共查询到13条相似文献,搜索用时 31 毫秒
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针对寒冷地区建筑物的采暖方式,介绍一种新型的区域供暖方式--地温水源热泵(地温中央空调)供暖系统,为寻找新型供暖方式提出了环保安全、绿色节参采暖制冷新理念。 相似文献
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大气污染物最大落地浓度计算方法的比较 总被引:1,自引:0,他引:1
大气环境影响评价工作中,采用有风点源扩散模式定量预测大气污染物的最大落地浓度,通常有轴线法、常数法和非常数法这三种计算方法。本文通过实例对上述三种计算方法进行比较分析,明确了各自的适用范围,其中以轴线法的应用最为全面。 相似文献
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安装性维修性是产品可靠性的重要组成部分,也是家用空调产品的重要质量特性之一,当前行业内对安装性维修性没有完整的设计、改进、试验及评价。本文通过从市场现状调研为切入点,剖析了空调安装性维修性痛点问题,而后提出了提高家用空调安装性维修性在全生命周期的中开展思路,并制定了安装性维修性的试验及评价,以此提高产品的可靠性。 相似文献
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不同气温条件下室内甲醛污染特性的探讨 总被引:5,自引:0,他引:5
用酚试剂分光光度法(GB/F18204.26—2000)对装修后室内空气中的甲醛进行测定。通过一年多的实测表明:气温在13.0℃-24.0℃范围内,测试结果的超标率为27.8%,测试结果均值为0.077mg/m^3,气温在25.0℃-30.0℃范围内,测试结果的超标率为78.1%,测试结果均值为0.270mg/m^3,两个温度段超标率相差2.8倍多,测试结果均值相差3.5倍多。室内空气中甲醛浓度与室内温度呈线性关系,表明气温对室内空气中甲醛的释放量有明显的影响。 相似文献
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本研究在明确地空导弹武器装备寿命剖面、任务剖面的基础上,利用已经收集到的19发导弹的冲击、振动遥测数据和6发导弹的弹上温度遥测数据以及已经掌握的大量地面温度、电应力数据,进行数据分析与归纳,生成地空导弹环境剖面,并根据我国现有试验条件,将其转化为可靠性试验剖面。 相似文献
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针对气候实验室飞机发动机低温起动试验时,室外超大流量高湿度空气经过低温换热器出现的换热器表面积大量结霜现象进行研究,提出了一种能够有效抑制换热器结霜的换热器组布置方案,从而保证发动机开车试验连续进行,不因换热器大量结冰引起的换热效率快速降低而导致试验中止。 相似文献
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Michael J. Paul Rory Coffey Jen Stamp Thomas Johnson 《Journal of the American Water Resources Association》2019,55(4):824-843
Anticipated future increases in air temperature and regionally variable changes in precipitation will have direct and cascading effects on United States (U.S.) water quality. In this paper, and a companion paper by Coffey et al., we review technical literature addressing the responses of different water quality attributes to historical and potential future changes in air temperature and precipitation. The goal is to document how different attributes of water quality are sensitive to these drivers, to characterize future risk to inform management responses, and to identify research needs to fill gaps in our understanding. Here we focus on potential changes in streamflow, water temperature, and salt water intrusion (SWI). Projected changes in the volume and timing of streamflow vary regionally, with general increases in northern and eastern regions of the U.S., and decreases in the southern Plains, interior Southwest, and parts of the Southeast. Water temperatures have increased throughout the U.S. and are expected to continue to increase in the future, with the greatest changes in locations where high summer air temperatures occur together with low streamflow volumes. In coastal areas, especially the mid‐Atlantic and Gulf coasts, SWI to rivers and aquifers could be exacerbated by sea level rise, storm surges, and altered freshwater runoff. Management responses for reducing risks to water quality should consider strategies and practices robust to a range of potential future conditions. 相似文献