• 제목/요약/키워드: air conditioner system

검색결과 407건 처리시간 0.026초

동적시뮬레이션을 위한 시스템 멀티에어컨의 모델링 (Modelling of System Air-Conditioner for Dynamic Simulation)

  • 이윤종;김찬중;문제명;김철우;서형준;김경록;신행조;홍희기
    • 대한설비공학회:학술대회논문집
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    • 대한설비공학회 2007년도 동계학술발표대회 논문집
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    • pp.328-333
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    • 2007
  • The purpose of this study is modelling of system air-conditioner for TRNSYS. System air-conditioner is operated by a variable capacity compressor and accommodated by multiple evaporators. By reason of these feature, realizing performance of system air-conditioner for TRNSYS was incomplete. In this study performance data of system air-conditioner and control logics are used to make system air-conditioner module for TRNSYS. Performance data contains total capacity, power input and capacity index of system air-conditioner. The simulation was carried out in a mode of temperature level control using TRNSYS 16. The simulation shows that the system air-conditioner model operate variable capacity and can compute capacity index and power input of system.

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시스템 에어컨에 의한 실내 소음 평가 및 개선 설계 (Estimation of the Noise Caused by the System Air Conditioner and its Improvement)

  • 이제원;주재만;오상경;송용재
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2004년도 추계학술대회논문집
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    • pp.862-865
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    • 2004
  • The system air conditioner has an outdoor unit and a number of indoor units, which connected by several long pipes. In comparison with building HAVC system, the system air conditioner doesn't need lots of facilities, such as control of room, cooling tower, etc. At the beginning stage for the market of the system air conditioner, its main application was a school which size is small to use the building HAVC and large to use home air conditioning system, such as PAC (package air conditioner), RAC (room air conditioner). Therefore, because of the advantages of the system air conditioner mentioned above, the market is expanded rapidly. Since it is difficult to evaluate the noise caused by the system air conditioner because it has to be implemented before the finish of construction, the prediction or estimation of the noise by using CAE technology should be very important. In this research, using a commercial code, RAYNOISE, the noise is estimated to improve the design of building.

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자동차 에어컨 냉매 가스 누설에 대한 고장사례 고찰 (A Study of Failure Examples for Refrigerant Gas Leakage in Automotive Air Conditioner System)

  • 이일권;국창호;문학훈;유창배
    • 한국가스학회지
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    • 제20권2호
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    • pp.10-15
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    • 2016
  • 이 논문의 목적은 자동차 에어컨 가스 누설에 관련된 고장사례를 분석하고 고찰한 것이다. 첫 번째 사례는 냉매가 누설된 상태에서 에어컨 컴프레서가 계속 작동되었다. 이로 인해 에어컨 컴프레서 내부의 피스톤이 윤활부족으로 인해 피스톤이 부분적으로 에어컨 컴프레서 내부의 실린더에 소착되는 현상이 발생하였다. 이것이 엔진작동 중 부하를 증대시켜 엔진의 회전수 변동과 함께 엔진의 작동이 정지되는 현상이 발생된 것으로 확인되었다. 두 번째 사례는 에어컨 라인과 관련 시스템을 확인한 결과 에어컨 컴프레서에서 뒤쪽으로 가는 컨덴서 고압파이프에서 미세한 균열에 의해 에어컨 냉매 가스가 누설되는 것을 확인하였다. 세 번째 사례는 에어컨 컨덴서 핀 부에서 육안으로 확인하기 어려운 미세한 크랙에 의해 컨덴서 내부 안쪽에서 에어컨 가스가 미세하게 누설되는 것을 확인하였다. 따라서, 에어컨 시스템은 에어컨 냉매가스에 의해 자동차의 실내의 온도를 낮춰 공기조화를 하는 시스템이므로 최적의 상태를 유지할 수 있도록 철저한 관리를 하도록 하여야 한다.

시스템에어컨의 냉매충전량에 따른 사이클 운전특성 및 냉매량 판독 프로그램 개발 (Effect of Charged Refrigerant Amount on Operating Characteristics and Development of Detecting Program for System Air-Conditioner)

  • 태상진;김훈모;문제명;김종엽;권형진;조금남
    • 대한설비공학회:학술대회논문집
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    • 대한설비공학회 2005년도 동계학술발표대회 논문집
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    • pp.427-432
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    • 2005
  • This study developed a program for detecting charged refrigerant amount in system air-conditioner. System air-conditioner is an air-conditioning system with multiple indoor units. Due to the complexity of the system, it is more difficult to detect the refrigerant amount charged in system air-conditioner than in a general single air-conditioner. Experiments were performed for 6 HP outdoor units with 3 indoor units in a psychrometric calorimeter. The experimental amount of charged refrigerant were ranged from 60% to 140% with 10% increasement. Fuzzy algorithm were emploeed for detecting the charged refrigerant amount in a system air-conditioner. The experimental data were used for curve fitting for general ranges for indoor and outdoor temperature conditions. membership function were determined for whole ranges of experimentally measured data and rulebase were defined for each amount of refrigerant charge. Developed program successfully predicted the measured data within 10% resolution range.

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교실 음향에 대한 에어컨 소음의 영향 (The Effects of Air Conditioner Noise on Classroom Acoustics)

  • 김수연;전진용
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2005년도 춘계학술대회논문집
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    • pp.176-179
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    • 2005
  • A case-study in classroom acoustics was conducted and the effects of two types(system air conditioner and packaged air conditioner) of air conditioner were investigated. Acoustical measurements were made in two different classrooms. Each classroom has different acoustics showing sound quality of air conditioner. Mental concentration test was conducted to evaluate the effects of air conditioner noise with different sound presure level(dBA). Speech intelligibility test was also planed with adopting Korean phonetic balanced words.

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차량용 냉방시스템에의 열전소자 적용에 관한 연구 (A Study on the Application of Thermoelectric Module in the Air Conditioner System Using Automotive)

  • 김순호
    • 동력기계공학회지
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    • 제12권4호
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    • pp.32-38
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    • 2008
  • The improvement of cooling ability for the air conditioner is the most efficient method of application of its system. Therefore, this study has been investigated the improvement of cooling ability for the air conditioner using automotive by attached of a thermoelectric module. According to the result of test, capacity of the thermoelectric module make temperature range from $-75^{\circ}C$ to $+300^{\circ}C$ possible to cooling and exothermic. In addtion to, the reduction effect of energy revealed and the effect of liquid hammer remained with safety by attached the thermoelectric module. It was found that the air conditioner system by attached thermoelectric module have better cooling ability than the air conditioner system of existing vehicle.

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차량용 에어컨의 성능에 미치는 인자에 관한 연구 (Parametric Study on Performance of an Automobile Air Conditioner)

  • 박윤철;권기린
    • 동력기계공학회지
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    • 제6권4호
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    • pp.16-22
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    • 2002
  • This study was conducted to find performance evaluation method for automobile air conditioner. Experimental facilities were constructed to simulate wide range of operating condition for the automobile air conditioner. Compressor speed was controled by variable speed electric motor and the power was measured through torque transducer and tachometer was used to measure compressor speed. Parametric studies were conducted in this study, to figure out effect of environment variables on the performance of the automobile air conditioner. The environmental variables are inlet air temperature, relative humidity and air flow rate for the evaporator and inlet air temperature and air flow rate for the condenser. Compressor speed is also changed. The results of this study shows that air flow rate of the evaporator is more sensitive to the performance of the automobile air conditioner than the other variables. However relative humidity of the inlet air of the evaporator strongly affects capacity rather that COP.

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TRNSYS 시뮬레이션을 통한 시스템 에어컨의 구현과 타당성 검증 (Development of the TRNSYS Simulation Modules for System Air-Conditioner and Its' Verification)

  • 기현승;홍인표;박준원;강기남;송두삼
    • 설비공학논문집
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    • 제24권4호
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    • pp.315-322
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    • 2012
  • In these days, importance of HVAC system in office building is steadily growing in terms of thermal comfort and energy savings. As a energy efficient heating and cooling system, system air-conditioner which can be controlled distinctly and has a high COP is more widely adopted nowadays. However, the features and advantages of system air-conditioner were not reported well because system air-conditioner did not describe yet by conventional simulation methods such as TRNSYS, e-Quest, Energyplus, etc. In this study, by using the TRNSYS program which is able to show module implementation and building energy consumption analysis, system air-conditioner module will be proposed and validated through comparison between the simulation results and measurement results.

퍼지 알고리즘을 이용한 시스템 에어컨의 냉매충전량 감지 프로그램 개발 (Program Development for Detecting Charged Refrigerant Amount in System Air-Conditioner using Fuzzy Algorithm)

  • 태상진;최창식;김훈모;조금남;문제명;김종엽;권형진
    • 설비공학논문집
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    • 제18권2호
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    • pp.172-179
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    • 2006
  • This study developed a program for detecting charged refrigerant amount in system air-conditioner. System air-conditioner is an air-conditioning system with multiple indoor units. Due to the complexity of the system, it is more difficult to detect the refrigerant amount charged in the system air-conditioner than in a general single air-conditioner. Experiments were performed for a 6 HP outdoor unit with 3 indoor units in a psychrometric calorimeter. The experimental amount of the charged refrigerant was ranged from $60\%\;to\;140\%\;with\;10\%$ increasement. Fuzzy algorithm was employed for detecting the charged refrigerant amount in the system air-conditioner. The experimental data were used for curve-fitting for the general ranges of indoor and outdoor temperature conditions. Membership function was determined for the whole ranges of experimentally measured data and rule-bases were defined for each charged refrigerant amount. Developed program successfully predicted the measured data within $10\%$ resolution range.

중형공간에서 중앙공조방식과 시스템에어컨 방식에 따른 PMV와 $CO_2$농도, 에너지소비량 비교 (Comparison of the PMV and $CO_2$ Concentration, Energy Consumption Characteristics of Central Air-Conditioning System and System Air-Conditioner with Ventilation System for Large Space)

  • 성상철;노광철;진심원;오명도
    • 대한설비공학회:학술대회논문집
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    • 대한설비공학회 2008년도 동계학술발표대회 논문집
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    • pp.298-303
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    • 2008
  • PMV, $CO_2$ and the energy consumption performance were numerically investigated in a large space with air-conditioning systems of four type. The numerical results showed that thermal comforts in the occupied zone are nearly similar in three systems except 3-way wall type system air-conditioner with ventilation system installed 2.2m height from the bottom. In case of 3-way wall type system air-conditioner the energy consumption for cooling loads was reduced about 25.5% compared to other air-conditioning systems. From the viewpoint of IAQ, it was turned out that system air-conditioner with ventilation system became worse about 20% compared to central air-conditioning systems for cooling load. The PMV, $CO_2$ concentration and energy consumption of all systems for heating loads were similar in a large space considered.

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