Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Gilhwan Cha"'
Publikováno v:
Micromachines, Vol 3, Iss 1, Pp 10-20 (2012)
We present a switchable thermal interface based on an array of discrete liquid droplets initially confined on hydrophilic islands on a substrate. The droplets undergo reversible morphological transition into a continuous liquid film when they are mec
Externí odkaz:
https://doaj.org/article/5b8229db28664ddea1aa66676f1b7b2c
Publikováno v:
Sustainability; Volume 13; Issue 24; Pages: 13783
Sustainability, Vol 13, Iss 13783, p 13783 (2021)
Sustainability, Vol 13, Iss 13783, p 13783 (2021)
With the widespread use of electric vehicles, their charging power demand has increased and become a significant burden on power grids. The uncoordinated deployment of electric vehicle charging stations and the uncertainty surrounding charging behavi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::debaba00fcaacb854f79a7d12aee1205
Publikováno v:
Cha, G; Kim, C-J; & Ju, YS. (2016). Thermal conductance switching based on the actuation of liquid droplets through the electrowetting on dielectric (EWOD) phenomenon. APPLIED THERMAL ENGINEERING, 98, 189-195. doi: 10.1016/j.applthermaleng.2015.11.098. UCLA: Retrieved from: http://www.escholarship.org/uc/item/583845zn
Thermal conductance switches enable active and reconfigurable thermal control and management for a wide variety of applications. We demonstrate a thermal conductance switch based on the actuation of liquid droplets in a co-planar electro-wetting-on-d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9ca857b3afe68b825ee6f35cd7a48e48
https://doi.org/10.1016/j.applthermaleng.2015.11.098
https://doi.org/10.1016/j.applthermaleng.2015.11.098
Autor:
Gilhwan Cha, Y. Sungtaek Ju
Publikováno v:
Sensors and Actuators A: Physical. 189:100-107
The pyroelectric effect offers an intriguing solid-state approach for harvesting ambient thermal energy to power distributed networks of sensors and actuators that are remotely located or otherwise difficult to access. There have been, however, few d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::be1b2344dcc99fea513045f6a4aa7396
https://doi.org/10.1016/j.sna.2012.09.019
https://doi.org/10.1016/j.sna.2012.09.019
Publikováno v:
Journal of Composite Materials. 47:65-75
We report a novel strategy that exploits the unique mechanical characteristics of microscale liquid elements to enable versatile multifunctional integration of brittle components into load-bearing structures. The preliminary feasibility of this integ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dd94fe8dac100749607862d7a1d1c6e5
https://doi.org/10.1177/0021998312451295
https://doi.org/10.1177/0021998312451295
Publikováno v:
Journal of Applied Physics; May2010, Vol. 107 Issue 9, p09B505-1-09B505-3, 3p
Publikováno v:
2012 IEEE 25th International Conference on Micro Electro Mechanical Systems (MEMS).
Pyroelectric thermal energy harvesters are intriguing alternatives to thermoelectric devices due to their high thermodynamic efficiency and reduced heat sink requirements. We report a concept for pyroelectric energy harvesters that utilize liquid-bas
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::90fcd4de6b91dc0cd801c4d88ea326d6
https://doi.org/10.1109/memsys.2012.6170414
https://doi.org/10.1109/memsys.2012.6170414
Publikováno v:
Journal of Heat Transfer. 133
Micro heat pipes incorporating advanced wicks are promising for the thermal management of power electronics. We report the heat transfer performance of superhydrophilic Cu micropost wicks fabricated on thin silicon substrates using electrochemical de
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f41453cc0a156af061a47cf2f392caf8
https://doi.org/10.1115/1.4004168
https://doi.org/10.1115/1.4004168
Autor:
Y. Sungtaek Ju, Gilhwan Cha
Publikováno v:
Volume 12: Micro and Nano Systems, Parts A and B.
Ability to establish and break thermal contacts in a reversible manner is important in a wide range of applications. These include active thermal conductance control for bolometers [1], pulsed thermoelectric cooling [2], chip scale atomic clocks, and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bf42afb5396d383b102b67d003ff6a75
https://doi.org/10.1115/imece2009-12429
https://doi.org/10.1115/imece2009-12429
Autor:
Gilhwan Cha, Y. Sungtaek Ju
Publikováno v:
Volume 13: Nano-Manufacturing Technology; and Micro and Nano Systems, Parts A and B.
We consider different sources of potential systematic errors in the thermal interface resistance measurements. Sub-continuum heat conduction and spatial non-equilibrium between electrons and phonons in a metal may lead to overestimation of the therma
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::536ef8103ff4d0eb13a992b4283db1e9
https://doi.org/10.1115/imece2008-67511
https://doi.org/10.1115/imece2008-67511