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《Planning》2015,(16)
<正>0引言自2013年全国性的雾霾天气后,雾霾问题引起极大关注。本文研究的便携式车载空气净化器主要针对要求洁净空气应对PM2.5的人群。该装置实用性强、可随车携带、直流蓄电池供电。选用51系列单片机和低功耗、灵敏度高的气味传感器和灰尘传感器组成空气污染监测控制系统。当任一空气污染度超标时,可进行警报提示、液晶显示来提醒人们启动微型轴流式引风机,负离子空气净化部分提供洁净的空 相似文献
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《建筑热能通风空调》2017,(2)
云山隧道为特长分离式公路隧道,现采用"竖(斜)井送排式+射流风机"组合式纵向通风方案。随着隧道内车流量的增加,隧道内空气的污染程度逐渐加剧。提出了采用射流式ESP空气净化系统的技术整改方案,可有效改善隧道内的空气污染状况。 相似文献
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《Planning》2017,(3)
<正>伴随着人们健康意识的提升及对自由呼吸需求的高涨,空气净化产品正悄然流行。"从呼吸开始呵护"是素净环保科技秉持的研发理念,关注室外空气污染的同时更多地关心家居室内的空气污染,加倍呵护每一次呼吸的安全、健康。在空气净化器市场,流行着"看天吃饭"的说法。雾霾天气一报道,空气净化器便与之配套销售,引得销量暴增,但PM2.5浓度稍降销量也跟着降。尽管空气净化器甚至新风系统等 相似文献
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本文在介绍湿式空气-空气能量回收装置基本原理及物理模型的基础上,对湿式空气-空气能量回收过程进行了数学模型建立以及模拟结果分析,结果表明,在湿式空气-空气能量回收装置工作过程中,新风风速、排风风速、换热芯体的板间距、板高及板宽等因素都会对装置的换热效果产生不同程度的影响,这对湿式空气-空气能量回收装置的设计及优化具有一定的参考价值. 相似文献
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变风量空调系统的新风问题 总被引:3,自引:2,他引:1
以某写字楼为例,分析了变风量系统中不同分区形式对各朝向房间的人均新风量分配的影响,认为新风量分配不均的情况主要出现在冬季和过渡季,提出满足所有朝向房间人员健康要求同时能实现过渡季利用新风节能的新风量设计标准;建议在建筑设计中增加新风竖井面积,在空调外区适当增加最小新风量的取值。 相似文献
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Long Xu Fanghua Zhu Fusheng Zha Qiong Wang Bo Kang Chengbin Yang Wei Zhang Zhenghong Liu 《Soils and Foundations》2021,61(2):444-452
Determination of air pressure and assessment of air losses in clayey soil are of great importance to implementation of compressed air tunneling. In the present work, a series of air flow tests were performed to provide a more reasonable method based on flow characteristics of snap-off pressure and the dissolution/diffusion. Results showed that, the nonlinear air flow behavior and gas breakthrough were presented with the increase in air pressure. After that, the excessive pressure decreased continuously to reach an equilibrium termed as the snap-off. For the tested clayey soil, snap-off pressures around 250 kPa could be adopted as the air pressure, which was significantly lower than the gas breakthrough pressures. Diffusion coefficient of 1.5 × 10-11 m2/s could be determined in the followed dissolution/diffusion stage, which bring 3 orders of decreasing magnitude in air losses compared to the capillary flow occurred after gas breakthrough. As a conclusion, the adoption of snap-off pressure in compressed air tunneling could effectively prevent the continuous air/water flow in clayey soil and create a more human-friendly environment. Additionally, less air losses could be presented compared to that using gas breakthrough pressure, indicating tremendous energy savings in field implementation. 相似文献
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Influence of air supply parameters on indoor air diffusion 总被引:6,自引:0,他引:6
This paper presents the field distributions of air velocity, temperature, contaminant concentration, and thermal comfort in an office with displacement ventilation for different air supply parameters such as the effective area, shape, and dimension of the diffuser and the turbulence intensity, flow rate, and temperature of the air supplied. The research is conducted numerically by using an airflow computer program based on a low-Reynolds-number k-ε model of turbulence. It can be concluded that the effective area, shape, and dimension of the diffuser and the turbulence intensity of the air supplied have little effect on the room air diffusion except at floor level. The influence of the flow rate and temperature of the air supplied is very significant on the air diffusion as well as on the thermal comfort and indoor air quality. 相似文献
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