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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20704 - Energy and fuels

Projekt

<a href="/cs/project/TJ01000192" target="_blank" >TJ01000192: Vývoj zařízení na rekuperaci odpadního tepla z extruze a lisování olejnin</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

EFM 17 - Experimental Fluid Mechanics 2017

ISBN

—

ISSN

2100-014X

e-ISSN

2100-014X

Počet stran výsledku

6

Strana od-do

—

Název nakladatele

EDP Sciences - Web of Conferences

Místo vydání

Les Ulis Cedex A

Místo konání akce

Mikulov

Datum konání akce

21. 11. 2017

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000454317800034