Effect of flow velocity on the process of air-steam condensation in a vertical tube condenser

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F18%3A00327327" target="_blank" >RIV/68407700:21220/18:00327327 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1051/epjconf/201818002033" target="_blank" >http://dx.doi.org/10.1051/epjconf/201818002033</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1051/epjconf/201818002033" target="_blank" >10.1051/epjconf/201818002033</a>

Result language
angličtina
Original language name
Effect of flow velocity on the process of air-steam condensation in a vertical tube condenser
Original language description
This article describes the influence of flow velocity on the condensation process in a vertical tube. For the case of condensation in a vertical tube condenser, both the pure steam condensation process and the air-steam mixture condensation process were theoretically and experimentally analyzed. The influence of steam flow velocity on the value of the heat transfer coefficient during the condensation process was evaluated. For condensation of pure steam, the influence of flow velocity on the value of the heat transfer coefficient begins to show up at higher speeds, conversely, this effect is negligible at low values of steam velocity. On the other hand, for the air-steam mixture condensation, the influence of flow velocity has to be always taken into account. The flow velocity affects the water vapor diffusion process through non-condensing air. The presence of air significantly reduces the value of the heat transfer coefficient. This drop in the heat transfer coefficient is significant at low velocities; on the contrary, the decrease is relatively small at high values of the velocity.
Czech name
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Czech description
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Project
<a href="/en/project/TJ01000192" target="_blank" >TJ01000192: Development of a unit for recovering waste heat from extrusion and pressing of oilseeds</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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