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High irradiance low temperature / Florian Feil in EUROPEAN COATINGS JOURNAL (ECJ), N° 10 (10-11/2020)
[article]
Titre : High irradiance low temperature : Temperature control in accelerated outdoor weathering Type de document : texte imprimé Auteurs : Florian Feil, Auteur Année de publication : 2020 Article en page(s) : p. 42-47 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Essais accélérés (technologie)
Miroirs
Rayonnement solaire
Revêtements -- Effets du climat:Peinture -- Effets du climat
Température -- ContrôleIndex. décimale : 667.9 Revêtements et enduits Résumé : Weathering with concentrated solar radiation enables material tests under natural conditions but nevertheless with high acceleration factors. However, high surface temperatures often limit the application. New mirror technologies allow to limit and control the test temperatures. It is also possible to predict the surface temperature based on mirror combination and on sample absorption (colour). Note de contenu : - State of the art
- "Cool-mirror" technology
- Hybrid systems
- Temperature
- Calculation of surface temperatures
- Fig. 1 : Schematic representation of a Fresnel-mirror solar concentration device
- Fig. 2 : Tracking Fresnel-mirror solar concentration device ("EMMAqua", 10 mirrors, with spray nozzles) : target board with test specimen
- Fig. 3 : Tracking mirror device with twenty focused cold mirrors ("UA-EMMA", ultra accelerated-EMMA) and a target area of approximately 15 cm X 91 cm
- Fig. 4 : Tracking mirror device "16 CM UA-EMMAqua-hybrid" with sixteen cold mirrors and 4 traditional mirrors
- Fig. 5 : Spectral reflection of the coloured coated metal panels
- Fig. 6 : Temperature course of a representative day (June 3, 2019) of the surface temperatures of the green samples in all exposures
- Fig. 7 : Maximum temperatures of all samples of all exposures on April 19, 2019
- Fig. 8 : Absolute calculated spectral irradiance at the time of the maximum temperature on May 4, 2019 for all mirror combinations
- Table 1 : Average daily maximum surface temperatures with standard deviation in the measurement period from April 9 to June 19, 2019
- Table 2 : Calculated (cal.) and measured (me.) maximum surface temperatures (April 19, 2019)En ligne : https://drive.google.com/file/d/1OYO7U65aBaXeCVVYLPBbu1iCn_42Nd8E/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34908
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 10 (10-11/2020) . - p. 42-47[article]Réservation
Réserver ce documentWeathering testing of wind turbine rotor blade coatings / Florian Feil in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 204, N° 4595 (04/2014)
[article]
Titre : Weathering testing of wind turbine rotor blade coatings Type de document : texte imprimé Auteurs : Florian Feil, Auteur Année de publication : 2014 Article en page(s) : p. 18-21 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Eoliennes -- Revêtements protecteurs
Essais accélérés (technologie)
Revêtements -- Effets du rayonnement ultraviolet:Peinture -- Effets du rayonnement ultraviolet
Revêtements:Peinture
Structures offshore -- Revêtements protecteursIndex. décimale : 667.9 Revêtements et enduits Résumé : The annual installation of wind power has increased over the past several years. In the European Union new installations went up from 3.2GW in 2000 to 11.2GW in 20131. However, due to the negative impact of market regulatory and political uncertainties, the growth rates have slowed. Since energy cost and availability is a major driving factor, the current industry focus is on both exploring the fields of effective offshore wind turbines, as well as ways to reduce energy costs. The latter can be solved in two ways - by reducing installation costs but also by increasing turbine efficiency.
Rotor blades have always been the most critical part of a windmill as they have a tremendous impact upon the wind mill's functionality and efficiency. Over the years, different materials have been used in man's attempt to utilise wind as an alternative energy resource. Today, reinforced epoxy composites are primarily used as blade matrix for wind turbines.
The rotor blade must withstand multiple stresses including rain, hall, ice, sand, speed, sunlight, etc. To combat these forces, protective coatings are essential. These days, the projected lifetime of a wind turbine is approximately 25 years. Rotor blade coatings have to maintain their properties within this period, even under these harsh conditions. Anything that can be done to avoid premature failure and to reduce repair work and maintenance of the wind turbine decreases the downtime and, thus, increases efficiency and revenue. Therefore, performance testing is critical for both new and aged blade coatings, making accelerated weathering testing an important part of the development and qualification process of rotor blades.Note de contenu : - MODERN ROTOR BLADE COATINGS
- STANDARDS SITUATION : Wheathering testing of wind turbine rotor blade coatings
- WEATHERING AS CLIMATIC CONDITIONING
- LONG LIFETIME, LOW MAINTENANCEEn ligne : https://drive.google.com/file/d/1Ml_yG5Hgd-wDUAt_TNLX4wxWunizGXoc/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21149
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 204, N° 4595 (04/2014) . - p. 18-21[article]Réservation
Réserver ce document