• 한국유체기계학회 논문집
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• 제12권1호
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• pp.43-50
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• 2009

Waste heat recovery process designs and performance analyses are conducted on the IGCC(Integrated Gasification Combined Cycle) power plants integrated with two different coal gasification and gas cleanup processes by Shell and GE/Texaco. Through the analysis results, the present study provides the steam integration concept between the HRSG and the chemical processes of IGCC power plant, and investigates the effect of steam integration on the power generation of IGCC power plant. The present simulation results show less steam power output and higher overall IGCC efficiency of the Shell-based power plant than the GE/Texaco.

• 대한공업교육학회지
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• 제37권2호
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• pp.57-75
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• 2012

이 연구의 목적은 STEAM 교육에 대한 초등교사의 인식과 요구를 조사 분석하는 것이다. 이 연구를 수행하기 위하여 군집표집 방법으로 전국의 초등교사 533명을 표집하여 연구대상으로 하였고, 우편 및 이메일을 통하여 조사를 실시하였다. 연구결과는 다음과 같다. 첫째, 초등교사는 STEAM 교육의 필요성에 대하여 긍정적으로 공감하고 있었으나 STEAM 교육에 대한 인식은 보통 수준이었다. 둘째, STEAM 교육을 적용한 경험이 있는 초등교사의 비율이 매우 낮았다. STEAM 교육 적용에 대한 어려움은 STEAM 교육 자료 준비의 어려움이 가장 높았으며, STEAM 교육에 대한 이해 부족 개발된 STEAM 교육프로그램의 보급 부족, STEAM 교육 실현을 위한 교수 학습 방법 부족 순으로 나타났다. 셋째, 초등교사는 STEAM 교육의 교육방향에 대하여 현실생활과 밀접한 관련이 있는 교육, 창의적인 사고능력 및 문제해결능력 향상을 위한 교육, STEAM 교과의 흥미 있는 교육, STEAM 교과의 학업능력 향상을 위한 교육 순으로 요구하였다. 넷째, 초등교사는 STEAM 교육에 적합한 통합 방식에 관하여 현실생활과 관련한 활동 중심의 통합, 현실생활과 관련한 주제 중심의 통합, 학생의 필요와 흥미 중심의 통합, 문제 중심의 통합 순으로 요구하였다. 다섯째, 초등교사는 STEAM 교육을 통해 함양해야 할 능력에 관하여 창의적인 설계, 문제해결 능력, 학업수행능력, 대인관계 능력 순으로 요구하였다. 마지막으로 초등교사는 STEAM 교육 활성화를 위해 STEAM 교육프로그램 개발 및 보급, STEAM 교육에 대한 교사의 이해, 다양한 교수 학습자료 보급, 교사 연수, 교사 협동, 교육과정 개선 등이 이루어져야 함을 요구하였다.

• 한국정보기술학회 영문논문지
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• 제10권2호
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• pp.111-123
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• 2020

The core competencies for the 21st century are creativity, critical thinking, collaboration, and communication. In recent classes where ICT (information, communication, and technology) is grafted, a lot of efforts are also being made to increase such competencies. According to a research work, ICT is most often used as a communication channel between teachers and students or as an online collaboration tool among students. However, ICT has only played a role as a guideline for instruction, but not included in the curriculum until now. The research on methods how to integrate technology into teaching and learning is in full swing due to the development of technology and the advent of Covid-19. In this paper, we propose a technology integration hierarchy model, namely K-TIHM that can be combined with STEAM education. Since only learning environments have been proposed in the existing research for technology-based STEAM education, our model proposes a series of technology integration hierarchy that can be applied by school age along with STEAM. Also, we analyze the differences in among the Korea's ICT education operation guidelines, the Korea's Software education guidelines, and ours. The proposed model can help developing the primary and secondary school curriculum integrated with technology.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2010년도 추계학술대회 초록집
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• pp.129.2-129.2
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• 2010

As a part of the government renewable energy policy, KOWEPO is constructing 300MW IGCC plant in Taean. IGCC plant consists of gasification block, air separation unit and power block, which performance test is separately conducted. Overall performance test for IGCC plant is peformed to comply with ASME PTC 46. Major factors affected on the overall efficiency for IGCC plant are external conditions, each block performance(gasification, ASU, power block), water/steam integration and air integration. Performance parameters of IGCC plant are cold gas efficiency, oxygen consumption, sensible heat recovery of syngas cooler for gasification block and purity of oxygen, flow amount of oxygen and nitrogen, power consumption for air separation unit and steam/water integration among the each block. The gas turbine capacity applied to the IGCC plant is 20 percent higher than NGCC gas turbine due to the low caloric heating value of syngas, therefor it is possible to utilize air integration between gas turbine and air separation unit to improve overall efficiency of the IGCC plant and there is a little impact on the ambient condition. It is very important to optimize the air integration design with consideration to the optimized integration ratio and the reliable operation. Optimized steam/water integration between power block and gasification block can improve overall efficiency of IGCC plant where the optimized heat recovery from gasification block should be considered. Finally, It is possibile to achieve the target efficiency above 42 percent(HHV, Net) for 300MW Taean IGCC plant by optimized design and integration.

• 한국과학교육학회지
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• 제35권4호
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• pp.709-723
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• 2015

우리나라는 2011년부터 체계적으로 융합인재교육 연구를 수행하기 시작하여 수많은 프로그램을 개발해오고 있으며, 교육과정에도 구체적으로 반영할 움직임을 보이고 있다. 이에 STEM, STEAM 교육에 관한 수많은 논문들의 리뷰를 통해 이 교육의 특징, 문제점, 해결해야 할 과제를 명료화할 시점이 되었다고 본다. 따라서 본 연구는 STEM과 STEAM 교육과 관련한 많은 국내외 논문들의 리뷰를 통해 이들 교육의 특징 및 문제점을 명료화하고 이를 통해 우리나라 융합인재교육의 해결 과제를 제안하는 데 있다. 본 연구를 통해 얻은 의미 있는 결과는 다음과 같다. 첫째, 다양한 통합교육과정의 접근 방식은 통합의 목적에 따라 구분되는 것이지 우월성의 차이로 구분될 수 없음을 제시하였다. 둘째, STEAM 교육과 같은 통합교육과정은 이전의 교육과정에서 강조된 수직적 깊이보다 교과 융합과 같은 수평적 연계를 중시하는 특징이 있다. 이에 따라 교과 지식과 수직적인 연계성이 약화될 수밖에 없다. 이러한 문제점을 극복하기 위해서는 기존의 교육과정에서 강조되었던 핵심 개념과 기능이 STEAM 교육에서도 강조되어야 하며, 이와 더불어 기존의 각 교과의 핵심 개념과 기능에 대한 비교 연구가 선행되어야 함을 제시하였다. 셋째, 우리나라 융합인재교육의 연구 현황을 제시하고, 그 한계와 극복해야 할 사항을 제시하였다. 넷째, 이러한 리뷰 연구 결과를 토대로 현 상황에서 적용 가능한 STEAM 교육의 접근 방안의 예를 제안하고, 교육과정, 교수학습, 평가 측면에서 우리나라 융합인재교육에서 해결해야 할 과제와 시사점을 제안하였다.

• 한국초등과학교육학회지:초등과학교육
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• 제32권3호
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• pp.361-377
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• 2013

The purposes of this study were to develop STEAM teaching materials about 'world of small organisms' unit on elementary science education and to apply lesson using them for the 5th and 6th graders. Compared to other STEAM programs studied previously, the STEAM teaching materials of this study includes students' STEAM, teachers' guide, story-telling books and multimedia teaching aids consisted of practical resources to manage STEAM lessons. The whole program was designed from multidisciplinary integration to extradisciplinary integration through activities making creative products, meanwhile each period had discretionary S, T, E, A, M factors specifically. To examine the effects of integrated lesson on scientific knowledge, process skills, and affective domain, the study subjects were divided into two groups. The experimental group was composed of 69 individuals participated in STEAM lesson, while students of the control group were 67 individuals learned through general learning methods. The developed STEAM teaching materials affected significantly on scientific knowledge and affective domain of elementary school students, but process skills were not increased significantly. In the present study, therefore, the approach applying STEAM education could be suggested as alternative learning materials or supplementary teaching materials at the field of small organisms in elementary science sufficiently.

• Nuclear Engineering and Technology
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• 제53권8호
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• pp.2427-2444
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• 2021

The lack of plant-side energy storage analysis to support nuclear power plants (NPP), has setup this research endeavor to understand the characteristics and role of specific storage technologies and the integration to an NPP. The paper provides a qualitative review of a wide range of configurations for integrating the energy storage system (ESS) to an operating NPP with pressurized water reactor (PWR). The role of ESS technologies most suitable for large-scale storage are evaluated, including thermal energy storage, compressed gas energy storage, and liquid air energy storage. The methods of integration to the NPP steam cycle are introduced and categorized as electrical, mechanical, and thermal, with a review on developments in the integration of ESS with an operating PWR. By adopting simplified off-design modeling for the steam turbines and heat exchangers, the results show the performance of the PWR steam cycle changes with respect to steam bypass rate for thermal and mechanical storage integration options. Analysis of the integrated system characteristics of proposed concepts for three different ESS suggests that certain storage technologies could support steady operation of an NPP. After having reviewed what have been accomplished through the years, the research team presents a list of possible future works.

• International Journal of Advanced Culture Technology
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• 제8권2호
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• pp.260-269
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• 2020

The Steam Assisted Gravity Drainage (SAGD) process is an enhanced method to extract oil from bitumen which involves surface and central process facilities. This paper describes the Central Process Facilities (CPF) of SAGD and proposes several retrofit plans to the Heat Exchanger Network (HEN). In this approach, the process integration scheme is applied to estimate the energy saving in HENs, and various cases are modeled in favor of a commercial simulator. Throughout this work, a minimum approach temperature of 10℃ is assumed. The results reveal that, due to the HEN optimization using process integration, the heating and cooling duties can be reduced to 29.68MW and 1.886MW, respectively. Compared with the Husky case, all cases considered in this study indicate a potential reduction of at least 6% in total cost, including investment and operation costs.

• International Journal of Advanced Culture Technology
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• 제9권3호
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• pp.55-61
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• 2021

In this study, a learning environment based on STEAM theory was proposed to support and improve learners' activities and achievements for convergent design education. The learning environment design influence STEAM education with intentional design and schedule coordination, schools can create informal environments that are crucial to STEAM education. The physical surroundings of the learning space should be applied to teaching methods and learning activity, especially for STEAM-based education, physical space conditions should support the learner's design thinking and process. Furthermore, STEAM-based education environment should support a vast array of experiences that allow students to learn the context around ideas and skills. For spaces for learning environment based on STEAM, common design principles should be considered such as technology integration, safety and security, transparency, multipurpose space, and outdoor learning. Therefore, the learning environment based on STEAM needs flexible and mobile, connected, integrated, organized, flipped, and team-focused surroundings to support the learners understand, participate, cooperate, and accomplish the design process.

• 한국수학사학회지
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• 제29권1호
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• pp.45-69
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• 2016

In this study, we investigate integrated educations as an alternative educational method. I look around the developments of the integrated educations from MST education through STEAM education, especially in mathematics education. I analyzed integrated educations such as MST, STS, STEM, STEAM educations and compare them to each other, in mathematics education. And I discuss how to apply STEAM education to Korean mathematics education. I suggest a proper integrated education, in particular, STEAM education, as one that is suitable for Korean mathematics education.