Study on Simulation and Design of Natural Ventilation for Patio Space of Multi Corridor Inpatient Building in Humid and Hot Areas

doi:10.12141/j.issn.1000-565X.220361

Abstract

Abstract:

Due to the special climate in the humid and hot areas of China, the ventilation of hospitals through air-conditioning system leads to huge energy consumption. Most public spaces in the inpatient department of a hospital can and should be naturally ventilated to meet the thermal comfort needs of users, improve indoor air quality, and effectively save energy and reduce consumption, given proper categorization and layout. Patio is a common climate adaptive space for buildings in humid and hot areas. The article took Guangzhou, a representative city in the hot and humid region of China (23.1°N, 113.3°E), as the research location and the corridor-type inpatient building as the research object. Through the CFD simulation experiment of designing a hospital inpatient building model and analyzing the suitable periods for natural ventilation in the hot and humid region throughout the year, the study explored the influence of design elements of courtyard space on the natural ventilation performance of the public space in the nursing unit of the multi-corridor inpatient building. The results show that compared with the building without patio, the multi corridor inpatient building with the patio space can effectively improve the natural ventilation performance of the nursing unit public space of the multi corridor inpatient building; By setting a reasonable plan form, position, and height for the courtyard, the public space of each nursing unit on all levels of the multi-corridor inpatient building can achieve natural ventilation that meets human comfort. By setting the position of the air inlet on the ground floor of the inpatient building reasonably, the potential for natural ventilation throughout the year can be increased. For example, in the Guangzhou area, besides the south-facing direction, there is a higher frequency of natural wind in the southeast, northeast, and north directions. Therefore, in addition to the south-facing direction on the ground floor of the building, it is also appropriate to set some air inlets in the southeast, northeast, and north directions to increase the potential for natural ventilation throughout the year.

Key words: humid and hot area, multi-corridor inpatient building, patio space, CFD simulation, natural ventilation

CLC Number:

TU246.1

ZHANG Wenyu, ZHANG Chunyang, WANG Yicheng. Study on Simulation and Design of Natural Ventilation for Patio Space of Multi Corridor Inpatient Building in Humid and Hot Areas[J]. Journal of South China University of Technology(Natural Science Edition), 2023, 51(4): 61-70.

Figures/Tables 9

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计算对象	厚度/m	密度/ （kg·m^-³）	比热容/ （kJ·kg^-1·K^-1）	导热系数/ （W·m^-1·K^-1）
墙体	0.30	2 000	0.92	0.58
玻璃	0.01	2 500	0.84	1.00
大地	10.00	2 000	1.01	1.16

风速/（m·s^-1）	等效温度降低/℃	对舒适度的影响
0.05	0.0	无风，有点不舒服
0.20	1.1	几乎感受不到，但很舒服
0.25	1.3	空间的设计风速
0.40	1.9	感受明显且舒适
0.80	2.8	非常明显，在温暖且活动频繁的区域可以接受
1.00	3.3	空调风速上限，干热气候区的自然通风良好风速
2.00	3.9	热湿气候区的自然通风良好风速
4.50	5.0	室外环境的微风

位置	室外风压云图和各层风速云图
位置	工况A₁，无天井	工况A₂，天井8.4 m×6.6 m	工况A₃，天井16.8 m×3.3 m	工况A₄，天井2×4.2 m×6.6 m
室外
1F
2F
3F
4F
5F
6F
7F
8F
9F
10F

位置	室外风压云图和各层风速云图
位置	工况B₁，9层（37.8 m）	工况B₂，12层（50.4 m）	工况B₃，15层（63 m）
室外

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