Qualification test procedure for solar absorber surface durability

Carlsson, Bo; Möller, Kenneth; Köhl, Michael; Frei, Ulrich; Brunold, S

doi:10.1016/s0927-0248(99)00111-7

Cited by 86 publications

(31 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…-Silane-treated-pigment TSSS paints (stpTSSS) produced according to a recently disclosed procedure are the first Task-X-certified 26 , organic, spectrally selective coatings. They have now entered industrial production on a major European producer's solar absorber surfaces coil-coating line.…”

Section: Discussionmentioning

confidence: 99%

The Impact of a Silane Pigment Treatment on the Properties of Thickness-sensitive Spectrally Selective Paints

Steinbücher

Venturini

Hafner

et al. 2017

ACSi

View full text Add to dashboard Cite

Thickness-sensitive, spectrally selective paints based on a silane treatment of pigments were prepared with different pigment-volume concentrations. The critical pigment-volume concentration was determined by means of electrochemical impedance spectroscopy, while the pigment particle size distribution was determined with ultrasound spectroscopy. The selectivity versus thickness relation of a paint with a near-critical pigment-volume concentration was studied spectroscopically through performance criteria. Its nonlinearity was shown to be related to the surface topography. This relation was further supported by hydrophobicity measurements. Heat-gathering tests in a simulated solar collector supported the spectroscopic determination of an optimal dry-film thickness.

show abstract

Section: Discussionmentioning

confidence: 99%

The Impact of a Silane Pigment Treatment on the Properties of Thickness-sensitive Spectrally Selective Paints

Steinbücher

Venturini

Hafner

et al. 2017

ACSi

View full text Add to dashboard Cite

show abstract

“…In order to rate the spectral selectivity and hence the performance of a solar absorber we use the expression α-0.5ɛ in this study to reflect the weight factor of thermal emittance in a more reasonable matter. This expression was first recommended in a report of the IEA solar heating and cooling program Task 27 [20], and has been employed in the newly issued international standard ISO 22975-3: absorber surface durability [21].…”

Section: Optical Characterizationmentioning

confidence: 99%

Electrophoretically deposited carbon nanotube spectrally selective solar absorbers

Chen

Boström

2016

Solar Energy Materials and Solar Cells

View full text Add to dashboard Cite

Three types of carbon nanotubes (CNT) have been investigated regarding their suitability as spectrally selective solar thermal absorbers. The CNT coatings were electrophoretically deposited on aluminum substrates using kinetically stable CNT aqueous suspensions, of which two CNT aqueous suspensions (N-CNT and P-CNT suspensions) were prepared as part of this study and the third one (T-CNT suspension) was purchased. The CNT suspension systems are simple and consist of only CNTs, DI water and a cathodic surfactant. Heat treated CNT coatings are visibly uniform. The CNT coating thickness, surface morphology and reflectance of CNT absorbers were characterized by White Light Interferometry, Scanning Electron Microscopy and Spectrophotometry, respectively. T-CNT absorber achieved a solar absorptance α of 0.79 and a thermal emittance ε of 0.14. N-and P-CNT absorbers achieved better spectral selectivity, with α=0.90 and ε=0.14 for N-CNT absorber, α=0.90 and ε=0.13 for P-CNT absorber. The effect of CNT coating thickness, deposition parameters and peak heat treatment temperature on the spectral selectivity were studied. For these CNT suspension systems, the thickness and the heat treatment peak temperature are the key factors to achieving a good spectral selectivity.

show abstract

“…The accelerated thermal durability test was conducted using an oven furnace based on the PC (performance criterion) value of IEA SHC Task 27 [30] while the adhesion effectiveness between the film absorber and substrate was evaluated by the physical/cracking inspection before and after thermal test. The PC value is defined as the following equation:…”

Section: Characterizationsmentioning

confidence: 99%

“…Δε 100 is the difference of emittance values (where the emittance values were measured at the blackbody radiation standard of 100°C) before and after the thermal test [30]. In this test, the initial α S and T values of the coatings were determined before the thermal test, and they became the basis to establish the temperature (T 1 ) applied in the thermal test.…”

Section: Characterizationsmentioning

confidence: 99%

“…This is because the real application of a selective absorber is strictly insulated under a transparent glass cover; therefore the thermal behavior became the essential factor determining the quality of the absorber film. The International Energy Agency (IEA) developed an accelerated thermal durability test to assess the thermal collector performance called performance criterion (PC) through the IEA SHC Task 27 [30]. This test procedure assumes that the activation energy of a certain degradation process is sufficient to ensure absorber durability under natural working conditions of a flat thermal collector [36].…”

Section: Accelerated Thermal Durability Testmentioning

confidence: 99%

See 1 more Smart Citation

Optical properties and thermal durability of copper cobalt oxide thin film coatings with integrated silica antireflection layer

Amri

Jiang

Wyatt

et al. 2014

Ceramics International

View full text Add to dashboard Cite

Optical properties and thermal durability of copper cobalt oxide thin film coatings with integrated silica antireflection layer, Ceramics International, http://dx.doi.org/10.1016/j. ceramint. 2014.08.012 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting galley proof before it is published in its final citable form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. antireflection (AR) layer have been deposited on the top of aluminum substrates using a simple sol-gel dip-coating method. Reflectance spectra of the coatings were generated using spectroscopic methods while the coatings were subjected to an accelerated thermal durability test. The addition of silica changed the reflectance spectra of coatings within the wavelength range of 0.3-15.4 µm. The absorptance decreased with the increase of the withdrawal rate in range of 10-40 mm/min, while the emittance increased with the increase of the withdrawal rate. The optimum optical parameters for this study were absorptance, α S = 84.96%; emittance, ε T = 5.63% corresponding to the coating with a silica AR layer at withdrawal rate of 10 mm/min. The coatings with the silica AR layer were shown to be thermally durable in which no discernible 'cracking' phenomenon was observed. The degradation of the coatings with the silica AR layer was predominantly governed by temperature changes rather than exposure time.

show abstract

Qualification test procedure for solar absorber surface durability

Cited by 86 publications

References 8 publications

The Impact of a Silane Pigment Treatment on the Properties of Thickness-sensitive Spectrally Selective Paints

The Impact of a Silane Pigment Treatment on the Properties of Thickness-sensitive Spectrally Selective Paints

Electrophoretically deposited carbon nanotube spectrally selective solar absorbers

Optical properties and thermal durability of copper cobalt oxide thin film coatings with integrated silica antireflection layer

Contact Info

Product

Resources

About