The Application of BIM in Updating the Thermal Environment Design of Traditional Residences in Mountain Region - A Case of Chongqing

2013 ◽  
Vol 779-780 ◽  
pp. 1324-1327
Author(s):  
Jing Yang Wang ◽  
Xin Sun ◽  
Xu Dong Zeng
Keyword(s):  
Quantitative Analysis ◽  
Wind Speed ◽  
Ambient Temperature ◽  
Simulation Analysis ◽  
Thermal Environment ◽  
Wind Pressure ◽  
Cultural Value ◽  
Environment Design ◽  
Rapid Urbanization ◽  
Indoor Comfort

As an important type of folk houses with the historical and cultural value in China, the mountainous residence is occupying an important historical position in the rapid urbanization. Whereas, traditional dwellings in Chongqing are in an "overload" condition and poorly indoor comfort. With the help of BIM technology, we can simulation analysis of the ambient temperature, the age of air, wind speed and wind pressure, soughting to a method of quantitative analysis of mountain traditional houses, and the design of ecological energy-saving.

scholarly journals Influence of Lawns on the Summer Thermal Environment and Microclimate of Heritage Sites: A Case Study of Fuling Mausoleum, China

2020 ◽  
Author(s):  
Xiaoyu Wang ◽  
Peng Liu ◽  
Gongwen Xu
Keyword(s):  
Cfd Simulation ◽  
Simulation Analysis ◽  
Thermal Environment ◽  
Measurement Data ◽  
Ground Temperature ◽  
Rapid Urbanization ◽  
Actual Measurement ◽  
Heritage Sites ◽  
Human Thermal Comfort ◽  
The Impact

Abstract The thermal environment and microclimate of heritage sites has been severely impacted by rapid urbanization. This study collected various meteorological measurement data as a reference for computational fluid dynamics (CFD) simulation settings. Then CFD was applied to simulate the impact of lawns on the thermal environment and microclimate of Fuling Mausoleum. We found that lawns and soil can cool the air through evaporation, and thus have a specific cooling effect on the bricked ground. After lawns were planted, the bricked ground temperature decreased by 1.56–17.54°C than that before lawns were planted at 14:00, a decrease of 2.68%–24.20%. Under normal circumstances, when the wind speed or relative humidity increased, the ground temperature dropped. Greenbelt vegetation can adjust the microclimate and human thermal comfort indicators. The consistency of the difference between the actual measurement and the CFD simulation results shows that CFD simulation can thus accurately reflect the internal temperature field distribution if the selection of simulation parameters is reasonable. Theoretical calculation and analysis, experimental measurement research, and modern computer simulation analysis methods applied together constitute a complete system for studying modern physical environmental problems and can provide reliable and economic results.

scholarly journals Influence of grass lawns on the summer thermal environment and microclimate of heritage sites: a case study of Fuling mausoleum, China

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Xiaoyu Wang ◽  
Peng Liu ◽  
Gongwen Xu
Keyword(s):  
Cfd Simulation ◽  
Simulation Analysis ◽  
Thermal Environment ◽  
Measurement Data ◽  
Ground Temperature ◽  
Rapid Urbanization ◽  
Actual Measurement ◽  
Heritage Sites ◽  
Human Thermal Comfort ◽  
The Impact

AbstractThe thermal environment and microclimate of heritage sites has been severely impacted by rapid urbanization. This study collected various meteorological measurement data as a reference for computational fluid dynamics (CFD) simulation settings. Then CFD was applied to simulate the impact of lawns on the thermal environment and microclimate of Fuling Mausoleum. We found that lawns and soil can cool the air through evaporation, and thus have a specific cooling effect on the bricked ground. Simulations with the lawns, the bricked ground temperature decreased by 1.56–17.54 °C than that simulations without the lawns at 14:00, a decrease of 2.68%–24.20%. Under normal circumstances, when the wind speed or relative humidity increased, the ground temperature dropped. Greenbelt vegetation can adjust the microclimate and human thermal comfort indicators. The consistency of the difference between the actual measurement and the CFD simulation results shows that CFD simulation can thus accurately reflect the internal temperature field distribution if the selection of simulation parameters is reasonable. Theoretical calculation and analysis, experimental measurement research, and modern computer simulation analysis methods applied together constitute a complete system for studying modern physical environmental problems and can provide reliable and economic results.

Field Measurement and Analysis of the Micro Climate of a Campus Square

2012 ◽  
Vol 610-613 ◽  
pp. 923-927
Author(s):  
Yan Yan Huang ◽  
Shi Chao Deng
Keyword(s):  
Wind Speed ◽  
Public Space ◽  
Thermal Environment ◽  
Environment Design ◽  
Cold Region ◽  
Actual Measurement ◽  
Data Collection And Analysis ◽  
Measurement And Analysis ◽  
Winter Cold

A square is an important multi-functional public space on campus, which can be used as a venue for traffic, gathering, recreational activities and cultural events, and thus the thermal environment of the campus square will directly influence the overall environmental quality of campus. This paper studies a campus square in the summer-hot and winter-cold region, selects typical positions to conduct actual measurement of parameters, such as temperature, relative humidity, wind speed and solar radiation, which indicate the thermal environment. Based on data collection and analysis, it is concluded that the thermal environment of the campus square is affected by microclimate factors such as the square underlying surface properties, vegetation and building and road orientations. This paper is aimed at exploring the regularity of the correlation between microclimate factors and thermal environment in order to facilitate the improvement of the thermal environment of the campus square, make it more comfortable and provide ideas for the landscape and architectural environment design.

Evaluation of energy generation in Iraqi territory by solar photovoltaic power plants with a capacity of 20 MW

2022 ◽  
Vol 0 (0) ◽  
Author(s):  
Qusay Hassan ◽  
Saadoon Abdul Hafedh ◽  
Ali Hasan ◽  
Marek Jaszczur
Keyword(s):  
Experimental Data ◽  
Wind Speed ◽  
Power Plant ◽  
Ambient Temperature ◽  
Solar Irradiance ◽  
Electricity Generation ◽  
Power Plants ◽  
Solar Photovoltaic ◽  
Photovoltaic Power ◽  
Plant Capacity

Abstract The study evaluates the visibility of solar photovoltaic power plant construction for electricity generation based on a 20 MW capacity. The assessment was performed for four main cities in Iraq by using hourly experimental weather data (solar irradiance, wind speed, and ambient temperature). The experimental data was measured for the period from 1st January to 31st December of the year 2019, where the simulation process was performed at a 1 h time step resolution at the same resolution as the experimental data. There are two positionings considered for solar photovoltaic modules: (i) annual optimum tilt angle and (ii) two-axis tracking system. The effect of the ambient temperature and wind on the overall system energy generated was taken into consideration. The study is targeted at evaluating the potential solar energy in Iraq and the viability of electricity generation using a 20 MW solar photovoltaic power plant. The results showed that the overall performance of the suggested power plant capacity is highly dependent on the solar irradiance intensity and the ambient temperature with wind speed. The current 20 MW solar photovoltaic power plant capacity shows the highest energy that can be generated in the mid-western region and the lowest in the northeast regions. The greatest influence of the ambient temperature on the energy genrated by power plants is observed in the southern regions.

scholarly journals Assessment of ambient dust pollution status at selected point sources (residential and commercial) of Mingaladon area, Yangon region, Myanmar

2018 ◽  
Vol 32 (1) ◽  
pp. 60-68 ◽  
Author(s):  
Sai Nyan Lin Tun ◽  
Than Htut Aung ◽  
Aye Sandar Mon ◽  
Pyay Hein Kyaw ◽  
Wattasit Siriwong ◽  
...  
Keyword(s):  
Wind Speed ◽  
Relative Humidity ◽  
Ambient Temperature ◽  
Traffic Congestion ◽  
Pm10 Concentration ◽  
Particulate Matters ◽  
Dust Pollution ◽  
Content Type ◽  
Pm2.5 And Pm10 ◽  
Pm2.5 Concentration

Purpose Dust (particulate matters) is very dangerous to our health as it is not visible with our naked eyes. Emissions of dust concentrations in the natural environment can occur mainly by road traffic, constructions and dust generating working environments. The purpose of this paper is to assess the ambient dust pollution status and to find out the association between PM concentrations and other determinant factors such as wind speed, ambient temperature, relative humidity and traffic congestion. Design/methodology/approach A cross-sectional study was conducted for two consecutive months (June and July, 2016) at a residential site (Defence Services Liver Hospital, Mingaladon) and a commercial site (Htouk-kyant Junction, Mingaladon) based on WHO Air Quality Reference Guideline Value (24-hour average). Hourly monitoring of PM2.5 and PM10 concentration and determinant factors such as traffic congestion, wind speed, ambient temperature and relative humidity for 24 hours a day was performed in both study sites. CW-HAT200 handheld particulate matters monitoring device was used to assess PM concentrations, temperature and humidity while traffic congestion was monitored by CCTV cameras. Findings The baseline PM2.5 and PM10 concentrations of Mingaladon area were (28.50±11.49)µg/m3 and (52.69±23.53)µg/m3, means 61.48 percent of PM2.5 concentration and 54.92 percent of PM10 concentration exceeded than the WHO reference value during the study period. PM concentration usually reached a peak during early morning (within 3:00 a.m.-5:00 a.m.) and at night (after 9:00 p.m.). PM2.5 concentration mainly depends on traffic congestion and temperature (adjusted R2=0.286), while PM10 concentration depends on traffic congestion and relative humidity (adjusted R2=0.292). Wind speed played a negative role in both PM2.5 and PM10 concentration with r=−0.228 and r=−0.266. Originality/value The air quality of the study area did not reach the satisfiable condition. The main cause of increased dust pollution in the whole study area was high traffic congestion (R2=0.63 and 0.60 for PM2.5 and PM10 concentration).

scholarly journals Study of the Thermal Comfort of a Building that does not Comply with Construction Standards in Madagascar: Experimentation and Simulation with OMEdit

2019 ◽  
Vol 4 (4) ◽  
pp. 124-130
Author(s):  
Jaurès Ratsimbazafiharivola ◽  
H. T. Rakotondramiarana
Keyword(s):  
Developing Countries ◽  
Wind Speed ◽  
Numerical Model ◽  
Thermal Comfort ◽  
Radiation Flux ◽  
Reference Data ◽  
Thermal Environment ◽  
Solar Radiation Flux ◽  
Subjective Study ◽  
Building Standards

A very large number of buildings in developing countries are far from complying with the standards of housing. This paper presents the subjective study of the thermal comfort of a building that does not comply with construction standards or thermal regulations, located in Madagascar. Modeling was done using the Modelica tool, especially its BuildSysPro library. In order to minimize the inaccuracies, a step of an experimental adjustment of the developed numerical model was also carried out usingexperimental reference data that were obtained from the temperaturemeasurementsof the studied building elements as well as the wind speed and the received solar radiation flux. It was found that despite the obvious non-compliance with building standards and thermal regulations, the building has an acceptable thermal environment vis-à-vis its occupant.

scholarly journals Assessing the built environment of neighborhood in the winter city from the perspective of pupils' commuting safety

2020 ◽  
Author(s):  
Hong Leng ◽  
◽  
Huimin Zhao ◽  
Chunyu Zou ◽  
◽  
...  
Keyword(s):  
Built Environment ◽  
Influencing Factors ◽  
Open Space ◽  
Road Traffic ◽  
Thermal Environment ◽  
Gated Communities ◽  
Environment Design ◽  
Signal Identification ◽  
Factors Affecting ◽  
Social Management

Safety commuting environment can promote children’s walking and cycling, thus reducing the risk of obesity and other diseases. Most of the existing studies on children’s safety focus on open space, but pay little attention to children's commuting environment. Moreover, few studies pay attention to the differences between open blocks and gated communities in winter city. Taking Harbin, a winter city in China, as an example, this study uses the optimized IPA method to explore the built environment factors affecting pupils’ commuting safety from three aspects: environment design, social management and road traffic. The results show that the influencing factors of road traffic have the highest impact on pupils‘ commuting safety. In addition, the occupation management in social management also has a great impact. In terms of satisfaction, the satisfaction with gated communities is generally higher than that with open blocks, but the satisfaction of open block is higher in neighbourhood relationship and street thermal environment. By coupling the importance and satisfaction of influencing factors, it is found that safety guardrail, signal identification, occupation management are in urgent need of renovation.

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