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Moon-Hyun Chun;Jee-Won Park
- Nuclear Engineering and Technology
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- v.17 no.1
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- pp.45-52
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- 1985
A two inverted U-tubes condenser was constructed from transparent materials to study the heat removal capability of steam generators under filmwise reflux condensation mode. Essentially, two sets of experiments were performed: (1) the first dealt with the reflux condensation length, and (2) the second dealt with the flooding points with and without the presence of a noncondensible gas in the steam flow, and the effect of the flooding time. In addition, experimental results are compared with the predictions of analytical models.
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Park N. H.;Koh H. Y.;Jeong J. W.;Kang T. S.
- The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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- v.15 no.4
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- pp.362-371
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- 1986
In the normal Refrigeration process, the condensation heat of refrigerant s not been used because of its low-temperature waste heat. To recover the condensation waste heat of R-12 refrigerator, a drying and hot water system was designed and experimented. The results obtained were summarized as follows: 1. As the temperature a temosphere was increased, the temperature of discharge gas of compressor was increased. And the temperature was $80-84^{\circ}C$ for air condensing type and was $68-71^{\circ}C$ for water condensing type during summer. 2. The condensation waste heat could be obtained up to $50-55^{\circ}C$ of drying heat-source and Hot water in summer. In this case, recovered rate was about $73\%$. And the more temperature of drying Heat-source and Hot water were increased, the more a recovered rate were decreased. 3. When comparing drying characteristics of Agro-products in dryer of waste heat utilization and Hot air, there was no quality difference in products. But drying time of the former was 3 Hours longer than the latter. 4. The condensation waste heat of compressor could be applied into the drying of marine products, the predrying of agro-products and making hot water. And showed high possibility of the waste heat using in low-temperature storage.
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Lee, Jong-Seung;Yeo, Seok-Ki;Park, Chin-Ho
- 한국정보디스플레이학회:학술대회논문집
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- 2003.07a
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- pp.897-900
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- 2003
Chemical vapor condensation (CVC) reactor was investigated for the deposition of Parylene-N thin films as the passivation layer for organic light emitting diodes (OLEDs). Several gas inlet manifold designs were tested to improve the deposition rate and its uniformity, and it was found that proper inlet design is crucial to get the desired film properties. Process characterization was also performed with the modified inlets to optimize the process variables.
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Hwang, Jun Y.;Park, J.Y.;Kang, K.;Kim, J.H.;Kim, K.J.;Lee, M.S.
- 한국신재생에너지학회:학술대회논문집
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- 2011.05a
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- pp.96.2-96.2
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- 2011
Water transport through the microporous membrane was modeled considering capillary condensation as well as capillary flow in porous media as a function of pore diameter and relative humidity at the surface. The present model was adopted by the numerical simulation of non-isothermal, non-homogenous flow in a shell and tube typed gas to gas membrane humidifier for PEMFC (proton exchange membrane fuel cell) and the result shows good agreement with experimental data.
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Uhm, Y.R.;Lee, M.K.;Rhee, C.K.
- Journal of the Korean Magnetics Society
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- v.17 no.2
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- pp.99-102
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- 2007
The Cu oxide nano powders were synthesized by levitational gas condensation (LGC) method and their high heterogeneous catalytic effects of oxidation of 2,3,5-trimethyl-1,4-hydroquinone (TMHQ) and catalase activity were studied. The nano powders consist of mainly $Cu_2O$. The catalytic effect which was clarified by the oxidation of TMHQ and the activity of catalase, was found to depend on the amount of $Cu_2O$ phase and the particle size.
https://doi.org/10.4283/JKMS.2007.17.2.099 인용 PDF KSCI