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Thermal Validation Study of AdBlue® Melting for Off Highway Vehicles
Technical Paper
2022-01-0560
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Selective Catalytic Reduction (SCR) is a process where one injects an aqueous solution of urea into a diesel exhaust system in order to reduce NOx emissions. The urea solution known as AdBlue® or Diesel Exhaust Fluid (DEF) is stored in a DEF Tank that can under cold weather conditions freeze over. Since AdBlue® is unusable while frozen, we use heaters installed in the tanks to melt AdBlue® with government regulations mandating time required to melt AdBlue® in the tank.
In this article, we investigate whether a CFD (Computational Fluid Dynamics) based methodology can accurately evaluate time required in melting AdBlue® for a given DEF Tank and heater coil design for a production vehicle as per standard testing procedure. Simulations used a coupled methodology with PowerFLOW® as the flow solver and PowerTHERM® as the thermal solver. The flow simulation did require an accurate modelling of phase change from solid to liquid for AdBlue®. We observe excellent agreement between test data and simulation and conclude that we can employ a simulation-based approach to validate and certify DEF Tank design.
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Mukutmoni, D., kandasamy, S., Tabacchi, D., Scotti, M. et al., "Thermal Validation Study of AdBlue® Melting for Off Highway Vehicles," SAE Technical Paper 2022-01-0560, 2022, https://doi.org/10.4271/2022-01-0560.Also In
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