QuickField

A new approach to field modelling

Main >> Applications >> Sample problems

ISO 10211:2007 Thermal bridges in building construction. Test case A.3 validation

ISO 10211:2007, thermal bridges in building construction

QuickField validation of the test case A.3 presented in ISO 10211:2007 Thermal bridges in building construction.

Problem Type:
3D problem of heat transfer.

Geometry:
ISO 10211:2007 Thermal bridges in building construction. Test case A.3 validation QuickField validation of the test case A.3 presented in ISO 10211:2007 Thermal bridges in building construction. Second floor First floor Plaster Floor slab Brick Aerated concrete Insulation T=0°C Rs = 0.05 W/K·m² T=15°C, Rs = 0.2 W/K·m² T=20°C, Rs = 0.2 W/K·m²

Given:
Thermal conductivity of materials:
AAC λ1 = 0.7 W/K-m.
Insulation λ2 = 0.04 W/K-m.
Brick λ3 = 1.0 W/K-m.
Concrete slab λ4 = 2.5 W/K-m.
Plaster λ5 = 1 W/K-m.

Task:
The floor slab penetrates the wall near the corner and forms the cold bridge. Determine the flux and the thermal coupling coefficients.

Solution:
Air contact surface thermal resistance Rs is caused by the convection. The convection coefficient value is reciprocal to the surface resistance value:
α = 1 / Rs [W/(K·m²)].

Results:
Temperature distribution in media (click to see 3D view):

EN ISO 10211:2007 test case 3 heat flux

Temperature in the corners: QuickField Reference %%
First floor 11.12°C 11.11°C <0.1 K
Second floor 11.37°C 11.32°C <0.1 K
Heat flux: 59.4 W 59.98 W 1%

Thermal coupling coefficients (reference values are in the brackets).

External First floor Second floor
External (1.000) (0.000) (0.000)
First floor 0.375 (0.378) 0.401 (0.399) 0.223 (0.223)
Second floor 0.329 (0.331) 0.216 (0.214) 0.455 (0.455)

To comply with the ISO 10211:2007 the difference between calculated and reference heat flux should be less than 2% (0.1°K - for temperature). This simulation accuracy complies with the requirements of ISO 10211:2007.

*ISO 10211:2007(en) Thermal bridges in building construction - Heat flows and surface temperatures - Detailed calculations.

New version QuickField 6.4

Product
Order
Evaluation request
Editions
Version history
Packages
Components
Programming
Consulting

Applications
Industrial
Educational
Scientific
Sample problems
Success stories
Customers

Support
Webinars
Virtual Classroom
Online courses
Customer login
Glossary
QuickField help
FAQ

Downloads
QuickField Student Edition
User manual
Data Libraries
Video
Free tools

News
Product News
Events
Publications
Subscription

Contacts
Tera Analysis info
Resellers
Contact us
Online chat
About us