| 摘要: |
| 自然采光对提升建筑室内光舒适、
降低建筑能耗有重要作用。设有夹层的开放
办公空间灵活性强、面积利用率高，空间自然
采光状况较为复杂。为研究夹层空间形态对
室内自然采光性能的影响，本文以全年有效
天然采光照度（UDI 100-2000 ）和全天然采光百
分比（DA450）为自然采光性能评价指标，
基于grasshopper参数化平台，应用Radiance
和Daysim展开自然采光性能参数化模拟实
验，分析夹层布局位置、夹层面积占比、夹层退窗比例等设计参量对室内自然采光性能的影响，为自然采光性能导向下的开放办公建筑夹
层空间设计与改造提供理论和技术支持。实验结果表明：不同的夹层位置对夹层上下空间自然
采光性能影响差异较大，南侧夹层布置方式更有利于提高室内UDI 100-2000 水平，东西侧夹层布置
方式下的DA450相对更高；夹层面积的提高会对室内自然采光性能产生不利影响，而夹层面积
占比为50%时，夹层的UDI 100-2000 水平最高；适当提高夹层退离窗的距离有利于改善夹层空间的
UDI 100-2000 水平，夹层退窗比例达到10%~20%时为相对最优。 |
| 关键词: 自然采光 开放办公建筑 夹层空间 寒地建筑 |
| DOI：10.13791/j.cnki.hsfwest.20210504 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目（51708149）；中国
博士后科学基金资助项目（2017M621276）；中
央高校基本科研业务费专项资金资助项目（HIT.
NSRIF. 201838） |
|
| Parametric Daylight Performance Simulation Research of Mezzanine Space in OfficeBuildings in Severe Cold Regions |
|
SUN Cheng,ZI Ying,HAN Yunsong
|
| Abstract: |
| Daylight plays a significant role in improving the indoor environment and reducing
energy consumption. Open office building with mezzanine space has the characteristics of high
flexibility and high space utilization, but the mezzanine will probably add more complexity to
the indoor daylight performance. In this paper, in order to analyze some factors that affect the
daylight performance of open office buildings with mezzanine and provides some suggestions for
prospective in daylight performance-oriented design of mezzanine space in open office buildings.
In this paper, firstly, Useful Daylight Illuminance (UDI 100-2000 ) and Daylight Autonomy
(DA 450 ) are adopted as the dynamic daylight metrics, these two metrics take oration, use time
and climate conditions into consideration, they are more suitable for evaluating annual daylight
performance compared to daylight factor (DF).
A 3D model of an open office room with a ratio of glazing to the floor area of 1/5 was
established in this research. Based on a computer way, a Parametric Daylight Performance
Simulation model was built based on the grasshopper platform, contains geometric parameter
module of the office room, mezzanine space design module, Material optical parameter module,
simulation and visualization module and data output module. The analysis plane was 0.75 meters
above the floor and analysis grid was set to be 1.0*1.0 meter, generic materials with typical
surface reflectance were assumed in this research according to china’s standard for daylighting
design of buildings. Some simulations were carried on using Radiance and Daysim to assess
daylight performance in office buildings. This study utilized the fast and accurate simulation
parameters to calculate daylight metrics.
Aiming to find the relationship between the daylight performance and mezzanine space, a
series of versions of mezzanine space was set with changing the site of the mezzanine, the area ratio of the mezzanine to the room and ratio of the backward distance of the mezzanine to the depth. A total of 42 simulations were carried out for
further analysis.
According to the simulation results, in the aspect of the site of the mezzanine, indoor daylight performance turns to be different for the room
with different site of the mezzanine. For space under the mezzanine, the DA 450 value peaks with northern site of mezzanine, which is 20% higher
than that with southern mezzanine. The DA 450 value with western mezzanine is similar to that with eastern mezzanine. However, the DA 450 on the
mezzanine turns to be opposite with the daylight conditions under the mezzanine. The entire indoor DA 450 does not present a significant difference
between different sites of mezzanine. The UDI 100-2000 conditions turn to be consistent in the room, the room with southern mezzanine presents more
optimal UDI 100-2000 than others. The UDI 100-2000 value of the room with western mezzanine turns to be similar to that of eastern one as well.
The indoor entire daylight performance reduces with the increase of the area of the mezzanine. For space under the mezzanine, the DA 450 value
and UDI 100-2000 value decrease with the increase of the area of the mezzanine. for space on the mezzanine, the daylight performance conditions turn
to be variable. The DA 450 value of southern mezzanine increases with the increase of the area of the mezzanine. However, the UDI 100-2000 value of
southern mezzanine presents a rise–fall-rise tendency with a peak value of 65% at the area ratio of the mezzanine to the room of 50%. The UDI 100-2000
value of northern mezzanine presents a rising tendency and changes into stable after the area ratio of the mezzanine to the room reach 60%. It seems
that altering the area ratio of the mezzanine has little effect on the daylight performance of room with western and eastern mezzanine, owing to no
changes in the depth direction.
For southern sited office room, with the increase of the ratio of the backward distance to the depth, the DA 450 value of the space on and under
the mezzanine enhances and decreases respectively. The entire indoor DA 450 represents little changes. The UDI 100-2000 value of the space under the
mezzanine decreases and changes into stable, however, the UDI 100-2000 value of the space on the mezzanine turns to be a rise-fall trend, peaking at the
ratio of the backward distance to the depth of 20% for the room with not more than 50% area ratio of the mezzanine to the room and at that of 10%
for the room with beyond 50% area ratio of the mezzanine to the room. |
| Key words: Daylight Open Office Building Mezzanine Space Buildings in Severe Cold Regions |
