Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Seongir Cheong"'
Autor:
Yujin Hwang, Soo Hyung Kim, Doohyun Kim, Kwangho Lee, Jaekeun Lee, Seongir Cheong, Young Min Choi, Chang-Gun Lee
Publikováno v:
Journal of Mechanical Science and Technology. 25:2853-2857
Various carbon-based particles such as graphite, carbon black, graphite nanofibers and carbon nanotubes were dispersed in mineral oil to systematically examine the effect of the size and shape of particles on the properties of friction performance. A
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a84b77cd7dfda00ee27ae619c02bc2bc
https://doi.org/10.1007/s12206-011-0724-1
https://doi.org/10.1007/s12206-011-0724-1
Publikováno v:
International Journal of Air-Conditioning and Refrigeration. 18:221-228
There are many attempts to use a fuel cell system as a residential power generation system. The purpose of this study is to investigate the optimal design of a water tank for a hot water system when the fuel cell co-generation system is combined with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eb4222ce3f168ea3cecc5fb93f2295f2
https://doi.org/10.1142/s2010132510000113
https://doi.org/10.1142/s2010132510000113
Publikováno v:
Current Applied Physics. 10:S22-S25
A coolant operating condition in a fuel cell stack is an important factor to determine the temperature distribution which affects a fuel cell performance and relative humidity at its inside. In this study, the effect of the coolant operating conditio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4e08920b3038bb5c4a3d2331f08e4eb4
https://doi.org/10.1016/j.cap.2009.11.008
https://doi.org/10.1016/j.cap.2009.11.008
Autor:
Kwangho Lee, Jae-Keun Lee, Yeong-Ho Lee, Yujin Hwang, Young-Man Jeong, Jae-Do Song, Seongir Cheong, Dong-Hyuk Lee
Publikováno v:
Science in China Series E: Technological Sciences. 53:80-84
The heating performance of a water-to-refrigerant type ground source heat pump system is represented in this paper under the actual working conditions of the GSHP (ground source heat pump) system during the winter season of 2008. Ten heat pump equipm
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ca8bb55a202146d84cb246b9d7ae77f5
https://doi.org/10.1007/s11431-009-0422-8
https://doi.org/10.1007/s11431-009-0422-8
Autor:
Soo Hyung Kim, Yujin Hwang, Laeun Kwon, Jae-Keun Lee, Kwangho Lee, Seongir Cheong, Young Min Choi
Publikováno v:
Tribology Letters. 35:127-131
A disc-on-disc type tester was used to examine the role of fullerene nanoparticles dispersed in a mineral oil-based lubricant. In the friction test, the friction coefficient of the disc specimen immersed in the nano-oil was significantly lower than t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1c6b426d49de0c5d2097a40db6a1a7d3
https://doi.org/10.1007/s11249-009-9441-7
https://doi.org/10.1007/s11249-009-9441-7
Autor:
Jaekeun Lee, Younghwan Kwon, Yujin Hwang, Daeseung Hong, Chengguo Li, Doohyun Kim, Seongyong Moon, Seongir Cheong, Yonghyeon Cho
Publikováno v:
Current Applied Physics. 9:e119-e123
To investigate the effect of nanofluids on convective heat transfer, an experimental study was performed through a circular straight tube with a constant heat flux condition in the laminar and turbulent flow regime. Stable nanofluids, which were wate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::39f986887bdb0544c60bd4b82b79c1ca
https://doi.org/10.1016/j.cap.2008.12.047
https://doi.org/10.1016/j.cap.2008.12.047
Publikováno v:
Current Applied Physics. 9:e128-e131
It has been recognized that the friction coefficient decreases with decreasing viscosity of lubricant oil in lubrication. In general, as the viscosity of the lubricant decreases, the wear rate increases due to a decrease of load-carrying capacity of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5abc7cf1b66784b5c21262ec492b85bd
https://doi.org/10.1016/j.cap.2008.12.054
https://doi.org/10.1016/j.cap.2008.12.054
Autor:
Jae-Keun Lee, Yujin Hwang, Soo Hyung Kim, Young-Man Jeong, Young-Chull Ahn, Jong-Ku Lee, Seongir Cheong
Publikováno v:
Powder Technology. 186:145-153
This paper presents an experimental study on the homogeneous dispersion of nanoparticles in nanofluids. In this study, various physical treatment techniques based on two-step method, including stirrer, ultrasonic bath, ultrasonic disruptor, and high-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8c6fee1c2cf8556336eff50a248a2e74
https://doi.org/10.1016/j.powtec.2007.11.020
https://doi.org/10.1016/j.powtec.2007.11.020
Publikováno v:
Journal of Mechanical Science and Technology. 22:788-797
The appropriate capacity of a ventilation system based on the air infiltration rate in Korean classrooms is investigated to obtain optimal design conditions for ventilation systems. Theoretical and the experimental analyses are performed to estimate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c938b802ad2ec52833974022df734960
https://doi.org/10.1007/s12206-008-0111-8
https://doi.org/10.1007/s12206-008-0111-8
Autor:
Yujin Hwang, B.C. Ku, Jae-Keun Lee, Chun-Sung Lee, Seongir Cheong, Yunjin Jung, C.H. Lee, Seok Pil Jang
Publikováno v:
Thermochimica Acta. 455:70-74
Nanofluid is a kind of new engineering material consisting of nanometer-sized particles dispersed in base fluid. In this study, various nanoparticles, such as multi-walled carbon nanotube (MWCNT), fullerene, copper oxide, and silicon dioxide have bee
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dd2dacda7d0cd9159c287df2e97b48d2
https://doi.org/10.1016/j.tca.2006.11.036
https://doi.org/10.1016/j.tca.2006.11.036