Measurement and Analysis on Natural Ventilation of Rural Residential Buildings in ChaoShan Area

2011 ◽  
Vol 368-373 ◽  
pp. 3561-3566
Author(s):  
Jia Yi Jia ◽  
Ling Jin ◽  
Li Hua Zhao
Keyword(s):  
Continuous Monitoring ◽  
Natural Ventilation ◽  
Thermal Environment ◽  
Residential Buildings ◽  
Living Standards ◽  
Wind Pressure ◽  
Measurement And Analysis ◽  
Large Household ◽  
Modern House ◽  
Indoor And Outdoor

In this paper, the present usage of natural ventilation of rural residential buildings in ChaoShan area is in-depth studied through the analysis on thermal environment data of continuous monitoring indoor and outdoor in the transition-site season from several representative typical rural residential buildings in Guangdong ChaoShan area. It revealed the differences between “cheng” and patio, and the fact that wind pressure ventilation is still dominant, because that buoyancy driven ventilation is difficult to form in such houses during transition seasons when generally rain comes with low temperature. And it also pointed out the effect that the elements of modern house (such as: sliding window, window screens, window security and large household appliance) are implanted as the raise of population and living standards had brought to the thermal environment on traditional buildings.

Climatic Strategies of Indoor Thermal Environment for Residential Buildings in Yangtze River Region, China

2011 ◽  
Vol 20 (1) ◽  
pp. 101-111 ◽  
Author(s):  
Baizhan Li ◽  
Wei Yu ◽  
Meng Liu ◽  
Nan Li
Keyword(s):  
Energy Efficiency ◽  
Thermal Comfort ◽  
Yangtze River ◽  
Air Conditioning ◽  
Natural Ventilation ◽  
Thermal Environment ◽  
Residential Buildings ◽  
Design Strategies ◽  
River Region ◽  
Climatic Adaptability

Yangtze River Valley is situated within the Hot Summer and Cold Winter zone, and residents in this region of China would require HVAC system to alleviate thermal comfort conditions, although this is tempered by the Design Code (DBJ50-071-2007) for energy efficiency. A 1-year survey of about 200 residential homes was carried out in eight cities covering the breadth of the region. The acceptable temperature range for the residents in this area was 16.3—28.1°C and the thermal neutral temperature was found to be 27.6°C in summers and 17.5°C in winters. People in different area can vary in their adaptability and comfortableness. Therefore, there is a need to investigate the national comfort parameter introduced in the Code for Design of Heating and Ventilation and Air Conditioning (GB50019-2003). The results found that if air-conditioning system was set to 27.5°C instead of 26°C as required by GBJ19-87: Design Standard of Heating and Ventilation and Air Conditioning, a 16.5% saving of energy consumption could be achieved. The findings demonstrated the role of natural ventilation in the expansion of the thermal comfort zone for the residents, especially during the summer seasons. A climatic adaptability model has been established by this study to contribute to the passive climatic design strategies for a better economic and energy efficiency of buildings.

scholarly journals Evaluation of Thermal Comfort in the Traditional Bourgeoisie Houses in Beirut

2020 ◽  
Vol 3 (1) ◽  
pp. p1
Author(s):  
Jad Hammoud ◽  
Elise Abi Rached
Keyword(s):  
Thermal Comfort ◽  
Natural Ventilation ◽  
Heat Waves ◽  
Thermal Environment ◽  
Thermal Sensation ◽  
Residential Buildings ◽  
Ventilation System ◽  
Electricity Consumption ◽  
Comfort Level ◽  
Climate Zones

The increasing of energy demands has considerably increased the requirements for new and traditional buildings in different climate zones. Unprecedented heat waves have increased climate temperature, in particular, in moderate climate zones such as Lebanon. In Beirut, only the residential sector consumes 50% of total electricity consumption. HVAC (Heating, Ventilation and Air conditioning) systems are used to reach acceptable thermal comfort levels in the new residential buildings. In case of the traditional bourgeoisie houses in Beirut, there are no discussions about the use of HVAC systems to achieve the required thermal comfort level. Thus, to reach an acceptable thermal comfort level, these houses which already contain natural ventilation system shall adapt the modern thermal comfort requirements and thermal comfort strategies and technologies where their architectural features and existing materials condition the available solutions. In order to identify the best options within the possible intervention lines (envelopes, passive strategies, equipment, renewable energy systems), it is necessary to perceive the real performance of this type of houses. In this context, the article presents the results of the study of thermal performance and comfort in a three case studies located in Beirut. Detailed field data records collected are analyzed, with a view to identify the indoor thermal environment with respect to outdoor thermal environment in different seasons. Monitoring also included measurement of hygrothermal parameters and surveys of occupant thermal sensation.

Thermo-Aeraulic Simulation of Mono Façade Natural Ventilation

2017 ◽  
Vol 21 ◽  
pp. 514-519
Author(s):  
Mircea Horne Horneț ◽  
Raluca Dania Todor ◽  
Nicolae Fani Iordan ◽  
Mircea Drăghici ◽  
Cristian Năstac ◽  
...  
Keyword(s):  
Energy Efficient ◽  
Indoor Environment ◽  
Natural Ventilation ◽  
Energy Use ◽  
Thermal Response ◽  
Wind Pressure ◽  
Physical Processes ◽  
Efficient Alternative ◽  
Ventilation Rates ◽  
Indoor And Outdoor

Natural ventilation is an energy efficient alternative for reducing the energy use in buildings, achieving thermal comfort and maintaining a healthy indoor environment. Differences in wind pressure along the façade and differences between indoor and outdoor temperatures create a natural air exchange between indoor and outdoor air. These physical processes are complex, and predicting ventilation rates is difficult. This paper presents a method for determining natural ventilation air flow in single-façade thermo-air system by simulating the room using the program TRNSYS 16. Theoretical checking of the airflow obtained by simulation was performed by comparing the thermal response in the room following the simulation, with interior temperatures measured during the experiment.

Indoor Thermal Environment Studies and Comparisons of Representative Residential Buildings in Urban Village of Guangzhou during Typical Weather in Summer

2011 ◽  
Vol 374-377 ◽  
pp. 66-69
Author(s):  
Zhi Sheng Li ◽  
Jia Wen Liao ◽  
Xu Hong Liu
Keyword(s):  
Air Temperature ◽  
Natural Ventilation ◽  
Thermal Environment ◽  
Residential Buildings ◽  
Correlation Coefficients ◽  
Environment Design ◽  
Indoor Thermal Environment ◽  
Human Thermal Comfort ◽  
Urban Village ◽  
And Control

In order to improve human thermal comfort of residential buildings in urban village, the study of indoor thermal environment is necessary. Three typical selected houses in Huangpu Village were taken as an example to study. After a seven-day field measurement under the condition of natural ventilation, thermal neutral temperature and PMV indices were calculated based on the collected data. It is shown that the PMV values of the houses vary from -0.5 to 2.1, and the acceptance rate differ significantly in different houses and human activities states. The parameters including outdoor air temperature, indoor air temperature and PMV were studied through the linear regression, and the results demonstrate that their correlation coefficients are high, and their relationships have been developed. The results of this work create a precedent for the indoor thermal environment design and control of urban village buildings in China.

scholarly journals Achieving wind comfort through window design in residential buildings in cold climates, a case study in Tabriz city

2020 ◽  
Author(s):  
Atefeh Tamaskani Esfahankalateh ◽  
Mohammad Farrokhzad ◽  
Ommid Saberi ◽  
Amirhosein Ghaffarianhoseini
Keyword(s):  
Thermal Comfort ◽  
Natural Ventilation ◽  
Thermal Environment ◽  
Residential Buildings ◽  
Cold Climate ◽  
The Body ◽  
Dynamics Simulation ◽  
Cold Climates ◽  
The Right ◽  
Window Design

Abstract Air movement affects thermal comfort both by increasing evaporative loss through the skin and heat transfer between the body and surrounding environment through convection. Generally, in cold climates, it is best to avoid wind to better control the thermal environment. However, crafted passive airflow is essential for providing fresh air and natural ventilation at certain times of year. The use of a window of the right size and location in a cold climate is also indispensable. In this study, the wind speed was calculated for the height of a residential building in the city of Tabriz. A computational fluid dynamics simulation was used to calculate the inflow air speed for each window and the comfort conditions were compared. The findings determined the months where window openings can be used to enhance thermal comfort. The analysis shows how the direction and shape of the window play a major role in directing outdoor air flow indoors at the right time in the right quantity. East- and west-facing windows are most favorable and north- and south-facing windows can only be used in some months. This shows how building designers can quantify the effect of window design in each climate for the occupant’s comfort.

Research on the Indoor and Outdoor Wind Environment of University Apartment in the Hot in Summer and Cold in Winter Area

2013 ◽  
Vol 671-674 ◽  
pp. 2240-2244
Author(s):  
Xiang Duan ◽  
Wei Qi Xu ◽  
Ke Xin He
Keyword(s):  
Natural Ventilation ◽  
Simulation Analysis ◽  
Thermal Environment ◽  
High Humidity ◽  
Climatic Region ◽  
Meteorological Element ◽  
Wind Environment ◽  
Outdoor Thermal Environment ◽  
Natural Wind ◽  
Indoor And Outdoor

Wuhan,which is hot in summer and cold in winner climatic region,lies in the east of Jianghan Plain.High temperature and high humidity is characteristics of the city.Thus,it’s vital to strength the natural ventilation of building.Simulation for the situation of wind in Wuhan a certain university in this paper,which take average meteorological element for many years in Wuhan to be initial condition.Selecting Fluent Airpak to conduct flow field Simulation Analysis in the process of calculation.posing problem which exist natural ventilation design universally,according to experimental data,and give tactics to solve it,aiming at utilizing natural wind more effectively and more rationally,and creating comfortable indoor and outdoor thermal environment.

Indoor Thermal Environment and Energy Conservation of Seaside Resident Building in Xiamen in Summer

2012 ◽  
Vol 518-523 ◽  
pp. 4461-4465
Author(s):  
Li Li
Keyword(s):  
Relative Humidity ◽  
Thermal Comfort ◽  
Natural Ventilation ◽  
Thermal Environment ◽  
Residential Buildings ◽  
Influence Factors ◽  
Residential Building ◽  
Building Energy ◽  
Indoor Thermal Environment ◽  
Ventilation Condition

The good and comfortable environment is beneficial to the health, and can improve working efficiency, make people imbued with more creativity. This means strengthening the competitiveness, increase economic efficiency. So, creating the good building environment not merely has a meaning on technology, and has social effect and economic meaning. In order to understand the situation of indoor thermal environment of the seaside residential building generally, a field measurement on the condition of summer was made in Xiamen from the last ten days of July to the first ten day of Aug, 2005, 2006 and 2008. Test the thermal environment and investigate the thermal comfort in residential buildings of natural ventilation condition, analyze the main influence factors of indoor thermal environment, and evaluate indoor thermal comfort with effective temperature (ET). The curves of indoor air temperature and relative humidity reflect the character of high temperature and high relative humidity in summer in Xiamen residential buildings. Discuss the methods of building energy saving. Suggest that, for seaside city in hot days, the natural ventilation and interval natural ventilation should be the main fundamental methods of improving the resident building thermal environment.

scholarly journals Thermal Performance of Single-Story Air-Welled Terraced House in Malaysia: A Field Measurement Approach

2020 ◽  
Vol 13 (1) ◽  
pp. 201
Author(s):  
Pau Chung Leng ◽  
Gabriel Hoh Teck Ling ◽  
Mohd Hamdan Ahmad ◽  
Dilshan Remaz Ossen ◽  
Eeydzah Aminudin ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Air Temperature ◽  
Thermal Performance ◽  
Field Measurement ◽  
Natural Ventilation ◽  
Residential Buildings ◽  
Wet Bulb Globe Temperature ◽  
Natural Lighting ◽  
Ventilation Performance ◽  
Globe Temperature

The provision requirement of 10% openings of the total floor area stated in the Uniform Building By-Law 1984 Malaysia is essential for natural lighting and ventilation purposes. However, focusing on natural ventilation, the effectiveness of thermal performance in landed residential buildings has never been empirically measured and proven, as most of the research emphasized simulation modeling lacking sufficient empirical validation. Therefore, this paper drawing on field measurement investigates natural ventilation performance in terraced housing with an air-well system. The key concern as to what extent the current air-well system serving as a ventilator is effective to provide better thermal performance is to be addressed. By adopting an existing single-story air-welled terrace house, indoor environmental conditions and thermal performance were monitored and measured using HOBO U12 air temperature and humidity, the HOBO U12 anemometer, and the Delta Ohm HD32.3 Wet Bulb Globe Temperature meter for a six-month duration. The results show that the air temperature of the air well ranged from 27.48 °C to 30.92 °C, with a mean relative humidity of 72.67% to 79.25%. The mean air temperature for a test room (single-sided ventilation room) ranged from 28.04 °C to 30.92 °C, with a relative humidity of 70.16% to 76.00%. These empirical findings are of importance, offering novel policy insights and suggestions. Since the minimum provision of 10% openings has been revealed to be less effective to provide desirable thermal performance and comfort, mandatory compliance with and the necessity of the bylaw requirement should be revisited.

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