• Title/Summary/Keyword: CAV duct system

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Balancing air flow at terminal in CAV duct system with DPM method (정풍량방식 덕트에서 이중압력측정방법을 이용한 취출구 풍량조정)

  • 이대우;박명식;박영우
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.10 no.1
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    • pp.66-78
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    • 1998
  • Adequate ventilation with the proper amount of air to the right place is important factor to achieve a good Indoor air climate. Thus it is of prime importance that the ventilation system is working properly. This requires reliable pressure loss calculation to balance the air flow through duct systems. So a computer program for balancing CAV duct system is developed In this study. The results of CAV duct system is compared with the "Balans" code developed by Larsen from Norway. To obtain the pressure drop characteristics of damper at duct terminal, some experiments are performed using DPM(Dual Pressure Measurement) system. To adjust the resistance of damper, present study suggests that some special diffusers should be designed and damper producers should give the data of air flow vs. pressure drop to the customs when they manufacture the damper. One of the results concludes that the working time can be reduced from several minutes to several seconds per damper in the present experimental site, if the DPM system and the air volume adjusting process are used.

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A Study on the Transition & Expectation through Survey for Existing Building and Engineer's Opinion (기존 사무소 건물 및 설비전문가 조사를 통한 설비시스템의 변화와 전망에 대한 연구)

  • Lee, Gwan-Ho;Kim, Nam-Gyu;Park, Jin-Chul;Rhee, Eon-Ku
    • Journal of the Korean Solar Energy Society
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    • v.25 no.2
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    • pp.63-69
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    • 2005
  • This study is the survey of a transition procedure of building services systems(heat source, HVAC, water supply) through the survey of existing office buildings, building design documents. The preference & major consideration of system selection is the engineer's opinions. The results of this survey can be used in selection of building services system design. In this survey, "Hot & cold water generator system" and "single duct CAV+FCU system", "Elevated water tank system" are selected. The most important consideration in system selection is the energy saving in heat source system, and comfort in HVAC system, and water pressure in water supply system. They prefer "steam boiler+absorption chiller system" for heat source system, "steam boiler+ice thermal storage system", "hot & cold water generator system", "district heating+absorption chiller system" : "single duct CAV+FCU system" and "single duct VAV+convector system" for HVAC system: and "booster pump system" for water supply system.