Development of an integrated solar-fossil powered steam generation system for industrial applications

Das Poster gibt eine kurze Einführung in das Projekt SolSteam, in dem die Integration solaren Prozessdampfes in einen konventionellen Dampferzeuger untersucht wird

The digital layer:alternative data for regional and innovation studies

The lack of large-scale data revealing the interactions amongfirms has constrained empirical studies.Utilizing relational web data has remained unexplored as a remedy for this data problem. Weconstructed a Digital Layer by scraping the inter-firm hyperlinks of 600,000 Germanfirms and linked theDigital Layer with several traditional indicators. We showcase the use of this developed dataset by testingwhether the Digital Layer data can replicate several theoretically motivated and empirically supportedstylized facts. The results show that the intensity and quality offirms’hyperlinks are strongly associatedwith the innovation capabilities offirms and, to a lesser extent, with hyperlink relations to geographicallydistant and cognitively closefirms. Finally, we discuss the implications of the Digital Layer approach foran evidence-based assessment of sectoral and place-based innovation policies

Sharyginite, Ca3TiFe2O8, A New Mineral from the Bellerberg Volcano, Germany

The new mineral sharyginite, Ca3TiFe2O8(P21ma, Z = 2, a = 5.423(2) Å, b = 11.150(8) Å, c = 5.528(2) Å, V = 334.3(3) Å3), a member of the anion deficient perovskite group, was discovered in metacarbonate xenoliths in alkali basalt from the Caspar quarry, Bellerberg volcano, Eifel, Germany. In the holotype specimen, sharyginite is widespread in the contact zone of xenolith with alkali basalt. Sharyginite is associated with fluorellestadite, cuspidine, brownmillerite, rondorfite, larnite and minerals of the chlormayenite-wadalite series. The mineral usually forms flat crystals up to 100 µm in length, which are formed by pinacoids {100}, {010} and {001}. Crystals are flattened on (010). Sharyginite is dark brown, opaque with a brown streak and has a sub-metallic lustre. In reflected light, it is light grey and exhibits rare yellowish-brown internal reflections. The calculated density of sharyginite is 3.943 g·cm-3. The empirical formula calculated on the basis of 8 O apfu is Ca3.00(Fe3+ 1.00Ti4+ 0.86Mn4+ 0.11Zr0.01Cr3+ 0.01Mg0.01)Σ2(Fe3+ 0.76Al0.20Si0.04)Σ1.00O8. The crystal structure of sharyginite, closely related to shulamitite Ca3TiFeAlO8structure, consists of double layers of corner-sharing (Ti, Fe3+) O6octahedra, which are separated by single layers of (Fe3+O4) tetrahedra. We suggest that sharyginite formed after perovskite at high-temperature conditions >1000°C.NC

Design of a Direct-Liquid-Cooled Motor and Operation Strategy for the Cooling System

To make an all-electric aircraft possible, both high power densities and efficiencies are needed. However, particularly high demands are also placed on the thermal management system. Often, the electric motor and cooling system are considered without co-optimization. Particularly in the case of electric motors with conductors directly cooled by a liquid, there is great potential for optimization, since the temperature-dependent Joule losses determine the largest part of the losses. This publication shows the main influencing parameters for the electric motor and cooling system: coolant speed and winding temperature. In addition, the influence of the cooling system control during a flight mission is demonstrated and its potential in mass reduction is quantified. It could be shown that with a low utilized electric motor the maximum winding temperature of 130 (Formula presented.) C is beneficial, the cooling system should work in almost all operation points in its sized operation and the mass of the heat exchanger and pump is negligible compared to the mass of the electric motor and energy storage

Development of a test setup for the characterization of an optical microscope for high precision length metrology applications

A test setup to qualify the performance of optical microscopes has been designed and optimized using FEM calculations to exhibit a minimal susceptibility to thermal and mechanical influences of the ambient environment. The alignment is performed using an alignment autocollimator and alignment targets. The data acquisition of the camera and the position sensors of the stage is synchronized. The short-term repeatability (1s) of the line position and -width measurement obtained with the integrated UV microscope are 1 nm and 0.2 nm respectively. In long-term measurements the maximum lateral and focus drift rate observed were 30- and 20 nm / hour respectively. The measured point spread function contained only radial symmetric optical aberrations. Using the Zernike-Nijboer theory including only the defocus and spherical aberrations, fit residuals were obtained that contain systematic deviations in the order of the noise level

Total VOC reactivity in the planetary boundary layer: 2. A new indicator for determining the sensitivity of the ozone production to VOC and NO

A new indicator is proposed for determining if tropospheric ozone production in a specifiacr eai s limitedb yV OC or NOx.T he indicato1r 9= r•ø•C/•oød•Xes cribeths e ratio of the lifetimes of OH against the losses by reacting with VOC and NOx. Whereas •oøx• c anb e obtainebdy c onventionmale asurementthse, n ewp umpa ndp robeO H approach which is described in part one of this publication makes it now possible to obtain also ß_ov •o c ßI ndicator values above a thresholdv alue of 0.2 __+50 % are representativeo f NOx-saturatedc onditionsw here an increaseo f NOx emissionsc auses lower ozone production.F or valuesb elow 0.01 the ozone productioni s very insensitivet o changeso f VOC emissionsT. he robustnesso f this indicator againsts everalp arameters sucha s temperature,h umidity,p hotolysisa, nd initial ozone concentrationsis tested in a box model and comparedt o the robustnesso f other earlier proposedi ndicators.I n contrast to earlier proposed indicators, this new one is not based on photochemically producedl ong-liveds peciesb ut describest he instantaneousr egime of an air parcel. Three-dimensionasl imulations howst hat this indicator is quite successfuiln estimatingt he impact of increasedo r reducede missionso n the ozone concentrationsfo r each location in the modeling area. This will make it a very helpful tool for developing ozone abatement strategies