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Studies on fluid dynamics and heat transfer characteristics of solid-state caloric cycles using new electric heating apparatus.

Number: 2141

Author(s) : KANG M., ELBEL S.

Summary

This research conducted an experimental and numerical study on fluid dynamics and heat transfer phenomena of a solid-state caloric cycle. Regenerative caloric cycles have a complex structure, and the caloric material constituting the regenerator is very expensive. Since the purpose of this research is to study fluid dynamics and thermal characteristics of oscillatory flow inside the system, a reciprocating flow is created using a motor and a linkage system. A new electric heating apparatus capable of simulating a caloric effect is implemented. Stainless steel, which has thermal properties similar to those of gadolinium most commonly used in the magnetocaloric cycle, is used to create a realistic regenerator behavior as much as possible. Although the cooling effect cannot be generated by using current equipment, heat transfer in single-phase flow is essentially identical between the cooling and heating processes. Therefore, the new heating apparatus can simplify the structure of the experimental equipment, reduce costs significantly to manufacture the experimental facility, and conduct research on the fluid flow and heat transfer inside the regenerator.
The experimental equipment can stably adjust the heating power applied to the regenerator using a potentiometer, thereby easily simulating different field intensities. The flow profile, flow velocity, and displacement ratio can be easily and accurately controlled by utilizing the linkage system and the servo motor. Through this experimental equipment, a new modeling approach for the solid-state caloric cycle could be verified. The new model considers developing region which is created by oscillatory flow. This developing region is added not only to the regenerator model but also to the heat exchanger models in this research. The new experimental approach has shown that the model can more accurately predict the results under different displacement ratios.

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Pages: 9 p.

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  • Original title: Studies on fluid dynamics and heat transfer characteristics of solid-state caloric cycles using new electric heating apparatus.
  • Record ID : 30030485
  • Languages: English
  • Subject: Technology
  • Source: 2022 Purdue Conferences. 19th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2022/07/10

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