플리넘이 있는 경계층 방류슬롯 내부의 유동 특성

전용두 한국항공우주학회 1997 한국항공우주학회 학술발표회 논문집 Vol.- No.-

배가스 폐열회수를 위한 히트파이프 적용성 검토

전용두,박기호,고석보 公州大學校 工學硏究院 生産技術硏究所 2005 論文集 Vol.13 No.-

A Series of experiments are performed to investigate the heat transfer characteristics of sintered metal wick heat pipe especially focusing on the operational limit of maximum allowable thermal loads and the effect of inclination slope. Tested heat pipes are composed of copper tube with pure water as a working fluid. The outer diameter of the heat pipe is 6mm and the total length is 300mm, which covers the evaporator section(50mm), adiabatic section(100mm) and condenser section(150mm). respectively. Experimental data of wall temperature distribution along the axial locations are obtained to evaluate the performance of the heat pipe at different slopes. Each test is performed by changing the input thermal loads ranging from 5W to 30W.

공조시스템을 적용한 석실 고분내 온ㆍ습도 분포

전용두,이금배,박진양,고석보,전희호 公州大學校 工學硏究院 生産技術硏究所 2005 論文集 Vol.13 No.-

Although the importance of good conservation of historic sites including ancient royal tombs is well aware, still not much attention has been paid for the facilities and systems to preserve those historic sites, which includes precious artifacts as wall paints and carved works, etc. Even the general understanding about the environment of the underground space of tombs is not satisfactory. In Korea, researchers have recently begun addressing the above issue and are making efforts to develop suitable HVAC(heating, ventilating and air-conditioning) systems for conservation of tombs. An experimental investigation was carried out to study the behavior of the HVAC system installed for a tomb. This tomb resembles in size and shape the original stone built tomb of Baek-je Dynasty, which dates back to 6th Century in southwest part of Korean peninsula. In this study, an HVAC system for a tomb(D×W×H=1.3m×3.0m×1.2m) was installed to maintain sui표 indoor conditions for conservation of tomb. The temperature and humidity inside the tomb were measured different of the setting. Finally, performance of the HVAC system is presented and discussed.

공주대학교 자동차의장 및 편의부품 지역혁신센터

전용두 한국소음진동공학회 2016 소음 진동 Vol.26 No.5

고분내부에 설치된 공조시스템의 운전특성

전용두,이금배,전희호,고석보,박진양,윤영묵 한국에너지학회 2006 에너지공학 Vol.15 No.3

문화재적 가치를 지닌 고분의 장기보존을 위하여 고분보존용 공조시스템을 개발할 목적으로 공조시스템을 적용한 고분내부의 실내환경 자료를 확보하고자 공조시스템을 적용한 실물고분을 제작하고, 온·습도 및 공조기의 실내기에 의한 진동수준을 측정하고 검토하였다. 외기의 상대습도가 그다지 높지않은 4월중의 온·습도 측정결과 고분 내부의 온·습도변화는 희망제어조건(온도 22±1oC와 상대습도 55±3%)을 다소 초과하는 것으로 나타났다. 운전중 실내기에 의한 진동측정 결과 교통 혹은 기계진동에 의한 문화재 및 기타 진동예민구조물에 대한 스위스 규정보다는 크게 낮은 결과를 얻었으나, 취약건물/문화재 등 주요구조물에 관한 독일규격(DIN4150)에 정하는 무진동 상태를 만족시키지는 못하는 것으로 나타났다.

횡류팬 유로최적화를 위한 수치실험

전용두,이종수 공주대학교 생산기술연구소 2002 論文集 Vol.10 No.-

Cross flow fan system is widely used for various applications, especially for the air-moving device of heaters, air-conditioners, and air-curtains. Although there are efforts for the optimization of cross-flow fan flow path with different methods of approach, it is still being investigated by many researchers through experimentally and/or theoretically, because the flow pattern of the cross flow fan is not stereotyped. This paper presents some results from numerical experiments for optimization of the flow path through a cross-flow fan to be applied to indoor wall-mounted room heater. Two dimensional analysis has been applied to a specific fan system including inlet and diffuser outlet. Flow characteristics are presented and discussed for two different flow path at three different operating conditions represented by rotational speed(800, 1,000, 1,200 rpm) of the fan. According to the simulated results for the specific fan system under consideration, it could be found that the flow pattern resembles each other at different rotational speed (to say from 800 rpm to 1,200 rpm) for a fixed flow path, while the secondary flows mostly absorbs the speed effects. By changing the flow path significant increase in volume flow rate is estimated upto 2.65 at the same rotational speed. According to the present experience, fan flow path design can be performed more efficiently by incorporating this type of numerical experiments combined with the model tests.

벡터형 방향 스윕을 이용한 Block Tridiagonal ( BT ) 시스템의 병렬화 기법 ( Vectorized Directional Sweep Based Parallelization Technique for Block Tridiagonal System )

전용두 대한기계학회 1997 대한기계학회 춘추학술대회 Vol.- No.-

동절기 신관리 석실고분 내부의 온·습도 분포특성

전용두,이금배,김홍기,고석보 공주대학교 문화재보존과학연구소 2004 문화재과학기술 Vol.3 No.1

개방된 고분의 장기보존은 조상의 얼이 담긴 문화재를 길이 후손에 물려주어야 하는 우리들의 시대적 사명이라 할 수 있다. 그런데 고분 내부의 공기조화를 필요로 하는 경우 설비측면에서 고분내부의 공기조화 문제를 검토한 사례는 그 동안 많지 않았다. 특히 고분 내부환경에 관한 온·습도 자료는 매우 제한적으로 알려져 있는 상태이다. 본 연구는 고분의 공기조화와 관련하여 부하산정 등의 기초자료로 활용하기 위한 고분내부의 온·습도자료를 원격측정 기술을 적용하여 획득한 결과를 소개하며, 이를 통하여 고분내부의 실내환경 조건에 대한 일반의 이해를 돕고, 더 나아가 공조기 설치에 필요한 기초자료를 제공하고자 수행하였다. 측정 연구대상은 충남 공주시 신관동에 소재한 신관리석실고분(충청남도 기념물 제 7호)으로서 백제후기의 횡혈식 석실고분으로서 현실의 크기는 폭 1.25m, 깊이 2.73m 그리고 높이 1.50m이며, 현실입구는 개방된 상태에서 실내 5채널 및 실외공기에 대하여 각각 온도와 습도를 측정하였으며, 본 본문에서는 동절기(12월부터 다음 해 3월까지)의 자료를 소개한다. In recent years the importance of the preservation of cultural artefacts like ancient tombs has been widely accepted domestically and internationally as the quality of life improves. However not much attention has been paid for the facilities and systems to preserve those artefacts. Even the general understanding of the preservatory environment of the underground space as tombs is poor. In the present study, the temperature and relative humidity inside a selected artefact, Shinkwan-ri tomb, are monitored to improve the understanding of the indoor thermal environment, which may possibly be used when one consider air-conditioning for preservation. Total of 12 channel data are collected by using remote data acquisition system based on the cdma(Code Division Multiple Access) technology. Three-month-data representing winter season is reported with discussions.

배플판이 없는 순환유동층 열교환기의 전열특성 및 압력강하

전용두,이금배,김엄기,이영림 대한설비공학회 2002 설비공학 논문집 Vol.14 No.12

A new fluidized bed heat exchanger for exhaust gas heat recovery is developed. Compared to the existing ones, the present heat exchanger system is featured by the particle fluidization method which does not depend on conventionally used baffle plate with holes and by the multiple downcomer tubes to extract heat energy from hot particle during the time particles moves down to be fed again to the hot gas line. Particles are introduced to the main hot gas stream alongside the pipe circumference. The heat exchanger performance and pressure drop are evaluated through experiments for the present gas-to-water heat exchanger system.

연도가스 열회수용 순환유동층 열교환기의 오염저감특성

전용두,이금배 대한설비공학회 2004 설비공학 논문집 Vol.16 No.8

Fouling and cleaning tests are performed for a uniquely designed 7,000kcal/hr fluidized bed heat exchanger for exhaust gas heat recovery. Fuel rich condition is maintained in the combustor for a limited time period to generate soot that is to be deposited on the heat transfer surfaces(fouling) and 600m glass beads are circulated inside the heat exchanger system for cleaning and enhancing the heat transfer performance. According to the present experimental study, performance degradation mode could be monitored and the effect of particle circulation on the heat transfer improvement could be identified. Through the present study, it is demonstrated that circulating particles contribute not only to the fouling reduction in gas side, but also to the heat transfer enhancement of the unit, while other possible aging factors including water side corrosion seemed to contribute to the accumulated performance deterioration.