Merkel model based optimum liquid to gas ratio at simultaneous heat and mass transfer

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F19%3A00336814" target="_blank" >RIV/68407700:21220/19:00336814 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1063/1.5114745" target="_blank" >http://dx.doi.org/10.1063/1.5114745</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/1.5114745" target="_blank" >10.1063/1.5114745</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Merkel model based optimum liquid to gas ratio at simultaneous heat and mass transfer

Popis výsledku v původním jazyce

The article deals with an evaluation of optimum liquid to gas ratio in counterflow wet-cooling tower fill. A simple one dimensional model of heat and mass transfer in wet-cooling tower fill is mentioned and its simplification to Merkel model is discussed. Optimum liquid to gas ratio is solved based on the Merkel model where simultaneous heat an mass transfer is taken into account. It is well known that in the case of Merkel model is the driving force of heat and mass transfer reduced to a difference in enthalpy of saturated moist air at water temperature and moist air enthalpy. It is shown that the slope of moist air enthalpy line in enthalpy and water temperature diagram is related to liquid to gas ratio in Merkel model. Optimum liquid to gas ratio is evaluated based on the assumption of uniform enthalpy difference around the wet cooling tower fill. The variance of enthalpy difference is minimized using fminsearch function in Matlab program. Minimization of enthalpy difference based on its variance is equivalent with least squares minimization. An example of optimum liquid to gas ratio evaluation is presented in the article. This method can be used as a step in the design process of a cooling tower.

Název v anglickém jazyce

Merkel model based optimum liquid to gas ratio at simultaneous heat and mass transfer

Popis výsledku anglicky

The article deals with an evaluation of optimum liquid to gas ratio in counterflow wet-cooling tower fill. A simple one dimensional model of heat and mass transfer in wet-cooling tower fill is mentioned and its simplification to Merkel model is discussed. Optimum liquid to gas ratio is solved based on the Merkel model where simultaneous heat an mass transfer is taken into account. It is well known that in the case of Merkel model is the driving force of heat and mass transfer reduced to a difference in enthalpy of saturated moist air at water temperature and moist air enthalpy. It is shown that the slope of moist air enthalpy line in enthalpy and water temperature diagram is related to liquid to gas ratio in Merkel model. Optimum liquid to gas ratio is evaluated based on the assumption of uniform enthalpy difference around the wet cooling tower fill. The variance of enthalpy difference is minimized using fminsearch function in Matlab program. Minimization of enthalpy difference based on its variance is equivalent with least squares minimization. An example of optimum liquid to gas ratio evaluation is presented in the article. This method can be used as a step in the design process of a cooling tower.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20303 - Thermodynamics

Projekt

<a href="/cs/project/TE01020036" target="_blank" >TE01020036: Pokročilé technologie pro výrobu tepla a elektřiny</a><br>

Návaznosti

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

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název statě ve sborníku

AIP Conference Proceedings

ISBN

978-0-7354-1858-5

ISSN

0094-243X

e-ISSN

—

Počet stran výsledku

4

Strana od-do

—

Název nakladatele

AIP Conference Proceedings

Místo vydání

New York

Místo konání akce

Liptovský Mikuláš

Datum konání akce

19. 6. 2019

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—