Publication result detail

Transient Numerical Simulation of Linear Thermal Transmittance in Software CalA

PLÁŠEK, J.; ŠIKULA, O.

Original Title

Transient Numerical Simulation of Linear Thermal Transmittance in Software CalA

English Title

Transient Numerical Simulation of Linear Thermal Transmittance in Software CalA

Type

Paper in proceedings (conference paper)

Original Abstract

Calculation of heat losses of buildings according to European standard EN ISO 10211 and Czech standard ČSN 73 0540 is simplified to one-dimensional time-steady heat conduction through the building construction in direction of the largest temperature gradient. This simplification of the calculation is incorrect in case of complex geometry. Calculation according to norm takes into account this inaccuracy and uses Linear Thermal Transmittance in 2D geometry or Point Thermal Transmittance in the 3D geometry as a calculation correction. This contribution is focused on detailed calculation of linear thermal transmittance in case of contact external peripheral wall and plastic window frame. Results of two-dimensional transient numerical simulation show unsteady linear thermal transmittance in time and dependence on solar radiation. All of these variable boundary conditions can be easily simulated in the software CalA as well as complex geometry.

English abstract

Calculation of heat losses of buildings according to European standard EN ISO 10211 and Czech standard ČSN 73 0540 is simplified to one-dimensional time-steady heat conduction through the building construction in direction of the largest temperature gradient. This simplification of the calculation is incorrect in case of complex geometry. Calculation according to norm takes into account this inaccuracy and uses Linear Thermal Transmittance in 2D geometry or Point Thermal Transmittance in the 3D geometry as a calculation correction. This contribution is focused on detailed calculation of linear thermal transmittance in case of contact external peripheral wall and plastic window frame. Results of two-dimensional transient numerical simulation show unsteady linear thermal transmittance in time and dependence on solar radiation. All of these variable boundary conditions can be easily simulated in the software CalA as well as complex geometry.

Keywords

Transient Numerical Simulation; Linear Thermal Transmittance; Software CalA

Key words in English

Transient Numerical Simulation; Linear Thermal Transmittance; Software CalA

Authors

PLÁŠEK, J.; ŠIKULA, O.

Released

13.10.2014

Publisher

Trans Tech Publications

Location

Switzerland

ISBN

978-3-03835-280-8

Book

Envibuild 2014

Edition

2014

ISBN

1022-6680

Periodical

Advanced Materials Research

Volume

2014

Number

1041

State

Swiss Confederation

Pages from

281

Pages to

284

Pages count

4

BibTex

@inproceedings{BUT109760,
  author="Josef {Plášek} and Ondřej {Šikula}",
  title="Transient Numerical Simulation of Linear Thermal Transmittance in Software CalA",
  booktitle="Envibuild 2014",
  year="2014",
  series="2014",
  journal="Advanced Materials Research",
  volume="2014",
  number="1041",
  pages="281--284",
  publisher="Trans Tech Publications",
  address="Switzerland",
  doi="10.4028/www.scientific.net/AMR.1041.281",
  isbn="978-3-03835-280-8",
  issn="1022-6680"
}