QuickField

A new approach to field modelling
 Language:

order

evaluation

editions

version history

packages

components

programming

consulting

industrial

educational

scientific

sample problems

success stories

customers

 webinars virtual classroom online courses customer login glossary quickfield help faq
 quickfield student edition user manual data libraries video free tools
 product news events blog publications subscription
 tera analysis info resellers contact us online chat about us

 Examples gallery Step-by-step tutorials Verification examples Programming examples Distributive examples

>> >>

# Heat losses through windows

Calculation of the heat insulation of the building walls is an important stage of the design process. Additional heat losses arise from the thermal conductive inclusions such as interfloor bridging, window slopes, balcony plates, brackets of the system of the insulation facing and the other essential elements of the facade.
It is necessary to calculate these losses for accurate determination of the overall thermal resistance value.

Problem type:
Plane-parallel problem of heat transfer.

Geometry:

Given:
Temperature inside the room: T1 = +20 °C;
Temperature outside the room (ambient air): T2 = -32 °C.

 Layer, material Layerthickness[m] Materialdensity[kg/m3] ThermalconductivityW/(m·K) Cement 0.015 1800 0.93 Brick wall Brick 0.64 1800 0.81 Modern construction Aerated concrete 0.3 400 0.15 Insulation Rockwool FACADE BATTS 0.13 145 0.048 Plaster 0.12 1800 0.81

Task:
Calculate additional heat losses per length through the window slope for the monolayered brick wall and for multilayered modern construction.

Results:
Temperature distribution in the wall.

 Heat flux [W/m] through: Total [W/m] Wall Windows reveal Thermal-conductive inclusions Monolayered brick wall 22.5 (49%) 17.1 (38%) 5.9 (13%) 45.5 Multi-layered modern construction 5.0 (42%) 4.3 (36%) 2.5 (21%) 11.8

* Reference: D.V.Kraynov, I.S.Safin, A.S.Ljubimcev, Calculation of additional heat loss through heat-conducting inclusions (on the example of window reveal), Magazine of Civil Engineering, ¹6 (16), 2010. - p. 17-22.

Download simulation files (files may be viewed using any QuickField Edition).