• 제목/요약/키워드: 공기조화기

검색결과 100건 처리시간 0.043초

공기조화 취출구 소음의 평가요인에 관한 연구 (A Study on the Evaluation Factors for Diffuser Noise of HVAC)

  • 박현구;김항;김선우
    • 한국소음진동공학회논문집
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    • 제16권2호
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    • pp.149-155
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    • 2006
  • There are various types of noise around us such as road traffic noise, aircraft noise and floor impact sound, equipment noise, etc. Researches on the noise criteria and the evaluation method for the diffuser noise of HVAC are insufficient. dB(A) and NC values represented in ASHRAE guide book are applied as a noise criteria for diffuser noise, which have some problems like that the values between dB(A) and NC have deviation even if the sound is same one. Therefore, the evaluation method should be considered and proposed based on the subjective responses. From these reasons, this study aimed to analyze the evaluation factors for the diffuser noise of HVAC reflected on the subjective responses by surveying vocabularies and grouping them with factor analysis.

HVAC 파라미터 모니터링 시스템에 대한 고찰 (Computer Validation 중심으로) (A Study on HVAC Parameter Monitoring System (Regarding Computer Validation))

  • 김종구
    • 대한설비공학회:학술대회논문집
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    • 대한설비공학회 2008년도 하계학술발표대회 논문집
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    • pp.90-95
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    • 2008
  • This article presents practical advice regarding the implementation and management of an impeccable Building Management System. The BMS was introduced to the series of computerized systems including manufacturing, storage, distribution, and quality control. Recently revised GMP regulation is requesting an improvement in drug product quality regulatory system by computer system validation. Quality is critical to guarantee the efficacy and the safety of drugs and is approved in the evaluation process after the audit trail application. HVAC parameter monitoring system will record the identity of operators entering or confirming critical data. Authority to amend entered data should be restricted to nominated persons. Any alteration to an entry of critical data should be authorized in advance and recorded with the reason for the change.

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공기조화 취출구 소음의 평가요인 설정에 관한 연구 (A Study on the Evaluation Factors for Diffuser Noise of HVAC)

  • 박현구;김항;김원식;김선우
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2005년도 추계학술대회논문집
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    • pp.349-354
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    • 2005
  • There are various types of noise around us such as road traffic noise, aircraft noise and floor impact sound, equipment noise etc. Recently researches on the criteria to evaluate the noises have been progressed, however, researches on the noise criteria and evaluation method for the diffuser noise of HVAC are insufficient. dB(A) and NC values represented in ASHRAE guide book are applied as a noise criteria for diffuser noise, which have some problems like that the values between dB(A) and NC have deviation even if the sound is same one. Therefore, the evaluation method should be considered and proposed based on the subjective responses. From these reasons, this study aimed to analyze the evaluation factors for the diffuser noise of HVAC reflected on the subjective responses by surveying vocabularies and grouping them with factor analysis.

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공기조화기내 메쉬삽입 물-공기 직접접촉의 열전달 특성 연구 (Air handling unit utilizing water/air direct contact heat exchanger with mesh)

  • 전용한;문명훈;김종윤;김남진;서태범;김종보
    • 대한설비공학회:학술대회논문집
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    • 대한설비공학회 2008년도 하계학술발표대회 논문집
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    • pp.1161-1166
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    • 2008
  • The objective of this research was to investigate the enhancement of heat transfer by mesh in water/air direct contact air conditioning system. Mesh is inserted as a turbulent promoter in front of the water injection nozzle. The heat transfer characteristics with and without mesh and the effect of the number of inserted mesh and mesh porosity size have been studied experimentally. Inserted mesh improves heat transfer efficiency compared to non-inserted mesh system and heat transfer efficiency increased as the number of mesh is increased. Meanwhile, heat transfer efficiency decreased as the porosity of the mesh is increased. With inserted mesh, inlet and outlet temperature difference of air increased more than 50%. Heat exchange time of water/air to reach the 100% humidity decreased less than 30%. This result shows inserted mesh can enhance the performance of the water/air direct contact air conditioning system.

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공기조화기내 메쉬삽입 물-공기 직접접촉의 열전달 특성 연구 (Air Handling Unit Utilizing Water/Air Direct Contact Heat Exchanger with Mesh)

  • 전용한;김종윤;김남진;서태범;김종보
    • 설비공학논문집
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    • 제20권1호
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    • pp.75-80
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    • 2008
  • The objective of this research was to investigate the enhancement of heat transfer by mesh in water/air direct contact air conditioning system. Mesh is inserted as a turbulent promoter in front of the water injection nozzle. The heat transfer characteristics with and without mesh and the effect of the number of inserted mesh and mesh porosity size have been studied experimentally. Inserted mesh improves heat transfer efficiency compared to non~inserted mesh system and heat transfer efficiency increased as the number of mesh is increased. Meanwhile, heat transfer efficiency decreased as the porosity of the mesh is increased. With inserted mesh, inlet and outlet temperature difference of air increased more than 50%. Heat exchange time of water/air to reach the 100% humidity decreased less than 30%. This result shows inserted mesh can enhance the performance of the water/air direct contact air conditioning system.

영동산 일 라이트를 이용한 공조기의 프리필터 개발 (Development of pre-filter for airconditioner using of illite found in youngdong area)

  • 김진철;구경완;류명환;한위생
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2001년도 하계학술대회 논문집
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    • pp.507-510
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    • 2001
  • 본 논문은 일 라이트의 항균 방취 및 세균 흡착 능력을 공기조화기 및 공기청정기의 프리필터로 함침하여 사용함으로서 필터의 탈취 시험결과는 암모니아, 메틸멀캅탄, 트리메틸아민, 황화수소를 가지고 실험결과 거의 모든 가스를 흡착하였고 필터의 항균시험 결과 두가지의 균주를 사용하였는데 균주 1 - Staphylococcus aureus ATCC 6538과 균주 2 - Escherichia coli ATCC 25922는 균 감소율이 99.9% 이상을 보였다. 따라서 본 논문이 의도하였던 모든 특성을 만족한 결과가 도출되었다.

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파울링 형성 가속장치를 이용한 공기조화기용 열교환기의 공기측 파울링 특성에 대한 실험적 연구 (An Experimental Study of the Air-side Particulate Fouling of Finned-Tube Heat Exchangers of Air Conditioners by using Accelerated Particle-Loading System)

  • 안영철;조재민;이재근;이현욱;안승표;윤덕현;하삼철;강태욱;옥주호
    • 설비공학논문집
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    • 제15권10호
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    • pp.802-808
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    • 2003
  • The air-side particulate fouling of the HVAC heat exchangers degrades the performance of cooling capacity, pressure drop across a heat exchanger, and indoor air quality. The purpose of this study is to investigate the fouling characteristics using accelerated particle loading system. The fouling characteristics are analyzed as functions of a dust concentration, a face velocity and a wet or dry surface condition. The pressure drop increases with increasing test operation and reaches constant asymptotic level. For the saturated condition due to particle loading, the pressure drop across the slitted finned-tube heat exchangers at the face velocity of 1 m/sec increases up to 57% and the cooling capacity decreases about 2%. The cooling capacities are not affected greatly by the presence of the fouling deposits if the thickness of the fouling deposits can not change substantially the flow pattern through the fins.

LonWork fieldbus 기반을 가진 HVAC 공기조화기용 고성능 지능형제어모듈 개발 (A Novel Development of Distributed Intelligent Control Module Based on the LonWorks Fieldbus for Air Handling Units in the Healing, Ventilating and Air Conditioning)

  • 홍원표
    • 조명전기설비학회논문지
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    • 제18권1호
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    • pp.115-121
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    • 2004
  • 본 연구에서는 프랜트 및 빌딩자동제어 분야에서 적용이 확대 되고 있는 LonWorks 필드버스를 이용하여 기존의 공기조화시스템를 제어하고 있는 DDC제어기를 대체할 수 있도록 필드버스에서 사용이 가능한 고성능 저가의 지능형 제어모듈을 개발하였다. 이는 필드버스 기반의 AHU 전용 지능형제어기를 새로운 설계기술로 개발하고 상품화를 실현하였다. 특히 S/W부분에서도 8 bit Neuron chip에 매우 콤팩트하게 내재된 고성능 응용프로그램도 개발하였다. 공조기의 실험시스템을 구축하여 개발된 전용 제어기를 실험한 결과 밸브, 댐퍼제어 및 감시기능이 기존 DDC 제어기보다 우수함을 확인하였다.

수치해석을 이용한 대류열전달의 국내 연구동향

  • 이택식;이재헌;최영기;유재석
    • 기계저널
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    • 제29권4호
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    • pp.394-402
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    • 1989
  • 열전달 분야 중에서도 대류열전달에 관련된 수치해석적 연구가 현재 국제적으로 많은 연구의 대상이 되고 있으므로 이번 기회에 국내에서 수치적 방법을 이용한 대류열전달 분야의 연구동 향을 간략히 기술하고자 한다. 대류열전달 분야를 소분류하는 방법에는 여러 가지가 있겠으나 이번 조사에서는 "자연대류 열전달", "강제대류 열전달" 그리고 "상변화 열전달"의 세 가지로 분 류하였으며 위의 분류에 명확히 속하지 않는 것이라고 유사성을 참고하여 분류하였다. 상기 각 분야에서의 기술 순서는 대략적으로 발표년도 순서를 따랐다. 본 연구동향의 조사에서는 국내 학술 문헌중 "대한기계학회논문집"을 중심으로 하여 이외에 관련된 학술지로서 "공기조화. 냉동 공학", "태양에너지"등에 수록된 논문을 발췌 요약하였다.uot;공기조화. 냉동 공학", "태양에너지"등에 수록된 논문을 발췌 요약하였다.된 논문을 발췌 요약하였다.

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