Polymer films in photovoltaic modules: Analysis and modeling of permeation processes (2009)
Köhl, M., Angeles-Palacios, O., Philipp, D.
Polymeric films are commonly used as water-vapor barriers, or as substrate materials for barrier coatings in food packaging, photovoltaic devices, organic light emitting diodes (OLEDs), and vacuum...
sustainable forest management: review and synthesis * (2008)
M. Tomé, R. E. Mcroberts, J. K. Vanclay, V. Lemay, B. Guan, G. Gertner, ...
Potential contributions of statistics and modelling to
Optimisation of the micro-climate in solar collectors (2007)
Köhl, M., Kübler, V., Heck, M.
Flat collectors are usually not air or water tight. Therefore, they can exchange air and moisture with the environment. Moisture can accumulate in the collector, especially when the thermal...
Orel, B., Spreizer, H., Perse, L.S., Fir, M., Vuk, A.S., Merlini, D., ...
The objective of this study was to make paints having a variety of colours and whose spectral selectivity would be independent of the thickness of the deposited layer of paint (thickness insensitive...
Orel, B., Spreizer, H., Vuk, A.S., Fir, M., Merlini, D., Vodlan, M., ...
Red, green and blue paints were prepared for use as thickness insensitive spectrally selective (TISS) paint coatings for solar façade absorbers. The paints were composed of a polyurethane resin...
Towards a European Forest Information System (2007)
Schuck, A., Green, T., Andrienko, G., Andrienko, N., Andrienko, A.F., Requardt, A., ...
Over the past two decades various European forest information projects have had the vision to build a distributed Europe forest information network, in which existing data can be identified and made...
Temperature gradients in components and devices cause mechanical strain and stress. They are a main reason for failure or even breakdown of the components, especially if these loads occur...
Polymer films in photovoltaic modules: analysis and modelling of permeation processes (2007)
Köhl, M., Daniel, P., Angeles O.
Polymer materials are used as water vapour barriers or encapsulation materials for photovoltaic modules. Their permeation properties determine the amount of water in the polymers and inside the...
Investigation of surface temperatures (2007)
Heck, M., Köhl, M., Philipp, D., Schlieper, J.
The solar irradiance heats surfaces exposed to the sun. The temperature depends on the optical properties, the thermal properties of the materials and their geometry. Moreover the ambient climate...
Thermischer Kunststoffkollektor mit eingeschobenem Absorberkoerper (2007)
Köhl, M., Weiss, K., Müller, A., Franke, H.
DE 102007041267 A1 UPAB: 20090403 NOVELTY - The collector has a base body made of partially transparent plastic material e.g. extruded plastic material, transparent polymer material and transparent...
Nijnatten, P.A. Van, Hutchins, M.G., Kilbey, N.B., Roos, A., Gelin, K., Geotti-Bianchini, F., ...
The emissivity of coated glazing is commonly determined from spectral reflectance measurements using a specular reflectance accessory or other suitable reflectance attachment. As part of the ongoing...
Cavity QED Detection of Interfering Matter Waves (2005)
Bourdel, T., Donner, T., Ritter, S., Öttl, A., Köhl, M., Esslinger, T.
We observe the build-up of a matter wave interference pattern from single atom detection events in a double-slit experiment. The interference arises from two overlapping atom laser beams extracted...
Observing the Profile of an Atom Laser Beam (2005)
Köhl, M., Busch, Th., Molmer, K., Hänsch, T. W., Esslinger, T.
We report on an investigation of the beam profile of an atom laser extracted from a magnetically trapped $^{87}$Rb Bose-Einstein condensate. The transverse momentum distribution is magnified by a...
Development of innovative insulation systems on the basis of vacuum insulation panels (2005)
Platzer, W., Stramm, C., Amberg-Schwab, S., Köhl, M.
Within an ongoing project between the Fraunhofer Society and German Manufacturers new components for vacuum insulation panels (VIPs) are in development. Alternative approaches for high barrier films...
Durability of polymeric glazing materials for solar applications (2005)
Köhl, M., Jorgensen, G., Brunold, S., Carlsson, B., Heck, M., Möller, K.
Results of durability testing of antireflective glazing (2005)
Gombert, A., Heck, M., Kübler, V., Köhl, M., Carlsson, B., Möller, K., ...
Superfluid to Mott insulator transition in one, two, and three dimensions (2004)
Köhl, M., Moritz, H., Stöferle, T., Schori, C., Esslinger, T.
We have created one-, two-, and three-dimensional quantum gases and study the superfluid to Mott insulator transition. Measurements of the transition using Bragg spectroscopy show that the excitation...
Durability of polymeric glazing materials for solar applications (2004)
Jorgensen, G., Brunold, S., Carlsson, B., Heck, M., Köhl, M., Möller, K.
Assessment of service life of solar thermal components by accelerated life testing (2004)
Carlsson, B., Möller, K., Köhl, M., Heck, M., Brunold, S., Marechal, J., ...
Advanced procedure for the assessment of the lifetime of solar absorber coatings (2004)
Köhl, M., Heck, M., Brunold, S., Frei, U., Carlsson, B., Möller, K.
New solar absorber coatings are developed and used in advanced collector designs with improved efficiency. The operation temperature and stagnation temperature as the main durability load for the...
Carlsson, B., Möller, K., Köhl, M., Heck, M., Brunold, S., Frei, U., ...
Lebensdauerabschätzung bei Belastungen, die von Eigenschaften des Prüflings abhängen (2003)
Köhl, M., Heck, M., Brunold, S., Frei, U., Carlsson, B., Möller, K.
Solarabsorberschichten dienen der Wandlung von Sonnenenergie in Wärme. Maßgeblich für deren Effizienz und die erreichbaren Maximaltemperaturen sind die optischen Eigenschaften der Beschichtung:...
Durability of polymeric glazing materials for solar applications (2003)
Köhl, M., Heck, M., Jorgensen, G., Brunold, S., Carlsson, B., Möller, K.
Assessment of service life of solar thermal components by accelerated life testing (2003)
Köhl, M., Heck, M., Möller, K., Brunold, S., Jorgensen, G., ...
Köhl, M., Heck, M., Carlsson, B., Möller, K., Brunold, S., ...
Advanced procedure for the assessments of the lifetime of solar absorber coatings (2003)
Köhl, M., Heck, M., Brunold, S., Frei, U., Carlsson, B., Möller, K.
New solar absorber coatings are developed and used in advanced collector designs with improved efficiency. The operation temperature as well as the stagnation temperature as the main durability load...
Solar collector design with respect to moisture problems (2003)
Holck, O., Svendsen, S., Brunold, S., Frei, U., Köhl, M., Heck, M., ...
Lebensdauerabschätzung bei Belastungen, die von Eigenschaften des Prüflings abhängen (2003)
Köhl, M., Heck, M., Brunold, S., Frei, U., Carlsson, B., Möller, K.
Solarabsorberschichten dienen der Wandlung von Sonnenenergie in Wärme. Maßgeblich für deren Effizienz und die erreichbaren Maximaltemperaturen sind die optischen Eigenschaften der Beschichtung:...
Advanced procedure for the assessments of the lifetime of solar absorber coatings (2003)
Köhl, M., Heck, M., Brunold, S., Frei, U., Carlsson, B., Möller, K.
New solar absorber coatings are developed and used in advanced collector designs with improved efficiency. The operation temperature as well as the stagnation temperature as the main durability load...
On the transverse mode of an atom laser (2001)
Busch, Th., Köhl, M., Esslinger, T., Molmer, K.
The transverse mode of an atom laser beam that is outcoupled from a Bose-Einstein condensate is investigated and is found to be strongly determined by the mean--field interaction of the laser beam...
Growth of Bose-Einstein Condensates from Thermal Vapor (2001)
Köhl, M., Davis, M. J., Gardiner, C. W., Hänsch, T. W., Esslinger, T.
We report on a quantitative study of the growth process of $^{87}$Rb Bose-Einstein condensates. By continuous evaporative cooling we directly control the thermal cloud from which the condensate...
Materials in solar thermal collectors (2000)
Köhl, M., Heck, M., Möller, K., Carlsson, B., Brunold, S., Frei, U., ...
Development of large area sputtered solar absorber coatings (1996)
Graf, W., Brucker, F., Köhl, M., Tröscher, T., Wittwer, V., Blessing, R., ...
Development and production of large area sputtered solar absorber coatings (1995)
Graf, W., Brucker, F., Köhl, M., Tröscher, T., Wittwer, V., Blessing, R., ...
Depolarization effects in ellipsometric measurements of thick layers (1995)
Forcht, K., Joerger, R., Gombert, A., Köhl, M., Graf, W.
Ellipsometry is a powerful technique for the determination of complex refractive indices n=n+ik of thin absorbing films deposited on a substrate. If the films are deposited onto an opaque substrate,...
Application of advanced methods for durability assessment of new absorber coatings (1995)
Frei, U., Brunold, S., Köhl, M., Brucker, F., Carlsson, B., Möller, K.
Analysis of the morphology and the optical properties of sputtered molybdenum particles (1995)
Joerger, R., Forcht, K., Gombert, A., Graf, W., Heinzel, A., Köhl, M., ...
Analyse der Morphologie und der optischen Eigenschaften von gesputterten Molybdänpartikeln (1995)
Joerger, R., Forcht, K., Gombert, A., Graf, W., Heinzel, A., Köhl, M., ...
Herstellung selektiver Solarabsorberschichten für plane Absorber mittels Sputtertechnik (1994)
Köhl, M., Brucker, F., Graf, W., Wittwer, V., Blessing, R., Herlitze, L.
Round robin test results on the temperature stability of a black chrome coating (1990)
Möller, K., Carlsson, B., Frei, U., Dolley, P.R., Hutchins, M.G., Nijnatten, P.A., ...
As part of Task X in the Solar Heating and Cooling Programme of the International Energy Agency, methods for the lifetime assessment of solar absorber coatings have been investigated. In a first...
Zur Optimierung von Cermet-Solarabsorberschichten (1990)
Durch die beschriebenen Arbeiten konnte gezeigt werden, daß bei aufgedampften Cermets unabhängig von den optischen Eigenschaften der Komponenten durch stetige Verminderung des Metallgehalts von...
Carlsson, B., Frei, U., Dolley, P.R., Hutchins, M.G., Gindele, K., Nijnatten, P.A., ...
Results are presented of a round-robin programme of optical properties measurements carried out on a commercial chemically oxidised stainless steel spectrally selective solar absorber surface and two...
Optical properties and thermal stability of Al/Al2O3 cermet solar absorbers (1990)
A mixture of dispersed metal in a dielectric matrix, a so-called cermet, offers the possibility of tailoring the refractive index. Combined with a reflector on the back side, an interference coating...
Die beschriebenen Prüfverfahren sind zur Untersuchung von Anfälligkeiten von Solarabsorbern gegen einzelne Degradationsfaktoren wie Temperatur, Feuchte und Kondensation, oder Schwefeldioxid sehr...
Towards More Rigorous Assessment of Biodiversity
Vanclay, Jerome K, Bachmann, P., Köhl, M., Päivinen, R.
Biodiversity is often ill-defined and subjectively surveyed, resulting in inefficient and ambiguous estimates. Strengths and deficiencies of prevailing survey techniques are appraised through a...