주거건축에 있어 생태기후 Design 기법

양윤섭,Yang, Yoon-Sub 대한설비공학회 1986 설비저널 Vol.15 No.4

그린하우스의 에너지 모델링

양윤섭(Yang Yoon-Sub),백남춘(Baek Nam Choon),송인춘(Song In-Choon),손창욱(Sohn Chang-Wook) 한국태양에너지학회 1996 한국태양에너지학회 논문집 Vol.16 No.3

이 연구는 시설온실의 지열수를 이용한 에너지시스템을 적용하기 위한 것으로 시뮬레이션하였다. 따라서 온실 시스템 설계에 관한 에너지 모델링의 결과는 시험용 온실의 피크부하가 주택이나 일반건물에 비해 2~3배 크기때문에 하절기와 동절기의 최적 실내 기후조절에는 과다한 에너지소모와 시스템의 경제성 문제가 예상된다. 따라서 최적 기후조절 시스템보다는 혹한과 혹서시에 일부 부하를 감당할 수 있는 시스템 설계가 바람직한 것으로 판단된다.<br/> 본 연구에서는 지하수를 열원으로 하는 경우의 시뮬레이션을 수행하였다. 작동조건은 실내온도를 20℃로 일정하게 유지시킬 때와 주간 25℃ 야간 15℃로 유지시키는 조건하에서 일사량이 있을 경우(1월 대전지방 시간별 평균치)와 전혀 없는 경우로 계산하였다.<br/> 온실의 규모(약 50평)가 적기때문에 온실의 체적당 열손실계수인 G값이 크게 나타났으며 최악의 조건인 일사량이 없는 조건하에서도 20㎾ 용량의 히트펌프로 100% 부하를 감당할 수 있고 히트펌프의 COP는 외기를 열원으로 하는 경우보다 2~3정도 높은 것으로 나타났기때문에 많은 양의 에너지가 절감될 수 있음을 알 수 있었다. The purpose of this study is the application of geothermal energy in a glasshouse employing heat pump system and it’s mathematical simulation. According to modelling of greenhouse energy system, conceptually the peak load of it is two to three times higher than ordinary houses of office buildings. The peak load, causing excessive energy expenses, results an unsatisfactory economic performance of the system. Thus an optinal design to meet a partial thermal load under most critical conditions is preferred to the full thermal load.<br/> A simulation has been performed employing the ground water as the heat source. The simulation were done in the cases of 1) an uniform room temperature of 20 deg C, and 2) 25 deg. C and 3) daytime and 15 deg, C at nigh. Both cases were calculated either with solar irradiation(based on hourly value of irradiation in January in Taejon are) and without it.<br/> Due to the samll size of the glasshouse (about 50 pyung, the volumetric heat loss coefficient (G) turned out to be high. However, even at the worst condition of the “without irradiation”. a 20 ㎾ heat pump enables to meet the 100 percent of the heating load. The energy saving potential of the heat pump on the ground water as heat source was judged being significant showing 2-3 times higher COP than that employing ambient air. The next study will be mainly focused in experimental investigations of heating and cooling of the greenhouse constructed in the first year with a complex energy system, including the effects of the ground and room temperature.

태양열 이용기술 개발 현황

강용혁(Yong Heack Kang),양윤섭(Yoon Sub Yang) 한국태양에너지학회 1998 한국태양에너지학회 논문집 Vol.18 No.2

국내 태양열 이용기술 개발 현황을 분석하기 위해 기술의 중요성과 태양열의 특징을 소개한 후에 국내의 기술동향을 요소기술인 태양열집열기의 온수기, 산업용 중고온시스템 및 태양에너지건물이용기술순으로 분석하였다. 분석결과 우리나라의 기술수준은 저온이용분야인 온수급탕으 경우 실용화 수준이며, 산업용인 중고온분야는 기초 및 소비시장 확대에 의한 가격의 저렴화 및 정부의 지원정책으로 태양열에너지의 이용을 증대시킬 수 있을 것이다.<br/> 이어서 국내 일사량자원과 보급현황을 살펴본 후 대체에너지 기술개발 기본계획상의 중장기 목표와 각분야별 기술의 개요 및 특징을 소개하였다.<br/> 국제환경에 대응하면서 국내 태양열 이용 및 보급 확대를 위해서는 기술개발을 통하여 얻어진 결과들이 사장되지 않도록 경쟁성 확보 시점까지 지속적인 수요창출을 위한 경제성 확보를 위해 추가적인 보완연구, 실용화연구 및 실증시범연구 등이 필요하다. In order to analyze the status of development of solar thermal technology in Korea, importance and characteristics of solar thermal technology is considered. That is, solar collector, solar hot water heater, solar industrial system and solar buildings is analyzed in the view of worldwide technology, And then, domestic insolation sources and sale amounts of solar system is introduced.<br/> In this paper, it is presented long-term objective in the basic plan of development new & rewable energy in Korea.<br/> As a result of analysis, the status of solar thermal technology in Korea is pactical use state in the field of low temperature use and application state in the field of mid-temperature use.

비추적집광형 집열기의 열손실 최적화에 관한 설계연구

조일식(Cho Yil-sik),L. Bulat,황우성(Whang Uoo-Sung),양윤섭(Yang Yoon-Sub) 한국태양에너지학회 2010 한국태양에너지학회 학술대회논문집 Vol.2010 No.4

In Compound Parabolic Concentration(CPC) solar collectors heat transfer as convective and radiative heat losses are comparable. Radiative losses can be reduced by selective absorber coatings, but this will not improve the performance greatly unless convection losses are reduced at the same time. The proposed optical design would provide high efficiency comparable to a vacuum collector, since the design is constructed to suppress convection losses by placing the absorber facing downward, instead of facing up to the sky. The optical design of CPC is modified to provide a relatively uniform distribution of the concentrated radiation flux through the optics on the absorber surface that will enhance the thermal efficiency. Various absorber designs are suggested for efficient applications that lead to a selection of appropriate operating temperature ranges.

열손실 최소화 집속형 집열기 설계

황우성(Whang Uoo Sung),조일식(Cho Yil Sik),양윤섭(Yang Yoon Sub) 한국태양에너지학회 2006 한국태양에너지학회 학술대회논문집 Vol.- No.-

In CPC solar collectors convective and radiative heat losses are comparable. Radiative losses can be reduced by selective absorber coatings, but this will not improve the performance greatly unless convection losses are reduced at the same time. The proposed optical design would provide high efficiency comparable to a vacuum collector, since the design is constructed to suppress convection losses by placing the absorber facing downward, instead of facing up to the sky. The optical design of CPC is modified to provide a relatively uniform distribution of the concentrated radiation flux through the optics on the absorber surface that will enhance the thermal efficiency. Various absorber designs are suggested for efficient applications that lead to a selection of appropriate operating temperature ranges.

상변화물질(PCM)을 이용한 열교환기용 동파방지밸브에 관한 실험적 연구

윤재호(Yun, Jea-ho),김종하(Kim, Joung-ha),정순영(Jeong, Soon-young),양윤섭(Yang, Yoon-sub),김성현(Kim, Seong-Hyun),송덕용(Song, Duk-yong) 한국태양에너지학회 2012 한국태양에너지학회 논문집 Vol.32 No.6

This paper is an experimental study on the freezing protection valve used for solar water heating, air-conditioning systems, and plumbing systems. When the phase change occurs from liquidto solid, most of the substances except water volumetrically shrink. And referred to as PCM(Phase Change Material)a substance with such properties, the phase change temperature varies depending on the material. To prevent the freezing of the plumbing system, such as air-conditioning system in the winter season, we developed a several types of freezing protection valve using PCM whose freezing temperature are 2-4℃. The working principle of the freezing protection valve is that the fluid inside the pipe is released to prevent the system-collapse when fluid temperature reaches the freezing temperature of the PCM. And then the valve is closed and returned to the original position automatically when the temperature of the operating fluidrises. In this paper, the operating temperatures, discharge flow rate and the response characteristics of the valve during the operation are tested and investigated. From the results of this research the freezing protection valves employing PCM are expected to be commercialized in the near future.

상변화물질(PCM)을 이용한 공기조화 시스템용 동파방지밸브에 관한 실험적 연구

정순영(Jeong, Soon-young),윤재호(Yun, Jea-ho),김종하(Kim, Joung-ha),양윤섭(Yang, Yoon-sub),김성현(Kim, Seong-Hyun),송덕용(Song, Duk-yong) 한국태양에너지학회 2012 한국태양에너지학회 학술대회논문집 Vol.2012 No.11

This paper is an experimental study on the freezing protection valve used for solar water heating, air-conditioning systems, and plumbing systems. When the phase change occurs from liquid to solid, most of the substances except water volumetrically shrink. And referred to as PCM(Phase Change Material) a substance with such properties, the phase change temperature varies depending on the material. To prevent the freezing of the plumbing system, such as air-conditioning system in the winter season, we developed a several types of freezing protection valve using PCM whose freezing temperature are 2-4℃. The working principle of the freezing protection valve is that the fluid inside the pipe is released to prevent the system-collapse when fluid temperature reaches the freezing temperature of the PCM. And then the valve is closed and returned to the original position automatically when the temperature of the operating fluid rises. In this paper, the operating temperatures, discharge flow rate and the response characteristics of the valve during the operation are tested and investigated. From the results of this research the freezing protection valves employing PCM are expected to be commercialized in the near future.

고밀도폴리에틸렌 잠열축열재의 축/방열 특성 기초연구

한성옥(Han Seong Ok),이동원(Lee Dong Won),우상국(Woo Sang Kuk),한인섭(Han In Sub),윤응상(Yoon Eung Sang),주문창(Joo Moon Chang),양윤섭(Yang Yun Sub) 한국태양에너지학회 1998 한국태양에너지학회 학술대회논문집 Vol.- No.-