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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

High Performance of Carbon Nanotube Refrigerators

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Autor(es):
Cantuario, Tiago E. [1] ; Fonseca, Alexandre F. [1]
Número total de Autores: 2
Afiliação do(s) autor(es):
[1] Univ Estadual Campinas, Appl Phys Dept, BR-13083970 Campinas, SP - Brazil
Número total de Afiliações: 1
Tipo de documento: Artigo Científico
Fonte: Annalen der Physik; v. 531, n. 4 APR 2019.
Citações Web of Science: 0
Resumo

Vapor-compression dominates the market for refrigeration devices due to low cost and relatively high efficiency. However, the most efficient vapor refrigerants are either ozone depleting or global warming substances. Solid-state cooling is a young field of research with promising results toward the development of new, efficient, and environment friendly technology for a new generation of refrigeration devices. One of these methods is based on the so-called elastocaloric effect (ECE), which consists of a temperature variation of a system in response to the application of adiabatic stresses. Although most of the literature describes the study of ECE solid-state cooling based on materials undergoing phase-transitions, a study recently predicted that carbon nanotubes (CNTs) present ECE as large as 30 K for 3% of strain. This motivates research toward the development of nanorefrigerators. As nobody knows the efficiency of such an ECE-based CNT nanorefrigerator, here, significantly high coefficient of performance values of 4.1 and 6.5, and extracted heat per weight as large as 40Jg(-1) are reported for a zigzag CNT nanorefrigerator operating in an Otto-like thermodynamic cycle. This efficiency is shown to overcome that of some other ECE materials. (AU)

Processo FAPESP: 18/02992-4 - Nanoestruturas de carbono: simulação e modelagem
Beneficiário:Alexandre Fontes da Fonseca
Linha de fomento: Auxílio à Pesquisa - Regular