Stack Ventilation

Sustainaspeak ◽  
2018 ◽  
pp. 250-252
Author(s):  
Elizabeth Lewis
Keyword(s):  
Stack Ventilation

Analysis of Carbon Dioxide in Kindergartens in Poland

2017 ◽  
Author(s):  
Katarzyna Gładyszewska-Fiedoruk ◽  
Sebastian Jachimowicz
Keyword(s):  
Carbon Dioxide ◽  
Mechanical Ventilation ◽  
Eastern Europe ◽  
Carbon Dioxide Concentration ◽  
Considerable Improvement ◽  
Permissible Level ◽  
Main Determinants ◽  
Stack Ventilation ◽  
Indoor Conditions

Children in kindergartens spend between five and ten hours a day, the quality of air inside is very important. Kindergartens are public buildings. Kindergartens in Poland do not have mechanical ventilation, most often use stack ventilation, which is frequently aided by airing. The three considered buildings were located in eastern Europe. The main objective of the research was to evaluate the interior conditions, especially with regard to carbon dioxide concentration. In the afternoon, the permissible level of carbon dioxide concentration was substantially exceeded (by 190% at the most in first series of measurement). The present research has resulted in considerable improvement of indoor conditions in the analyzed kindergartens (less than 140% in third series of measurement). The presence of children and ventilation habits seemed to be the main determinants of IAQ and carbon dioxide.

Combining light pipe and stack ventilation — some development aspects

2000 ◽  
pp. 395-400 ◽  
Author(s):  
Kai Sirén ◽  
Tapio Helenius ◽  
Li Shao ◽  
Shaun Smith ◽  
Brian Ford ◽  
...  
Keyword(s):  
Light Pipe ◽  
Stack Ventilation

Three Dimensional Simulation of Ventilation Flow Through a Solar Windcatcher

2019 ◽  
Author(s):  
Peter Abdo ◽  
Rahil Taghipour ◽  
B. P. Huynh
Keyword(s):  
Natural Ventilation ◽  
Air Flow ◽  
Ventilation System ◽  
Three Dimensional ◽  
Windward Side ◽  
Efficient Design ◽  
Indoor Space ◽  
Wind Speeds ◽  
Air Stream ◽  
Stack Ventilation

Abstract Natural ventilation is the process of supplying and removing air through an indoor space by natural means. There are two types of natural ventilation occurring in buildings: winddriven ventilation and buoyancy driven or stack ventilation. The most efficient design for natural ventilation in buildings should implement both types of natural ventilation. Stack ventilation which is temperature induced is driven by buoyancy making it less dependent on wind and its direction. Heat emitted causes a temperature difference between two adjoining volumes of air, the warmer air will have lower density and be more buoyant thus will rise above the cold air creating an upward air stream. Combining the wind driven and the buoyancy driven ventilation will be investigated in this study through the use of a windcatcher natural ventilation system. Stack driven air rises as it leaves the windcatcher and it is replaced with fresh air from outside as it enters through the positively pressured windward side. To achieve this, CFD (computational fluid dynamics) tool is used to simulate the air flow in a three dimensional room fitted with a windcatcher based on the winddriven ventilation alone, buoyancy driven ventilation alone, and combined buoyancy and winddriven ventilation. Different wind speeds between 0 up to 2.5 m/s are applied and the total air flow rate through the windcatcher is investigated with and without temperature of 350 K applied at the windcatcher’s outlet wall. As the wind speed increased the efficiency of the solar windcatcher decreased.

Application of Stack Ventilation in Buildings

2011 ◽  
Vol 71-78 ◽  
pp. 5103-5107
Author(s):  
Tong Sheng Xin ◽  
Jian Jun Liu
Keyword(s):  
Architectural Design ◽  
Natural Ventilation ◽  
Construction Engineering ◽  
Stack Ventilation

Stack ventilation represents a natural ventilation solution commonly employed in construction engineering. The paper discusses with abundant examples the working theory, conditions, methodology and architectural design of stack ventilation.

scholarly journals Enhancement of stack ventilation in hot and humid climate using a combination of roof solar collector and vertical stack

2010 ◽  
Vol 45 (10) ◽  
pp. 2296-2308 ◽  
Author(s):  
Wardah Fatimah Mohammad Yusoff ◽  
Elias Salleh ◽  
Nor Mariah Adam ◽  
Abdul Razak Sapian ◽  
Mohamad Yusof Sulaiman
Keyword(s):  
Solar Collector ◽  
Humid Climate ◽  
Hot And Humid Climate ◽  
Stack Ventilation

scholarly journals Improvement of the Chimney Effect in Stack Ventilation

2021 ◽  
Vol 11 (19) ◽  
pp. 9185
Author(s):  
Romana Antczak-Jarząbska ◽  
Krzysztof Pawłowski ◽  
Maciej Niedostatkiewicz
Keyword(s):  
Natural Ventilation ◽  
Ventilation System ◽  
Common Denominator ◽  
Air Inlet ◽  
Transparent Barrier ◽  
Scale Experiment ◽  
Stack Ventilation ◽  
Chimney Effect ◽  
Rotary Type ◽  
Made In

The article is focused on the airflow in a ventilation system in a building. The work examines the methods which enhance the chimney effect. In this paper, three cases with different chimneys were analyzed for the full-scale experiment. These cases were characterized by different geometrical and material parameters, leading to differences in the intensity of the ventilation airflow. The common denominator of the cases was the room with the air inlet and outlet to the ventilation system. The differences between the experimental cases concerned the chimney canal itself, and more precisely its part protruding above the roof slope. The first experimental case concerned a ventilation canal made in a traditional way, from solid ceramic brick. The second experimental case concerned the part that led out above the roof slope with a transparent barrier, called a solar chimney. In the third experimental case, a rotary type of chimney cap was installed on the chimney to improve the efficiency of stack ventilation. All these cases were used to determine the performance of natural ventilation—Air Change per Hour (CH). Additionally, the paper presents a technical and economic comparison of the solutions used.

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