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Transient heat exchanger simulation through 1D And 3D CFD models.

Number: 2520

Author(s) : VERA J., SCHILLACI E., TORRAS S., OLIET C., OLIVA A.

Summary

In many manufacturing processes, such as injection molding for plastics, heat exchangers must provide a switch between operation modes to provide cold or to remain idle in different steps of the process, thus exhibiting a cyclic behavior.
While existing research predominantly focuses on heat exchangers in steady-state configurations, this work addresses the challenges posed by cyclic behaviors inherent in certain industrial processes. The primary aim of this study is to propose and simulate a heat exchanger employed in transient cyclic processes, specifically one comprising a coiled tube integrated into an accumulation tank. The tube allows for an efficient heat exchange, while the tank is able to dampen the oscillations of the cycle.
This paper employs a dual simulation approach using both 1D transient models and 3D Computational Fluid Dynamics (CFD) transient models to achieve a comprehensive understanding of the heat exchanger behavior. The 3D CFD model offers a deep insight into the system behaviour, providing accurate results for specific operational condition sand allowing the calibration of the 1D model. In contrast, the 1D model, which needs the input of semi-empirical coefficients to provide accurate results, is computationally less expensive, facilitating multiple parametric simulations to explore diverse working conditions and assess the impact of design changes.

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Pages: 10 p.

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  • Original title: Transient heat exchanger simulation through 1D And 3D CFD models.
  • Record ID : 30033040
  • Languages: English
  • Subject: Technology
  • Source: 2024 Purdue Conferences. 20th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2024/07/17

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