CREEM2020

CREEM2020

Análise termodinâmica de motores termomagnéticos operando segundo o ciclo Brayton

Submission Author: Matheus Urquiza Lima Santos , MG
Co-Authors: Matheus Urquiza Lima Santos, Lorenzo Dos Santos Corrêa
Presenter: Matheus Urquiza Lima Santos

doi://10.26678/ABCM.CREEM2020.CRE2020-0018

 

Abstract

Thermomagnetic motors have been proposed as an interesting alternative to recover low-grade energy waste. Although they present low Carnot efficiency, especially operating in temperature ranges from 25°C up to 200°C, the use of such systems, based on the concept of cogeneration, allows the increase of major power plants’ global efficiency. In order to achieve such goal, one of the most common thermodynamic cycles used is Brayton’s, ideally composed of two isomagnetic fields, and two isentropic processes. The present work aims to study the impact of demagnetizing field losses on the specific work as well as on the First and Second Law of Thermodynamic efficiencies of a thermomagnetic motor operating in accordance to Brayton´s Cycle. The soft magnetic material used is Gadolinium. The analysis are based on the temperature – entropy diagram and specific heat – temperature diagrams, both of which obtained from the WDS theory.

Keywords

Thermomagnetic motors, . Low-grade thermal waste recovery, Magnetization, Gadolinium, Thermodynamic evaluation, Brayton Cycle

 

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