Event Details
Demagnetizing Effects in Active Magnetic Regenerators
Presenter: Ozan Peksoy - Department of Mechanical Engineering
Supervisor:
Date: Fri, November 21, 2003
Time: 14:00:00 - 15:00:00
Place: EOW 430
ABSTRACT
ABSTRACT
There are several reasons to move to fuels with lower carbon content, in particular hydrogen; climate instability due to greenhouse gas emissions being one. Finding an efficient way to store gaseous fuels is one of the main impediments in the utilization of hydrogen. The creation of compact and efficient liquefiers using Active Magnetic Regenerative (AMR) Refrigerators may be a solution to this problem.
AMRs use the magnetocaloric effect of ferromagnetic materials to achieve cooling whereby the application or removal of a magnetic field induces a reversible temperature change. Due to geometry and non-uniform properties, an AMR bed is subject to non-negligible demagnetizing effects which can reduce the net work of the material. A numerical model is used to examine the effects of demagnetizing fields in an AMR. Model results for single-material beds show the impacts of temperature on effective magnetization and suggest that demagnetization effects will reduce the magnetic work. A proposed solution to this problem is modeled and discussed.
FREE AND OPEN TO THE PUBLIC
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For Further Information Please Contact: Ozan Peksoy (721-6287)