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초대형 선박 폐열 열전발전시스템 내부 열전달 현상 규명
서명진(Myeong Jin Seo),홍성빈(Seong Bin Hong),김재관(Jae Gwan Kim),정재호(Jae Ho Jeong) 한국유체기계학회 2022 유체기계 연구개발 발표회 논문집 Vol.2022 No.11
As environmental regulations on exhaust gases are strongly enforced around the world, and marine transportation is also being gradually strengthened. It is important to improve the performance of the heat exchanger to improve the efficiency of the ship by using the thermoelectric power generation system. Applying a thermoelectric power generation system to ship, it is possible to improve the efficiency of the ship by recovering the ships waste heat. The heat transfer phenomenon according to the location of the heat exchanger was through numerical analysis, and the experimental values were cross-verified by comparing the results with actual experiments. In the CFD, Porous Domain was used to reduce time and obtain high-accuracy results. Comparing of the TEM and the Porous Domain, it was confirmed that the error rate was less than 0.5%. Through the analysis of the entire thermoelectric power generation system, the internal flow field, internal temperature field, internal pressure field, and temperature of the thermoelectric module were compared. Based on this, comparison verification was performed with actual experimental values. The error is analyzed as the difference between the CFD and the adiabatic efficiency of the experiment. In this study, a numerical analysis methodology for the internal heat transfer phenomenon of a thermoelectric power generation system was established.
Realization of Water Flow Control System with Remoted Electrical Valve for Smart Fish Farm
Myeong Jin Seo(서명진),Ji Young Kim(김지영),Su Min Lee(이수민),Amarnathvarma Angani(아마르나스바르마 앙가니),Kyoo jea Shin(신규재) 대한전자공학회 2019 대한전자공학회 학술대회 Vol.2019 No.6
In this paper aim to realization of water control system with electrical valve for smart fish farm, this smart fish farm is run without any human involvement , which means control temperature, pH, oxygen, and water level in this case wasting high quantity of water and spending more money for maintenance purpose. From this point of view we proposed new aquaculture system with electrical valve, that system is called a vertical aquarium management system. The purpose of the electrical valve is to regulate the flow and to maintain the constant temperature of water in the aquarium. After attaining the required water level and temperature level, the electrical valve will be automatically closed to stop the water inflow. This electrical valve is controlled by level sensors and temperature sensors that are attached to the tanks. Advantages of the electrical valve are Selfcleaning and low maintenance cost of the aquarium. This process is operated by a micro-controller. This electrical valve is specially designed to meet the requirements of the vertical aquarium energy management system (VAEMS).
LNG 운반선 PCHE 열교환기 내 상변화에 대한 수치해석
류원석(Won-Seok Ryoo),서명진(Myeong-Jin Seo),유종근(Jong-Keun Yu),정재호(Jae-Ho Jeong) 한국유체기계학회 2022 유체기계 연구개발 발표회 논문집 Vol.2022 No.11
In this study, we studied the ice accretion that occurs in the next-generation heat exchanger, the PCHE channel. The study simulated heat exchange and phase changes caused by temperature differences between fluids through Hot Water and LNG flowing into the PCHE channel. First, setting the temperature of Hot Water to 10-80 degrees,and identified the heat exchange according to each temperature through CFD simulation. Next setting the temperature of Hot Water to 10, 50 and 90 degrees, and identified the ice accretion in the channel according to each temperature through CFD simulation.
Thermal Management System in Electric vehicle Battery Pack Using Phase Change Material
Him Chan Kim(김힘찬),Eui song Kim(김의송),Hyeon Jung Lee(이현중),Myeong JIn Seo(서명진),Teressa(테레사),Amarnathvarma Angani(아마르나스바르마 앙가니),Kyoo Jae Shin(신규재) 대한전자공학회 2019 대한전자공학회 학술대회 Vol.2019 No.6
Thermal Management in the Electric Vehicel is essential to improve the battery performance. This paper aims at the investigating the performance of Phase Change Material to prevent the thermal runway in the EVs. The better phase change materials are identified through simulation, based on heat transfer rate through the PCM. The design of the battery module was done in auto cad and the analysis done in ANSYS CFD software. The three pcms like paraffin wax, RT and Expanded Graphite were selected for the comparison. From the simulation result it was identified that the battery pack temperature maximum is not beyond the 60℃ (safe operating temperature range) in all test condition with the Expanded Graphite pcm material. The results were validated with numerical calculation and shown good agreement based on data collected at different temperatures.