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인산형 연료전지(PAFC)기반 복합에너지 허브 시스템 해석
정윤주(Yoonju Jung),박천기(Chungi Park),주현철(Hyunchul Ju) 대한기계학회 2020 대한기계학회 춘추학술대회 Vol.2020 No.12
Natural gas (NG) is delivered to homes and businesses through a complex pipeline network consisting of a numerous low-pressure local distribution lines from a high-pressure main supply line. Now, the decompression energy is lost, and research on replacing the throttle valve with turbo expander generators(TEGs) to convert loss into additional power is being conducted. In this study, a multi-energy hub system composed of a phosphoric acid fuel cell (PAFC) and TEG module was analyzed through ASPEN-HYSYS® modeling and simulation, and the core concept is the efficiency of the entire system. The goal is analyzing overall system that can produce about 1.73 MWe of power in TEG module. However, in hydrogen production mode, an additional heat source is required to fully transfer and operate the expansion work generated by the NG flow in the TEG system to the PAFC stack. This study explains the advantages of the proposed multi-energy hub system in terms of thermal integration and overall efficiency but shows that the system configuration and operation must be optimized to further advance the technology.
오픈폼을 이용한 120W급 동축반전 축류팬에 대한 수치해석 연구
이명성(Myungsung Lee),정윤주(Yoonju Jung),장지은(Jieun Jang),김주한(Joo-Han Kim) 대한기계학회 2016 대한기계학회 춘추학술대회 Vol.2016 No.12
Due to the restriction of energy consumption and requirement of product size, a compact axial fan is highly demanded in various industrial fields. The counter-rotating axial fan could be a promising way to achieve these demands with decreasing rotational speed and increasing axial speed for the flow downstream of the fan. The present paper deals with a numerical simulation for an 120W counter-rotating axial fan by using OpenFOAM code which is free and open numerical solvers for computational fluid dynamics. The incompressible full 3-D Navier-Stokes equation is solved with the frozen rotor method to consider the rotating motions of the front and rear rotors of the counter-rotating axial fan. The numerical results are compared to the experimental data such as static pressure rise with various air flow rate, and it shows good agreements. The results of the present study could provide useful data for optimal aerodynamic design of the counter-rotating axial fan.
중년기 여성의 위기감이 심리사회성숙성에 미치는 영향연구
정윤주 ( Jung¸ Yoon Ju ) 한국정서행동장애학회 2021 정서ㆍ행동장애연구 Vol.37 No.3
본 연구는 개인과 사회에서 중요하게 작용되는 중년기 여성 위기감이 심리사회성숙성에 미치는 영향을 파악하는데 목적이 있다. 이를 검증하기 위해 인천과 경기도, 서울에 거주하고 있는 중년기 여성 40~60세를 대상으로 설문지를 배부하였으며, 최종적으로 507부를 분석에 사용하였다. 수집된 자료는 AMOS 22.0와 SPSS 22.0을 활용하여 위계적 회귀분석, 상관분석, 기술통계분석을 실시하였다. 본 연구의 주요 결과를 요약하면. 첫째, 중년기 위기감 인식은 평균 값이 2.79(SD=0.51)으로 나타났으며, 심리사회성숙성 인식은 전체 평균이 3.32(SD=0.45)으로 나타났다. 둘째, 중년기 여성의 위기감과 심리사회성숙성과의 상관관계는 부(-)적인 관계를 보이는 것으로 나타났다. 즉, 중년기 위기감이 높을수록 심리사회성숙성에 대한 인식수준이 상대적으로 낮아지는 것을 확인하였다. 셋째, 중년기위기감 하위요인 중, 생의 불만족도, 자녀관계 불만족도, 활력상실감, 결혼 불만족도에 대해서는 유의미한 부(-)의 영향을 미치는 것으로 나타났다. 본 연구의 결론은, 중년기 여성은 심리사회 성숙성을 통해서 자신의 삶의 과정에 나타날 수 있는 위기감에 대한 대처능력을 끌어올릴 수 있다. 또한, 개인의 인생 주기 발달과정에서도 중년기에 자기능력을 함양시킬 수 있다. 본 연구의 의의는, 중년기 여성의 삶의 질을 높이고, 성숙성을 높이는데 필요한 구체적인 적용과 성과로 이어지는 토대를 마련하는 데 있다. This study aims to identify the influence of middle-aged women’s crisis that plays an important role in individuals and society on their psychosocial maturity. To verify this, questionnaires were distributed to middle-aged women aged 40 to 60 living in Incheon, Gyeonggi, and Seoul, and finally 507 copies were used for the analysis. Hierarchical analysis, correlation analysis, and descriptive statistical analysis on the collected data were conducted using SPSS 22.0 and AMOS 22.0. The main results of this study are as follows. First, the average value of mid-life crisis was 2.79 (SD=0.51), and the average value of psychosocial maturity was 3.32 (SD=0.45). Second, the mid-life crisis had a negative(-) correlation with psychosocial maturity, which means that the higher mid-life crisis, the lower the level of recognition on psychosocial maturity relatively. Third, the middle-aged women’s crisis had a significantly negative(-) influence on dissatisfaction about life, dissatisfaction about relationship with their children, loss of vitality, and dissatisfaction about their marital life among the sub factors of mid-life crisis. This study concludes that middle-aged women could develop their ability to cope with a sense of crisis that may occur in their lives through psychosocial maturity, and that they could cultivate self-control capability in the middle years of their lives during the development of life cycle. It has a significance in that it laid the groundwork for specific applications and achievements needed for improvement in middle-aged women's quality of life and maturity.