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Fluid choice and test standardization for magnetic regenerator used in room temperature.

Number: sect. 3

Author(s) : LIU C., WU J., HOU P., et al.

Summary

Numerical simulation method has been used to investigate a rotary active magnetic regenerator (RAMR) around room temperature range. In order to study the impact of factors such as operation frequency, different flow rate, various kinds of heat transfer fluid and magnetic field intensity on the performance of the RAMR, a two-dimensional porous model based on energy conservation equations of the fluid around gadolinium particles has been established. The internal temperature distribution and cooling capacity of the system were obtained and the influence of operation frequency on the cooling capacity is discussed. The simulation results showed that when mercury substituted water as heat transfer fluid, the cooling capacity can be improved by nearly 600%. The fluid with high conductivity, high density and low specific heat properties is more suitable to be heat transfer fluid. It is demonstrated that the environment conditions such as heat/cool source temperature affected the performance of the RAMR directly. Three feasible types of test standards have been proposed according to evaluation index of a fixed test environment, index of maximum exergy and index of maximum specific exergy around Curie temperature, respectively.

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Pages: 461-468

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Details

  • Original title: Fluid choice and test standardization for magnetic regenerator used in room temperature.
  • Record ID : 30005595
  • Languages: English
  • Source: 5th International Conference on Magnetic Refrigeration at Room Temperature (Thermag V). Proceedings: Grenoble, France, September 17-20, 2012.
  • Publication date: 2012/09/17

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