of highly efficient cermet-based spectrally selective coatings for high operating temperature. Thin Solid Films 517(21):6000–6006

  29. Fleury V, Watters WA, Allam L, Devers T (2002) Rapid electroplating of insulators. Nature 416(6882):716

  30. Flores V, Almanza R (2004) Behavior of the compound wall copper-steel receiver with stratified two-phase flow regimen in transient states when solar irradiance is arriving on one side of receiver. Sol Energy 76(1–3):195–198

  31. Freeman J, Hellgardt K, Markides CN (2015) An assessment of solar-powered organic Rankine cycle systems for combined heating and power in UK domestic applications. Appl Energy 138:605–620

  32. Fuqiang W, Zhexiang T, Xiangtao G, Jianyu T, Huaizhi H, Bingxi L (2016) Heat transfer performance enhancement and thermal strain restrain of tube receiver for parabolic trough solar collector by using asymmetric outward convex corrugated tube. Energy 114:275–292

  33. Fuqiang W, Ziming C, Jianyu T, Yuan Y, Yong S, Linhua L (2017) Progress in concentrated solar power technology with parabolic trough collector system: a comprehensive review. Renew Sustain Energy Rev 79:1314–1328

  34. Gao XH, Qiu XL, Li X-T, Theiss W, Chen B-H, Guo H-X, Zhou T-H, Liu G (2019) Structure, thermal stability and optical simulation of ZrB2 based spectrally selective solar absorber coatings. Sol Energy Mater Sol Cells 193:178–183

  35. Garnett JM (1904) XII. Colours in metal glasses and in metallic films. Philos Trans R Soc Lond Ser A Contain Pap Math Phys Character 203(359–371):385–420

  36. Ghasemi SE, Ranjbar AA (2017) Numerical thermal study on effect of porous rings on performance of solar parabolic trough collector. Appl Therm Eng 118:807–816

  37. Giglio A, Lanzini A, Leone P, Garcia MMR, Moya EZ (2017) Direct steam generation in parabolic-trough collectors: a review about the technology and a thermo-economic analysis of a hybrid system. Renew Sustain Energy Rev 74:453–473

  38. Gong X, Wang F, Wang H, Tan J, Lai Q, Han H (2017) Heat transfer enhancement analysis of tube receiver for parabolic trough solar collector with pin fin arrays inserting. Sol Energy 144:185–202

  39. Guo S, Chu Y, Liu D, Chen X, Xu C, Coimbra CF, Zhou L, Liu Q (2017) The dynamic behavior of once-through direct steam generation parabolic trough solar collector row under moving shadow conditions. J Sol Energy Eng 139(4):041002

  40. Hachicha AA, Rodriguez I, Ghenai C et al (2018) Thermo-hydraulic analysis and numerical simulation of a parabolic trough solar collector for direct steam generation. Appl Energy 214(C):152–165

  41. Hans K, Latha S, Bera P, Barshilia HC (2018) Hafnium carbide based solar absorber coatings with high spectral selectivity. Sol Energy Mater Sol Cells 185:1–7

  42. Hassani S, Saidur R, Mekhilef S, Hepbasli A (2015) A new correlation for predicting the thermal conductivity of nanofluids; using dimensional analysis. Int J Heat Mass Transf 90:121–130

  43. Heras I, Guillen E, Lungwitz F, Rincon-Llorente G, Munnik F, Schumann E, Azkona I, Krause M, Escobar-Galindo R (2018) Design of high-temperature solar-selective coatings based on aluminium titanium oxynitrides AlyTi1-y(OxN1–x). Part 1: advanced microstructural characterization and optical simulation. Sol Energy Mater Sol Cells 176:81–92

  44. Hernandez-Pinilla D, Rodriguez-Palomo A, Alvarez-Fraga L, Cespedes E, Prieto J, Muñoz-Martin A, Prieto C (2016) MoSi2–Si3N4 absorber for high temperature solar selective coating. Sol Energy Mater Sol Cells 152:141–146

  45. Irvine T Jr, Hartnett J, Eckert E (1958) Solar collector surfaces with wavelength selective radiation characteristics. Sol Energy 2(3–4):12–16

  46. Islam MT, Huda N, Abdullah A, Saidur R (2018) A comprehensive review of state-of-the-art concentrating solar power (CSP) technologies: current status and research trends. Renew Sustain Energy Rev 91:987–1018

  47. Kasaeian A, Daviran S, Azarian RD, Rashidi A (2015) Performance evaluation and nanofluid using capability study of a solar parabolic trough collector. Energy Convers Manag 89:368–375

  48. Khelifa A, Soum-Glaude A, Khamlich S, Glenat H, Balghouthi M, Guizani A, Maaza M, Dimassi W (2019) Optical simulation, characterization and thermal stability of Cr2O3/Cr/Cr2O3 multilayer solar selective absorber coatings. J Alloy Compd 783:533–544

  49. Kumar A, Prakash O, Kaviti AK (2017) A comprehensive review of Scheffler solar collector. Renew Sustain Energy Rev 77:890–898

  50. Lampert CM (1979) Coatings for enhanced photothermal energy collection I. Selective absorbers. Solar Energy Mater 1(5–6):319–341

  51. Levy F (2016) Film growth and epitaxy: methods. In: Reference module in materials science and materials engineering. https://doi.org/10.1016/B978-0-12-803581-8.01012-2

  52. Li H, He Y, Liu Z, Huang Y, Jiang B (2017a) Synchronous steam generation and heat collection in a broadband Ag–TiO2 core-shell nanoparticle-based receiver. Appl Therm Eng 121:617–627

  53. Li Q, Tehrani SSM, Taylor RA (2017b) Techno-economic analysis of a concentrating solar collector with built-in shell and tube latent heat thermal energy storage. Energy 121:220–237

  54. Liu Y, Wang C, Xue Y (2012) The spectral properties and thermal stability of NbTiON solar selective absorbing coating. Sol Energy Mater Sol Cells 96:131–136

  55. Liu H, Yang B, Mao M, Liu Y, Chen Y, Cai Y, Fu D, Ren F, Wan Q, Hu X (2020) Enhanced thermal stability of solar selective absorber based on nano-multilayered TiAlON films deposited by cathodic arc evaporation. Appl Surf Sci 501:144025

  56. Manikandan G, Iniyan S, Goic R (2019) Enhancing the optical and thermal efficiency of a parabolic trough collector-a review. Appl Energy 235:1524–1540

  57. McDonald GE (1975) Spectral reflectance properties of black chrome for use as a solar selective coating. Sol Energy 17(2):119–122

  58. Meng J, Guo R, Li H, Zhao L, Liu X, Li Z (2018) Microstructure and thermal stability of Cu/Zr0. 3Al0. 7 N/Zr0. 2Al0. 8 N/Al34O60N6 cermet-based solar selective absorbing coatings. Appl Surf Sci 440:932–938

  59. Munoz J, Abanades A (2011) Analysis of internal helically finned tubes for parabolic trough design by CFD tools. Appl Energy 88(11):4139–4149

  60. Mwesigye A, Huan Z, Meyer JP (2016) Thermal performance and entropy generation analysis of a high concentration ratio parabolic trough solar collector with Cu-Therminol VP-1 nanofluid. Energy Convers Manag 120:449–465

  61. Nunes C, Teixeira V, Collares-Pereira M, Monteiro A, Roman E, Martin-Gago J (2002) Deposition of PVD solar absorber coatings for high-efficiency thermal collectors. Vacuum 67(3–4):623–627

  62. Odeh S, Morrison G, Behnia M (1998) Modelling of parabolic trough direct steam generation solar collectors. Sol Energy 62(6):395–406

  63. Osorio JD, Rivera-Alvarez A (2019) Performance analysis of parabolic trough collectors with double glass envelope. Renew Energy 130:1092–1107

  64. Ouagued M, Khellaf A, Loukarfi L (2013) Estimation of the temperature, heat gain and heat loss by solar parabolic trough collector under Algerian climate using different thermal oils. Energy Convers Manag 75:191–201

  65. Pakkala A, Putkonen M (2010) Atomic layer deposition. In: Handbook of deposition technologies for films and coatings. William Andrew Publishing, pp 364–391

  66. Pakzad E, Ranjbar Z, Ghahari M (2019) Synthesized of octahedral cupper chromite spinel for spectrally selective absorber (SSA) coatings. Prog Org Coat 132:21–28

  67. Peterson R, Ramsey J (1975) Thin film coatings in solar- thermal power systems. J Vac Sci Technol 12(1):174–181

  68. Philibert C (2010) Technology roadmap: concentrating solar power. Organisation for Economic Co-operation and Development/International Energy Agency

  69. Powell KM, Rashid K, Ellingwood K, Tuttle J, Iverson BD (2017) Hybrid concentrated solar thermal power systems: a review. Renew Sustain Energy Rev 80:215–237

  70. Price H, Lupfert E, Kearney D, Zarza E, Cohen G, Gee R, Mahoney R (2002) Advances in parabolic trough solar power technology. J Sol Energy Eng 124(2):109–125

  71. Qiu Y, Li M-J, He Y-L, Tao W-Q (2017) Thermal performance analysis of a parabolic trough solar collector using supercritical CO2 as heat transfer fluid under non-uniform solar flux. Appl Therm Eng 115:1255–1265

  72. Qiu X-L, Gao X-H, Zhou T-H, Chen B-H, Lu J-Z, Guo H-X, Li X-T, Liu G (2019) Structure, thermal stability and chromaticity investigation of TiB2 based high temperature solar selective absorbing coatings. Sol Energy 181:88–94

  73. Qu M, Archer D.H, Yin H (2009) A linear parabolic trough solar collector performance model. In: ASME 2007 energy sustainability conference. American Society of Mechanical Engineers Digital Collection, pp 663–670

  74. Macias JD, Herrera-Zamora DM, Lizama-Tzec FI, Bante-Guerra J, Ares-Muzio OE, Oskam G, Rubio HR-P, Alvarado-Gil JJ, Arancibia-Bulnes C, Ramos-Sanchez V, et al. (2017) Optical and thermal properties of selective absorber coatings under CSP conditions. In: AIP conference proceedings, p 120001

  75. Reddy K, Kumar KR, Ajay C (2015) Experimental investigation of porous disc enhanced receiver for solar parabolic trough collector. Renew Energy 77:308–319

  76. Rodriguez-Palomo A, Cespedes E, Hernandez-Pinilla D, Prieto C (2018) High-temperature air-stable solar selective coating based on MoSi2–Si3N4 composite. Sol Energy Mater Sol Cells 174:50–55

  77. Rubin EB, Chen Y, Chen R (2019) Optical properties and thermal stability of Cu spinel oxide nanoparticle solar absorber coatings. Sol Energy Mater Sol Cells 195:81–88

  78. Ruppin R (1978) Validity range of the Maxwell–Garnett theory. Physica Status Solidi 87(2):619–624

  79. Sadati SS, Qureshi FU, Baker D (2015) Energetic and economic performance analyses of photovoltaic, parabolic trough collector and wind energy systems for Multan, Pakistan. Renew Sustain Energy Rev 47:844–855

  80. Saito T, Iba R, Ono S, Imada G, Yasui K (2019) Growth characteristics of ZnO thin films produced via catalytic reaction-assisted chemical vapor deposition. J Vac Sci Technol A Vac Surf Films 37(3):030904

  81. Seeley J, Liddell HM, Chen T (1973) Extraction of Tschebysheff design data for the lowpass dielectric multilayer. Opt Acta Int J Opt 20(8):641–661

  82. Selvakumar N, Barshilia HC, Rajam K, Biswas A (2010) Structure, optical properties and thermal stability of pulsed sputter deposited high temperature HfOx/Mo/HfO2 solar selective absorbers. Sol Energy Mater Sol Cells 94(8):1412–1420

  83. Selvakumar P, Somasundaram P, Thangavel P (2014) Performance study on evacuated tube solar collector using therminol D-12 as heat transfer fluid coupled with parabolic trough. Energy Convers Manag 85:505–510

  84. Sest E, Dravzivc G, Genorio B, Jerman I (2018) Graphene nanoplatelets as an anticorrosion additive for solar absorber coatings. Sol Energy Mater Sol Cells 176:19–29

  85. Shaheed AA, Radhi RM, Abbood MH (2018) Design, construction, and testing of a parabolic trough solar concentrator system for hot water and moderate temperature steam generation. Kufa J Eng 9(1):42–59

  86. Sheng P (1980) Pair-cluster theory for the dielectric constant of composite media. Phys Rev B 22(12):6364

  87. Sokhansefat T, Kasaeian A, Kowsary F (2014) Heat transfer enhancement in parabolic trough collector tube using Al2O3/synthetic oil nanofluid. Renew Sustain Energy Rev 33:636–644

  88. Sonawane PD, Bupesh Raja V (2018) An overview of concentrated solar energy and its applications. Int J Ambient Energy 39(8):898–903

  89. Subramani J, Nagarajan P, Mahian O, Sathyamurthy R (2018) Efficiency and heat transfer improvements in a parabolic trough solar collector using TiO2 nanofluids under turbulent flow regime. Renew Energy 119:19–31

  90. Suriwong T, Bunmephiphit C, Wamae W, Banthuek S (2018) Influence of Ni–Al coating thickness on spectral selectivity and thermal performance of parabolic trough collector. Mater Renew Sustain Energy 7(3):14

  91. Tabor H (1958) Solar energy research: program in the new desert research institute in Beersheba. Sol Energy 2(1):3–6

  92. Tian Y, Zhao CY (2013) A review of solar collectors and thermal energy storage in solar thermal applications. Appl Energy 104:538–553

  93. Wamae W, Suriwong T, Threrujirapapong T (2018) Influence of tin content on spectral selectivity and thermal conductivity of Sn–Al2O3 solar selective absorber. Mater Renew Sustain Energy 7(1):2

  94. Wang X, Yu X, Fu S, Lee E, Kekalo K, Liu J (2018) Design and optimization of nanoparticle-pigmented solar selective absorber coatings for high-temperature concentrating solar thermal systems. J Appl Phys 123(3):033104

  95. Xu X, Dehghani G, Ning J, Li P (2018) Basic properties of eutectic chloride salts NaCl–KCl–ZnCl2 and NaCl–KCl–MgCl2 as HTFs and thermal storage media measured using simultaneous DSC-TGA. Sol Energy 162:431–441

  96. Yang Y (2012) The study of nanostructured solar selective coatings. Doctoral dissertation, University of York

  97. Yasinskiy A, Navas J, Aguilar T, Alcántara R, Gallardo JJ, Sanchez-Coronilla A, Martin EI, De Los Santos D, Fernandez-Lorenzo C (2018) Dramatically enhanced thermal properties for TiO2-based nanofluids for being used as heat transfer fluids in concentrating solar power plants. Renew Energy 119:809–819

  98. Yue S, Yueyan S, Fengchun W (2003) High-temperature optical properties and stability of AlxOy-AlNx-Al solar selective absorbing surface prepared by DC magnetron reactive sputtering. Sol Energy Mater Sol Cells 77(4):393–403

  99. Zarza E, Valenzuela L, Leon J, Hennecke K, Eck M, Weyers HD, Eickhoff M (2004) Direct steam generation in parabolic troughs: final results and conclusions of the DISS project. Energy 29(5–6):635–644

  100. Zhang HL, Baeyens J, Degreve J, Caceres G (2013) Concentrated solar power plants: review and design methodology. Renew Sustain Energy Rev 22(2):466–481

  101. Zhang P, Cheng J, Jin Y, An X (2018) Evaluation of thermal physical properties of molten nitrate salts with low melting temperature. Solar Energy Materials and Solar Cells 176:36–41

  102. Zhao S (2007) Spectrally selective solar absorbing coatings prepared by Dc magnetron sputtering. Doctoral dissertation, Acta Universitatis Upsaliensis

Download references


The authors acknowledge the language editing and technical editing for grammar errors support received from Dr. Anurag Kumar, Assistant Professor, School of Languages and Literature, SMVD University and Dr. Garima Gupta, Assistant Professor, Department of English, University of Jammu, J & K.

Author information

Correspondence to S. Anand.

Ethics declarations

Conflict of interest Statement

The author(s) declare(s) that there is no conflict of interest.

Additional information

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Rights and permissions

Reprints and Permissions

About this article

Verify currency and authenticity via CrossMark

Cite this article

Thappa, S., Chauhan, A., Sawhney, A. et al. Thermal selective coatings and its enhancement characteristics for efficient power generation through parabolic trough collector (PTC). Clean Techn Environ Policy (2020). https://doi.org/10.1007/s10098-020-01820-3

Download citation


  • Heat collection element (HCE)
  • Heat transfer fluid (HTF)
  • Parabolic trough collector (PTC)
  • Selective coatings