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  • Title/Summary/Keyword: heating control system

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A Study of Modular Architecture's Design to Dwelling Environment in Antarctica (극한지 모듈러 건축물의 설계, 시공 및 거주환경에 대한 연구)

  • Lee, Won-Hak;Song, Young-Hak;Lim, Seok-Ho
    • Journal of the Korean housing association
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    • v.25 no.2
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    • pp.11-18
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    • 2014
  • This study looked at designing, building and operating temporary camp, the first structures that South Korea built in the Antarctica. While there may be differences in accordance with the topography, ground surfaces in the Antarctica are covered broken stones, glaciers and snow. Hence, such topographical characteristics should be taken into account when conducting any construction work. To ensure successful assembly construction in the Antarctica using modules, prior trial assembly work should be done in Korea to identify any possible trouble in the actual construction process. Assuming that the workers will have to spend at least one winter in the temporary camp, the work will be more severely affected by adverse weather conditions and snow drift, resulting in the need to clear snow. This can be by designing roofs with curved surfaces. Also, quantitative effects will need to be verified through simulation and actual measurement. It will also be necessary to assess the camp's thermal environment and examine its air-conditioning methods. To identify the temporary camp's thermal system, the temperatures and humidities were measured, and the heating system was designed not to offer automatic control or desired value selection functions.

Application Study of An On-site Hydrogen Production System for Power Generator Cooling (발전기 냉각용 On-Site 수소 생산 시스템 적용연구)

  • Moon, Jeon-Soo;Lee, Jae-Kun;Park, Pyl-Yang;Park, Kyoung-Il
    • Journal of Hydrogen and New Energy
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    • v.20 no.5
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    • pp.410-415
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    • 2009
  • A hydrogen cooling method is used in a power generator for removing the unnecessary heat due to the windage loss of a rotor and the joule heat of a stator. A MEA (Membrane Electrolyte Assembly) hydrogen generator has been developed and applied as a hydrogen supplying system for the cooling of a 350MW power generator. As a field application result, the average potential of eleven cells and the voltage efficiency were measured 2.26V/cell and 65.4% (Higher Heating Value) respectively at the hydrogen pressure of 6 Bar, the hydrogen flow rate of 9.1L/min, and the current of 150A.

Problems of the Middle East Respiratory Syndrome Outbreak from the Perspective of Environmental Health - Focusing on Control of Indoor Air Quality in Hospitals - (환경보건학적 관점에서 본 메르스 사태의 문제점 - 병원 실내공기질 관리를 중심으로 -)

  • Heo, Da-An;Lee, Junghyun;Huh, Eun-Hae;Moon, Kyong Whan
    • Journal of Environmental Health Sciences
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    • v.41 no.3
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    • pp.216-221
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    • 2015
  • Since Patient Zero of MERS was diagnosed in May 20, 2015, cases of MERS continued to grow. The current situation, which people have been confirmed to be infected, suggested that contaminated indoor air could be the potential cause of hospital-acquired infections. It is important to address the indoor air quality in hospitals because pathogens can spread through air. While the heating, ventilating and air conditioning(HVAC) system is useful managing indoor air quality in hospitals, it can transmit the pathogens if operated improperly. Therefore, it is necessary to remove contaminants in hospitals and operate the HVAC system according to the guidelines, in order to maintain clean indoor air.

Comparison of the Opinion about Senior Congregate Housing (노인공동생활주택에 대한 지역별 견해 비교 - 서울 경기도, 부산, 광주, 대전 지역을 중심으로 -)

  • Hong, Hyung-Ock;Jee, Eun-Young
    • Proceeding of Spring/Autumn Annual Conference of KHA
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    • 2003.11a
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    • pp.127-131
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    • 2003
  • The purpose of this study was 1) to analyze the attitudes about Senior Congregate Housing(SCH) among 4 urban areas, 2) to propose the various model for SCH which should be provided to satisfy the demand. Same opinions among 4 urban areas were ; 1) Whom were willing to move into SCH for later life, most of them were in early 50s. Most of the respondents desired to be serviced community alarm system preferred one-room style, size of 11 15 Pyung, and preferred living at suburban area The multi-family type was preferred when not being healthy and be singled, but if healthy, preferred the type of single detached house. And they preferred the home ownership, highly valued of heating control system, health care and leisure programs. But different opinions among 4 urban areas were ; 2) Willingness live in SCH for later life had little difference in level of income, education, property. Especially, residents of Seoul Metropolitan area and Busan did not want to open their own common facilities to the public.

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BEAD BASED CHEMICAL REACTION SYSTEM USING TEMPERATURE AND FLUID CONTROL FOR CANCER DETECTION (유체와 온도 조절을 이용한 생화학 물질 반응용 마이크로칩의 개발)

  • Kim, Min-Su;Lee, Bo-Rahm;Yoon, Hyo-Jin;Kim, Byung-Gee;Lee, Yoon-Sik;Kim, Yong-Kweon
    • Proceedings of the KIEE Conference
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    • 2008.07a
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    • pp.1466-1467
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    • 2008
  • We describe here a novel micro total analysis system for the purification and identification of the affinity-captured proteins. Also we demonstrated the mass analysis of the Carcinoembrionic antigen (CEA) and Alpha femtoprotein which were chosen as the target cancer marker. For MALDI-TOF analyses, the proteins should to be separated from a protein mixture and be concentrated when needed. This procedure usually takes a long time even before protease-digested samples are to be obtained from them. Here, we describe integrated and efficient micro chip for protein purification and digestion for MALDI-TOF analyses. At first, disease protein is purified by passing the micro chamber from a protein mixture or human whole serum and released from the micro affinity beads by thermal heating. Purified protein is then transfer to the hole for trypsin digestion. The final sample is analyzed by MALDI-TOF. All the processes could be finished successfully within one hour, which renders MALDI-TOF analyses of a target protein quite simple.

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Determining the Priority of Factors for Reducing Energy at Deteriorated School Buildings Using AHP Method (AHP 방법을 이용한 노후학교 에너지절감을 위한 요소기술의 우선순위 결정)

  • Lhee, Sang-Choon;Choi, Young-Joon;Choi, Yool
    • KIEAE Journal
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    • v.11 no.6
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    • pp.127-132
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    • 2011
  • Since the late 20th century, countries of the world have made every effort to solve environmental problems due to global warming. The Korean Government has also made various efforts on reducing energy and CO2 emission under the motto of "Low-Carbon Green Growth". In order to achieve the goal to reduce energy in the construction field, severe design standards and regulations on saving energy in new buildings have been established. However, for maximizing the reduction of energy in buildings, it is time to focus on deteriorated buildings where applications of energy saving designs and techniques have been insufficient. Especially, there are little guidelines and researches on reducing energy through remodeling at deteriorated school buildings which were built over 20 years ago. This paper suggests the priority of factors to reduce energy on the remodeling process at deteriorated school buildings using the AHP(Analytic Hierarchy Process) method. For applying the AHP method, the survey of staffs in the Education Offices and board members in the Korea Institute of Ecological Architecture and Environment was conducted via e-mail. As a result, factors of insulation, daylighting, system control, and windows turned out important in the energy reducing remodeling process at deteriorated school buildings, while factors of artificial lighting, solar heating, ventilation, and system did relatively unimportant.

Fabrication and Characteristics of NiO-AZO Thin Films Deposited by Co-sputtering System for GaN LED Transparent Contact Electrode (코스퍼터링법을 이용한 GaN LED 투명접촉전극용 NiO-AZO 박막의 제조 및 물성평가)

  • Park, Hee-Woo;Bang, Joon-Ho;Hui, Kwun Nam;Song, Pung-Keun
    • Journal of Surface Science and Engineering
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    • v.44 no.6
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    • pp.250-254
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    • 2011
  • NiO-AZO films were deposited on glass substrate by DC and RF magnetron co-sputtering system in pure O2 gas without substrate heating during deposition. In order to control the chemical composition of the film, NiO target was supplied with constant RF power of 150 W and AZO target (doped with 2.98 at% aluminum) with DC power varied between 40 W to 80 W. Deposited NiO-AZO films were evaluated by structural and chemical analysis. With introducing AZO, XRD and XPS data reveal that NiO were supplied with more oxygen. these results could be strongly affected by the higher bond enthalpy of NiO compared to ZnO, which makes it possible for NiO to obtain excessive oxygen from ZnO.

Development of Robust Intelligent Digital Controller for Smart Space (스마트 스페이스 구축을 위한 강인 지능형 디지털 제어기 개발)

  • Joo, Young-Hoon
    • Journal of the Korean Institute of Intelligent Systems
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    • v.18 no.1
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    • pp.60-65
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    • 2008
  • In this paper, we concern the stability of smart space by using the robust digital controller. The proposed methodologies are based on the intelligent digital redesign (IDR). More precisely, we represent the nonlinear and uncertain analog system as the Takaki-Sugeno (T-S) fuzzy model. Then the IDR problem can be reduced to find the digital gains minimizing the norm distance between the closed-loop states of the analog and digital control. Its constructive conditions are expressed as the linear matrix inequalities (LMIs). At last, a numerical example, HVAC system, is demonstrated to visualize the feasibility of the proposed methodology.

Comparison of the Opinion about Senior Congregate Housing -with Special Focus to the Areas of Seoul Metropolitan Area, Busan, Gwangaju, and Daejun- (노인공동생활주택에 대한 지역별 견해 비교 -서울ㆍ수도권, 부산, 광주, 대전 지역을 중심으로-)

  • 홍형옥;지은영
    • Journal of the Korean housing association
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    • v.15 no.1
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    • pp.163-174
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    • 2004
  • The purpose of this study was 1) to analyze the attitudes about Senior Congregate Housing(SCH) among 4 urban areas, 2) to propose the various model for SCH which should be provided to satisfy the demand. Same opinions among 4 urban areas were ; 1) Whom were willing to move into SCH for later life, most of them were in early 50s. Most of the respondents desired to be serviced community alarm system, preferred one-room style, size of 11∼15 Pyung, and preferred living at suburban area. The multi-family type was preferred when not being healthy and be singled, but if healthy, preferred the type of single detached house. And they preferred the home ownership, highly valued of heating control system, health care and leisure programs. Thus for the future SCH, it should be designed all facilities were equipped with sports facilities, sauna and leisure programs. The findings indicated that the high rates of supporting with professional management for 24 hours by turn. But different opinions among 4 urban areas were; 2) Willingness live in SCH for later life had little difference in level of income, education, property. Especially, residents of Seoul Metropolitan area and Busan did not want to open their own common facilities to the public.

A Study on the Factors Affecting the Performance of Paper Heat Exchanger for Exhaust Heat Recovery (배기열 회수용 종이 열교환기의 성능에 영향을 미치는 인자에 관한 연구)

  • Chung Min-Ho;Yoo Seong-Yeon
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.17 no.10
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    • pp.956-964
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    • 2005
  • In order to control indoor air quality and save energy, it is needed to install a suitable ventilation system equipped with heat exchanger for heat recovery The purpose of this research is to find the factors affecting the performance of paper heat exchanger for exhaust heat recovery, which can be applied directly to the conventional ventilation unit, air-purifier, and air-conditioning system. In this study, thermal performance and pressure loss of the paper heat exchanger are measured and compared at various operating conditions. The effectiveness of sensible, latent and total heat at the face velocity of 0.75 m/s are 77%,47%and57% in the cooling condition and 77%,59%,and% in the heating condition, respectively. The effectiveness for sensible heat is only affected by velocity. On the other hand, the effectiveness for latent heat is affected. by temperature and relative humidity.