The Experts below are selected from a list of 201 Experts worldwide ranked by ideXlab platform
Sylvie Lorente - One of the best experts on this subject based on the ideXlab platform.
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Distributed energy storage: Time-dependent tree flow design
Journal of Applied Physics, 2016Co-Authors: A. Bejan, S. Ziaei, Sylvie LorenteAbstract:This article proposes "distributed energy storage" as a basic design problem of distributing energy storage material on an area. The energy flows by fluid flow from a concentRated source to points (users) distributed equidistantly on the area. The flow is time-dependent. Several scenarios are analyzed: sensible-heat storage, latent-heat storage, exergy storage vs energy storage, and the distribution of a finite supply of heat transfer surface between the source fluid and the distributed storage material. The chief conclusion is that the finite amount of storage material should be distributed proportionally with the distribution of the flow Rate of Heating agent arriving on the area. The total time needed by the source stream to "invade" the area is cumulative (the sum of the storage times required at each storage site) and depends on the energy distribution paths and the sequence in which the users are served by the source stream. Directions for future designs of distributed storage and retrieval are outlined in the concluding section
A. Bejan - One of the best experts on this subject based on the ideXlab platform.
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Distributed energy storage: Time-dependent tree flow design
Journal of Applied Physics, 2016Co-Authors: A. Bejan, S. Ziaei, Sylvie LorenteAbstract:This article proposes "distributed energy storage" as a basic design problem of distributing energy storage material on an area. The energy flows by fluid flow from a concentRated source to points (users) distributed equidistantly on the area. The flow is time-dependent. Several scenarios are analyzed: sensible-heat storage, latent-heat storage, exergy storage vs energy storage, and the distribution of a finite supply of heat transfer surface between the source fluid and the distributed storage material. The chief conclusion is that the finite amount of storage material should be distributed proportionally with the distribution of the flow Rate of Heating agent arriving on the area. The total time needed by the source stream to "invade" the area is cumulative (the sum of the storage times required at each storage site) and depends on the energy distribution paths and the sequence in which the users are served by the source stream. Directions for future designs of distributed storage and retrieval are outlined in the concluding section
S. Ziaei - One of the best experts on this subject based on the ideXlab platform.
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Distributed energy storage: Time-dependent tree flow design
Journal of Applied Physics, 2016Co-Authors: A. Bejan, S. Ziaei, Sylvie LorenteAbstract:This article proposes "distributed energy storage" as a basic design problem of distributing energy storage material on an area. The energy flows by fluid flow from a concentRated source to points (users) distributed equidistantly on the area. The flow is time-dependent. Several scenarios are analyzed: sensible-heat storage, latent-heat storage, exergy storage vs energy storage, and the distribution of a finite supply of heat transfer surface between the source fluid and the distributed storage material. The chief conclusion is that the finite amount of storage material should be distributed proportionally with the distribution of the flow Rate of Heating agent arriving on the area. The total time needed by the source stream to "invade" the area is cumulative (the sum of the storage times required at each storage site) and depends on the energy distribution paths and the sequence in which the users are served by the source stream. Directions for future designs of distributed storage and retrieval are outlined in the concluding section
B.j. Jarosz - One of the best experts on this subject based on the ideXlab platform.
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Rate of Heating In Tissue In Vitro By Intersitial Ultrasound
[1990] Proceedings of the Twelfth Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 1Co-Authors: B.j. JaroszAbstract:C.W. 1.0 MHz ultrasound hwerthermia in tissue iri was used to produce vitro employing an Aerstitial applicator. It consists of planar piezoelectric transducer with a GI9 hypodermic needle attached to the transducer via multisection conical velocity transformer. Clinically required temperature elevation of 6.5 - 8.5 "C was achieved at about 1.0 W acoustic power from the transducer. Rates of Heating of 1.1 - 1.4 "C/niin were obtained from initial linear increase of temperature with time. Observed Heating Rates were compared with Rates calculated from theoretically developed fonnula. Calculated results were about two orders of magnitude lower than the experimental Heating Rates when a typical value of attenuation coefficient for longitudinal wave in tissues was used. It is suggested that the discrepancy might be removed once viscosity effects in tissues are taken into consideration. The effects require a use of attenuation coefficient with a shear coinponent in it.
F. M. Salem - One of the best experts on this subject based on the ideXlab platform.
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Rate of Heating and sintering temperature effect on the electrical properties of Nd ferrite
Journal of Materials Science, 2003Co-Authors: M.a. Ahmed, Ebtesam E. Ateia, S.i. El-dek, F. M. SalemAbstract:The real part of the dielectric constant (e′) and the dielectric loss angle (tan δ) as well as the ac conductivity of ferrite Mg1+xTixNdyFe2−2x−yO4 0.1 ≤ x ≤ 0.9 at fixed Nd concentration of 0.025 were measured at different temperatures as a function of frequencies. The variation of activation energy as a function of the applied frequency was reported. The obtained data were discussed on the basis of the valence exchange between (Fe3+, Fe2+), (Fe2+, Nd3+) and (Fe2+, Ti4+). Also the effect of sintering temperature and Heating Rate of preparation were discussed.
