- Author
- Pehrson, R.
- Title
- Computer Modeling of Intumescent Penetration Seals.
- Coporate
- Worcester Polytechnic Inst., MA
- Report
- Thesis, May 10, 1993, 319 p.
- Keywords
- computer models | seals | penetration | heat transfer | test methods | computer programs
- Identifiers
- intumescent process; principle test methods for penetration seals; properties of materials at elevated temperatures; existing intumescent models; equation development for model; program calculation procedure
- Abstract
- Penetrations in rated barriers require protection, or sealing, to prevent the passage of flame and smoke to uninvolved areas during a fire. Current regulatory practice requires furnace testing following ASTM E814, "Standard Test Method for Fire Tests of Through Penetration Fire Stops" for each different arrangement or assembly. In terms of the properties desirable for a penetration seal (high heat absorbing ability and strength after fire exposure), intumescent materials offer an excellent choice. The following thesis describes a first attempt at modeling the 3-D heat transfer during an ASTM E814 furnace test of an intumescent penetration seal as part of a floor assembly. The model is limited to estimating the temperature on the unexposed side as a result of heat transfer through the assembly. It makes no attempt at modeling flame passage or ability of the seal to withstand hose stream exposure. The model also assumes a very simplified hot gas emissivity model for heat transfer from the furnace to the assembly. Radiant view factors and emissivities are not calculated, but must be entered by the user.