Hydronic floor heating: Analysis of energy consumption, temperature, and velocity fields

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24210%2F25%3A00013662" target="_blank" >RIV/46747885:24210/25:00013662 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/46747885:24620/25:00013662

Výsledek na webu

<a href="https://doi.org/10.1177/17442591241311496" target="_blank" >https://doi.org/10.1177/17442591241311496</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1177/17442591241311496" target="_blank" >10.1177/17442591241311496</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Hydronic floor heating: Analysis of energy consumption, temperature, and velocity fields

Popis výsledku v původním jazyce

Hydronic floor heating has been recognized as one of the important systems utilized for warming residential buildings, therefore, the flow field and temperature distribution studies of the floor and locally heated residential spaces are essential. In this work, such a study is performed on a room with different horizontal aspect ratios through three-dimensional numerical simulations using FLUENT software. The governing equations accounting for the continuity, momentum, and energy together with the radiation have been solved using the Boussinesq approximation, the radiation DO model, and the modified k − ε turbulence model, while the SIMPLE method was utilized. Results show that at least 65% of the total heat transfer from the heated floor is due to radiation, while in the locally heated room, the radiation from the radiator was at most 55% of the total. When floor heating was utilized, the uniform temperature is obtained for all of the room aspect ratios, whereas in the case of local heating, thermal stratification occurs along the room height, as the temperature was considerably higher at upper heights. In the floor heating, the air velocity throughout the room was less than 0.2 m/s, whereas, for the local heating, the air velocity was higher than 0.2 m/s close to the radiator. In comparison with the local heating, the floor heating caused at least 20% energy saving and optimum thermal and velocity comfort conditions.

Název v anglickém jazyce

Hydronic floor heating: Analysis of energy consumption, temperature, and velocity fields

Popis výsledku anglicky

Hydronic floor heating has been recognized as one of the important systems utilized for warming residential buildings, therefore, the flow field and temperature distribution studies of the floor and locally heated residential spaces are essential. In this work, such a study is performed on a room with different horizontal aspect ratios through three-dimensional numerical simulations using FLUENT software. The governing equations accounting for the continuity, momentum, and energy together with the radiation have been solved using the Boussinesq approximation, the radiation DO model, and the modified k − ε turbulence model, while the SIMPLE method was utilized. Results show that at least 65% of the total heat transfer from the heated floor is due to radiation, while in the locally heated room, the radiation from the radiator was at most 55% of the total. When floor heating was utilized, the uniform temperature is obtained for all of the room aspect ratios, whereas in the case of local heating, thermal stratification occurs along the room height, as the temperature was considerably higher at upper heights. In the floor heating, the air velocity throughout the room was less than 0.2 m/s, whereas, for the local heating, the air velocity was higher than 0.2 m/s close to the radiator. In comparison with the local heating, the floor heating caused at least 20% energy saving and optimum thermal and velocity comfort conditions.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20102 - Construction engineering, Municipal and structural engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

JOURNAL OF BUILDING PHYSICS>

ISSN

1744-2591

e-ISSN

—

Svazek periodika

49

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

24

Strana od-do

461-483

Kód UT WoS článku

001410078000001

EID výsledku v databázi Scopus

2-s2.0-85216718853