Zobrazeno 1 - 10
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pro vyhledávání: '"Bernd Stoffel"'
Autor:
em. Dr.-Ing Bernd Stoffel
Assessing the Energy Efficiency of Pumps and Pump Units, developed in cooperation with Europump, is the first book available providing the background, methodology, and assessment tools for understanding and calculating energy efficiency for pumps and
Publikováno v:
Experimental Thermal and Fluid Science. 32:882-891
A study of the influence of the inlet boundary condition on simulation results is presented. Experimental measurements and simulations of the flow over a hydrofoil in a closed circuit cavitation tunnel were performed. Using the LDA method the velocit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::034f3300d1743e49e547acb69090c2f3
https://doi.org/10.1016/j.expthermflusci.2007.10.008
https://doi.org/10.1016/j.expthermflusci.2007.10.008
Publikováno v:
European Journal of Mechanics - B/Fluids. 26:688-705
Cavitation on two-dimensional hydrofoils with swept leading edges always displays some 3-dimensional effects. It is well known that the cavity closure on such hydrofoil is not perpendicular to the channel walls, but is curved in a distinctive pattern
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8a68f6db5ece7002d571c7a85989bc9f
https://doi.org/10.1016/j.euromechflu.2007.01.001
https://doi.org/10.1016/j.euromechflu.2007.01.001
Autor:
Sven König, Bernd Stoffel
Publikováno v:
Journal of Fluids Engineering. 129:1468-1477
A comprehensive investigation was carried out using two different experimental setups: A 1.5-stage axial turbine and a simplified model, a “spoked-wheel” setup with a rotating wake generator consisting of cylindrical bars. The second stator of th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a6c086f9f930744c32a8849fceff2f33
https://doi.org/10.1115/1.2799523
https://doi.org/10.1115/1.2799523
Autor:
Bernd Stoffel
Various technical standards are concerned with the efficiency of electric motors for fixed-speed operation or of motors combined with frequency converters (CDMs) to power drive systems for variable-speed operation. Both can serve as drives for pumps.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::23bd0d30650e35334cbcc841e1bca7b4
https://doi.org/10.1016/b978-0-08-100597-2.00002-1
https://doi.org/10.1016/b978-0-08-100597-2.00002-1
Autor:
Bernd Stoffel
Europump is involved in various activities that aim at assessing the energy efficiency of pumps and pump units. A first step was a voluntary agreement concerning the efficiency related classification of circulators. To support EU activities regarding
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c98c0fb3a01113b316fd10af40a89e2a
https://doi.org/10.1016/b978-0-08-100597-2.00003-3
https://doi.org/10.1016/b978-0-08-100597-2.00003-3
Autor:
Bernd Stoffel
Performance quantities, especially the efficiency, of individual technical products that are produced in series show some scatter around the respective mean values of the size they belong to. The scatter of performance quantities is quantified by per
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4966459e530a34758ff766b0568c31de
https://doi.org/10.1016/b978-0-08-100597-2.00006-9
https://doi.org/10.1016/b978-0-08-100597-2.00006-9
Autor:
Bernd Stoffel
The Energy Efficiency Index (EEI) is well suited for assessing the energy efficiency of complete configurations consisting of pumps and electric drives. The definition of the EEI takes into account characteristic modes of operation. Fundamental influ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e84bb1b2b22a3f2ef1f6cbbb1ad54062
https://doi.org/10.1016/b978-0-08-100597-2.00008-2
https://doi.org/10.1016/b978-0-08-100597-2.00008-2
Autor:
Bernd Stoffel
The Minimum Efficiency Index (MEI) is an efficiency indicator specially introduced and defined for pumps. Besides the efficiency at the best efficiency point (BEP), two additional efficiency values at specified part-load and overload points are incor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c70d9bbad099ff05e2bda3a37d17b994
https://doi.org/10.1016/b978-0-08-100597-2.00007-0
https://doi.org/10.1016/b978-0-08-100597-2.00007-0
Autor:
Bernd Stoffel
The pump efficiency ηBEP at the point of best efficiency (BEP) is determined by the total energy losses that arise in a pump. These total losses originate from various individual losses of different physical nature. Of particular importance are thro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::50fe4e9ab6e383579a17195b26cbb528
https://doi.org/10.1016/b978-0-08-100597-2.00004-5
https://doi.org/10.1016/b978-0-08-100597-2.00004-5