Application of dimensional analysis in determining the heat loss in district heating systems

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F16%3A86099368" target="_blank" >RIV/61989100:27360/16:86099368 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.14311/AP.2016.56.0081" target="_blank" >http://dx.doi.org/10.14311/AP.2016.56.0081</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.14311/AP.2016.56.0081" target="_blank" >10.14311/AP.2016.56.0081</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Application of dimensional analysis in determining the heat loss in district heating systems

Popis výsledku v původním jazyce

Existing procedures for determining the heat loss in heat distribution use balance relations, or rather they are based on the theory of heat and mass transfer. Dimensional analysis enables a new point of view that demonstrated the functionality of heat loss from selected physical quantities that contribute to heat loss. The solution provides one complex criterion and four simplex criteria of similarity. Transforming these criteria of similarity leads to the formulation of the functional dependence of only two criteria, on the basis of which the amount of heat loss can be determined. The resulting criterial dependency is simple, and is calculated in this paper for a pipe one meter in longth. The mathematic model for demonstrating the heat loss is of universal validity, and applies to a wide range of piping used for hot water distribution. However, for each nominal diameter of piping it is necessary to take into account the mutual dependency of the dimensionless arguments π5 on π1, the form of which is always different. In the paper, this dependency is demonstrated for two nominal diameters DN65 and DN125. (C) Czech Technical University in Prague, 2016.

Název v anglickém jazyce

Application of dimensional analysis in determining the heat loss in district heating systems

Popis výsledku anglicky

Existing procedures for determining the heat loss in heat distribution use balance relations, or rather they are based on the theory of heat and mass transfer. Dimensional analysis enables a new point of view that demonstrated the functionality of heat loss from selected physical quantities that contribute to heat loss. The solution provides one complex criterion and four simplex criteria of similarity. Transforming these criteria of similarity leads to the formulation of the functional dependence of only two criteria, on the basis of which the amount of heat loss can be determined. The resulting criterial dependency is simple, and is calculated in this paper for a pipe one meter in longth. The mathematic model for demonstrating the heat loss is of universal validity, and applies to a wide range of piping used for hot water distribution. However, for each nominal diameter of piping it is necessary to take into account the mutual dependency of the dimensionless arguments π5 on π1, the form of which is always different. In the paper, this dependency is demonstrated for two nominal diameters DN65 and DN125. (C) Czech Technical University in Prague, 2016.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

—

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Acta Polytechnica

ISSN

1210-2709

e-ISSN

—

Svazek periodika

56

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

7

Strana od-do

81-87

Kód UT WoS článku

—

EID výsledku v databázi Scopus

2-s2.0-84966671900