Abstract :

The main industry challenges today are facing its impact on the global warming effect problem, and its harm to the environment. Besides, the reduction of the complexity of system structure, initial cost, increases the system operation reliability and energy performance. Hence, scientists and engineers began to explore new refrigeration technologies such as the magnetic refrigeration. This paper focuses on a Reciprocating active magnetic regenerator constructed for the first time in Iraq, up to knowledge, used as laboratory device to investigate the effects of many operational parameters on its performance. An integrated design of the complete system was a specification, application, and validation were totally reported in Refs [1 & 2]. These reciprocating AMR apparatus consist a magnetocaloric material Gadolinium as the refrigerant and water as the heat transfer fluid is used to measure the no-load temperature span, represents the maximum temperature difference obtain between the two heat ends for a range of operating conditions. A one-dimensional dynamic model developed, to assist the design of the system, for the four sequential processes of the reciprocating AMR in detail, used the FORTRAN program, by measuring temperature profile on both sides of the test bed regenerator, and an analysis of the operating conditions of the magnetocaloric unit description. The maximum no-load temperature span was found to be about 11K, in which the regenerator operated temperature differences between the two outermost ends are 288K and 299K, respectively. Thus, for Utilization factor of 0.5 associated with an ambient temperature of 296K. Many other parameters studied for this temperatures span, as the volumetric flow rate dependence and found, 600mm3/sec, gives cooling power about 3W, for a piston stroke and total cycle time are 1cm and 8s, respectively.