BISCO

2D steady state heat transfer
free form


Home Products BISCO examples

Efficient method to calculate thermal transmittances via bitmaps

BISCO version 11.0w (see Upgrade info)

Download PowerPoint Show (12.6 Mb)
Download Frame_cavity_heat_transfer.pdf



Geometry
  • Conversion of DXF file to 256 colours BMP file, via input of colour for each DXF layer and input of bitmap resolution
  • 256 colours BMP file contains geometric description required by BISCO
  • Colours in BMP file are indices to materials and boundary conditions
Thermal properties
  • Linked to bitmap via colours
  • Materials: thermal conductivity, surface emissivity.
    Automatic calculation of equivalent thermal conductivity for air cavities.
  • Optimisation of air cavities by detecting grooves and interconnections
  • Surface boundary conditions: ambient temperature, heat transfer coefficient, heat flux.
    Improved simulation of radiation and convection by use of RADCON module.
  • Detection of surfaces with increased surface resistance (in edges or junctions between two surfaces)
  • Line boundary conditions (fixed temperature or flux) in borderlines between two colours

Automation
  • Colours with predefined thermal properties when starting from template file
  • Load thermal properties from material database
  • Triangular mesh generation based on mesh size per colour
  • Calculation of linear thermal transmittance, and thermal transmittance of a window frame

Output
  • Isotherms, heat flux magnitudes, heat flow lines
  • Minimum and maximum temperature, incoming and leaving heat flows per colour
  • Balanced air temperature for enclosed air cavities
  • Thermal transmittances and thermal bridge performances
  • Automatic report generation
  Applications
  • Thermal bridge analysis: heat loss calculation, surface condensation (ISO/FDIS 10211, ISO 13788)
  • Thermal transmittances of building components and elements (EN ISO 6946)
  • Thermal performance of windows, doors and shutters (EN ISO 10077-2)
  • Heat transfer via the ground (ISO 13370)
  Compatibility
  • Dynamic version: BISTRA
  • TRISCO can read BISCO data (creates extruded profile, based on bitmap)
  • SOLIDO can read BISCO data (creates STL files per colour for extruded profile, based on triangulation mesh)
  Demo program
  • Download Physibel demo programs and manuals (14 Mb)
  Upgrade info