电子机械工程
電子機械工程
전자궤계공정
ELECTRO-MECHANICAL ENGINEERING
2011年
5期
1-4
,共4页
室外通讯机柜%结露%保温材料%湿度管理%CFD
室外通訊機櫃%結露%保溫材料%濕度管理%CFD
실외통신궤거%결로%보온재료%습도관리%CFD
outdoor telecom cabinet%condensation%insulation material%humidity management%computational fluid dynamics
室外通讯机柜的结露问题严重影响设备的正常运行。某室外机柜因为锈蚀而发生短路现象,实地监测机柜的温湿度,分析结露原因,发现柜内相对湿度较大,环境温度降低时水蒸气易冷凝。考虑柜内存在热扩散现象,采用加保温材料来提高空气温度,降低相对湿度,防止水蒸气凝结。对机柜进行数值模拟和湿度计算,发现柜内温度升高,相对湿度从85.5%下降到80%,基本符合欧洲通讯机柜环境测试标准ETSI EN 300 019-1-3。实际测试也表明该方法能有效降低空气的相对湿度,改善结露问题。
室外通訊機櫃的結露問題嚴重影響設備的正常運行。某室外機櫃因為鏽蝕而髮生短路現象,實地鑑測機櫃的溫濕度,分析結露原因,髮現櫃內相對濕度較大,環境溫度降低時水蒸氣易冷凝。攷慮櫃內存在熱擴散現象,採用加保溫材料來提高空氣溫度,降低相對濕度,防止水蒸氣凝結。對機櫃進行數值模擬和濕度計算,髮現櫃內溫度升高,相對濕度從85.5%下降到80%,基本符閤歐洲通訊機櫃環境測試標準ETSI EN 300 019-1-3。實際測試也錶明該方法能有效降低空氣的相對濕度,改善結露問題。
실외통신궤거적결로문제엄중영향설비적정상운행。모실외궤거인위수식이발생단로현상,실지감측궤거적온습도,분석결로원인,발현거내상대습도교대,배경온도강저시수증기역냉응。고필거내존재열확산현상,채용가보온재료래제고공기온도,강저상대습도,방지수증기응결。대궤거진행수치모의화습도계산,발현거내온도승고,상대습도종85.5%하강도80%,기본부합구주통신궤거배경측시표준ETSI EN 300 019-1-3。실제측시야표명해방법능유효강저공기적상대습도,개선결로문제。
Condensation of telecom cabinet affects the operation of equipment.Corrosion in outdoor cabinet leads to short circuit.To analyze the cause of condensation,temperature and humidity distribution are investigated.Large relative humidity（RH） inside cabinet was observed and it is prone to condensation as ambient temperature drops fast.Considering heat dissipation in cabinet,insulation is used to improve air temperature,reduce relative humidity and prevent condensation.The cabinet temperature is simulated and humidity is calculated.It shows that temperature increases and relative humidity decreases from 85.5% to 80%.The results meet the European standard of telecommunication series ETSI EN 300 019-1-3.In practice,enhancing the insulation of cabinet is also shown to be an effective anti-moisture method for reducing relative humidity.
