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air change
相关语句
  换气
     Emphasises importance of high ventilation effectiveness for ensuring desired indoor air quality, evaluates the air change efficiency and ventilation efficiency of different air distribution systems, discusses the relationship between ventilation efficiency and indoor contaminant concentration, and suggests some approaches to increase the ventilation efficiency.
     指出了通风有效性对改善室内空气品质的重要性 ,比较了不同送风方式的换气与通风效率 ,分析了通风效率与室内污染度的关系 ,最后提出了关于如何提高通风效率的建议。
短句来源
     In order to decrease the difference, we suggest that there should be a rule of less than 0.1n/h air change rat for test room for ISO 3148,3149, and also a rule having insulating panel behind the radiator in the test room for air-cooled booth, so that the heat flux through the wall behind radiator less than the average heat flux of other walls.
     为减小各实验台之间的测试差别,建议ISO3148,3149中应规定闭式小室的换气次数不大于0.1次/时; 风冷闭式小室安装散热器的后墙也应装设隔热板,并使所测散热器对应墙面的热流量不高于其它壁面的平均值。
短句来源
     By means of the effective heat transfer coefficient calculates the thermal performance of an example residential unit in critical heating regions of China, the results show that the envelope structure of existing houses is inadequate to maintain the minimum indoor temperature of 10 ℃ and that to improve the insulation performance of the windows and to lower the air change are the most effective in increasing the indoor temperature.
     采用有效传热系数方法分析了中国供暖临界地区的居住建筑室内热环境,结果表明:现有形式的住宅仅靠围护结构的保温作用和室内余热不能保证10℃的室内温度; 降低换气次数和改善窗的保温性能是提高室温的有效方法。
短句来源
     B numerical model under same room air change rate,to compare bacteria colony deposition onto the ″critical area″,which consisted of three connected areas around the surgical site on patient body,result showed that improving air flow pattern can reduce particle deposition on critical surface,but its effect is not as obvious as yield to that increasing the air change rate in a certain amount.
     B手术室进行了数值模拟以比较在手术关键区(围绕患者手术切口的三个相连区域)的细菌沉降数量。 结果表明改进气流流型可以降低关键区域的微粒沉降量,但效果并不如增加换气次数至某个恰当量那么明显。
短句来源
     Now the problem of indoor air quality is becoming urgent,to which the solutions include to improve fresh air quality,ventilation effectiveness and air change effectiveness.
     室内空气品质问题已日益尖锐化 ,有效的对策主要包括提高入室新风品质、通风效率和换气效率
短句来源
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  空气变化
     Starting from sustainable development of city, this paper analyzes structuring framework of modern ecological city. According to demand of ecological city construction, this paper makes a discussion on vegetation, air change, selection of tree species, etc.
     以城市可持续发展为出发点,分析了现代生态城市的构建框架,按生态城市的建设要求,从城市的植被、空气变化、树种选择等方面进行了探讨。
短句来源
  空气交换
     (3) Under nuclear biochemical(NBC) condition,a minimum of ≥25 m~3·h~(-1) per person of outside fresh air should be introduced into the operators' enclosure,and the air change rate should be ≥20 h~(-1).
     (3)核生化(NBC)状态下,乘员的新风量应≥25 m3.h-1,空气交换率为20 h-1;
短句来源
     The outside air intake and air change rate for carriers should be ≥18 m~3·h~(-1) per person and ≥26 h~(-1) respectively,and air velocity over head for both operator and carrier should be ≥0.1 m·s~(-1).
     与之相对应,载员所需人均新风量应≥18 m3.h-1,空气交换率为≥26 h-1; 乘载员头部风速为≥0.1 m.
短句来源
     (2) Under firing condition,a minimum of ≥100 m~3·h~(-1) per person of outside fresh air should be introduced into the operators' enclosure,and air change rate ≥80 h~(-1).
     s-1。 (2)火炮射击时,以≥100 m3.h-1作为乘员人均新风量,空气交换率为≥80 h-1,头部风速为≥0.5 m.
短句来源
     But for carriers,outside air intake and air change rate should be at least 25 m~3·h~(-1) per person and 36 per hour respectively.
     载员所需最低人均新风量为25 m3.h-1,空气交换率≥36 h-1。
短句来源
     Results The standard of ventilation requirements of crew members in armored vehicles was worked out. In this standard,the following items were stipulated:(1) Under driving condition,the average outside air intake should be supplied at a minimum rate of ≥34 m~3·h~(-1) per person,and the air change rate should be ≥27 per hour for operators.
     结果制定出《装甲车辆乘载员通风需要量限值》,标准规定:(1)装甲车辆行驶时,乘员所需最低人均新风量34 m3.h-1,空气交换率≥27 h-1;
短句来源
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  “air change”译为未确定词的双语例句
     Application of air change ventilation system in hydropower house
     置换通风系统在水电站厂房中的应用
短句来源
     When increasing the air change rate in the underground space,the radon concentration in the air will fall fast.
     在较高的氡浓度状态下,室内氡浓度对通风十分敏感,增大地下空间的通风换气率,会使空气氡浓度大幅度的降低。
短句来源
     Air change flow is one of the sanitarian standards which can evaluate indoor environmental quality,and it is also one of the important parameters that may calculate gas discharge amount per unit time.
     新风量是评价室内微环境空气卫生质量的主要卫生指标之一,也是计算室内某种气体单位时间排放量的重要参数。
短句来源
     Based on the current situation, we analyze how to implement the “Air Change” procedure to improve the service efficiency in the San Bao service in SonyEricsson.
     在此基础上,分析了索尼爱立信公司在三包服务上实行空中交换,提高服务效率的流程改进过程。
短句来源
     Through analyzing the data of the NECP and JONES, the decadal variability of air and sea can be found in the Eastern Equatorial Pacific and Southern Pacific and the occurrence of air change is prior to that of ocean variability.
     本文分析了美国国家环境预报中心和气象研究中心 (NCEP/NCAR) 195 8- 1997年的月平均资料和海表面温度异常资料 (JONES ,1994 ) ,发现南太平洋大气和海洋及赤道东太平洋中存在明显的年代际时间尺度的变化 ,1972年以前 ,副热带海区大气旋度场与海表面温度(SST)的变化同步 ,大气中的变化超前于海洋的变化 ;
短句来源
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  air change
It is found experimentally that when through defects appear in water pipes the concentration and dispersion composition of the aerosols in the room air change.
      
It is found experimentally that when through defects appear in water pipes the concentration and dispersion composition of the aerosols in the room air change.
      
(air change : 36 m3 /hr) in a 36 m3-room (= 14.5 m2 covered with carpet).
      
Finally, the formaldehyde concentrations observed in the chamber under conditions that simulated mobile loadings of wood product, air change rate, temperature, and humidity relate to real wood formaldehyde levels.
      
Double loading of a single wood product did not double the chamber concentration at the low air change rate and sample loading.
      
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Four models of ventilation apparatus with 600 air changes per hour in each cabinet were designed and operated in experiment. The purpose of this study was to determine the efficiency of air exchanges in filter top covered cage ( A &B ) or in shoe box cage ( C &D ) , on the basis of ammonia ( NH3 ) level and excess moisture of the bedding.

通过笼内氨浓度和垫料含水量的测试,判断一般鼠笼和载过滤帽鼠笼的气体交换情况,结果:在24~48h期间,带过滤帽鼠笼内氨浓度由45.64μg升至133.32μg,而笼内换气方式是53.1~16.67μg,垫料含水量增加情况与氨浓度变化相似。我们认为,过滤帽阻碍笼内外气体交换,导致笼内氨浓度和湿度明显升高。而笼内换气方式能改善动物所处的微环境,并减少笼与笼之间的干扰,便于清洗和易于操作是笼内换气工艺流程设计时应加以注意的问题。

The relationship between the natural ventilation and the level of the air pollutant was investigatated in 15 rural dwelling-houses.The average volume of there dwel- ling-houses was 55.26 m.The furniture coefficient was 2.06m.When the door was clossed the air changes per hour(ACH)were 1.11.The required ventilation volume for one to eliminatc CO_2,is 6~9L/s.Mean that HCHO concentration indoor was 4.39μg/m,slightly higher than outdoor.With the door and window sclossed ~(222)Rn concentration was 2.7...

The relationship between the natural ventilation and the level of the air pollutant was investigatated in 15 rural dwelling-houses.The average volume of there dwel- ling-houses was 55.26 m.The furniture coefficient was 2.06m.When the door was clossed the air changes per hour(ACH)were 1.11.The required ventilation volume for one to eliminatc CO_2,is 6~9L/s.Mean that HCHO concentration indoor was 4.39μg/m,slightly higher than outdoor.With the door and window sclossed ~(222)Rn concentration was 2.7 times as high as that when the door was opened.The average wind volocity indoor was less than 0.05m/s during the winter.The average ventilation efficiency was less than 1.The results of the study suggest that clossing the door and windows may lead up to the decrease of air changes which results in a rising of the accumulation of indoor pollutants.

我们对15幢农村居室进行测试,从自然通风角度分析室内通风换气与污染物浓度关系,结果是:这些居室的平均容积55.26m~3、家具系数2.06m~3、关闭门窗时每小时换气次数(ACH)1.11、排出室内 CO_2换气量每人需6~9L/S、调查户 HCHO 平均浓度4.39μg/m~3略高于室外水平、~(222)Rn 的浓度。关门窗为开门的2.7倍、冬季室内风速小于0.05m/s,通风率效应 E<1.因而密闭门窗可导致室内空气阻滞,使污染物逐渐积累达到影响健康的水平.

The paper quotes the recommended air-change rates for different grade turbulent flow clean rooms by《Design Regulation for Glean Room Facilities》OBJ-73-84, makes out the room allowed dust generation volume per-unit space under recommended air-change rates. Taking for the problem that air-change rate calculation and chart-using are complex in real engineering designings, the paper issues simplified formulas for airchange rate calculation.

本文根据《洁净厂房设计规范》GBJ-73-84中不同级别乱流洁净室推荐的换气次数,计算了推荐换气次数下室内允许的单位容积发尘量。针对实际工程设计中换气次数计算和查图比较复杂这一问题,提出了一个简化的换气次数计算公式。

 
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