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

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

JG - Metallurgy, metal materials

OECD FORD branch

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Project

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Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2016

Confidentiality

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

Name of the periodical

Acta Polytechnica

ISSN

1210-2709

e-ISSN

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Volume of the periodical

56

Issue of the periodical within the volume

2

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

7

Pages from-to

81-87

UT code for WoS article

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EID of the result in the Scopus database

2-s2.0-84966671900