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The Characteristics of a Bypass Air Conditioning System for Load Variation  

김보철 (한국건설기술연구원 건축연구부)
신현준 (한국건설기술연구원 건축연구부)
김정엽 (한국건설기술연구원 건축연구부)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.14, no.3, 2002 , pp. 240-246 More about this Journal
Abstract
Bypass air conditioning systems are divided into three types; an outdoor air bypass, a mixed air bypass and a return air bypass system. What makes the return air by pass system more effective is that it directs all of moist outdoor air through the cooling coil. The bypass air conditioning system can maintain indoor R.H (Relative Humidity) less than a conventional CAV (Constant Air Volume) air conditioning system by adjusting face and bypass dampers at part load. When a design sensible load (the ratio of sensible load to total sensible load) is 70 percent (at this time, RSHF (Room Sensible Heat Factor) . 0.7), indoor R.H was maintained 59 percent by the return air bypass system, but 65 percent by the conventional CAV air conditioning system (valve control system). The bypass air conditioning system can also improve IAQ (Indoor Air Quality) in many buildings where the number of air change is high.
Keywords
Apparatus dew point; Bypass control; GSHF; ESHF; RSHF; Part load;
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