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김정석 ( Kim Jung-seok ) 숭실대학교 인문과학연구소 2002 인문학연구 Vol.32 No.-
This thesis is about the meaning of ‘The enemy’ as an object. I will make use of the phenomenology in study about what the way of poet’s understanding and recognition as an subject. Phenomenological approach is the most reasonable to simplify that explanation, because this thesis is undering both epistemological view of poet as an subject and ontological view of ‘The enemy’ as an object. And, the follow sentences are why this thesis is on the side of the epistemology than the ontology. For sementic works of poet are not obscurity, the enemy on the poetry is not also apper as a concreat object with identity. But, the enemy as bieng an object preys on the poet’s mind without a pause. The enemy is out of existence but it is still in existence. With that the enemy is in connection with the poet’s consciousness. The enemy on the condition of none examination makes the meaning clearer with a take it’s place in the conscious as an object. If the enemy is presented as the concrete object, it can be exist only as the object for fight. But, it is difficult to make with the ontology of the enemy, because the meaning of the enemy is under construction and the poet is in the very confusion. And what is made through a study on the enemy as an object is not a universal truth about the enemy. Therefore, we can make it through the study on the relation between the poet and the enemy as an opposite.
과부하 및 착 · 제상 조건에서 히트펌프 칠러의 난방성능에 관한 실험 연구
김정석(Jung Seok Kim),권영철(Young Chul Kwon),전종균(Chong Keun Chun),박삼진(Sam Jin Park),한화택(Hwa Taik Han) 대한설비공학회 2011 설비공학 논문집 Vol.23 No.7
In the present study, the performance characteristics of the heat pump chiller under heating conditions were experimentally investigated. Capacity, input power and COP under overload, frost and defrost conditions were obtained. The experimental data for the heat pump chiller were measured using the air-enthalpy calorimeter and the constant temperature water bath. At overload condition, the heating capacity and COP increase about 25.7% and 19.1%, respectively. The variations of the evaporator, the compressor outlet and the condenser temperature were obtained under frost and defrost conditions. The frost and defrost period of the heat exchanger decreases about 36.0~56.1%.
김정석(Jung-Seok Kim),이기원(Ki-Won Lee),강병국(Byung-Guk Kang),최준영(Jun-Young Choi) 대한설비공학회 2016 대한설비공학회 학술발표대회논문집 Vol.2016 No.6
Test procedures and rules may be published as formal standards by an economy’s standards-setting agency or by an international agency such as the International Standards Organization (ISO) or International Electrotechnical Commission (IEC) or both. Many countries have test procedures, standards, and labeling (mandatory and/or voluntary) schemes for a wide variety of products. ISO has developed a new standard to evaluate annual energy performance of air conditioner and heat pump, which is called as annual performance factor (APF), ISO ISO 16358-1, -2, -3:2013. In Korea we used KS 9306 to evaluate energy efficiency of heat pump for last 10 years. But, there are some differences to evaluate energy efficiency between three standards, KS 9306, AHRI 210/240, and EN 14825 at the same test unit. In the present study, the seasonal performance characteristics of heat pump with the three regional standards conditions were experimentally analyzed. In order to analyze the cooling seasonal performance factor, we compared to bin data in each regional standards and variations of EER. As a result the CSPF(cooling seasonal performance factor) calcurated with KS standard is higher than the other two standards. In addtion we found the low outdoor temperature is significant important factor to calcurated the CSPF.
틸팅 차량 모의장치개발을 위한 단순화된 철도차량 모델링
김정석(Jung-Seok Kim),송용수(Young-Soo Song),한성호(Seong-Ho Han) 대한기계학회 2004 대한기계학회 춘추학술대회 Vol.2004 No.4
This paper presents a simplified dynamics of railway vehicle for a tilting train simulator. The tilting train simulator has 6 electric-driven actuators and a visualization system with 1600㎜-diameter dome screen. The each system shares the data by ethernet. In order to analyze the dynamics of railway vehicle and transfer the results of the analysis 10 the other system of the tilting train simulator in realtime base, We assumed the tilling train as a simplified rigid body model with primary and secondary suspensions. The simplified vehicle model has a 17-DOF. Through the running analysis on the tight curve with various radius. we verified the simplified vehicle model.
끝단형상에 따른 복합소재 단일겹치기 체결부의 응력집중 저감에 관한 연구
김정석(Jung-Seok Kim),황재연(Jae-Yeon Hwang) 대한기계학회 2011 大韓機械學會論文集A Vol.35 No.3
본 연구에서는 복합소재 단일겹치기 조인트의 접착부재 형상 및 필렛 유무에 따른 응력집중 완화효과를 평가하였다. 이를 위해 6가지 서로 다른 끝단부 형상에 대해 비선형 유한요소 해석을 수행하였다. 또한, 복합재 접착부재와 접착제의 다양한 강성비에 따른 6가지 모델의 최대 전단 및 수직응력의 변화를 고찰하였다. 접착부재가 순방향 테이퍼를 갖는 모델의 경우에는 가장 높은 응력값을 보여 조인트의 접합강도가 가장 취약할 것으로 예상되었다. 이에 반해, 접착부재가 역방향 테이퍼를 갖고 필렛이 존재할 경우 가장 낮은 응력값을 보였다. 접착부재와 접착제의 강성변화에 따른 최대응력 변화를 고찰한 결과 접착부재의 강성은 클수록, 접착제 강성은 낮을수록 응력집중은 완화되었다. We evaluated the stress-reduction effect for different shapes of a composite adherend with or without a spew fillet. Six different single-lap joint specimens were modeled and assessed using nonlinear finite element analysis. Moreover, we investigated the effect of the stiffness ratio of the adherend and adhesive. The single-lap joint with normal tapering had the highest stress values, and the single-lap joint with reverse tapering and a spew fillet had the lowest stress values. The composite adherends with higher stiffness had lower stress values, and the adhesives with lower stiffness had lower stress values.
히트펌프 칠러의 난방 운전시 성능특성에 관한 실험 연구
김정석(Kim, Jung-Seok),이상재(Lee, Sang-Jae),이권재(Lee, Kwon-Jae),이수광(Lee, Soo-Kwang),엄유식(Um, Yu-Sik) 한국산학기술학회 2010 한국산학기술학회 학술대회 Vol.- No.-
본 연구에서는 난방운전시 저온 및 착상 조건에서 히트펌프 칠러의 성능을 조사하고자 하였다. 실험은 항온항습 기능을 가진 공기엔탈피 방식의 칼로리미터와 항온수조를 사용하여 수행되었으며, 실외온도조건을 설정한 후에 히트펌프 칠러의 성능을 실험으로 측정하였다. 외기조건이 -7℃에서 -15℃까지 변화함에 따라 시스템의 성능과 COP는 표준온도 조건의 실험값 보다 약 48~87%까지 감소하였다. 착상 실험에서는 시간 변화에 따라 출구수온이 표준온도를 기준으로 74% 감소하였다. 본 연구로부터 히트펌프 칠러의 설계 기초자료 획득 및 신뢰성을 확인할 수 있었다.
BIPV시스템 내부 배선처리 공간의 단열 및 결로 성능 시뮬레이션을 통한 시공방안에 관한 연구
김정석(Kim Jung-Seok),한민지(Han Min-Ji),오민석(Oh Min-Seok),김회서(Kim Hway-Suh) 대한건축학회 2010 대한건축학회논문집 Vol.26 No.12
The purpose of this study was to determine the construction method of BIPV for the electrical wiring-handling space to improve performance insulation and condensation. In the field of renewable energy systems, BIPV(Building Integrated Photovoltaic System) have characterized the original function of the electric energy production and multi-functional building envelope technology for savings of building finishes. Therefore, Integrated design and construction technology for PV Modules and frame as cladding was necessary to implement the energy production and energy saving technology. In this process, Module to improve the performance of the insulation was applied to Glass PV modules. Frame with the polyamide insulation was designed. In particular, BIPV compared to the normal window were frame problems, including corrosion and leaks due to the wiring hole for wire processing space. To prevent energy transfer through the hole, the construction of additional method were complementary. The results of this study were as follows; Silicone finish on both sides of PVC pipe installed in electrical wiring-handling space played a very important role in preventing condensation. The finish to the thickness of silicon to prevent condensation was not affected.
김정석(Jung Seok Kim),이권재(Kwon Jae Lee),이기원(Ki Won Lee),백대성(Dae Sung Back),권영철(Young Chul Kwon) 대한설비공학회 2011 대한설비공학회 학술발표대회논문집 Vol.2011 No.7
Viscosity of a magnetorheological(MR) fluid can be influenced by means of inducing a magnetic field. When the magnetic field is applied, particles arrange themselves in a network of chains, so they obstruct the flow of the oil. Owing to this, viscosity of MR fluid increases significantly. To obtain a better insight in the behaviour of MR fluid, it is necessary to visualize the interaction between the particles. The main problem with visualizing this MR fluid is the high density of particles. In the present study, the behavior of MR fluid in the channel applying the magnetic field are visualized.