Numerical and experimental investigation of flue gases heat recovery via condensing heat exchanger

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27230%2F18%3A10239229" target="_blank" >RIV/61989100:27230/18:10239229 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989100:27360/18:10239229

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0017931017357113?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0017931017357113?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ijheatmasstransfer.2018.04.051" target="_blank" >10.1016/j.ijheatmasstransfer.2018.04.051</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Numerical and experimental investigation of flue gases heat recovery via condensing heat exchanger

Popis výsledku v původním jazyce

The ever increasing environmental awareness introduces the trend of increasing the efficiency of power plants via implementing waste heat recovery. This study reports two numerical models suitable for analyses of a condensing heat exchanger. The numerically predicted results are compared with the results acquired experimentally with the use of a coal-fired water condensing heat exchanger installed in the local laboratory of thermal engineering. The first applied mathematical model is a stationary 1D model based on our own modification of the Colburn-Hougen model. The second one is a proposed 3D multi-phase flow model based on the Euler model of mixture expanded by the model of condensation of water vapour from the flue gases. A thorough comparative analysis of the results of both the numerical models and the experimental ones showed very good correlation. The differences between all the acquired results for the temperatures of flue gases and heated water at the outlet of the heat exchanger did not exceed 4 degrees C. In cases of heat recovery with the occurrence of condensation, the latent heat has a significant influence on the flue gases and water temperatures at heat exchanger outlet.

Název v anglickém jazyce

Numerical and experimental investigation of flue gases heat recovery via condensing heat exchanger

Popis výsledku anglicky

The ever increasing environmental awareness introduces the trend of increasing the efficiency of power plants via implementing waste heat recovery. This study reports two numerical models suitable for analyses of a condensing heat exchanger. The numerically predicted results are compared with the results acquired experimentally with the use of a coal-fired water condensing heat exchanger installed in the local laboratory of thermal engineering. The first applied mathematical model is a stationary 1D model based on our own modification of the Colburn-Hougen model. The second one is a proposed 3D multi-phase flow model based on the Euler model of mixture expanded by the model of condensation of water vapour from the flue gases. A thorough comparative analysis of the results of both the numerical models and the experimental ones showed very good correlation. The differences between all the acquired results for the temperatures of flue gases and heated water at the outlet of the heat exchanger did not exceed 4 degrees C. In cases of heat recovery with the occurrence of condensation, the latent heat has a significant influence on the flue gases and water temperatures at heat exchanger outlet.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20303 - Thermodynamics

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

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 periodika

International Journal of Heat and Mass Transfer

ISSN

0017-9310

e-ISSN

—

Svazek periodika

124

Číslo periodika v rámci svazku

September

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

13

Strana od-do

1321-1333

Kód UT WoS článku

000437077100113

EID výsledku v databázi Scopus

2-s2.0-85045538578