저온 태양열을 이용한 생물학적 오수 처리 장치 실증 실험

정모(Chung Mo),이동원(Lee Dong-Won) 한국태양에너지학회 2008 한국태양에너지학회 논문집 Vol.28 No.2

A low-temperature solar thermal system assisting a biological nitrogen treatment reservoir was designed and field-tested. A large tank whose temperature was maintained at about 25-30 ℃ to enhance the performance of a biological nitrogen treatment process was heated by an array of flat plate solar collectors. Test results revealed that the overall collector efficiency was above 50% for the most cases tested. This high efficiency was possible owing to the relatively low collector temperature that can be traced back to the reservoir temperature. A substantial enhancement In nitrogen treatment was observed as a result of maintaining the reservoir temperature higher.

자연대류식 태양열 곡물 건조기의 유동 및 열전달 특성

정모(Mo Chung),배철호(Cheolho Bai) 한국태양에너지학회 1994 한국태양에너지학회 논문집 Vol.14 No.1

굴뚝 효과를 이용한 자연 대류식 태양열 곡물 건조기에 대하여 주어진 운전조건 하에서의 굴뚝 출구의 공기 온도와 공기 유량을 이론적 해석에 의하여 구하고 실험을 통하여 타당성을 점검하였다. 건조기와 굴뚝을 합쳐 일차원으로 단순화하고 질량 보존, 에너지 보존, 단순화된 Bernoulli형 운동 방정식을 적용하여 자연 대류에 의한 유동 해석을 한 결과 무차원 공기 유량과 무차원 출구 온도를 하나의 무차원 독립 변수의 함수로 표시할 수 있었다. 이 무차원 독립 변수는 굴뚝과 집열기의 운동학상 중요한 제원과 외기온, 일사량, 집열기 효율 및 건조기 내부에서의 증발량 등을 복합적으로 포함한다. 이론적 관계식을 실물 집열기의 실험을 통하여 검증한 결과 대체적으로 잘 일치함을 알 수 있었고 집열 효율과 건조 속도에 대한 추가 정보를 이론식에 대입하면 건조 과정에 대한 열 성능 분석은 물론 굴뚝 출구의 온도를 건조 대상 곡물의 요구 건조 온도에 따라 원하는 대로 제어하는데 본 연구의 이론식을 이용할 수 있을 것이다. The thermal performance of a natural draught solar dryer has been theoretically analyzed to predict the outlet temperature and the mass flow rate of the circulating air. Simplified one dimensional forms of the energy equation and the momentum equation have been solved and results are presented in terms of a dimensionless parameter. The dimensionless parameter contains such parameters as chimney and dryer configuations, ambient temperature, insolation, mass transfer rate (drying rate), and dryer thermal efficiency. The validity of the solution has been checked against experimental measurement for a full size model for a wide range of operating conditions. Reasonable agreement between theoretical prediction and experimental measurement has been observed. The theoretical result of this study can be applied to the control of dryer temperature for various crops.

건물 단지에 대한 에너지 수요 예측 데이터베이스 응용 프로그램 개발

정모(Chung Mo),박화춘(Park Hwa-Choon) 한국태양에너지학회 2009 한국태양에너지학회 논문집 Vol.29 No.3

The field-surveyed and measured energy consumption data is processed to develop building energy demand models for heating, hot water, cooling, and electricity. The load models are systematically organized as a database and hourly loads for a span of year (8760 hours) are generated by the program. Based on those models a Microsoft Access application program is developed to calculate energy demands for a Community Energy System (CES) composed of 17 types of buildings. User-friendly interlaces are provided to assist non-expert end users and necessary tools to link the calculation results to subsequent coagulations such as operation simulation or economic assessment.

건물 단지에 대한 에너지 수요 예측 프로그램 개발

정모(Chung Mo),박화춘(Hwa Choon Park),임용훈(Yong-Hoon Im) 한국태양에너지학회 2009 한국태양에너지학회 학술대회논문집 Vol.- No.-

A Microsoft Access application program is developed to calculate energy demands for a Community Energy System (CES) composed of various types of buildings. The field-measured heating, hot water, cooling, and electricity energy consumptions for 14 types of building are systematically organized in forms of database and hourly loads for a span of year (8760 hours) are generated through an automated statistical procedure. User-friendly standard windows interfaces are provided to assist non-expert end users.

태양열을 이용한 생물학적 질소 처리 장치에 대한 현장 실험 연구

정모(Chung Mo),변무룡(Byun Moo-Ryong),이동원(Lee Dong-Won),윤응상(Yoon Eung-Sang),김정배(Kim Jeong Bae) 한국태양에너지학회 2006 한국태양에너지학회 학술대회논문집 Vol.- No.-

A low-temperature solar thermal system assisting a biological nitrogen treatment reservoir was designed and field-tested. A large tank whose temperature was maintained at about 25-30 ℃ to enhance the performance of a biological nitrogen treatment process was heated by an array of flat plate solar collectors. Test results revealed that the overall collector efficiency was above 50% for the most cases tested. This high efficiency was possible owing to the relatively low collector temperature that can be traced back to the reservoir temperature. A substantial enhancement in nitrogen treatment was observed as a result of maintaining the reservoir temperature higher.

통계적 방법에 의한 건물 부하 산정

정모(Chung Mo),박화춘(Park Hwa-Chun),임용훈(Im Yong-Hoon) 한국태양에너지학회 2008 한국태양에너지학회 학술대회논문집 Vol.- No.-

A Microsoft Access® application that estimates hourly building energy load is developed based on statistical. field measurements. Hourly patterns of heating, hot water, cooling, and electricity loads are evaluated for an energy consuming community composed of various types of buildings. Popular building types such as apartments, offices, hotels and accomodations, stores, churches, schools and educational institutes are included in the model. For each type of buildings, hourly patterns for a month are measured and compiled to derive a 24-hour load distributions. Daily sum of heating, hot water, cooling, and electricity loads are also measured for the building types. The annual energy need profiles are generated by combining the 24-hour distribution and 365-day consumption patterns. The annual maximum values of the 8760 hours of a year for each load type serves as a guide for selecting a device capacity. A user-friendly interface that ushers users throughout the whole process is provided.

열-전기 병합 에너지 생산 겸 자체 냉각 온실

정모(Chung, Mo),김종성(Kim, Jong-Sung) 한국신재생에너지학회 2006 한국신재생에너지학회 학술대회논문집 Vol.2006 No.06

An energy generating greenhouse based on fluoropolymer envelope and fresnel lens is proposed. The outstanding properties of the fluoropolymer films make them very suitable for large scale solar applications. Extremely high optical transmission over the whole solar spectrum, combined with mechanical strength, and durability allows us to design a highly optimized greenhouses for both plant growing and energy generation. Systems such as photovoltaic triple junction cells are especially attractive since they have up to 35% efficiency with much less cell material when the sun beam is focused with concentrators such as fresnel lenses. Cooling such devices will enhance the efficiency and provide useful thermal energy that could be further utilized for various applications depending on the local demands. This article introduces the basic ideas and principles of the energy generating greenhouses as a first step towards the actual deployment of such systems under Korean environment.

저온 태양열 이용 생물학적 오수 처리

정모(Chung, Mo),이동원(Lee, Dong-Won),김정배(Kim, Jeong-Bae),윤응상(Yoon, Eung-Sang),변무룡(Byun, Moo-Ryong),변무원(Byun, Moon-Won) 한국신재생에너지학회 2006 한국신재생에너지학회 학술대회논문집 Vol.2006 No.06

A low-temperature solar thermal system assisting a biological nitrogen treatment reservoir was designed and field-tested. A large tank whose temperature was maintained at about 25{sim}30?C to enhance the performance of a biological nitrogen treatment process was heated by an array of flat plate solar collectors. Test results revealed that the overall collector efficiency was above 50% for the most cases tested. This high efficiency was possible owing to the relatively low collector temperature that can be traced back to the reservoir temperature. A substantial enhancement in nitrogen treatment was observed as a result of maintaining the reservoir temperature higher.

다공질 물질 속에서의 열 및 물질 전달에 관한 연구

정모(Mo Chung) 한국태양에너지학회 1995 한국태양에너지학회 논문집 Vol.15 No.1

다공질 물질 속에서 일어나는 저속 유동(Darcy Flow)에 동반한 열 및 물질 전달 문제를 해석하기 위한 새로운 수치 해석 기법이 소개되고 간단한 예제를 통하여 그 성능을 평가하였다. 본 연구의 수치 해석법은 다공질 물질 속에서 일어나는 모든 전달 현상에서 중요한 확산효과(Cispersion Effect)를 쉽게 처리할 수 있으며 특히 미정 경계선 문제(Moving Boundary Problem) 해석에도 효과저그로 적용될 수 있어 응용 범위가 넓을 것으로 기대된다. A numerical scheme based on a coordinate transform into stream function-velocity potential is proposed to solve heat and momentum transfer in porous media with phase change. A significant simplification of both computational domain and governing equations can be achieved by the transform. The dispersion term in the flow through porous media, which is important at the phase change interface, can be successfully incorporated into the numerical scheme without introducing any further computational complications.

학부모의 유아태권도수업 인식이 만족도에 미치는 영향

김정모(Kim, Jung-Mo),이충영(Lee, Chung-Young) 한국체육과학회 2011 한국체육과학회지 Vol.20 No.6

The study has purpose to provide fundamental data helping guidance of children Taekwondo class by defining effect on the satisfaction degree by parents’ cognition on the children Taekwondo class. For this, it suggests developmental direction by analyzing cognition and satisfaction on the children Taekwondo targeting parents who give the most educational influence to children. The specific research tasks are like below. First, children’s Taekwondo cognition has difference by parents’ characteristics. Second, children’ Taekwondo satisfactions have difference by parents’ characteristics. Third, parents’ cognition on children’ Taekwondo class will give influence to satisfaction. For this study, valid questionnaires of 365 copies were used for survey method targeting parents of kindergarten students in the capital, Seoul, and its surrounding areas. Satisfaction degree of children Taekwondo among research questionnaire performed factor analysis and 4 factors of the educational effect, facility, instructor, and program were projecting out over .5. Credibility of questionnaire composition appeared relatively high as .845~.917 of Cronhach’s a. Data process performed one-way ANOVA and post-mortem used Duncan method. Plus, to analyze the effect of parents’ cognition about children Taekwondo on the satisfaction degree, multiple regression analysis was performed after correlation relative analysis. Study result showed meaningful difference at the difference of cognition, age, educational background, and monthly income by parents’ characteristics. Satisfaction on the children Taewondo class by parents’ characteristics showed meaningful difference only in the age and educational background and didn’t show meaningful difference at monthly income. Effect analysis result on the satisfaction degree of parents’ children Taekwondo class showed meaningful positive (+) effect relation at the educational effect and instructors’ satisfaction.