In fire events it is important to evaluate the response of critical structural components or equipment

Heat transfer analyses commonly arise when an estimate of the fire resistance rating of an unlisted or unprotected structural component is required or when the fire exposure is expected to deviate significantly from a standard test exposure. Heat transfer analyses also are used to predict the thermal response of combustibles or other objects for which a temperature increase could have an adverse effect and to provide temperature data as input to structural response models. The goal of any heat transfer analysis is usually the same: to predict the transient temperature response of a solid region given a known or prescribed fire exposure. Depending on what is evaluated, the transient temperature field in an object may be one-, two-, or three-dimensional and the boundary conditions may include convection, thermal radiation, or even a contact resistance. JENSEN HUGHES’ experienced staff of engineers and scientists have the capability to perform multi-dimensional heat transfer analyses in Cartesian, cylindrical, spherical, or mixed coordinate systems involving steady-state and transient fire exposures. A heat transfer model may also include one or multiple materials, and each material may have constant or time, temperature, or spatially varying thermal material properties.

Structural Fire Resistance

Picture_Section 1a - Services_Risk and Hazard Analysis_Modeling_Heat TransferA heat transfer analysis is a useful tool for assessing the fire effects on an unprotected structural component or for determining the adequacy of passive fire protection on a structural member. Heat transfer modeling is used at JENSEN HUGHES to determine the adequacy passive fire protection when the actual fire exposure differs significantly from the fire exposure used to rate an assembly. The exposure conditions for structural fire resistance evaluations may be derived from empirical heat flux models or from complex simulations using fire dynamics / CFD. JENSEN HUGHES has also successfully used the heat transfer analysis as a basis for listing two fire structural assemblies in the Underwriters Laboratories Fire Resistance directory in place of the full scale fire test.

Fire Barrier Analysis

Picture_Section 2 - Services_Risk and Hazard Analysis_Modeling_Heat TransferJENSEN HUGHES uses heat transfer modeling to determine the adequacy of fire barriers or to provide design guidance on the level or protection or thickness of a barrier necessary to meet applicable standards. The heat transfer analysis can be used to quickly assess the response of multiple fire barrier designs to many different fire exposures. This provides a significant advantage over a fire test in terms of cost and time.

High Risk Areas

A heat transfer analysis is an important tool for assessing the effects of fire on risk in high-hazard facilities, such as a nuclear power plant. Critical targets, which may include control cables, electronic equipment, and pumps, are modeled at JENSEN HUGHES using heat transfer models and material properties applicable to the target.

Contact Us Today:

Contact us today using our online form or by contacting one of our many regional branches. For specific questions regarding JENSEN HUGHES’ Heat Transfer Analysis services, please contact:

Jason Floyd, PhD
410-737-8677 x236