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EIX 전극 제작과 이온교환 개발에 관한 연구 (Ⅰ) - EIX 전극 제조와 특성 평가 -
이원식,김래현,정택상,오세중 ( W . S . Lee,L . H . Kim,T . S . Jung,S . J . Oh ) 한국공업화학회 1995 공업화학 Vol.6 No.4
본 연구에서는 실험실에서 합성한 ZrP와 상업용 Amberlite IRP-64, Amberlite IRC-718 이온교환 수지를 SBR과 Epoxy 결합제로 사용하여 EIX전극을 제조하고, 전극전위에 따라 제조한 EIX 전극에 대한 구리이온의 흡·탈착성능과 특성을 고찰하였다. 이온의 전달특성은 결합제의 종류에 따라서 가장 크게 영향을 받았으며, 흡착공정에서 최대의 흡착속도를 보이는 최적의 전극 전위가 존재함을 확인할 수 있었으며, 탈착공정에서는 사용한 수지와 금속이온의 흡착력에 의해서 가장 크게 영향을 미쳤다. EIX electrodes containing cation exchange resins(ZrP, Amberlite) and binders(SBR, Epoxy) were fabricated in different drying conditions of various temperature and pressure. The performance and physical properties of those were measured and the adsorption and desorption kinetics in copper sulfate solution were investigated at the various electrode potentials. The ionic transport in EIX electrode was seriously affected by binder system. The maximum adsorption rate of copper was obtained at optimum cathodic potential. In elution process, the desorption rate was significantly influenced by adsorpted force between the resin and the metal ions.
알루미늄 다공성소재를 이용한 RFID Tag용 열차폐부품 개발
방제오,이효수,정택균,이민하,김범성,정승부,Bang, Jae-Oh,Lee, Hyo-Soo,Jung, Taek-Kyun,Lee, Min-Ha,Kim, Bum-Sung,Jung, Seung-Boo 한국분말야금학회 2011 한국분말재료학회지 (KPMI) Vol.18 No.2
The RFID (Radio-Frequency Identification) is an automatic identification method, relying on storing and remotely retrieving data using devices called RFID tags or transponders. Some RFID tags have been used in severe environment of temperature ranged from $200^{\circ}C$ to $250^{\circ}C$ for a long time and may cause serious problems such as signal error, short life cycle and explosion. Conventionally, the RFID tags for high temperature applications consisted of Fe-alloy housing part, ceramic powder and RFID sensor. However, it has disadvantage of heavy weight, signal noise and heat shield capability. In this study, we newly applied the aluminum porous materials fabricated by polymer leaching process into RFID tags in order to improve heat shielding ability, and compared the properties of RFID tag inserted by aluminum porous with the conventional one.
LVDC 배전계통의 접지방식에 따른 인체안전 및 계통영향 분석
오윤식(Yun-Sik Oh),한준(Joon Han),권기현(Gi-Hyeon Gwon),김두웅(Doo-Ung Kim),노철호(Chul-Ho Noh),정택현(Tack-Hyun Jung),김철환(Chul-Hwan Kim) 대한전기학회 2014 전기학회논문지 Vol.63 No.5
Recent developments and trends in the electric power consumption clearly indicate an increasing use of DC in end-user equipment. According to the trends, new DC power distribution systems have been researched and developed although we presently enjoy a predominantly AC power distribution system. We can use various grounding schemes in DC distribution system as well as in AC distribution system to protect human body and equipments. However, we need to evaluate carefully which grounding scheme is appropriate for a specific system before applying those schemes. In this paper, we analyze the human safety and system effect according to various grounding schemes in Low Voltage DC (LVDC) distribution system. Some components in LVDC distribution system are modeled and computer simulations are conducted by using ElectroMagnetic Transient Program (EMTP).
김상헌,김경호,선종오,조영갑,정택형,김정현,이관희,Kim, Sanghaun,Kim, Gyeong-Ho,Sun, Jong-Oh,Cho, Yeong-Garp,Jung, Taeck-Hyung,Kim, Jung-Hyun,Lee, Kwan-Hee 한국압력기기공학회 2016 한국압력기기공학회 논문집 Vol.12 No.1
The Second Shutdown Drive Mechanism (SSDM) provides an alternate and independent means of reactor shutdown. The Second Shutdown Rods (SSRs) of SSDMs are poised at the top of the core by the hydraulic force driven from a hydraulic system during normal operation. The rods drop by gravity when a trip is commended by a Reactor Protection System, Alternate Protection System, Automatic Seismic Trip System or operator by means of power off solenoid valves of hydraulic system. This paper describes the test results of seismic qualification of a prototype SSDM hydraulic system to demonstrate that its structural integrity and operability (functionality) are maintained during and after seismic excitations, that is, an adequacy of the SSDM design. From the results, this paper shows that the SSDM hydraulic system satisfies all its design requirements without any malfunctions during and after seismic excitations.