API src

Found 109 results.

Similar terms

s/d2h/P2H/gi

Weiterentwicklung und Erprobung eines Hochtemperaturwärmespeichers mit innovativer Füllkörpertechnologie und Luft als Wärmeträger in der Keramikindustrie, Teilvorhaben: Untersuchung zur Filtration und Zwischenspeicherung hochtemperierter Abwärme zur Nutzung im keramischen Brennprozess

Ziel des Teilprojektes ist die Untersuchung der Möglichkeit zur Nutzung der direkten Abluft aus den Brennprozessen der Comet Schleiftechnik GmbH. Die direkte Nutzung bringt Kostenvorteile, da Wärmeübertrager wegfallen und erhöht das Potential an rückgewonnener Energie, da Verluste durch Wärmeübertrager vermieden werden. Durch die direkte Nutzung der Abluft kann es jedoch über die Zeit zu Ablagerungen von Stäuben oder Kondensaten auf den Leitungen und Speicherkomponenten kommen, die die Performance des Speichers beeinträchtigen. Daher müssen zunächst die Verschmutzungsmechanismen analysiert werden. Im weiteren Verlauf muss die die Spezifikation für das Speichersystem inklusive gegebenenfalls erforderlichem Filtersystem erstellt werden. Darauf basierend koordiniert Comet den Aufbau und die Inbetriebnahme eines Demonstrators. Im laufenden Betrieb untersucht Comet das Potential unterschiedlicher verfahrenstechnischer Betriebsführungen des Demonstrators und der Möglichkeit eines Power-To-Heat Moduls. Abschließend wird die Wirtschaftlichkeit des Gesamtsystems bewertet.

Entwicklung und Monitoring eines Gesamtsystems zur kombinierten regenerativen Versorgung von Gebäuden mit Wärme, Kälte, Strom und Frischluft

Entwicklung und Monitoring eines Gesamtsystems zur kombinierten regenerativen Versorgung von Gebäuden mit Wärme, Kälte, Strom und Frischluft, Teilvorhaben: Entwicklung einer prädikativen Steuerung

Entwicklung und Monitoring eines Gesamtsystems zur kombinierten regenerativen Versorgung von Gebäuden mit Wärme, Kälte, Strom und Frischluft, Teilvorhaben: Entwicklung und Optimierung PCM-Speicher

EnEff:Wärme: Weiterentwicklung und Qualifizierung des multifunktionalen thermischen Speichers für den Einsatz in kommunalen Strom- und Wärmenetzen

Water isotope values from northeastern German lake systems 2020 et seq

Water isotopes (δ2H and δ18O) were analyzed in samples collected in lakes associated to major riverine systems in northeastern Germany throughout 2020. The dataset is derived from water samples taken at a) lake shores (sampled in March and July 2020); b) buoys temporarily installed in deep parts of the lake (sampled monthly from March to October 2020); c) multiple spatially distributed spots in four selected lakes (in September 2020); d) the outflow of Müggelsee (sampled biweekly from March 2020 to January 2021). At shores, water was sampled with a pipette from 40-60 cm below water surface and directly transferred into a measurement vial, while at buoys a Limnos water sampler was used to obtain samples from 1 m below surface. Isotope analysis was conducted at IGB Berlin, using a Picarro L2130-i cavity ring-down spectrometer. The data give information about the seasonal isotope amplitude in the sampled lakes and about spatial isotope variability in different branches of the associated riverine systems.

Mikroprojekt: Machbarkeitsuntersuchung zur Einbindung von Wärmespeichern für eine klimaschonendere Produktion von Wellpappe

Das übergeordnete Thema des Projekts ist die Entwicklung einer klimaschonenderen Wärmeversorgung für die Wellpappenfabrik der Zukunft. Im Mikroprojekt soll die Machbarkeit verschiedener Konzepte zur Wärmeversorgung überprüft und ein Modellprojekt in diesem Themengebiet vorbereitet werden. Ein besonderer Fokus liegt auf der Einbindung von Wärmespeichern in die Wärmeversorgung oder Wärmeverteilung innerhalb des Prozesses. Dabei sollen in der Machbarkeitsstudie drei Ansätze verfolgt werden: (1) Power-to-Heat (kurz P2H), (2) Solarthermie und (3) Nutzbarmachung von Abwärme. Bei allen Konzepten sollen Wärmespeicher jeglicher Art grundlegender Bestandteil sein. Im anschließenden Modellprojekt soll der vielversprechendste Ansatz weiter ausgearbeitet und in Form eines Demonstrationsprojektes in der realen Produktionsumgebung erprobt werden.

Plant wax composition of sediment core ROT21 from the Rotsee, Switzerland

This dataset contains compound-specific hydrogen (δ2H) and carbon (δ13C) isotope compositions and concentrations of long-chain n-alkanes and fatty acids (n-alkanoic acids) from the ROT21 sediment record of Rotsee, Central Switzerland (47°04′10″N, 8°18′48″E, 419 m a.s.l.). Sediment cores were retrieved in October 2021 using a UWITEC gravity corer, and the dataset spans the past ~13,000 years based on 19 radiocarbon dates (terrestrial and aquatic macrofossils) integrated with 210Pb and 137Cs profiles (see De Jonge et al., 2025). Laboratory analyses were conducted between February 2023 and November 2024 at the University of Basel. Sediment samples (~2–5 g) were sub-sampled, freeze-dried, spiked with internal standards (n-C19-alkanoic acid, n-C36-alkane, 2-octadecanone, and n-C21-alkanol), and extracted with dichloromethane/methanol (9:1, v/v) using an Accelerated Solvent Extractor (Dionex ASE 350, Thermo Fisher Scientific). Following saponification, neutral fractions were separated via silica gel chromatography, and fatty acids were converted to fatty acid methyl esters (FAMEs). Both n-alkanes and FAMEs were further purified to isolate saturated compounds using AgNO3-impregnated silica gel columns, then analyzed and quantified by gas chromatography with flame ionization detection (GC-FID). Peak areas were normalized to recovery standards to account for potential losses during sample handling, and compounds were identified by comparison with external standards. Compound-specific δ2H and δ13C values were determined by gas chromatography-isotope ratio mass spectrometry (GC-IRMS) and normalized to the VSMOW-SLAP (δ2H) and VPDB (δ13C) scales. Analytical precision was ±3-5 ‰ for δ2H and ±0.2–0.3 ‰ for δ13C. The dataset was generated to reconstruct past hydroclimate and vegetation dynamics in Central Europe using plant wax δ2H records. Full methodological details are provided in the study: Central Europe hydroclimate since the Younger Dryas inferred from vegetation-corrected sedimentary plant wax δ2H values (Santos et al., 2026).

Water isotope time series (March 2020 - March 2021) of samples collected along the Zingster Bodden chain

Time series of stable isotopes (δ2H and δ18O) were analyzed in water samples collected at the Zingster Bodden chain in biweekly to monthly intervals between March 2020 and March 2021. Herefore, a Limnos sampler was used to obtain water from 0.5 to 1 m below surface. In the laboratory, a WTW 1970i conductivity meter and TetraCon 325 measuring cell were used to analyse electrical conductivity. Sub-samples were transferred into measurement vials before isotope analysis was conducted at IGB Berlin, using a Picarro L2130-i cavity ring-down spectrometer. Water chemical parameters were measured with regularly calibrated WTW multiparameter devices. The data give information about the seasonal isotope amplitude at the sampled locations and about spatial variability along the transects.

Water isotope values from estuarine systems along the German Baltic Sea coast

Stable isotopes (δ²H and δ¹⁸O) were analyzed in water samples collected at the German Baltic Sea Coast. Transect samples were taken in June 2019, March 2020, and July 2021 at 68 spots along the Schlei, the Zingster Bodden chain, and the Rügener and Greifswalder Boddens. Additionally, at selected spots time series were sampled in biweekly to monthly intervals between March 2020 and March 2021. At shores, water was sampled with a pipette from 0.3 to 0.6 m below water surface and directly transferred into a measurement vial. In deeper parts of the boddens a Limnos sampler was used to obtain water from 0.5 to 1 m below surface. Isotope analysis was conducted at IGB Berlin, using a Picarro L2130-i cavity ring-down spectrometer. The measurement uncertainty was quantified by error propagation, including the parameters a) uncertainties of lab standards; b) errors of standard calibration; c) average standard deviation of replicate measurements. Based on this, measurement uncertainty was estimated to account 0.16 ‰ for δ¹⁸O and 0.57 ‰ for δ²H. Water chemical parameters were measured with WTW measurement devices. The data give information about a) the seasonal isotope amplitude at the sampled locations; b) spatial variability along the transects, and c) the correlation between isotopes and water chemical parameters.

1 2 3 4 5 … 9 10 11