...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Building and Environment >Analytical procedures for estimating airflow rates in ventilated, screened wall systems (VSWS)
【24h】

Analytical procedures for estimating airflow rates in ventilated, screened wall systems (VSWS)

机译：估计通风的屏蔽墙系统（VSWS）中的气流速率的分析程序

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The wetting, storage and drying of moisture is a serious concern in the overall performance of exterior wall systems. Prediction of moisture transport and moisture removal within wall enclosures plays a key role in the design of exterior wall systems. The convective drying potential in ventilated and screened wall systems (VSWS) is directly proportional to the available ventilation flow rate of the air through the vents in the walls. The main goal of this study was to determine the most appropriate analytical equations for predicting ventilation flow rates within VSWS and to provide a solid foundation for estimating convective drying potential. The equations currently available in the ASHRAE literature are primarily intended for mechanical system applications and are not well suited for estimates of convective drying potential in wall systems, mainly due to the extremely low velocities and the unique geometry of VSWS when compared to mechanical systems. Other literature sources were also reviewed for the evaluation of pressure losses in systems with low airflow rates. The pressure losses due to friction at the walls of the ventilated chamber were beyond the scope of this paper. Under most circumstances, the major contribution to pressure losses in VSWS occurs at the inlet and outlet vent openings. A list of the empirical/analytical equations recommended for use in evaluating natural ventilation flow characteristics within VSWS is also provided. The recommended equations provide a solid theoretical background for validation against the laboratory and field results obtained in the ASHRAE Research Project RP-1091.
机译：湿气的润湿，储存和干燥是外墙系统整体性能的一个严重问题。在外墙系统的设计中，对墙体内部的水分输送和水分去除的预测起着关键作用。通风和隔墙系统（VSWS）中的对流干燥势与通过墙壁通风口的空气的可用通风流量成正比。这项研究的主要目的是确定最合适的分析方程式，以预测VSWS内的通风流量，并为估算对流干燥潜力提供坚实的基础。目前，ASHRAE文献中提供的方程式主要用于机械系统应用，不适用于墙体系统中对流干燥潜力的估算，这主要是因为与机械系统相比，VSWS的速度极低且几何形状独特。还审查了其他文献资料，以评估低气流速率系统中的压力损失。由于通风室壁上的摩擦而造成的压力损失超出了本文的范围。在大多数情况下，VSWS中压力损失的主要贡献发生在入口和出口的通风口。还提供了推荐用于评估VSWS内自然通风流动特性的经验/分析方程式列表。推荐的方程式为根据ASHRAE研究项目RP-1091获得的实验室和现场结果进行验证提供了扎实的理论背景。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号