Zobrazeno 1 - 10
of 209
pro vyhledávání: '"Nojeh, Alireza"'
Autor:
Rahman, Ehsanur, Nojeh, Alireza
Publikováno v:
Applied Thermal Engineering,224, 119993, 2023
This work investigates an alternative to thermophotovoltaics for harvesting thermal and optical energy via photon coupling and thermionic energy conversion. In this device, a heat source is radiatively coupled to a thermionic electron emitter through
Externí odkaz:
http://arxiv.org/abs/2406.13669
Autor:
Ruscher, Céline, Cortes-Huerto, Robinson, Hannebauer, Robert, Mukherji, Debashish, Nojeh, Alireza, Phani, A. Srikantha
Using large scale molecular dynamics simulations, we study the thermal conductivity of bare and surface passivated silicon nanowires (SiNWs). For the cross-sectional widths $w \le 2$ nm, SiNWs become unstable because of the surface amorphosization an
Externí odkaz:
http://arxiv.org/abs/2304.11707
Autor:
Rahman, Ehsanur, Nojeh, Alireza
Publikováno v:
The effects of electronic and photonic coupling on the performance of a photothermionic-photovoltaic hybrid solar device, Solar Energy Materials and Solar Cells, Volume 247, 2022, 111945, ISSN 0927-0248
This work presents a detailed analysis of the photothermionic-photovoltaic hybrid solar device. The electrons in this hybrid device gain energy from both the solar photons and thermophotons generated within the device, and hence the device has the po
Externí odkaz:
http://arxiv.org/abs/2209.10689
Publikováno v:
In Precision Engineering August 2024 89:46-54
Publikováno v:
Phys. Rev. B 104, 075440 (2021)
Acoustic phonons play a special role in lattice heat transport, and confining these low-energy modes in low-dimensional materials may enable nontrivial transport phenomena. By applying lowest-order anharmonic perturbation theory to an atomistic model
Externí odkaz:
http://arxiv.org/abs/2105.12154
Autor:
Rahman, Ehsanur, Nojeh, Alireza
Publikováno v:
Energy 204, 117947 (2020)
We present a comprehensive analysis of a dual, micro-gap thermionic-thermoelectric hybrid energy converter by developing a detailed theoretical model of the system. The Space-charge and near-field effects in thermionic conversion and the temperature-
Externí odkaz:
http://arxiv.org/abs/2006.03688
Publikováno v:
ACS Nano (2021)
Heat propagation in quasi-one dimensional materials (Q1DMs) often appears paradoxical. While an isolated Q1DM, such as a nanowire, carbon nanotube, or polymer, can exhibit a high thermal conductivity \k{appa}, forests of the same materials show a red
Externí odkaz:
http://arxiv.org/abs/2005.10685
Autor:
Rahman, Ehsanur, Nojeh, Alireza
Publikováno v:
Phys. Rev. Applied 14, 024082 (2020)
We investigate the performance of a micro gap vacuum thermionic energy converter considering the loss mechanisms due to the space charge effect and interelectrode radiative heat transfer. The dependencies of the space charge effect and near-field rad
Externí odkaz:
http://arxiv.org/abs/2006.12199
Publikováno v:
Phys. Rev. B 101, 195408 (2020)
In this article, we address lattice heat transport in single-walled carbon nanotubes (CNTs) by a quantum mechanical calculation of three-phonon scattering rates in the framework of the Boltzmann transport equation (BTE) and classical molecular dynami
Externí odkaz:
http://arxiv.org/abs/1912.08857
Autor:
Rahman, Ehsanur, Nojeh, Alireza
We report a comparative ab-initio study of different types of adsorbates and their adsorption mechanism on the field-emission performance of single-walled carbon nanotubes by analyzing electrical properties and transport characteristics and consideri
Externí odkaz:
http://arxiv.org/abs/1902.05124