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태양열 담수기 다중효용부의 해수 공급유량에 관한 1차원 수치해석
임병주(Byung-Ju Lim),유상석(Sang-Seok Yu),박창대(Change-Dae Park),정경열(Kyung-Yul Chung) 대한기계학회 2016 大韓機械學會論文集B Vol.40 No.7
다중효용 태양열 담수기에서 다중효용부 각 효용단의 해수 공급유량은 효용수 증가에 따른 열에너지 감소를 고려하여 점차 줄어드는데, 선행연구에서는 효용단 별 서로 다른 공급유량 감소율을 제시하였다. 이론적으로 열에너지 감소율이 일정하기 때문에 효용단 별 서로 다른 유량감소율은 적절하지 않다. 본 논문에서는 수치해석을 통해 다중효용부의 공급유량 감소율에 따른 담수생산량 특성을 분석하였다. 해석결과 공급에너지가 같은 조건(12MJ)에서 동일한 감소율(11%)일 때와 그렇지 않을 때의 생산량 차이는 0.56%로 거의 비슷하였다. 또한 수치해석을 통해 고온의 배기가스로부터 얻은 공급 에너지량에 따라 다중효용부 해수공급유량의 최적값을 도출하였다. 최적 유량은 에너지의 공급 형태에 따라 선형적으로 증가하거나 증가 후 평형상태에 도달하는 현상이 발생하였다. In a multi-effect solar distiller, a feeding rate of seawater to each effect should be decreased as the effect number is increased. In previous studies, the feed rate of seawater was not reduced evenly between the effects, which is unreasonable, since the thermal energy input of each effect decreases by the same amount. In this work, numerical analysis was carried out in order to elucidate this discrepancy. The results showed that the amount of distillates produced was almost the same for both evenly and unevenly reduced flow rates between the effects. Optimum feed rates of seawater with various energy inputs from exhaust gas heat exchanger were also obtained. The results showed that the optimum feed rate of the first effect increased linearly or reached a steady state depending on the heat flux.
임병주(Byung-Ju Lim),이태구(Tae-Gu Lee),박창대(Chang-Dae Park),정경열(Kyung-Yul Chung) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.11
In order to localize a pilot-acting solenoid operated valve (SOV) using in nuclear power plant which has been heavily dependent on imports specially, a foreign company, we developed the new pilot mechanism which is applicable to the SOV by way of reverse engineering for the SOV. The new mechanism has advantages to simplify a manufacturing process and to reduce the number of critical components such as O-ring. After making the trial SOV applying to body, we confirmed the SOV with the new pilot mechanism is normally operating in normal environment and has a good performance for leak test.
임병주(Byung-Ju Lim),박창대(Chang-Dae Park),정경열(Kyung-Yul Chung) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
In order to develope technology for EQ test which is important process to localize a solenoid operated valve using in nuclear power plant, we analyzed a related regulation, test procedure, condition, equipment and acceptance criteria. EQ test of solenoid operated valve was composed with functional test, normal condition test and accident condition test. The functional test performs to measure equipment performance and the other tests to simulate environmental condition of nuclear power plant. Though resistance characteristic tests are not included in functional test of IEEE standard, the tests such as dielectric strength test and resistance test might be performed due to significance of solenoid electrical performance.