• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Critical evaluation by field studies on the performance of ventilation systems in enclosed car park in Hong Kong.
【24h】

Critical evaluation by field studies on the performance of ventilation systems in enclosed car park in Hong Kong.

机译：通过实地研究对香港封闭式停车场的通风系统性能进行了严格评估。

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

This thesis critically reviews the design guidelines for ventilation systems installed in underground car parks. The design approaches, practical assumptions and final outcomes are reviewed and examined. Ventilation engineers in Hong Kong have long been following design codes from overseas, such as those of CIBSE and ASHRAE, and these approaches continue to be in use.; A comprehensive field survey was carried out in 103 underground car parks in Hong Kong. The scope of survey included the systematic measurement of carbon monoxide (CO) levels, thermal comfort and activity levels. It also gathered information on the physical configuration and capacity of car parks workers' conditions and details of ventilation systems. The health guidelines for both car park employees and car park users are discussed. The introduction of an exposure index is used for assessing protection for vulnerable groups within the general population of users.; A methodology for assessment of ventilation system performance was developed. This focuses on the degree of mixing, air quality index in occupied areas, time constant, pollutant load and turnover time of the key pollutant. The use of a 2-level ventilation strategy was shown to provide an effective approach to energy saving, whilst maintaining the appropriate indoor air quality. A sensitivity analysis was carried out to demonstrate different percentages of energy saved under various scenarios. Multi-cell numerical modelling is recommended for analysis of air flow. Future development of this modelling approach is suggested.; The thesis provides a procedure to aid the design of underground car parks used for different purposes. Nomographs are produced to provide probable emissions strength at different usage rate. Typical profiles of residential buildings, commercial buildings and shopping complex are given. Designers can derive the required ventilation rate through a standard procedure once they have determined the key design parameters. (Abstract shortened by UMI.)
机译：本文对地下停车场通风系统的设计指南进行了严格的审查。对设计方法，实际假设和最终结果进行了审查和检查。长期以来，香港的通风工程师一直遵循来自国外的设计规范，例如CIBSE和ASHRAE的设计规范，并且这些方法仍在继续使用。在香港的103个地下停车场进行了全面的实地调查。调查范围包括一氧化碳（CO）水平，热舒适度和活动水平的系统测量。它还收集了有关停车场工人身体状况和容量的信息以及通风系统的详细信息。讨论了停车场员工和停车场使用者的健康准则。引入暴露指数用于评估对一般用户群体中弱势群体的保护。开发了一种评估通风系统性能的方法。它着重于混合程度，占用区域的空气质量指数，时间常数，污染物负荷和关键污染物的周转时间。事实证明，采用2级通风策略可提供一种有效的节能方法，同时保持适当的室内空气质量。进行了敏感性分析，以证明在各种情况下节省的能源百分比不同。建议使用多单元数值模型来分析气流。建议该建模方法的未来发展。本文提供了一个程序，可以帮助设计用于不同目的的地下停车场。生产的行车记录仪可以在不同的使用率下提供可能的排放强度。给出了住宅建筑，商业建筑和购物中心的典型概况。一旦确定了关键设计参数，设计人员便可以通过标准程序得出所需的通风率。 （摘要由UMI缩短。）

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