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Experimental Investigation on the Performance of a Parallel Plate-Based Active Magnetic Regenerator
Thawatchai Keawkamrop,Ahmet Selim Dalkilic,Lazarus Godson Asirvatham,Jafar Amani,Omid Mahian,Somchai Wongwises 대한설비공학회 2018 International Journal Of Air-Conditioning and Refr Vol.26 No.2
This paper describes a prototype of a linear reciprocating magnetic refrigerator using a gadolinium parallel plate. The new design of the regenerator, installation, and experiment is presented. The regenerator consists of a gadolinium plate and an inlet/outlet section. The thickness and length of the gadolinium plate are 1mm and 80mm, respectively. The gap between parallel plates is 0.1mm. Water is used as the heat transfer °uid. The permanent magnet structure used in the present study can generate a maximum magnetic ¯eld intensity of 0.94 T. The effects of surface roughness of the gadolinium parallel plate on the temperature span and cooling capacity are investigated. The results show that there is no signi¯cant effect of surface roughness on the magnetic refrigerator performance at a high utilization factor. The results from the present study are important for the design of magnetic refrigerators operating at room temperature.
Thawatchai Keawkamrop,Somchai Wongwises 대한설비공학회 2019 International Journal Of Air-Conditioning and Refr Vol.27 No.1
Magnetic refrigeration is an environment-friendly cooling technology and an interesting potential replacement for the vapor compression refrigeration system. This paper presents a linear reciprocating magnetic refrigerator prototype that operates at room temperature by using gadolinium parallel plates under a maximum magnetic field intensity of 0.94 T. The design, installation and preliminary results are reported. The temperature span and cooling capacity are studied in a function of cycle frequency, and the results show the cycle frequency effects on temperature span and cooling capacity. The maximum temperature span and cooling capacity for cycle frequency of 0.16 Hz are 1.3 K and 4.68 W, respectively. The results from the experiment will be a guideline to determine the maximum performance of the magnetic refrigerator prototype.