Experimental performance investigation of an active magnetic regenerator subject to different fluid flow waveforms
| Autor: | P. Govindappa, I. Niknia, T.V. Christiaanse, R. Teyber, Paulo V. Trevizoli, Andrew Rowe |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
020209 energy Mechanical Engineering 02 engineering and technology Building and Construction Mechanics Concentric 021001 nanoscience & nanotechnology Magnetic field Halbach array Flow control (fluid) Nuclear magnetic resonance Regenerative heat exchanger otorhinolaryngologic diseases 0202 electrical engineering electronic engineering information engineering Fluid dynamics Magnetic refrigeration Waveform 0210 nano-technology |
| Zdroj: | International Journal of Refrigeration. 74:38-46 |
| ISSN: | 0140-7007 |
| Popis: | A flow control mechanism based on cam actuated valves is designed and implemented on an active magnetic regenerator test apparatus. The objective is to overcome the brief low field period of the nested concentric Halbach array by decreasing the fluid blow width, displacing fluid only when the magnetic field is close to the minimum and maximum values. Flow waveforms are simulated to evaluate varying blow durations with the same displaced volume. AMR experiments are performed where the largest ExQ of 1.62 W is obtained with VD = 13.90 cm3 and a diversion ratio of δ = 0.41, demonstrating an 11.2% increase over the sinusoidal waveform. |
| Databáze: | OpenAIRE |
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