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Title: | Self pumping magnetic cooling | Authors: | Chaudhary, V Wang, Z Ray, A Sridhar, I Ramanujan, R.V |
Keywords: | Binary alloys Cooling Magnetic fields Magnetic fluids Manganese alloys Manganese removal (water treatment) Nanoparticles Temperature control Thermal load Waste heat Zinc alloys Comsol multiphysics Heat recovery device Initial temperatures Magnetic field strengths Magnetic nano-particles Technological significance Thermal management devices Thermomagnetic convection Nanomagnetics |
Issue Date: | 2017 | Publisher: | Institute of Physics Publishing | Citation: | Chaudhary, V, Wang, Z, Ray, A, Sridhar, I, Ramanujan, R.V (2017). Self pumping magnetic cooling. Journal of Physics D: Applied Physics 50 (3) : 03LT03. ScholarBank@NUS Repository. https://doi.org/10.1088/1361-6463/aa4f92 | Rights: | Attribution 4.0 International | Abstract: | Efficient thermal management and heat recovery devices are of high technological significance for innovative energy conservation solutions. We describe a study of a self-pumping magnetic cooling device, which does not require external energy input, employing Mn-Zn ferrite nanoparticles suspended in water. The device performance depends strongly on magnetic field strength, nanoparticle content in the fluid and heat load temperature. Cooling (ΔT) by ∼20 °C and ∼28 °C was achieved by the application of 0.3 T magnetic field when the initial temperature of the heat load was 64 °C and 87 °C, respectively. These experiments results were in good agreement with simulations performed with COMSOL Multiphysics. Our system is a self-regulating device; as the heat load increases, the magnetization of the ferrofluid decreases; leading to an increase in the fluid velocity and consequently, faster heat transfer from the heat source to the heat sink. © 2016 IOP Publishing Ltd. | Source Title: | Journal of Physics D: Applied Physics | URI: | https://scholarbank.nus.edu.sg/handle/10635/179246 | ISSN: | 0022-3727 | DOI: | 10.1088/1361-6463/aa4f92 | Rights: | Attribution 4.0 International |
Appears in Collections: | Elements Staff Publications |
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