• 한국지구과학회지
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• 제33권2호
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• pp.148-161
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• 2012

2010년 8월 13일부터 9월 3일까지 수도권지역에서 집중관측(Predictability and Observation Experiment of Korea-2010, ProbeX-2010)이 수행되었으며, 그 일환으로 동두천, 인천공항, 양평에서 6시간 간격으로 라디오존데 관측이 실행되었다. 관측기간 동안 우리나라의 전형적인 호우 패턴인 스콜선형, 정체전선형, 태풍 전면 수렴형, 열대저압부형, 태풍 직접형 호우가 연속적으로 발생하였다. 8월 15일 03 KST 경에는 스콜선형 구름대가 수도권 지역에서 발달하였다. 따뜻하고 습한 하층 공기 위로 건조한 중층 공기가 유입되어 강한 대류 불안정이 형성되었으며 이로 인해 호우가 발생하였다. 8월 23일부터 26일, 8월 27일부터 29일은 각각 정체전선과 태풍 전면 수렴대의 영향을 받아 강우가 발생하였다. 정체전선형 강우 초기에는 열적 불안정이 우세하게 나타났으나 강우 후기에는 역학적 불안정이 강화되었다. 이 기간 중 특히 강한 강수는 서해상에서 남풍류 하층 제트가 발달한 8월 25일에 발생하였다. 태풍 전면 수렴형 강우기간에는 열적 불안정과 역학적 불안정이 모두 유지되는 특징을 보였다. 이 기간 중 특히 강한 강수는 높은 상당온위(>345 K)를 가진 열대 공기가 대기 중하층에 거쳐 유입되었을 때 발생하였다. 8월 27일과 9월 2일에는 각각 열대저압부와 태풍 곤파스의 영향에 의해 강우가 발생하였다. 이 사례들 동안에는 역학적 불안정이 매우 강하게 발달하였다.

• 설비공학논문집
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• 제12권12호
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• pp.1098-1125
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• 2000

A review on the papers published in the Korean Journal of Air-Conditioning and Refrigerating Engineering in 1998 and 1999 has been done. Focus has been put on current status of research in the aspect of heating, cooling, ventilation, sanitation and building environment. The conclusions are as follows. 1) A review of the recent studies on fluid flow, turbomachinery and pipe-network shows that many experimental investigations are conducted in applications of impingement jets. Researches on turbulent flows, pipe flows, pipe-networks are focused on analyses of practical systems and prediction of system performance. The results of noise reduction in the turbomachinery are also reported. 2) A review of the recent studies on heat transfer analysis and heat exchanger shows that there were many papers on the channel flow with the application to the design of heat exchanger in the heat transfer analysis. Various experimental and numerical papers on heat exchanger were also published, however, there were few papers available for the analysis of whole system including heat exchanger. 3) A review of the recent studies on heat pump system have focused on the multi-type system and the heat pump cycle to utilize treated sewage as the heat source. The defrosting and the frosting behaviors in the fin-tube heat exchanger is experimentally examined by several authors. Several papers on the ice storage cooling system are presented to show the dynamic simulation program and optimal operation conditions. The study on the micro heat pipes for the cooling of high power electronic components is carried out to examine the characteristics of heat and mass transfer processed. In addition to these, new type of separate thermosyphon is studied experimentally. 4) The recent studies on refrigeration/air conditioning system have focused on the system performance and efficiency for new alternative refrigerants. New systems operating with natural refrigerants are drawing lots of attention. In addition to these, evaporation and condensation heat transfer characteristics of traditional and new refrigerants are investigated for plain tubes and also for microfin tubes. Capillary tubes and orifice are main topics of research as expansion devices and studies on thermophysical properties of new refrigerants and refrigerant/oil mixtures are widely carried out. 5) A review of the recent studies on absorption cooling system shows that numerous experimental and analytical studies on the improvement of absorber performance have been presented. Dynamic analysis of compressor have been performed to understand its vibration characteristics. However research works on tow-phase flow and heat transfer, which could be encountered in the refrigeration system and various phase-change heat exchanger, were seemed to be insufficient. 6) A review of recent studies on duct system shows that the methods for circuit analysis, and flow balancing have been presented. Researches on ventilation are focused on the measurement of ventilation efficiency, and variation of ventilation efficiency with ventilation methods by numerous experimental and numerical studies. Furthermore, many studies have been conducted in real building in order to estimate indoor thermal environments. Many research works to get some information for cooling tower design have been performed but are insufficient. 7) A review on the recent studies on architectural thermal environment and building mechanical systems design shows that thermal comfort analysis is sitting environment, thermal performance analysis of Korean traditional building structures., and evaluation of building environmental load have been performed. However research works to improve the performance of mechanical system design and construction technology were seemed to be insufficient.