Analyses of the improvement of subway station thermal environment in northern severe cold regions

2018 ◽  
Vol 143 ◽  
pp. 579-590 ◽  
Author(s):  
Jiangyan Ma ◽  
Xin Zhang ◽  
Angui Li ◽  
Baoshun Deng ◽  
Wenchao Lv ◽  
...  
Keyword(s):  
Thermal Environment ◽  
Subway Station ◽  
Cold Regions

Current Situation and Improving Strategies for Northeast China's Rural Housings

2017 ◽  
Vol 42 (4) ◽  
pp. 70-77
Author(s):  
Teng Shao ◽  
Hong Jin ◽  
Lihua Zhao
Keyword(s):  
Thermal Environment ◽  
Heating System ◽  
Building Energy ◽  
Energy Utilization ◽  
Rural Housing ◽  
Cold Regions ◽  
Housing Design ◽  
Integral Development ◽  
Functional Layout ◽  
Resource Status

According to the survey and measurement on rural housing in the Northeast severe cold regions of China, this paper analyzed the existing situation and problems of current rural housing in terms of integral development, functional layout, envelop structure, interior thermal environment, heating system and energy utilization etc.. Based on the climatic features of severe cold regions, as well as rural financial and technical conditions, living and production mode, residential construction characteristics and existing resource status etc., the feasible approaches of achieving building energy saving has been proposed, thus acting as a guidance for new rural housing design in severe cold regions.

scholarly journals The Effects of Different Space Forms in Residential Areas on Outdoor Thermal Comfort in Severe Cold Regions of China

2019 ◽  
Vol 16 (20) ◽  
pp. 3960 ◽  
Author(s):  
Zheming Liu ◽  
Yumeng Jin ◽  
Hong Jin
Keyword(s):  
Thermal Comfort ◽  
Thermal Environment ◽  
Residential Areas ◽  
The South ◽  
Cold Regions ◽  
Space Forms ◽  
Transition Season ◽  
Outdoor Spaces ◽  
Outdoor Space ◽  
Comfort Condition

In the context of global climate change and accelerated urbanization, the deterioration of the urban living environment has had a serious negative impact on the life of residents. However, studies on the effects of forms and configurations of outdoor spaces in residential areas on the outdoor thermal environment based on the particularity of climate in severe cold regions are very limited. Through field measurements of the thermal environment at the pedestrian level in the outdoor space of residential areas in three seasons (summer, the transition season and winter) in Harbin, China, this study explored the effects of forms and configurations of three typical outdoor spaces (the linear block, the enclosed block, and the square) on the thermal environment and thermal comfort using the Physiologically Equivalent Temperature (PET). The results show that the thermal environment of all outdoor space forms was relatively comfortable in the transition season but was uncomfortable in summer and winter. The full-enclosed block with a lower sky view factor (SVF) had a higher thermal comfort condition in summer and winter. The linear block with higher buildings and wider south–north spacing had a higher thermal comfort condition in summer and winter. When the buildings on the south side were lower and the south–north spacing was wider, the thermal environment of the square was more comfortable in winter.

Test and Analysis on the Thermal Environment of Island Subway Platform in Frosty Area

2013 ◽  
Vol 353-356 ◽  
pp. 3025-3028
Author(s):  
Pei Hong Zhang ◽  
Lei Xin Yu ◽  
Jian Wang
Keyword(s):  
Wind Speed ◽  
Thermal Environment ◽  
Field Measurements ◽  
Maximum Wind Speed ◽  
Subway Station ◽  
Test Results ◽  
Maximum Wind ◽  
Average Temperature ◽  
Speed Up ◽  
Full Height

in order to study the piston wind and its effect on the thermal environment and velocity field in island subway station platform with full-height non-enclosed screen doors, a number of field measurements were taken at the platform of century station of metro line 2 in Shenyang from Oct. 2012 to Mar. 2013. The test results show that the full-height non-enclosed screen doors enhances the heat transfer between the platform and the tunnel, the effect of piston wind increases the average temperature of platform by 0.7°C-1.4°C. Meanwhile, the full-height non-enclosed screen doors prevent the piston wind from entering into the platform effectively. The wind speed of the platform fluctuates between 0.25~0.52m/s when no train enters or leaves the platform, increasing slightly under the effect of the outdoor wind velocity. When one-way train goes into and out of the site, the maximum wind speed reaches up to 2.2m/s at the working area of platform. While, the wind speed of the stair section shows cyclical shocks between 1.2m/s ~ 1.7m/s with the amplitude attenuates gradually.The two-way train caused the the maximum wind speed up to 2m/s with the duration of 220s.

Transient Numerical Simulation for Air Distribution of Air Conditioning and Ventilation in Subway Island-Platform

2011 ◽  
Vol 250-253 ◽  
pp. 3107-3114
Author(s):  
Hong Ming Fan ◽  
Kai Yuan He ◽  
Zhi Fang Yin ◽  
Dan Zhang
Keyword(s):  
Numerical Simulation ◽  
Air Conditioning ◽  
Thermal Environment ◽  
Ventilation System ◽  
Simulation Method ◽  
Subway Station ◽  
Air Distribution ◽  
Wind Effect ◽  
Piston Effect ◽  
Transient Numerical Simulation

The typical subway island-platform of Beijing as research object was present in the article. Taking two-equation turbulence model and giving boundary conditions of piston wind and train heat load change with the time, adopting numerical method simulates air distribution of air-conditioning and ventilation system in subway. The results indicate that piston wind effect has significant impact on the area of platform entrance and staircase entrance while station with safety doors can obstruct piston effect at a certain degree. Simultaneity, the supply- exhaust air system offers relatively uniform temperature and velocity field, which meets requirements of transitory comfort for passengers. It is found that numerical simulation method can simulate and forecast air distribution of air conditioning and ventilating system in subway station. In conclusion, it can provide the reference for optimizing air-conditioning and ventilation system, improving thermal environment designing of subway station.

Field Survey on Occupant Thermal Comfort of Cold Regions in Transition Season

2013 ◽  
Vol 805-806 ◽  
pp. 1620-1624 ◽  
Author(s):  
Wan Ying Qu
Keyword(s):  
Thermal Comfort ◽  
Air Temperature ◽  
Indoor Air ◽  
Field Survey ◽  
Thermal Environment ◽  
Thermal Sensation ◽  
Residential Buildings ◽  
Cold Regions ◽  
Indoor Thermal Environment ◽  
Transition Season

A thermal comfort field study was investigated in residential buildings of cold regions in transition season during which the indoor thermal environment conditions are measured, the thermal sensation value of the occupants is questioned and recorded. A seven-point thermal sensation scale was used to evaluate the thermal sensation. The statistical method was used to analyze the data and the conclusions are as follows in transition season: clothing increase in 0.1clo when the indoor air temperature is lowered by 1°C; and clothing will be a corresponding increase in 0.06clo when the outdoor air temperature is lowered by 1°C; clothing also varies with gender, age, weight and thermal history and other related; the measured thermal neutral temperature is 21.3°C; and the minimum accepted temperature is 11.4 °C in transition season in cold regions. Most people choose to change clothes, switch and other passive measures, and occasionally take active measures of heater, electric fans and others.

scholarly journals Winter Thermal Environment and Thermal Performance of Rural Elderly Housing in Severe Cold Regions of China

2020 ◽  
Vol 12 (11) ◽  
pp. 4543
Author(s):  
Huibo Zhang ◽  
Ya Chen ◽  
Hiroshi Yoshino ◽  
Jingchao Xie ◽  
Zhendong Mao ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Coefficient ◽  
Transfer Coefficient ◽  
Thermal Performance ◽  
Thermal Environment ◽  
The Elderly ◽  
Living Room ◽  
Cold Regions ◽  
Indoor Thermal Environment ◽  
The Heat Transfer Coefficient

Understanding the thermal performance of the residential envelope is important for optimizing the indoor thermal environment. In this study, the indoor thermal environment and thermal performance of rural residences housing the elderly was determined through field measurements in Qiqihar in 2017 and 2019. The results revealed that the living room temperatures in more than 50% of homes were below the thermal neutral temperature for the elderly (17.32 °C). Moreover, the indoor thermal environment changed significantly during the day, with the predicted mean vote during the day fluctuating from 2 to 4 units. The air change rate of living rooms in 2017 and 2019 was 0.20–2.20 h−1 and 0.15–1.74 h−1, respectively. Residential ventilation times detected by an air-tightness detector ranged from 0.40–1.49 h−1. Furthermore, infrared thermography (IRT) detected air leakage in the windows of the all houses in this study, as well as thermal bridges and condensation on the exterior walls of several houses. The heat transfer coefficient of the exterior walls of all houses detected by IRT was 0.25–0.74 W/(m2·K), and a significant positive correlation was observed between the heat transfer coefficient of the south wall and the window-to-wall ratio. Finally, the heat transfer coefficient of the external walls exhibited a negative but not significant correlation with indoor temperature. This study provides detailed data and guidance for improving the indoor environment of rural houses in severe cold regions.

Simulation Analysis on Sun-Shading Design Case of Buildings in Cold Regions

2014 ◽  
Vol 638-640 ◽  
pp. 1656-1659 ◽  
Author(s):  
Yan Qiu Cui ◽  
Nan Sun ◽  
Yun Long Peng ◽  
Yang Wang
Keyword(s):  
Energy Consumption ◽  
Simulation Analysis ◽  
Thermal Environment ◽  
Design Method ◽  
Simulation Software ◽  
Comfort Level ◽  
The Sun ◽  
Cold Regions ◽  
Air Conditioners ◽  
Before And After

The sun-shading design was carried out based on a comprehensive building in a cold region. The reasonable building sun-shading design method in combination with the regional and facade characteristics in the cold regions is discussed, meanwhile, the unit-area refrigeration power consumption of the room and the annual building energy consumption before and after sun-shading setting are analyzed with simulation software. It is proposed that in the cold regions, designing sun-shading reasonably can reduce air conditioners energy consumption in summer, improve the indoor thermal environment and increase the indoor comfort level. This research can provides a technical reference to promote the sun-shading and building integration design and application in the cold regions.

Sign in / Sign up

Export Citation Format

Share Document