Contributions to Building Smoke, Airflow and Thermal Management

在建筑物中，良好控制的气流将具有适当热条件的空气输送到占用空间，并去除污染物，以实现安全，健康和舒适的建筑环境。因此，了解气流、热传递和污染物输运的组合过程是至关重要的。在上一次的发现资助中，申请人发展了他在建筑气流和热管理方面的研究利基，重点关注以下两个主题：a）。高层建筑烟气管理与消防安全。高层建筑内烟气蔓延是一种典型的热气流现象，火灾引起的热浮力可驱使烟气通过竖向和水平空间迅速向远离火源的方向扩散。高层建筑火灾往往是灾难性的，因此了解烟气运动过程，设计可靠的高层建筑防排烟系统具有重要意义。B）。建筑热气流管理和能源效率。一个管理良好的建筑气流和热系统，例如通过自然/混合通风（NV/HV）与热能储存相结合，被认为是实现能源效率目标的有效措施。长时间的自然冷却使NV/HV非常适合加拿大的气候。NV/HV和建筑热质量的设计和运行代表了另一个典型的热气流问题，需要对现象有基本的了解，以及更好的方法和工具来进行优化设计和运行。 * 对于本次发现补助金更新，拟议的研究包括三个主要任务1）。理论研究发展了瞬态标度法; 2）.数值研究进一步发展和验证了多区域热气流求解器; 3）.应用研究评估和优化设计和操作。本研究将提供一种新的通用定标方法，用于建筑热气流的定标实验，以验证建筑防排烟系统以及与建筑热质量相结合的自然/混合通风系统的设计和运行; 2）一种新的公共领域多区域气流求解器，具有为设计人员建模建筑物传热和污染物传输的能力，3）与社会各界分享一系列基于小尺度实验和全尺度数值模拟的高层建筑热气流研究的新的实际应用和相关经验;（4）建筑防火和节能的相关标准和规范，特别是高层建筑。在NSERC发现补助金的持续支持下，申请人将努力为他的研究利基领域做出贡献，并在各自领域发挥加拿大的主导作用。

In buildings, a well-controlled airflow delivers air with appropriate thermal conditions to an occupied space, and removes pollutants for achieving a safe, healthy, and comfortable built environment. It is therefore essential to understand the combined process of airflow, heat transfer and pollutant transport. In the previous discovery grant, the applicant developed his research niche in building airflow and thermal management focusing on the following two topics: a). High-rise building smoke management and fire safety. The smoke spread in high-rise buildings is a typical thermal airflow phenomenon, where the fire-induced thermal buoyancy may drive the smoke to spread far away from a fire source quickly via vertical and horizontal spaces. High-rise building fires are often disastrous and it is therefore of great importance to understand smoke movement process, and design reliable smoke control systems for high-rise buildings. b). Building thermal airflow management and energy efficiency. A well-managed building airflow and thermal system, e.g. through natural/hybrid ventilation (NV/HV) combined with thermal energy storage, is considered an effective measure for achieving energy efficiency goals. Long hours of natural free cooling make NV/HV well-suited for Canadian climates. The design and operation of NV/HV and building thermal mass represent another typical thermal airflow problem requiring fundamental understanding of the phenomena, and better methods and tools for the optimal design and operation. ******For this discovery grant renewal, the proposed research includes three major tasks 1). Theoretical study develop transient scaling method; 2). Numerical study further develop and verify multizone thermal airflow solver; 3). Application study evaluate and optimize designs and operations. Once completed, this research will contribute 1) a new general scaling method for conducting scaled experiments of building thermal airflow for the verification of the designs and operations of building smoke control systems, and natural/hybrid ventilation systems combined with building thermal mass; 2) a new public domain multizone airflow solver with the capabilities of modeling both building heat transfer and pollutant transport for designers, consultants and researchers to meet their increasing needs for faster and more accurate simulations; 3) a series of new real-world applications and the associated experiences to be shared with the community on high-rise building thermal airflow research based on the sub-scale experiments and full-scale numerical simulations; 4) the associated standards and codes for building fire safety and energy efficiency, especially for high-rise buildings. With the continual support from the NSERC discovery grant, the applicant will strive for contributing to his research niche areas, and the leading role of Canada in the respective field.