바닥취출 공조방식을 적용한 대규모 공연장의 온열환경 예측평가

장희경(Jang Hee-Kyung),여인애(Yeo In-Ae),윤성환(Yoon Seong-Hwan) 한국건축친환경설비학회 2009 한국건축친환경설비학회 논문집 Vol.3 No.3

According as the economy develops and the level of living quality rises, a large enclosure buildings such as the center of a large-scale international conferences, exhibitions, a large sports facilities are increasing in domestic as well as advanced countries. This large enclosure buildings have generally large space volume and a high density of occupancy per unit floor area compared to other buildings. Especially, it has the feature that the thermal environment has big difference horizontally as well as vertically and living spaces are restricted within nearby floor area. Also, this spaces have special thermal characters and airflow mechanism each other. CFD simulation can analyze the various thermal characters of large enclosure buildings exactly. The merit of simulation is that it can minimize the error in planning step by analyzing various airflow and thermal character in advance when the air conditioning works. Recently, the use of the under floor supply air conditioning system are increasing. This system air conditions not total space but the living space nearby the floor is by installing inlet on floor or under the seats. This study aimed at predictive evaluation of thermal environment in a large-scale auditorium appling the under floor supply air conditioning system by using CFD simulation. From thermal environment point of view in the residential field, the results of this study are as follows; 1) In cooling condition, all CASEs satisfy allowable supply air velocity 0.35m/s and CASE 2 and CASE 5 at which supply air temperature is about 20℃ are suitable condition. 2) In heating condition, all CASEs satisfy allowable supply air velocity 0.5m/s and CASE 7 and CASE 9 at which supply air temperature is about 22℃ are suitable condition.

건축온열환경의 설계ㆍ관리조건 및 환경조절기술의 발전에 관한 연구

강병수(Kang Boung Soo) 한국퍼실리티매니지먼트학회 2000 한국퍼실리티매니지먼트학회지 Vol.2 No.1

The study aims to examine the development of environment of control technology and changes ofthe thermal environment index in order to orient the direction for the drawing standards andmanagement standards for thermal environment system. The following are the results. 1. While temperature and heat radiation are considered as the factor of the thermalenvironment condition in Europe, humidity is considerded in the United States 2. Thermal environment conditions are not definitely distinguished in drawing conditionmanagement condition respectively.

물리적 온열환경 요소들이 선택적 주의 기제의 행동 반응에 미치는 영향

김보성,민윤기,민병찬,김진호 한국자료분석학회 2011 Journal of the Korean Data Analysis Society Vol.13 No.5

This study examined effect of physical thermal factors in indoor environment on occupant's behavioral responses associated with mechanisms of the selective attention. For this purpose, the changes of physical thermal factors were induced by the heating and cooling operations of the HVAC systems, and occupant's behavioral responses were measured using the visual search task reflected mechanisms of the selective attention. As a result, the humidity, mean radiant temperature, and air velocity except the temperature affected occupant's performances. It is suggested that the development of HVAC systems which other factors except temperature could be appropriately controlled would be required. In addition, reductions of the humidity and increases of the mean radiant temperature were required to promote performances in the heating air condition, but decreases of the mean radiant temperature were required to promote performances in the cooling air condition. It is suggested that the development of interior materials which the latent heat would be maintained or destroyed depending on the season would be required. 본 연구는 실내 환경의 물리적 온열 요소들이 재실자의 선택적 주의 기제와 관련된 행동 반응에 미치는 영향을 살펴보고자 하였다. 이를 위해 기존 공조 시스템의 냉ㆍ난방 가동에 따라 물리적 온열 요소들의 변화를 유도하고, 선택적 주의 기제를 반영하는 시각 탐색 과제를 활용하여 재실자의 행동 반응을 살펴보았다. 그 결과, 물리적 온열 환경 요소들 중 온도를 제외한 습도, 평균복사온도와 기류속도가 재실자의 수행에 영향을 미치는 것으로 나타났다. 이는 온도 이외의 다른 요소들을 적절하게 제어할 수 있는 공조 시스템의 개발이 요구됨을 시사하는 것이다. 한편 난방 조건에서는 수행 촉진을 위해 습도의 감소 및 평균복사온도의 증가가 요구되는 반면, 냉방 조건에서는 오히려 평균복사온도의 감소가 요구되는 것으로 나타났다. 이는 실내 환경이 간직하고 있는 잠열이 계절에 따라 다르게 유지 및 소멸될 수 있도록 하는 내장재의 개발 역시 요구됨을 시사하는 것이다.

국내 연안여객선(590인승 Ro-pax) 선실내 봄철 온열 환경 측정평가

김은수(Eun-su Kim),최윤석(Yun-Seok Choi),최정열(Jung-Yul Choi),도요한(Yo-Han Do),황광일(Kwang-il Hwang) 한국마린엔지니어링학회 2008 한국마린엔지니어링학회 학술대회 논문집 Vol.2008 No.-

The purpose of this study is to measure a thermal conditioning enviroment on the Ro-pax ship in spring. The temperature, humidity, air supply volume of each cabins to control the open-rate of diffuser (100%, 50%, 0%) are measured. On measuring process, (1) It is cleared that the inner conditions are not within the comfort area proposed by ASHRAE at 100% open-rate on standard (2) We find the possible to control within ASKRAE comport condition area from controling the open-rate of diffuser. but. It is predicted IAQ(Indoor air quality) is deteriorated to be controled under the reasonable air supply volrume.

신조 운항실습선의 계절별 쾌적범위 만족율 변화

김은수(Eun-su Kim),신동걸(Dong-keol Shin),이진욱(Jin-uk Lee),이상일(Sang-il Lee),이형기(Hyong-ki Lee),황광일(Kwang-il Hwang) 한국항해항만학회 2008 한국항해항만학회 학술대회논문집 Vol.2008 No.공동학술

The purpose of this study is to analyze the measured thermal conditions of the various cabins in a newly-launched 6,700 tonnage training ship on each season. The temperature, humidity, air supply volume of each cabins' are measured. On Analyzing processes, it is cleared that this ship is possible to control temperature within ASHRAE comport condition area, but humidity is different. So, the study about the controling humidity is needed in future.

국내 연안여객선(590인승 Ro-pax) 선실내 봄철 온열 환경 측정평가

김은수(Eun-su Kim),최윤석(Yun-Seok Choi),최정열(Jung-Yul Choi),도요한(Yo-Han Do),황광일(Kwang-il Hwang) 한국항해항만학회 2008 한국항해항만학회 학술대회논문집 Vol.2008 No.공동학술

The purpose of this study is to measure a thermal conditioning enviroment on the Ro-pax ship in spring. The temperature, humidity, air supply volume of each cabins to control the open-rate of diffuser (100%, 50%, 0%) are measured. On measuring process, (1) It is cleared that the inner conditions are not within the comfort area proposed by ASHRAE at 100% open-rate on standard (2) We find the possible to control within ASHRAE comport condition area from controling the open-rate of diffuser. but It is predicted IAQ(Indoor air quality) is deteriorated to be controled under the reasonable air supply volrume.

신조 운항실습선의 계절열 쾌적범위 만족율 변화

김은수(Eun-su Kim),신동걸(Dong-keol Shin),이진욱(Jin-uk Lee),이상일(Sang-il Lee),이형기(Hyong-ki Lee),황광일(Kwang-il Hwang) 한국마린엔지니어링학회 2008 한국마린엔지니어링학회 학술대회 논문집 Vol.2008 No.-

The purpose of this study is to analyze the measured thermal conditions of the various cabins in a newly-launched 6,700 tonnage training ship on each season. The temperature, humidity, air supply volume of each cabins' are measured. On Analyzing processes, it is cleared that this ship is possible to control temperature within ASHRAE comport condition area, but humidity is different. So, the study about the controling humidity is needed in future.

설비공학 분야의 최근 연구 동향

한화택(Hwataik Han),신동신(Dong Sin Shin),최창호(Chang-Ho Choi),이대영(Dae-Young Lee),김서영(Seo Young Kim),권용일(Yong-Il Kwon) 대한설비공학회 2008 설비공학 논문집 Vol.20 No.12

The papers published in the Korean Journal of Air-Conditioning and Refrigeration Engineering during the year of 2007 have been reviewed. Focus has been put on current status of research in the aspect of heating, cooling, ventilation, sanitation and building environments. The conclusions are as follows. (1) The research trends of fluid engineering have been surveyed as groups of general fluid flow, fluid machinery and piping, etc. New research topics include micro nano fluid, micro-pump and fuel cell. Traditional CFD was still popular and widely used in research and development. Studies about fans and pumps were performed in the field of fluid machinery. Characteristics of flow and fin shape optimization are studied in the field of piping system. (2) The research works on heat transfer have been reviewed in the field of heat transfer characteristics, heat exchangers, and desiccant cooling systems. The research on heat transfer characteristics includes thermal transport in pulse tubes, high temperature superconductors, ground heat exchangers, fuel. cell stacks and ice slurry systems. For the heat exchangers, the research on pin-tube heat exchanger, plate heat exchanger, condensers and gas coolers has been cordially implemented. The research works on heat transfer augmenting tubes have been also reported. For the desiccant coating systems, the studies on the design and operating conditions for desiccant rotors as well as performance index are noticeable. (3) In the field of refrigeration, many papers were presented on the air conditioning system using CO2 as a refrigerant. The issues on the two-stage compression, the oil selection, and the appropriate oil charge were treated. The subjects of alternative refrigerants were also studied steadily. Hydrocarbons, DME and their mixtures were considered and various heat transfer correlations were proposed. (4) Research papers have been reviewed in the field of building facilities by grouping into the researches on heat and cold sources, air conditioning and air cleaning, ventilation and fire research including tunnel ventilation, flow control of piping system, and sound research with drain system. Main focuses have been addressed to the promotion of efficient or effective use of energy, which helps to save energy and results in reduced environmental pollution and operating cost. (5) Studies were mostly focused on analyzing the indoor environment in various spaces like cars, old tombs, machine rooms, and etc. in an architectural environmental field. Moreover, subjects of various fields such as the evaluation of noise, thermal environment, indoor air quality and development of energy analysis program were researched by various methods of survey, simulation, and field experiment.

설비공학 분야의 최근 연구 동향

한화택(Hwataik Han),이대영(Dae-Young Lee),김서영(Seo Young Kim),최종민(Jong Min Choi),백용규(Yong Kyu Baik),권영철(Young-Chul Kwon) 대한설비공학회 2010 설비공학 논문집 Vol.22 No.7

This article reviews the papers published in the Korean Journal of Air-Conditioning and Refrigeration Engineering during 2009. It is intended to understand the status of current research in the areas of heating, cooling, ventilation, sanitation, and indoor environments of buildings and plant facilities. Conclusions are as follows. (1) Research trends of thermal and fluid engineering have been surveyed as groups of general thermal and fluid flow, fluid machinery and piping, and new and renewable energy. Various topics were covered in the field of general thermal and fluid flow such as an expander, a capillary tube, the flow of micro-channel water blocks, the friction and anti-wear characteristics of nano oils with mixtures of refrigerant oils, etc. Research issues mainly focused on the design of micro-pumps and fans, the heat resistance reliability of axial smoke exhaust fans, and hood systems in the field of fluid machinery and piping. Studies on ground water sources were executed concerning two well type geothermal heat pumps and multi-heat pumps in the field of new and renewable energy. (2) Research works on heat transfer area have been reviewed in the categories of heat transfer characteristics and industrial heat exchangers. Researches on heat transfer characteristics included the heat transfer in thermoelectric cooling systems, refrigerants, evaporators, dryers, desiccant rotors. In the area of industrial heat exchangers, researches on high temperature ceramic heat exchangers, plate heat exchangers, frosting on fins of heat exchangers were performed. (3) In the field of refrigeration, papers were presented on alternative refrigerants, system improvements, and the utilization of various energy sources. Refrigeration systems with alternative refrigerants such as hydrocarbons, mixed refrigerants, and CO2 were studied. Efforts to improve the performance of refrigeration systems were made applying various ideas of suction line heat exchangers, subcooling bypass lines and gas injection systems. Studies on heat pump systems using unutilized energy sources such as river water, underground water, and waste heat were also reported. (4) Research trend in the field of mechanical building facilities has been found to be mainly focused on field applications rather than performance improvements. In the area of cogeneration systems, papers on energy and economic analysis, LCC analysis and cost estimating were reported. Studies on ventilation and heat recovery systems introduced the effect on fire and smoke control, and energy reduction. Papers on district cooling and heating systems dealt with design capacity evaluation, application plan and field application. Also, the maintenance and management of building service equipments were presented for HVAC systems. (5) In the field of architectural environment, various studies were carried to improve indoor air quality and to analyze the heat load characteristics of buildings by energy simulation. These studies helped to understand the physics related to building load characteristics and to improve the quality of architectural environment where human beings reside in.

설비공학 분야의 최근 연구 동향

한화택(Hwataik Han),최창호(Chang-Ho Choi),이대영(Dae-Young Lee),김서영(Seo Young Kim),권용일(Yong-Il Kwon),최종민(Jong Min Choi) 대한설비공학회 2009 설비공학 논문집 Vol.21 No.12

This article reviews the papers published in the Korean Journal of Air-Conditioning and Refrigeration Engineering during 2008. It is intended to understand the status of current research in the areas of heating, cooling, ventilation, sanitation, and indoor environments of buildings and plant facilities. Conclusions are as follows. (1) Research trends in thermal and fluid engineering have been surveyed in the categories of general fluid flow, fluid machinery and piping, new and renewable energy, and fire. Well-developed CFD technologies were widely applied in developing facilities and their systems. New research topics include fire, fuel cell, and solar energy. Research was mainly focused on flow distribution and optimization in the fields of fluid machinery and piping. Topics related to the development of fans and compressors had been popular, but were no longer investigated widely. Research papers on micro heat exchangers using nanofluids and micro pumps were also not presented during this period. There were some studies on thermal reliability and performance in the fields of new and renewable energy. Numerical simulations of smoke ventilation and the spread of fire were the main topics in the field of fire. (2) Research works on heat transfer presented in 2008 have been reviewed in the categories of heat transfer characteristics, industrial heat exchangers, and ground heat exchangers. Research on heat transfer characteristics included thermal transport in cryogenic vessels, dish solar collectors, radiative thermal reflectors, variable conductance heat pipes, and flow condensation and evaporation of refrigerants. In the area of industrial heat exchangers, examined are research on micro-channel plate heat exchangers, liquid cooled cold plates, fin-tube heat exchangers, and frost behavior of heat exchanger fins. Measurements on ground thermal conductivity and on the thermal diffusion characteristics of ground heat exchangers were reported. (3) In the field of refrigeration, many studies were presented on simultaneous heating and cooling heat pump systems. Switching between various operation modes and optimizing the refrigerant charge were considered in this research. Studies of heat pump systems using unutilized energy sources such as sewage water and river water were reported. Evaporative cooling was studied both theoretically and experimentally as a potential alternative to the conventional methods. (4) Research papers on building facilities have been reviewed and divided into studies on heat and cold sources, air conditioning and air cleaning, ventilation, automatic control of heat sources with piping systems, and sound reduction in hydraulic turbine dynamo rooms. In particular, considered were efficient and effective uses of energy resulting in reduced environmental pollution and operating costs. (5) In the field of building environments, many studies focused on health and comfort. Ventilation system performance was considered to be important in improving indoor air conditions. Due to high oil prices, various tests were planned to examine building energy consumption and to cut life cycle costs.