개방형 쇼케이스 성능 향상을 위한 수치해석 연구

조민정(Min Jeong Jo),김건우(Gun Woo Kim),오명도(Myung Do Oh) 대한설비공학회 2019 대한설비공학회 학술발표대회논문집 Vol.2019 No.-

개방형 쇼케이스 성능 향상을 위한 토출구의 유동분포 및 소비전력을 파악하기 위한 수치해석 연구를 진행하였다. 기존 개방형 쇼케이스의 경우 토출구의 냉기로 인한 휨 현상이 발생하여 소비전력에 따른 성능저하의 문제가 발생한다. 이 문제를 해결하기 위하여 개방형 쇼케이스 토출구에 반경에 따른 성능향상에 대한 연구를 진행하였으며, CFD(Computational Fluid Dynamics) 해석결과 기존 성능에 비해 소비전력이 약 10% 정도 감소한 것을 확인하였다.

動機づけおよび満足度向上を目的とした会話テスト 「ショーケース」の開発·実践 - 短期大学の韓国人日本語学習者を対象として -

이부키 사야카 한국일본어학회 2016 日本語學硏究 Vol.0 No.47

최근 전문 대학에서는 학습에 대한 무력감을 가진 학습자가 많고 그런 학습자들은 학교 생활이나 취업 활동에도 지장을 초래하고 있다. 본교도 예외는 아니다. 본 연구에서는 그 해결 방법을 찾기 위해 일본어 학습에 관한 면담을 학습자 개개인에게 행한 결과 “어떤 선생님의 평가는 엄격하기 때문에 열심히 해도 좋은 점수를 받을 수 없다”,“우리 반은 전체적으로 수준이 높아서 노력해도 좋은 성적이 안 나온다”등의 문제점이나 불만이 있는 것으로 밝혀졌다. 본 연구에서는 평가의 불만을 해소하고 학습자의 만족도를 향상시키는 것을 목적으로 한 회화 시험인 “쇼케이스”를 개발, 실시했다. 설문조사와 구두 인터뷰 결과에 의하면 약 60%의 학습자가 쇼케이스에 어느 정도의 효과가 있었다고 느끼고 있으며, 쇼케이스 도입에 약 80%의학습자가 찬성을 하고 있는 것으로 밝혀졌다. 특히 쇼케이스는 학습자 자신이 미리 녹화한 비디오를 보여주으로써 ①최선의 실력을 보여줄수 있다, ②다른 사람에게 자신의 실력을 보여줄 수 있는 기회가 있다 ③자신을 되돌아 볼 수 있다, ④학습 내용을 복습할 수 있다, ⑤평가가형평성이 있다, ⑥재미있다·즐겁다라는 특성이 학생의 만족도향상 및 동기부여와 관련되어 있는 것 같다. It is believed that a lack of enthusiasm for studying and learning at junior college in Korea has recently been rather common. This, in turn, negatively affects both the students’ lifestyle and their activities regarding gaining employment later on, and our school is no exception. In order for us to find a method to solve the problem, we conducted oral interviews with students of the Japanese language on a one-to-one basis. We have discovered that evaluations done by some teachers are too strict which makes it difficult for students to gain good marks regardless of how much a student tries, and which in turn leads to problems and dissatisfaction among students. In addition, the level of some classes is considered too high overall which makes it difficult for students to gain good marks regardless of the efforts made by the students, which also leads to problems and dissatisfaction. In line with the above, we in this study developed and conducted a conversation test called “Showcase” with the purpose of eliminating dissatisfaction caused from the above mentioned evaluations. The test led to an increase in the level of satisfaction. The result of written surveys and of oral interviews showed that about 60 percent of students somehow feel that “Showcase” is effective. It was also revealed that about 80 percent of students achieved better results. Furthermore, it is possible to utilize “Showcase” on various occasions, show it to other students, look back at oneself, and review the contents of one studies. Thus the conversation test “Showcase” contributes to fairer evaluations, and makes it more fun and more enjoyable for students, leading to more satisfaction and motivation among them.

動機づけおよび満足度向上を目的とした会話テスト 「ショーケース」の開発 · 実践

伊吹早耶香(이부키 사야카),栗飯原美智(아이하라 미치) 한국일본어학회 2016 日本語學硏究 Vol.0 No.47

최근 전문 대학에서는 학습에 대한 무력감을 가진 학습자가 많고 그런 학습자들은 학교 생활이나 취업 활동에도 지장을 초래하고 있다. 본교도 예외는 아니다. 본 연구에서는 그 해결 방법을 찾기 위해 일본어 학습에 관한 면담을 학습자 개개인에게 행한 결과 “어떤 선생님의 평가는 엄격하기 때문에 열심히 해도 좋은 점수를 받을 수 없다”,“우리 반은 전체적으로 수준이 높아서 노력해도 좋은 성적이 안 나온다”등의 문제점이나 불만이 있는 것으로 밝혀졌다. 본 연구에서는 평가의 불만을 해소하고 학습자의 만족도를 향상시키는 것을 목적으로 한 회화 시험인 “쇼케이스”를 개발, 실시했다. 설문조사와 구두 인터뷰 결과에 의하면 약 60%의 학습자가 쇼케이스에 어느 정도의 효과가 있었다고 느끼고 있으며, 쇼케이스 도입에 약 80%의 학습자가 찬성을 하고 있는 것으로 밝혀졌다. 특히 쇼케이스는 학습자 자신이 미리 녹화한 비디오를 보여주으로써 ①최선의 실력을 보여줄 수 있다, ②다른 사람에게 자신의 실력을 보여줄 수 있는 기회가 있다 ③자신을 되돌아 볼 수 있다, ④학습 내용을 복습할 수 있다, ⑤평가가 형평성이 있다, ⑥재미있다 · 즐겁다라는 특성이 학생의 만족도향상 및 동기부여와 관련되어 있는 것 같다. It is believed that a lack of enthusiasm for studying and learning at junior college in Korea has recently been rather common. This, in turn, negatively affects both the students’ lifestyle and their activities regarding gaining employment later on, and our school is no exception. In order for us to find a method to solve the problem, we conducted oral interviews with students of the Japanese language on a one-to-one basis. We have discovered that evaluations done by some teachers are too strict which makes it difficult for students to gain good marks regardless of how much a student tries, and which in turn leads to problems and dissatisfaction among students. In addition, the level of some classes is considered too high overall which makes it difficult for students to gain good marks regardless of the efforts made by the students, which also leads to problems and dissatisfaction. In line with the above, we in this study developed and conducted a conversation test called “Showcase” with the purpose of eliminating dissatisfaction caused from the above mentioned evaluations. The test led to an increase in the level of satisfaction. The result of written surveys and of oral interviews showed that about 60 percent of students somehow feel that “Showcase” is effective. It was also revealed that about 80 percent of students achieved better results. Furthermore, it is possible to utilize “Showcase” on various occasions, show it to other students, look back at oneself, and review the contents of one studies. Thus the conversation test “Showcase” contributes to fairer evaluations, and makes it more fun and more enjoyable for students, leading to more satisfaction and motivation among them.

소형 쇼케이스용 증기압축사이클에서의 액인젝션을 이용한 포화압축 사이클 가능성 검토

최정(Jeong Choe),정종민(Jongmin Jung),전용석(Yongseok Jeon) 대한설비공학회 2021 설비공학 논문집 Vol.33 No.4

The objective of this study is to decrease the refrigerant temperature at the compressor outlet under high thermal load conditions with low-GWP refrigerants in the showcase vapor compression cycle. When the outside temperature increases, the showcase cycle suffers a reliability problem due to the high discharge temperature. Liquid injection is a good method for decreasing the discharge temperature of the refrigeration cycle. This study presents the development of a simplified simulation model for predicting the performance of a liquid injection showcase cycle. The optimum injection pressures of the showcase cycle with R410A and R32 were presented. In addition, after the quasi-saturation compression cycle was reached through the multi-stage liquid injection control, the effect of reducing the discharge temperature was analyzed. Finally, the optimal number of injections for each of the refrigerant and operating conditions was presented.

Round flow control을 통한 개방형 쇼케이스에 관한 수치해석 연구

공명근(Myung Keun Gong),김건우(Gun Woo Kim),오명도(Myung Do Oh) 대한설비공학회 2018 대한설비공학회 학술발표대회논문집 Vol.2018 No.6

Numerical method was used to assess the energy consumption of vertical open showcase with flow control. Two studies were conducted by applying radius to vertical open showcase. The working fluid was air (Pr = 0.7) and the Reynolds number was 6000 ≤ Reω ≤ 8000. The energy consumption were used to evaluate the improvement of vertical open showcase. As a result it was confirmed that the energy consumption decreased by 10% at radius 40mm. Also, the radius 50mm decreased by 11% more than the Basic open showcase.

쇼케이스용 액체식 직접 접촉 냉각 모듈의 성능시험

강상우(Sarng Woo Karng),정영준(Young Jun Jeong),김서영(Seo Young Kim) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6

The evaporators (EVA) in showcases should be defrosted. The showcases consume additional electric power due to temperature rise inside the showcases during defrosting EVA. Therefore it demands to develop the frostless direct contact liquid cooling module substituting for EVA. In the study, four nozzle plates, 5×16 nozzles of 1.5 ㎜ I.D. and 4×15 nozzles of 2 ㎜ I.D. with the same heat transfer area were manufactured as the aligned and staggered array, respectively. Performance of the nozzle plates was investigated on various inlet air mass flow rates at 24℃ with the same mass flow rate of an antifreezing solution at -10℃ in an air flow channel. As the results, while, performance of the plate for 4×15 nozzles of 2.0 ㎜ I.D. with staggered array was worst, those of the others were similar. The effect on the aligned array for only 2.0 ㎜ I.D. was better than that on the staggered array. Furthermore heat transfer coefficients increased for all plates on increasing air mass flow rates.

쇼케이스의 실제 운전상태를 고려한 축냉시스템 적용 가능성 평가 기초 연구

이동원,김정배 한국태양에너지학회 2012 한국태양에너지학회 논문집 Vol.32 No.5

Experimental study was performed to understand the real operation conditions of a showcase working usually in a convenient store and discount store. The purpose of this study was to show the possibility for practical use of cold-heat storage systems being operated for the showcase. To do that, evaporator and condenser temperatures were measured and the compressor electric power consumption were measured simultaneously. To use the ice storage system, the ice making process was typically operated during midnight being not needed the cooling of the showcase through the continuous running of the condenser unit. And then, the refrigerant was subcooled using the stored cold-heat after being discharged from the condenser during daytime. So, the cooling performance was increased with the sub-cooling of refrigerant during daytime, hence the actual running time of the compressor could be effectively decreased. Through the experiments, this study showed that the compressor electric power consumption during daytime could be transferred to nighttime for applying the refrigerant sub-cooling. So, for the convenient store, the maximum load transfer rates for each working cooler and showcase were estimated about 31.1% and 19.9% respectively. And for the discount store, the maximum load transfer rates for each refrigeration and freezing showcase were estimated about 34.1% and 49.0% respectively.

과냉각 축냉시스템을 적용한 쇼케이스의 운전 특성에 대한 실험적 연구

이동원(Lee, Dong-Won),김정배(Kim, Jeongbae) 한국태양에너지학회 2012 한국태양에너지학회 논문집 Vol.32 No.6

The purpose of this study was to show how to maintain high efficiency and to use reason ably when being applied the cold-heat storage system stotheshow case. An experimental study was performed to manufacture the showcase system in a laboratory. Comparing the result at general operation condition with that of the new condition using ice storage system, this study showed the effects of the refrigerant sub-cooling, and with using inverter. Using ice storage system, the ice making process was operated during midnight being not needed the cooling of the showcase through the continuous running of the condenserunit. And then, the refrigerant was sub-cooledusing the stored cold-heat after being discharged from the air cooling condenser duringthe day time.Through the experiments, the load transfer rate for the showcase using inverter and ices torage was estimated about 30.0%. And showed that the total power consumption of the show case with inverter could be reduced about 37% than that of the show case without inverter.

패션 아틀라스 : 글로벌, 로컬, 그 사이

이재윤(Jae-Yoon Yi) 아시아민족조형학회 2013 아시아민족조형학보 Vol.12 No.-

Fashion visually identifies one’s culture. Through this case study of the inaugural event of the London International Fashion Showcase 2012, this paper explores each nation’s definition of fashion, cultural identity, and location in the international fashion market. The showcase exhibited a wide spectrum of cultural identities. The fashion of some Asian and African nations appeared largely based on local color, while that of China and Australia appeared to be attempting to overcome what is seen as the stigma of local parochialism. Likewise, the fashion of some European nations appeared to reflect a consumerist culture, while that of Korea, Japan, and Estonia appeared to be experimenting with new and imaginative ideas. Meanwhile, in Belgium, Italy, and the United States, fashion appears to reflect an industrial system where contemporary aesthetics is methodically transformed into fashion products. Finally, in the Netherlands, fashion appears to be a form of contemporary culture constantly interacting with modern life. Here, locality is the ability to communicate a contemporary agenda in fashion as well as art. In fashion, as in language, the local and the global are not matters of conflict or dominance. Rather, fashion, as suggested by the London International Fashion Showcase, is a language that enables us to communicate with and negotiate the realms of contemporary life.

국산 제과기계 어디까지 왔나

대한제과협회,Korean Bakers Association 대한제과협회 2000 베이커리 Vol.3 No.-