Jaehyun Kim, Yongtae Kim, Wonjae Choi, Kook Young Ahn, Han Ho Song,
The objective of the proposed hybrid system is to increase the system efficiency by using the residual fuel of the anode off-gas from a solid oxide fuel cell in an internal combustion engine (ICE). In this study, a novel hybrid system using spark-assisted ignition (SAI) in an ICE operation is proposed. Since this is the first attempt of using a new combustion concept in a hybrid system, feasibility of SAI and its effect on the system operation are investigated in this study. To analyze the effect ...
Tópico(s): Catalysis and Oxidation Reactions
2019 - Elsevier BV | Applied Energy
Eun‐Ha Koh, Young‐Woo Cho, Yun‐Ja Mun, Ji Hyeon Ryu, Eun‐Jin Kim, Dae Seob Choi, Kook-Young Maeng, Jaehee Han, Dawon Kang,
Little is known about the biological role of human mammaglobin (hMAM) that is considered as a promising marker for breast cancer. Here, we investigated hMAM's role related to migration and invasion of human breast cancer cells (hBCC). Compared to normal cells, hBCC have high MAM mRNA expression levels. Of the hBCC tested, MAM mRNA expression levels were higher in noninvasive than in invasive cells. Overexpression of hMAM in breast cancer cells decreased migration and invasion, whereas knockdown of ...
Tópico(s): Cancer, Hypoxia, and Metabolism
2013 - Taylor & Francis | Cancer Investigation
Kook Young Ahn, Han-Seok Kim, Eun-Seong Cho, Jin-Hyuk Ahn, Yong Mo Kim,
Tópico(s): Radiative Heat Transfer Studies
1999 - Korean Society of Mechanical Engineers | KSME International Journal
Kook‐Young Ahn, Han-Seok Kim, Min-Gyu Son, Hokeun Kim, Yongmo Kim,
Tópico(s): Catalytic Processes in Materials Science
2002 - Korean Society of Mechanical Engineers | KSME International Journal
Seonyeob Kim, Ji Young Jung, Han Ho Song, Seung Jin Song, Kook Young Ahn, Sang Min Lee, Young Duk Lee, Sanggyu Kang,
In a previous study, a new hybrid system of molten carbonate fuel cell (MCFC) and homogeneous charge compression ignition (HCCI) engine was developed, where the HCCI engine replaces the catalytic burner and produces additional power by using the left-over heating values from the fuel cell stack. In the present study, to reduce the additional cost and footprint of the engine system in a hybrid configuration, the possibility of engine downsizing is investigated by using two strategies, i.e. the use ...
Tópico(s): Thermodynamic and Exergetic Analyses of Power and Cooling Systems
2013 - Elsevier BV | International Journal of Hydrogen Energy
Sangseok Yu, Jaeyoung Han, Sang‐Min Lee, Young Duk Lee, Kook‐Young Ahn,
A proton exchange membrane fuel cell (PEMFC) system of residential power generator (RPG) has a different operating strategy from the PEMFC system of transportation application because of its environmental difference. In this study, a dynamic simulation model of the PEMFC system is introduced, which has a model for a turbo blower, a membrane humidifier, two cooling circuits, and a PEMFC stack. The thermal efficiency of the PEMFC system for the RPG is very high because it supplies the electricity and ...
Tópico(s): Electrocatalysts for Energy Conversion
2010 - ASM International | Journal of Fuel Cell Science and Technology
Sangmin Lee, Kook Young Ahn, Young Duk Lee, Jaeyoung Han, Seokyeon Im, Sangseok Yu,
A catalytic combustor is a device to burn off fuel by surface combustion that is used for the combustion of anode off-gas of molten carbonate fuel cells by employing the catalytic combustor. Purified exhaust gas can be recirculated into the cathode channel for CO2 supply to improve thermal efficiency. The design of a catalytic combustor depends on many parameters, but flow uniformity is particularly important during the emergency shut-down of a fuel cell stack. Before the temperature control of ...
Tópico(s): Fuel Cells and Related Materials
2012 - ASM International | Journal of Fuel Cell Science and Technology
Seonyeob Kim, Agha Raza Abid, Jae Jun Jang, Han Ho Song, Seung Jin Song, Kook Young Ahn, Young Duk Lee, Sanggyu Kang,
A new hybrid system of molten carbonate fuel cell (MCFC) and homogenous charge compression ignition (HCCI) engine is suggested to improve the overall system efficiency and performance. In the proposed system, the catalytic burner in a standalone MCFC system is replaced with the HCCI engine. The HCCI engine is chosen over conventional spark-ignition or compression-ignition engines since it has been demonstrated to operate with highly diluted reactant mixture, which is suitable to run directly with ...
Tópico(s): Fuel Cells and Related Materials
2013 - ASM International | Journal of Fuel Cell Science and Technology
Kook‐Young Ahn, Han-Seok Kim, Vjacheslav Ivanovich Antonovsky,
Tópico(s): Radiative Heat Transfer Studies
2001 - Korean Society of Mechanical Engineers | KSME International Journal
Ha Rim Kook, Young Ju Lee, Jae Seung Yeon, Han Sol Lee, Choong Hee Noh, Kwang Mo Kim, Ki Beom Kim, Jung Keun Lee, Sangchul Lee, Seong Jin Jeong, Sung Kyu Hong, Seok‐Soo Byun, Eunsik Lee, Sang Eun Lee,
... CISPLATIN RESISTANT BLADDER CANCER CELL LINE Ha Rim Kook, Young Ju Lee, Jae Seung Yeon, Han Sol Lee, Choong Hee Noh, Kwang Mo Kim, ...
Tópico(s): Food Quality and Safety Studies
2014 - Lippincott Williams & Wilkins | The Journal of Urology
Kook‐Young Ahn, Han-Seok Kim, Jin-Hyuk Ahn, Hyoung-Su Pae,
The combustion characteristics have been investigated to develop the 50 kW-class gas turbine combustor. The combustor design program was developed and applied to design this combustor. The combustion air which has the temperature of 45, 200, were supplied to combustor for elucidating the effect of inlet air temperature on CO, NOx emissions and flame temperature. The exit temperature and NO were increased and CO was decreased with increasing inlet air temperature. Also, the effect of equivalence ...
Tópico(s): Advanced Combustion Engine Technologies
2000 - Korean Society of Mechanical Engineers | Transactions of the Korean Society of Mechanical Engineers B
Kook Young Kim, Jisang Han, Seung‐Young Yu, Hyung‐Woo Kwak,
Tópico(s): Retinal and Optic Conditions
2012 - Cadmus Press | Investigative Ophthalmology & Visual Science
Hyung‐Woo Kwak, Kook-Young Kim, Jisang Han, Seung‐Young Yu,
Tópico(s): Retinal Imaging and Analysis
2012 - Cadmus Press | Investigative Ophthalmology & Visual Science
Min-Gyeong Seo, Kook-Young Han, Sang‐Hyun Kim, Changkeun Kang, Jong-Hyun Kim, Il‐Hwa Hong,
Leopard cat (Prionailurus bengalensis euptilurus) is a small wild cat assessed as an endangered wildlife in Korea. There have been very few reports of their diseases. Herein, we describe fibrinous pleuritis caused by Streptococcus canis infection with excessive pleural effusion, hydropericardium, mild ascites, and liver fibrosis in a leopard cat. S. canis is a commensal microflora in domestic cats and often affects the upper respiratory tract inducing chronic and severe respiratory diseases. However, ...
Tópico(s): Rabies epidemiology and control
2023 - Korean Society of Veterinary Science | Journal of Veterinary Science
Seung‐Young Yu, Jisang Han, Kook-Young Kim, Hyung‐Woo Kwak,
Tópico(s): Corneal surgery and disorders
2012 - Cadmus Press | Investigative Ophthalmology & Visual Science
Jin-Do Chung, Ji-Woong Han, Kook‐Young Ahn,
An experimental study on the NOx formation of LNG flame in fuel staged combustor has been studied. The design concept of multi fuel/air staged combustor is creation of two separate flame, a primary flame is a act as a pilot flame for the secondary combustion stage combustion zone, where most of fuel bums. Experiments were performed on a semi-industrial scale (thennal input 0.233 MW) in a laboratory furnace and Liquefied Natural Gas(LNG) was used as a primary and secondary fuels. This study included ...
Tópico(s): Advanced Combustion Engine Technologies
2004 - Korean Society of Mechanical Engineers | Transactions of the Korean Society of Mechanical Engineers B
Jae Hwan Jang, Ju Hyeong Cho, Han Seok Kim, Sang Min Lee, Min Kuk Kim, Kook Young Ahn,
본 연구에서는 가스터빈 연소기에 적용하기 위한 예혼합 스월버너의 배기가스 및 화염안정성 최적화를 위하여 버너의 구조변경에 따른 연소특성을 실험적으로 분석하였다. 버너의 연료분사구조에 따른 배기가스 배출 특성을 파악하고자 단일연료분사구조와 이중연료분사구조를 갖는 예혼합 버너의 연소특성을 비교 분석하였으며 이중연료분사구조 적용 시 연료/공기 혼합특성이 향상되어 CO와 NOx의 배출농도가 감소하는 경향을 나타내었다. 또한, 노즐출구와 라이너의 지름 비(confined ratio)에 따른 연소부하 및 배기가스 특성을 분석한 결과 confined ratio 감소 시 연소부하 감소로 인해 NOx 배출농도가 감소되었으며, 체류시간의 증가로 인해 CO의 산화 반응이 증가하여 CO 배출농도가 감소하였다. 노즐분출속도는 30 ㎧에서 배기가스특성이 우수하며, 속도 증가(40 ㎧) 시 배가스특성이 저하되고 속도 감소(20 ㎧) 시 화염안정성이 저하되었다.
Tópico(s): Combustion and Detonation Processes
2013 - Korean Society of Mechanical Engineers | Transactions of the Korean Society of Mechanical Engineers B
Kyu Seong Jo, Kook Young Kim, Yong Woo Lee, Sang Beom Han, Chul Young Choi,
The purpose of this study was to investigate the efficacy and indications of using dried gamma ray-sterilized amniotic membrane (AM) transplantation with bandage contact lenses for the in-office sutureless treatment of various ocular surface diseases.
Tópico(s): Corneal surgery and disorders
2024 - Lippincott Williams & Wilkins | Cornea
Han-Seok Kim, Kook‐Young Ahn, Ho-Keun Kim, Myung-Jong Yu, Seung-Wook Baek,
Experimental and numerical studies have been done to examine the effects of excess air ratio and tertiary air swirl number on the formation characteristics of NOx in a pilot scale combustor adopting a multi-air staged burner. In numerical calculation the mathematical models for turbulence, radiation and nitric oxide chemistry were taken into account. The radiative transfer equation was solved using the discrete ordinates method with the weighted sum of gray gases model. In the NOx chemistry model, ...
Tópico(s): Advanced Combustion Engine Technologies
2003 - Korean Society of Mechanical Engineers | Transactions of the Korean Society of Mechanical Engineers B
Han-Seok Kim, Ho-Keun Kim, Kook‐Young Ahn, Yongmo Kim,
CO₂ is a well-known green house gas as well as the major source of global wanning. Many researchers have studied to reduce CO₂ emission in combustion processes. Among the method for reducing CO₂ emission, oxygen-enriched combustion has been proposed. Because its adiabatic flame temperature is relatively too high, existing facilities must be changed or the flame temperature in the combustion zone should be reduced. The combustion characteristics, composition in the flame zone, temperature profile ...
Tópico(s): Catalytic Processes in Materials Science
2004 - Korean Society of Mechanical Engineers | Transactions of the Korean Society of Mechanical Engineers B
Han-Seok Kim, Won-Seok Choi, Ju-Hyeong Cho, Kook‐Young Ahn,
The present study has experimentally investigated the effects of CO₂ diluted oxygen on the structure of swirl-stabilized flame in a lab-scale combustor. The methane fuel and oxidant mixture gas (CO₂ and O₂) were mixed in a pre-mixer and introduced to the combustor through different degrees of swirl vanes. The flame characteristics were examined for various amount of carbon dioxide addition to the methane fuel and various swirl strengths. The effects of carbon dioxide addition and swirl intensity ...
Tópico(s): Advanced Combustion Engine Technologies
2009 - Korean Society of Mechanical Engineers | Transactions of the Korean Society of Mechanical Engineers B
초록·키워드 목차 오류제보하기 등록된 정보가 없습니다. 1. 서론2. 연료전지 하이브리드 시스템 기술3. 연료전지 시스템 최적화 기술4. 연료전지 BOP 기술 및 개발전략5. 결론참고문헌
Tópico(s): Advanced battery technologies research
2009 - Korean Society of Marine Engineering | Han-guk marin enjinieoring hakoeji