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인터넷을 이용한 냉동기 모니터링 및 원격 제어 관리방법
지성남(Sung-Nam Ji),장시혁(Si-Hyuk Jang),고설린(Sul-Lin Ko),정봉철(Bong-Chul Chung) 대한설비공학회 2010 대한설비공학회 학술발표대회논문집 Vol.2010 No.6
A Human life is definitely changing as the Internet is developed and supplied. Recently, people and companies can conduct their work by online with various technologies using the Internet. However, lots of equipments in the building are still managed by many engineers. In case of chiller, engineers in building can monitor chiller’s state using their own PLC(Programmable Logic Controller), or other monitoring systems, but they usually require service from manufacturer when the chillers get some problems. Manufacturers would be able to offer better service to customers, and bring a solution quickly if service engineers in the manufacturer can monitor chiller’s state in the service center. In this paper, the remote control system which can control chillers in the service center using the Internet technology is introduced.
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신대윤,지성남,문옥란,김지영,서동우,조영관,Shin Dae-Yewn,Ji Sung-Nam,Moon Ok-Ran,Kim Ji-Yeong,Suh Dong-Woo,Cho Young-Kwan 한국환경보건학회 2004 한국환경보건학회지 Vol.30 No.5
The objective of this investigation was to evaluate applicability of precoat filtration that can be substituted for rapid sand filter of conventional water treatment system(CWTS). Precoat filter used in this experiment are candle filter. Element disk of candle are pore size $10{\mu}m(R),\;20{\mu}m(B)$ And diatomaceous earth are cake pore size $3.5{\mu}m$(Standard Super- Cel; A), $7{\mu}m$(Hyflo Super-Cel; B) and $17{\mu}m$(Celite 545RV; C). $2kg/m^2$ diatomaceous earth is used for precoating, it coated candle in $5{\sim}6mm$ thickness. 1. Al adsorption dosages by diatomaceous earth used in experimental we Hyflo Super-Cel 0.843mg/g, Standard Super-Cel 0.782 mg/g and Celite 545RV 0.766 mg/g. 2. Filtrate of precoat filter during 60min are R-C combination 20.7($m^3/m^2$)>B-C 18.3($m^3/m^2$)>B-B 15.0($m^3/m^2$)> R-B 12.9($m^3/m^2$)> R-A 11,093($l/m^2$). 3. Water quality of precoat filter effluent are thus. $KMnO_4$ consumption are $1.10{\sim}2.20mg/l$, removal rate are $30.9{\sim}65.6\%$. They are R-A 1.10(mg/l)(removal rate $65.6\%$). R-C(2.20 mg/l)(removal rate $30.9\%$). 4. $Al^{3+}$ are not detected with all combination, removal rate $100\%$. 5. Considering water quality and flux, continued running time of R-A combination is 7 hr. Accumulated filtrate are $74.4 m^3/m^2$, average flux is $177.2 l/m^2{\cdot}min$. And filtrate per diatomaceous earth 1g are 37.2 l. 6. R-A effluent's water quality are $KMnO_4$ Consumption 1.10(mg/l), DOC 1.161 mg/1, Al 0.0 mg/1, $UV_{254}$ 0.016/cm, Turbidity 0.1(NTU). R-A combination is suitable to precoat filtration for the settling basin effluent treatment.
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규조토여과 및 활성탄흡착 공정을 이용한 용수처리에 관한 연구
신대윤,김지열,지성남,Shin Dae-Yewn,Kim Ji-Yeoul,Ji Sung-Nam 한국환경보건학회 2004 한국환경보건학회지 Vol.30 No.5
I performed the research about the drinking water treatment by precoat filtration and activated carbon adsorption process in the D water treatment plant at Gwangju. D water treatment plant inlet water is supplied from Juam lake in Jeollanamdo. The results are as follows; 1. Element disk used in this experiment are R(pore size $10{\mu}m$), B(pore size $20{\mu}m$). And diatomaceous earth are A(cake pore size $3.5{\mu}m$), B(cake pore size $7{\mu}m$) and C(cake pore size $17{\mu}m$) 2. Filtrate of precoat filter during 30 min are B-C 10.2 > BB 5.7 > R-A 5.4 ($m^3/m^2$). 3. The water quality through B-C+AC and R-A+AC are DOC 1.76 mg/1, 1.288 m/l respectively. 4. total THMs produced by chlorination are $84.2{\mu}g/l$(B-C+AC), $66.11{\mu}g/l$ (R-A+AC), $97{\mu}g/l$ (rapid sand filtration water) respectively. 5. The R-A+AC and B-C+AC process can be substitute of CWTS.
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Tylosin Production by Mutant Resistant to Oleic Acid
최두복,문옥란,윤미란,지성남,신대윤,Choi, Du-Bok,Choi, On-You,Moon, Ok-Ran,Yoon, Mi-Ran,Ji, Sung-Nam,Shin, Dae-Yewn Korean Society of Environmental Health 2005 한국환경보건학회지 Vol.31 No.5
Streptomyces fradiae로부터 Tylosin을 효율적으로 생산하기 위해 지방산 내성균주을 분리 했다. 여러 지방산중에서 oleic acid 1.6 g/l 이상이 첨가될 때 세포 성장이 완전히 저해 되었다. 그러나 oleic arid 1.2 g/l에서 얻어진 TM-224-1 균주는 최대 균체농도와 tylosin 생산이 얻어졌다. 또한 oleic acid 소비속도는 parent strain 비해 3.8배 증가했다. Oleic acid 내성균주, TM-224-1 균주와 parent strain을 이용해서 jar fermentor에서 균체농도, tylosin 생산, 그리고 rapeseed oil 소비를 표준조건하에 5일동안 비교하였다. TM-224-1 균주을 이용할 경우 균체 농도는 초기에 parent strain비해 증가했으나 배양중반부터는 감소하기 시작했다. rapeseed oil 소비의 경우는 거의 비슷했다. 그러나 Tylosin 생산 수율은 parent strain 비해 약 3.2배 증가했다. When rapeseed oil as the carbon source was used for tylosin production from Streptomyces fradiae TP-1239 was very sensitive to oleic acid. Cell growth was restrained by adding 0.8 g/l of oleic acid to the culture broth. Mutant strain TM-224-1 resistant to 1.2 g/l of oleic acid was obtained by screening in solid and liquid media containing oleic acid. The uptake rate of oleic acid by TM-224-1 was approximately 3.8 fold higher than the parent strain. For comparing the TM-224-1 and the parent strain, batch cultures were carried out in a jar fermentor. Cell growth of TM-224-1 strain was higher than the parent strain after two days of culturing. However, after four days of culturing, it was similar to that of the parent strain. The amount of rapeseed oil consumed by TM-224-1 and the parent strain were 60.5 and 78.2 g/l, respectively. The production and yield of tylosin was aproximately 2.0 and 3.2 fold higher than the parent strain, respectively. From these results, it was concluded that this mutant, which was resistant to oleic acid, has improved tylosin production.
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