Influence of Natural Ventilation on Indoor PM2.5 Concentration in Residential Building

2014 ◽  
Vol 675-677 ◽  
pp. 194-198
Author(s):  
Li Zhao ◽  
Chao Chen ◽  
Guo Qing Cao
Keyword(s):  
Pollution Control ◽  
Natural Ventilation ◽  
Residential Building ◽  
Ventilation Rate ◽  
Outdoor Air ◽  
Change Rate ◽  
Air Change Rate ◽  
Indoor Pm2.5 ◽  
Life Behavior ◽  
Pm2.5 Concentration

According to PM2.5 contamination in residential building, a mathematical model is established about the effect of natural ventilation on PM2.5 pollution control based on calculus method. On the basis of some actual cases, such as indoor smoking and cleaning, indoor PM2.5 concentration is calculated for different air change rate and outdoor air quality. The concept of critical ventilation rate is provided. The conclusion of the paper provides some advice on natural ventilation and indoor life behavior.

scholarly journals Analysis of Calculation Errors for Single-zone and Multi-Zone Natural Ventilation model in Residential Building

2018 ◽  
Vol 53 ◽  
pp. 03034
Author(s):  
Zheqi Xuan ◽  
Xiaohong Zheng ◽  
Zhenni Shi
Keyword(s):  
Thermal Expansion ◽  
Thermal Expansion Coefficient ◽  
Rainy Season ◽  
Natural Ventilation ◽  
Residential Building ◽  
Zone Model ◽  
Tracer Gas ◽  
Change Rate ◽  
Air Change Rate ◽  
Different Seasons

The typical residential building in Changzhou City, Jiangsu Province was selected for natural ventilation measurement during the transitional season, the plum rainy season, summer and winter. In this paper, SF6 is used as the tracer gas, and tracer gas decay method was selected to obtain the air change rate in the room under each measuring condition. EnergyPlus(EP) was used to calculate the single-zone and multizone air change rate which can be compared with the measured values respectively. It was found that the calculated values of single-zone model were generally small and the errors were large. And the calculated values of multi-zone model have a significant reduction in error after considering the equivalent infiltration area. In addition, the effective infiltration area will be different due to the existence of the thermal expansion coefficient for different seasons.

scholarly journals Comparison of Downdraught and Up Draft Passive Air Conduction Systems (PACS) in a Winery Building

Buildings ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 259
Author(s):  
Ádám László Katona ◽  
István Ervin Háber ◽  
István Kistelegdi
Keyword(s):  
Air Conditioning ◽  
Natural Ventilation ◽  
Dynamics Simulation ◽  
Computational Fluid Dynamics Simulation ◽  
General Applicability ◽  
Change Rate ◽  
Air Change Rate ◽  
Simulation Based ◽  
Ventilation Performance ◽  
Air Conduction

A huge portion of energy consumption in buildings comes from heating, ventilation, and air conditioning. Numerous previous works assessed the potential of natural ventilation compared to mechanical ventilation and proved their justification on the field. Nevertheless, it is a major difficulty to collect enough information from the literature to make decisions between different natural ventilation solutions with a given situation and boundary conditions. The current study tests the passive air conduction system (PACS) variations in the design phase of a medium-sized new winery’s cellar and production hall in Villány, Hungary. A computational fluid dynamics simulation based comparative analysis enabled to determine the differences in updraft (UD) and downdraught (DD) PACS, whereby the latter was found to be more efficient. While the DD PACS performed an air change range of 1.02 h−1 to 5.98 h−1, the UD PACS delivered −0.25 h−1 to 12.82 h−1 air change rate. The ventilation performance of the DD version possessed lower amplitudes, but the distribution was more balanced under different wind incident angles, thus this version was chosen for construction. It could be concluded that the DD PACS provides a more general applicability for natural ventilation in moderate climates and in small to medium scale industry hall domains with one in- and one outlet.

scholarly journals Proposing Alternative Solutions to Enhance Natural Ventilation Rates in Residential Buildings in the Cfa Climate Zone of Rasht

2021 ◽  
Vol 13 (2) ◽  
pp. 679
Author(s):  
Roya Aeinehvand ◽  
Amiraslan Darvish ◽  
Abdollah Baghaei Daemei ◽  
Shima Barati ◽  
Asma Jamali ◽  
...  
Keyword(s):  
Natural Ventilation ◽  
Residential Buildings ◽  
Residential Building ◽  
Ventilation Rate ◽  
Humid Climate ◽  
The Sustainable Development ◽  
Passive Strategies ◽  
Development Goals ◽  
Ventilation Rates ◽  
Ventilation Systems

Today, renewable resources and the crucial role of passive strategies in energy efficiency in the building sector toward the sustainable development goals are more indispensable than ever. Natural ventilation has traditionally been considered as one of the most fundamental techniques to decrease energy usage by building dwellers and designers. The main purpose of the present study is to enhance the natural ventilation rates in an existing six-story residential building situated in the humid climate of Rasht during the summertime. On this basis, two types of ventilation systems, the Double-Skin Facade Twin Face System (DSF-TFS) and Single-Sided Wind Tower (SSWT), were simulated through DesignBuilder version 4.5. Then, two types of additional ventilation systems were proposed in order to accelerate the airflow, including four-sided as well as multi-opening wind towers. The wind foldable directions were at about 45 degrees (northwest to southeast). The simulation results show that SSWT could have a better performance than the aforementioned systems by about 38%. Therefore, the multi-opening system was able to enhance the ventilation rate by approximately 10% during the summertime.

Measurement of Natural Ventilation Rate in a Japanese Residential Building

2008 ◽  
Vol 7 (1) ◽  
pp. 37-47 ◽  
Author(s):  
Shigeki Nishizawa ◽  
Takao Sawachi ◽  
Hiromi Habara ◽  
Hironao Seto
Keyword(s):  
Natural Ventilation ◽  
Residential Building ◽  
Ventilation Rate

Influence of natural ventilation rate on indoor PM2.5 deposition

2018 ◽  
Vol 144 ◽  
pp. 357-364 ◽  
Author(s):  
Cong Liu ◽  
Jiayu Yang ◽  
Siyu Ji ◽  
Yuxin Lu ◽  
Peichan Wu ◽  
...  
Keyword(s):  
Natural Ventilation ◽  
Ventilation Rate ◽  
Indoor Pm2.5

scholarly journals Application of the Chimney Cap as a Method of Improving the Effectiveness of Natural Ventilation in Buildings

2020 ◽  
Vol 27 (3) ◽  
pp. 168-175
Author(s):  
Romana Antczak-Jarząbska ◽  
Maciej Niedostatkiewicz
Keyword(s):  
Natural Ventilation ◽  
Transition Period ◽  
Physical Phenomenon ◽  
Ventilation System ◽  
Cost Savings ◽  
Change Rate ◽  
Indoor Pollutants ◽  
Air Change Rate ◽  
Chimney Effect

AbstractAdequately designed natural ventilation is the cheapest and easiest way to effectively remove indoor pollutants and keep the air inside a building fresh. A prediction of the performance and effectiveness of ventilation in order to determine the design of a ventilation system can provide real and long-term cost savings. The worst time in terms of the efficiency of natural ventilation is the spring-autumn transition period [7]. In order to improve the efficiency of natural ventilation, chimney caps are used, among others. They are designed to improve the chimney effect described in colloquial language as a chimney draft. The chimney effect is a physical phenomenon of the formation of a spontaneous flow of a warmer gas, e.g. air, from the bottom up in stem channels [12]. The article analyses the influence of the chimney cowl on the improvement of the chimney effect in an apartment of a multi-family building with natural ventilation. Long-term tests of the chimney draft were carried out for the case without and with a chimney cap. The paper presents the results of the performance (air change rate, ACH) of natural ventilation for a building with an inlet gap measured for the transitional season (between the heating and the summer season). The measurements were performed during a windy period.

Courtyard Space and Natural Ventilation of National Fitness Center in Hot and Humid Areas

2013 ◽  
Vol 361-363 ◽  
pp. 988-994
Author(s):  
Wei Zhang ◽  
Jin Li
Keyword(s):  
Natural Ventilation ◽  
Comfort Level ◽  
Analog Computation ◽  
Fitness Centers ◽  
Change Rate ◽  
Fitness Center ◽  
Air Change Rate ◽  
External Conditions

To improve the air change rate under natural ventilation and the comfort level of sport field of national fitness centers in hot and humid areas, an analog computation was conducted for courtyard models with different sizes and shapes via the softwares such as Fluent and Weather Tool, taking Guangzhou area as an example. It is discovered that under the same external conditions and in a certain building boundary size, enlarging the width of courtyard is beneficial for improving indoor ventilation of sport spaces with the same depth, and semi-open courtyard can lead to better ventilation compared with completely open courtyard with the same width.

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