The Entec Thermodynamic Model
Engine utilizes the thermodynamics of the annealing process to determine
each coil’s interior temperatures. Radiation, conduction,
convection, and other components of the process are all modeled
for the specific equipment and product in the shop.
Variables such as coil variation (weight,
width, outside diameter, inside diameter, and gauge), heating method,
atmosphere composition, convection system type, variable flow systems,
and control TC performanceare used to calculate a matrix of internal
temperatures throughout the cycle. The
hot spot and cold spot temperatures of each coil are used to make
control decisions for mechanical and physical property control.
Using this engine, Entec’s Heating
Model, Cooling Model, Cleanliness Model, Sticker Break Model, and
other models control specific aspects of the annealing process at
optimal levels.
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Is
your shop like this?
Annealing Shops process a variety of products with various
dimensions and physical characteristics to satisfy numerous
metallurgical and customer requirements. This task represents
a significant challenge to even the most accomplished production
team.
Most shops use a statistical method like look-up tables or
regression analysis to determine heating times. These methods
assume uniform coils, stacking configurations, and operating
conditions. Statistical methods are not applicable outside
of the range in which they were developed. The potential for
error is increased when the process is changed and when the
product is at the extreme limits of the analysis. The “know-how”
to meet the challenge of exceptional non-recurring events
often resides with one or more experienced operators. These
practices may have a negative impact on consistency of product
quality and process operating costs.
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