에너지절약을 위한 건축설계 점검프로그램개발

조동우,Cho, D.W. 대한설비공학회 1995 설비저널 Vol.24 No.4

공조취출방식에 따른 공기의 나이 및 환기효율 비교

조동우,Cho, D.W. 대한설비공학회 1999 설비공학 논문집 Vol.11 No.1

In this study, three different supply diffuser types(desktop, floor and ceiling) are compared in view of their ability to distribute supply air to the workstation breathing zone. The measurements on the age of air and the air change effectiveness using the tracer gas method are carried out to analyze the ventilation performance for provision of fresh air between the diffusers. The desktop diffuser type could deliver air directly to the occupants breathing zone with a high degree of effectiveness. The measured local air change effectiveness of the desktop diffuser in the breathing zone was usually 1.13 to 1.23 times greater than that of ceiling and floor diffusers. When the minimum outside air change rate as specified using ASHRAE Standard 62R is supplied with a desktop diffuser type, the volume of outside air can be reduced 13 to 23%, resulting in a commensurate in ventilation energy use.

스마트 주거쾌적 서비스 기술 개발

조동우(Cho, Dong-Woo) 대한건축학회 2022 建築 Vol.66 No.8

다기능온돌시스템을 이용한 자연환기성능 평가

조동우(Cho Dong-Woo),유기형(Yu Ki-Hyung),유정연(Yu Jung-Yeon) 대한건축학회 2007 대한건축학회논문집 Vol.23 No.11

In Korea, all residential buildings adopt floor-heating systems for indoor thermal comfort. And the ratio of multi-family houses exceeds 50%. Lately problems of noise between floors and contamination of indoor air in multi-family houses emerged as social issue, and performance standards related to noise between floors and ventilation were established in Housing Regulation. Concerning these issues, many systems have been developed. Recently developed raised floor heating system is not only capable of basic function to reduce noise between floors, but also is a multi-functional floor heating system enabling natural ventilation. The procedure of this system for natural ventilation is to import outdoor air through bottom space of the floor heating system, circulate indoor space and discharge it out of ceiling. In winter, powerless natural ventilation is possible with buoyancy effect caused by temperature difference between outdoor and indoor. And it also allows saving of energy by importing pre-heated air in bottom space of the floor heating system. To evaluate ventilation performance of this system, on-site measurement was conducted in 2 test laboratories, and the nominal air change rate was satisfied as 0.4~0.8 h<SUP>-1</SUP> under the condition of outdoor temperature 5℃~-5℃, which was evaluated as highly possible to be applied as a natural ventilation system in multi-family houses. So, this system as hybrid ventilation system using natural ventilation is evaluated as highly possible for application. It also allows saving of energy by importing pre-heated air in bottom space of the floor heating system. Moreover, it was proven that air temperature at supply grille was maintained higher than indoor temperature, by which it was proven to enable blocking of cold draft problem.

제로에너지 건물 보급을 위한 국내외 정책 현황

조동우(Cho, Dong-Woo) 대한건축학회 2014 建築 Vol.58 No.3

액체 이산화탄소 이용한 Monasil PCA 추출에 대한 연구

조동우 ( Dong Woo Cho ),오경실 ( Kyoung Shil Oh ),배원 ( Won Bae ),김화용 ( Hwa Young Kim ),이갑수 ( Kab Soo Lee ) 한국화학공학회 2012 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.50 No.4

Poly(acrylic acid) (PAA) microspheres is one of the widely-used polymeric materials for the bio-field application and the electric materials. For the synthesis of PAA microspheres, the polymerization technique using surfactants is applied. After the synthesis, the purification and separation processes are required for the removal of surfactant. When general organic solvents were used, many problems, such as huge amount of waste solvent, additional separation processes, and the possibility of residual media, were occurred. Thus, High-pressure Soxhlet extraction using liquid CO2 was developed to solve these problems. In this study, High-pressure Soxhlet extraction of the synthesized PAA microspheres using liquid CO2 was conducted for the removal of Monasil PCA which is used for the dispersion polymerization of acrylic acid in compressed liquid Dimethyl ether (DME). The morphology of the extracted PAA particles was checked by field emission scanning electron microscopy (FE-SEM) and the residual concentration of Monasil PCA was analyzed by inductively coupled plasma - Optical Emission Spectrometer (ICP-OES). For studying the effect of the solvent effect, Soxhlet extraction was conducted using n-hexane, liquid DME, and liquid CO2. In case of n-hexane, some extracted PAA microspheres were produced. However, deformation was also occurred due to the high thermal energy of n-hexane vapor. Liquid DME could not remove Monasil PCA. When using liquid CO2, the extracted PAA microspheres which were free for the residual solvent were produced without deformation. For finding the optimum operating condition, high-pressure Soxhlet extraction was conducted for 8 hours with changing the temperature of reboiler and condenser. When the extractor temperature is 19.6±0.2 oC and the pressure is 51.5±0.5 bar, the best removal efficiency was obtained.

친환경건축물 인증제도의 현황 및 향후 추진방향

趙東佑(Cho Dongwoo) 대한건축학회 2006 建築 Vol.50 No.3

감성마케팅을 이용한 레스토랑 디자인 연구

조동우 ( Dong Woo Cho ) 한국기초조형학회 2013 기초조형학연구 Vol.14 No.5

현재 우리나라에는 다양한 형태의 해외 외식문화가 들어와 있다. 한식을 기본으로 양식 및 중식, 일식, 동남아식 등 외식문화가 글로벌하게 공존하고 있다. 하지만 레스토랑의 개념이 들어온 시기는 80년대 후반 패밀리 레스토랑의 출범과 함께 시작되었고 역사가 길지 않다. 과거 일반 대중들이 찾을 수 있는 레스토랑은 패밀리 레스토랑과 좀 더 고가인 호텔레스토랑 그리고 식당 개념의 한식 맛 집 정도라고 할 수 있겠다. 하지만 2000년대 초반 까지 번성한 패밀리 레스토랑은 건강식과 좀 더 새로운 분위기를 찾는 소비자들에게 식상해졌고 일반 소비자 들은 좀 더 다양한 외식문화를 갈구하게 되었다. 최근에 들어서는 중저가의 패밀리 레스토랑과는 차별화 되는 고급 해외 체인레스토랑도 주요 상권에 오픈을 하였고 스타 쉐프를 영입한 좀 더 차별화된 외식문화를 제공하는 레스토랑도 증가 하게 되었다. 이제 레스토랑의 개념은 단지 식사를 위한 장소로 사용되지는 않는다. 단지 물리적 공간을 사용하는 것이 아니라 색다른 문화와 차별화된 이미지를 즐기면서 체험하고 소비하는 공간이 되었다. 이런 다양화, 고급화 되는 레스토랑 문화 요구에 해외 레스토랑의 선행조사는 새로운 정보와 문화교류라는 관점에서 국내 외식문화와 레스토랑 실내디자인 분야에 토대가 될 수 있다고 생각한다. Nowadays in Korea, variety of foreign food service culture has been established. Not only Korean traditional food, but western, Japanese, Chinese, Southern-eastern, and man other food cultures coexist. The concept of restaurant emerged in the late 1980`s with family restaurant business, and it has a rather short history. Few decades ago, people did not have any dine-out options other than family restaurant, hotel restaurant, or Korean traditional restaurant. Until early 2000`s, family restaurant business had thrived, however, the trend of well-being and the demand of new food culture estranged customers from those old restaurant. Recently, several high-class foreign restaurants opened their franchise in major business districts offering differentiated services with star chefs. The concept of restaurant has changed gradually. Not just as a place to eat, restaurant became a multi-purpose space where people enjoy, experience, and consume new cultures and images. Pre-survey on luxurious and various overseas restaurant could be a strong base in the field of domestic food service and restaurant interior design in the view of new information and cultural interchange.

DSR 수분민감성 시험과 젖은 조건과 마른 조건의 항복전단 응력 비

조동우(Cho Dong-Woo),이태식(Lee Tai Sik) 대한토목학회 2008 대한토목학회 학술대회 Vol.2008 No.10

공동주택 온돌난방시스템의 최적설계 프로세스

조동우(Dong-Woo Cho),유기형(Ki-Hyung Yu) 대한설비공학회 2011 대한설비공학회 학술발표대회논문집 Vol.2011 No.7

To maintain thermal performance in Ondol system, the elements of system must be considered of the optimal design in order that the thermal performance and hot water flow is efficiently transmitted from the Ondol system in apartment houses. The purpose of this study is to propose the optimal design data and applicable design process of Ondol system. The design process can be applied to cooperate the energy efficient system as well as comfortable indoor thermal environment in the early design stage.