28 June 2015 to 2 July 2015
JW Marriott Starr Pass Resort
Etc/GMT-7 timezone

Estimation of magnetocaloric properties by using Monte Carlo method for AMRR cycle

30 Jun 2015, 14:00
2h
Exhibit Hall (Arizona Ballroom) ()

Exhibit Hall (Arizona Ballroom)

Poster Presentation CEC-17 - Novel Concepts and New Devices C2PoM - Novel Concepts and New Devices II

Speaker

Mr Ryosuke Arai (Environment and Energy Materials Division, National Institute for Materials Science)

Description

Magnetic refrigeration uses solid magnetic materials as refrigerant without global warming gas and fluorocarbon. In addition, it is expected the higher efficiency than that of vapor refrigeration system. Active Magnetic Regenerative Refrigeration (AMRR) system has demonstrated as an environmentally attractive candidate in near room temperature. There are many studies for the magnetocaloric materials based on experimental results, however, few studies on the theoretical view, especially for the entropy property due to the magnetic interaction. Mean field theory is commonly used to calculate the properties of magnetocaloric materials, however, it is not in good agreement with the experimental data near the magnetic transition temperature. This is one of the issues to analyze the AMRR cycle by the computer simulation. In this study, we will take a different approach to estimate the magnetic properties more precisely by using the Monte Carlo method. We will compare the calculation results between classical mean field theory and Monte Carlo method for a typical magnetic material, and then, we will simulate the AMRR cycle by using this approach.

Primary author

Mr Ryosuke Arai (Environment and Energy Materials Division, National Institute for Materials Science)

Co-authors

Prof. Hideki Nakagome (Department of Urban Environment System, Chiba University) Dr Jing Li (Department of Urban Environment System, Chiba University) Dr Ryo Tamura (International Center for Young Scientists, National Institute for Materials Science) Dr Takenori Numazawa (Environment and Energy Materials Division, National Institute for Materials Science)

Presentation Materials