Author
Nobuyoshi Tsuzuki
Bio: Nobuyoshi Tsuzuki is an academic researcher from Tokyo Institute of Technology. The author has contributed to research in topics: Ultrasonic sensor & Ultrasonic flow meter. The author has an hindex of 9, co-authored 32 publications receiving 492 citations.
Papers
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TL;DR: In this article, a new flow channel configuration for printed circuit heat exchanger (PCHE) recuperators of a carbon dioxide gas turbine cycle was proposed, which has discontinuous fins with an S-shape similar to a sine curve, in contrast to the conventional continuous zigzag configuration.
223 citations
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TL;DR: In this article, a new PCHE with an S-shaped fin configuration was applied to a hot water supplier in which cold water of 7{sup o}C is warmed to 90Âsup o]C through heat-exchange with supercritical CO{sub 2} of 118{sup O}C and 115MPa pressure.
165 citations
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TL;DR: In this article, the authors used 3D-CFD to study the effect of fin angle, overlapping length, fin width, fin length, and edge roundness on thermal-hydraulic characteristics of an S-shaped fin.
Abstract: Fin shape effects on thermal-hydraulic characteristics were studied for a Microchannel Heat Exchanger (MCHE) with S-shaped fins using 3D-CFD and changing the fin parameters: fin angle, overlapping length, fin width, fin length, and edge roundness. The fin angle effect on the pressure drop is consistent with the equation obtained experimentally by Weisbach for a circular bent tube: the pressure drop in the S-shaped fin configuration results from bent flow. The overlap of fins with those located immediately downstream at the offset position provides a guide wing effect that reduces the pressure drop remarkably. The overlap was changed by changing the fin radial position and arc length. The pressure drop was minimized when the downstream fins are placed in the middle of the bent flow channels formed by the fins upstream, which differs from Ito's configuration obtained from experiments with a single bent duct. Regarding arc length, the pressure drop is minimized at the standard overlapping length, which was f...
51 citations
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TL;DR: Using 3D-CFD code, Nusselt number correlations for a microchannel heat exchanger (MCHE) with S-shaped fins used for hot water suppliers are obtained through numerical experiments and then validated as discussed by the authors.
39 citations
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TL;DR: In this article, a multiwave ultrasonic pulsed Doppler (multiwave UVP) method and wire mesh tomography (WMT) have been applied to the measurement of bubbly two-phase flow.
31 citations
Cited by
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415 citations
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TL;DR: In this article, the behavior of developmental CO2 Brayton turbomachinery in response to a fluctuating thermal input, much like the short-term transients experienced in solar environments, is analyzed.
390 citations
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TL;DR: In this paper, a literature review focuses on the applications of Computational Fluid Dynamics (CFD) in the field of heat exchangers, and the quality of the solutions obtained from these simulations are largely within the acceptable range proving that CFD is an effective tool for predicting the behavior and performance of a wide variety of heat- exchangers.
388 citations
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TL;DR: In this paper, the authors provide a historical perspective of the progress made in understanding the underlying mechanisms in single-phase liquid flow and two-phase flow boiling processes and their use in high heat flux removal applications.
Abstract: As the scale of devices becomes small, thermal control and heat dissipation from these devices can be effectively accomplished through the implementation of microchannel passages. The small passages provide a high surface area to volume ratio that enables higher heat transfer rates. High performance microchannel heat exchangers are also attractive in applications where space and/or weight constraints dictate the size of a heat exchanger or where performance enhancement is desired. This survey article provides a historical perspective of the progress made in understanding the underlying mechanisms in single-phase liquid flow and two-phase flow boiling processes and their use in high heat flux removal applications. Future research directions for (i) further enhancing the single-phase heat transfer performance and (ii) enabling practical implementation of flow boiling in microchannel heat exchangers are outlined.
310 citations
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TL;DR: In this paper, the authors evaluated different process intensification (PI) technologies for their suitability in post-combustion CO2 capture (PCC) using solvent process is one of the most mature carbon capture technologies There are two main barriers for PCC process using solvent to be commercially deployed: (a) high capital cost; (b) high thermal efficiency penalty due to solvent regeneration
282 citations