000195688 001__ 195688
000195688 005__ 20180913062320.0
000195688 037__ $$aCONF 000195688 245__$$aEnergy-Efficient Sol-Gel Process for Production of Nanocomposite Absorber Coatings for Tubular Solar Thermal Collectors
000195688 269__ $$a2013 000195688 260__$$aLausanne, Switzerland$$bEPFL Solar Energy and Building Physics Laboratory (LESO-PB)$$c2013
000195688 336__ $$aConference Papers 000195688 520__$$aThe energy efficiency of production processes for components of solar energy systems is an important issue. Other factors which are important for the production of products such as black selective solar coatings include production speed, cycle time and homogeneity of the coating, as well as the minimization of the quantity of the needed chemical precursors. In this paper a new energy efficient production process is presented for production of optically selective coatings for solar thermal absorbers. The latter should ideally behave as a black body, absorbing a maximum of the incoming solar radiation, while minimizing energy losses by infrared radiation, acting as an infrared mirror. The used method to produce such coatings is sol-gel dip-coating. The optical and morphological properties of the Cu-Co-Mn-Si-O based triple layer have been characterized by spectrophotometry, electron microscopy and time of flight secondary electron microscopy. After optimization of the multilayer design, a solar absorptance of 0.95 and a thermal emissivity of 0.12 at 100°C have been achieved. The intermediate Cu-Co-Mn-Si-O layer was analyzed by high resolution transmission electron microscopy. The likewise obtained images show an agglomeration of crystalline grains with 10-20nm in diameter. Therefore, we can consider that the Cu-Co-Mn-Si-O phase is nanocrystalline. In order to roughly estimate the corrosion resistance of the coating in an acidic environment, a simple corrosion test in harsh conditions was designed. With respect to a commercially available durable black chrome coating, this test of corrosion resistance confirmed the durability of the novel sol-gel coating in an acidic environment. Moreover, the excellent stability at elevated temperatures in ambient air makes the coating an interesting candidate for solar applications involving concentrated solar radiation, such as the generation of solar electricity (concentrated solar power), industrial process heating and solar cooling. For that reason, prototype coatings consisting of stacks of three individual layers were deposited on 2 meter long stainless steel tubes.
000195688 6531_ $$aselective solar absorber coatings 000195688 6531_$$ananocrystalline spinel
000195688 6531_ $$ainduction heating 000195688 6531_$$areceiver tubes for concentrated solar power (CSP)
000195688 700__ $$0242612$$aJoly, Martin$$g179180 000195688 700__$$aAntonetti, Yann
000195688 700__ $$aPython, Martin 000195688 700__$$0250288$$aGonzalez, Marina$$g265744
000195688 700__ $$0244862$$aGascou, Thomas$$g160603 000195688 700__$$0242214$$aHessler, Aïcha$$g104267
000195688 700__ $$0241357$$aSchueler, Andreas$$g146273 000195688 7112_$$aCISBAT 2013$$cLausanne, Switzerland$$dSeptember 4-6, 2013
000195688 720_1 $$0240706$$aScartezzini, Jean-Louis$$eed.$$g106368
000195688 773__ $$jI$$q11-16$$tProceedings of CISBAT 2013 Cleantech for Smart Cities and Buildings 000195688 8564_$$uhttps://infoscience.epfl.ch/record/190600$$xPUBLIC$$zURL
000195688 8564_ $$s730286$$uhttps://infoscience.epfl.ch/record/195688/files/1_joly.pdf$$yn/a$$zn/a
000195688 909C0 $$0252072$$pLESO-PB
000195688 909C0 $$0252025$$pCIME
000195688 909CO $$ooai:infoscience.tind.io:195688$$pSB$$pconf$$pENAC
000195688 917Z8 $$x106442 000195688 937__$$aEPFL-CONF-195688
000195688 973__ $$aEPFL$$rNON-REVIEWED$$sPUBLISHED 000195688 980__$$aCONF