Concept

Trompe à eau

Publications associées (8)

Numerical investigation of the jet velocity profile and its influence on the Pelton turbine performance

François Avellan, Ebrahim Jahanbakhsh, Audrey Paulette Solange Maertens, Sebastián Camilo Leguizamón Sarmiento, Siamak Alimirzazadeh, Takashi Kumashiro

Numerical investigation of the unsteady flow patterns around the bucket can be helpful to improve the Pelton turbine efficiency. In fact, by studying the loss mechanisms in the flow, one can optimize the bucket design. For this purpose, an accurate investi ...

IOP PUBLISHING LTD2019

Multi-Temperature Heat Pumps - A Literature Review

Jürg Alexander Schiffmann

Reducing primary energy consumption by utilizing heat recovery systems has become increasingly important in industry. In many sectors, heating and cooling is required at different temperature levels at the same time. For this purpose, heat pumps are highly ...

2016

Solar fuel processing efficiency for ceria redox cycling using alternative oxygen partial pressure reduction methods

Sophia Haussener, Meng Lin

Solar-driven non-stoichiometric thermochemical redox cycling of ceria for the conversion of solar energy into fuels shows promise in achieving high solar-to-fuel efficiency. This efficiency is significantly affected by the operating conditions, e.g. redox ...

Pergamon-Elsevier Science Ltd2015

Improved Two-Side AC Electroosmotic Micropump

Nico de Rooij, Luca Ribetto

This paper reports on the fabrication and experimental characterisation of improved design AC eletroosmotic micropumps. Since the first study and analysis of AC electroosmosis by Ramos et al. [1], many devices have been fabricated and tested [2]. The basic ...

2011

Analysis and Prevention of Vortex Breakdown in the Simplified Discharge Cone of a Francis Turbine

François Avellan, Vlad Hasmatuchi

We perform a numerical analysis of the decelerated swirling flow into the discharge cone of a model Francis turbine operated at variable discharge and constant head, using an axisymmetric turbulent swirling flow model and a corresponding simplified computa ...

American Society of Mechanical Engineers2010

Handling technology of mega-watt millimeter-waves for optimized heating of fusion plasmas

Olivier Sauter, Timothy Goodman, Federico Alberto Alfredo Felici

Millimeter-wave components were re-examined for high power (Mega-Watt) and steady- state (greater than one hour) operation. Some millimeter-wave components, including waveguide joints, vacuum pumping sections, power monitors, sliding waveguides, and inject ...

International Microwave Power Institute2009

Qualitative evaluation of alkali release during the pyrolysis of biomass

Christian Ludwig, Alexander Wokaun

The thermochemical emission of alkali metals from biomass samples and two organic salts was investigated for the first time using a novel combination of a th ermogravi metric analyzer with a jet flow condenser attached to a surface ionization detector. Thi ...

2007

Chlorosulfonic acid

Albert Renken

High-purity HSO3Cl is prepd. at a high space-time yield by mixing and reacting gaseous HCl with SO3 dissolved in ClSO3H, contg. 0.3-1.4% SO3 at 70-100 Deg in a venturi tube at 1-1.1 mol HCl/mol SO3. Thus, into the throat of a vertical venturi tube was fed ...

(Hoechst A.-G., Fed. Rep. Ger.).1979

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