scholarly journals DEVELOPMENT OF AN ALTERNATIVE SOURCE OF ELECTRICITY BASED ON ASCENDING AIR FLOWS OF A NATURAL VENTILATION SHAFT

2020 ◽  
Vol 20 (3) ◽  
pp. 47-63
Author(s):  
O Kabanov ◽  
◽  
S Panfilov ◽  
A Meleshkin
Keyword(s):  
Natural Ventilation ◽  
Alternative Source ◽  
Ventilation Shaft ◽  
Air Flows

scholarly journals Determination of the speed of air outflow from the ventilation shaft of the warm attic of a multi-storey residential building under different initial conditions

2021 ◽  
Vol 18 (5) ◽  
pp. 126-129
Author(s):  
E. A. Anshukova ◽  
Keyword(s):  
Mathematical Modeling ◽  
System Performance ◽  
Natural Ventilation ◽  
Initial Conditions ◽  
Ventilation System ◽  
Residential Building ◽  
Operating Conditions ◽  
Ventilation Shaft

The operating conditions of a warm attic as an element of natural ventilation of a multi-storey residential building have an impact on the efficiency of the entire ventilation system performance, as well as on the condition of the enclosing structures. The study of the distribution of microclimate parameters in its volume makes it possible to more fully assess the ongoing processes. The result of calculating the rate of air outflow from the ventilation shaft of a warm attic by mathematical modeling is provided.

Green Ventilation System Design for Underground Garage

2015 ◽  
Vol 763 ◽  
pp. 105-109
Author(s):  
Shih Ming Chen ◽  
Yu Ying Huang ◽  
Yeng Horng Perng
Keyword(s):  
Air Quality ◽  
Indoor Air ◽  
Natural Ventilation ◽  
Ventilation System ◽  
Branch Pipe ◽  
Cost Effective ◽  
Design System ◽  
Horizontal Branch ◽  
Ventilation Shaft ◽  
Indoor Spaces

In recent years, the issues of indoor air quality and thermal comfort in underground garages have attained considerable importance. The purpose of this study is to present a green natural ventilation system with a ventilation shaft connected to the outdoors through a horizontal branch pipe. The system combines with a diaphragm wall and steel cage frame for an underground garage or similar underground enclosed spaces. The design system reduces use of tradition fans and motors used in mechanical ventilation. It improves exhaust from indoor spaces and reduces energy consumption. The green design of the ventilation system in this study is cost effective, saves energy and improves the air quality in an underground garage.

The influence of radiation heat transfer on the prediction of air flows in rooms under natural ventilation

2017 ◽  
Vol 138 ◽  
pp. 530-538 ◽  
Author(s):  
M. Alejandra Menchaca-Brandan ◽  
F. Alonso Dominguez Espinosa ◽  
Leon R. Glicksman
Keyword(s):  
Heat Transfer ◽  
Natural Ventilation ◽  
Radiation Heat Transfer ◽  
Radiation Heat ◽  
Air Flows

Study on the Shaft Height of Natural Ventilation Using Smoking Shaft in Urban Tunnel

2011 ◽  
Vol 90-93 ◽  
pp. 2297-2300
Author(s):  
Wei Zhong ◽  
Jian Peng Yang ◽  
Bao An Pei ◽  
Wei Zhang
Keyword(s):  
Natural Ventilation ◽  
Inertia Force ◽  
Flow State ◽  
Critical Height ◽  
Large Eddy Simulation Model ◽  
Eddy Simulation ◽  
Ventilation Shaft ◽  
Structure Of Flow ◽  
Large Eddy ◽  
Height Increase

The characteristics of smoke flow in natural ventilation shaft are studied in this paper, Using the computational fluid dynamics software FDS5.0 to build a 3D model of an urban tunnel with a smoking shaft, Large Eddy Simulation model was used to obtain the structure of flow field and the mass flow rate of natural ventilation at different shaft height, The results show that when the shaft height is low, the driving force of exhaust is weak and the exhaust capacity reduces rapidly, the flow state in shaft is controlled by horizontal inertia force; when the shaft height increase to a critical height, the exhaust effect enhance significantly, the flow state in shaft will change to stack effect control.

Use of water-soluble polysaccharides from mango (Mangifera indica L.) fruits as alternative source of mutanase inductors

Planta Medica ◽  
2012 ◽  
Vol 78 (11) ◽  
Author(s):  
A Wiater ◽  
K Próchniak ◽  
M Janczarek ◽  
M Pleszczyńska ◽  
M Tomczyk ◽  
...  
Keyword(s):  
Mangifera Indica ◽  
Water Soluble ◽  
Alternative Source

Potential of Palm Oil Empty Fruit Bunch as Biogas Substrate

2019 ◽  
Vol 2 (1) ◽  
pp. 59-64
Author(s):  
Vincentius Vincentius ◽  
Evita H. Legowo ◽  
Irvan S. Kartawiria
Keyword(s):  
Palm Oil ◽  
Fermentation Process ◽  
Biogas Production ◽  
Wastewater Sludge ◽  
Empty Fruit Bunch ◽  
Alternative Source ◽  
The Earth ◽  
The One ◽  
Wet Fermentation ◽  
Water Ratio

Natural gas is a source of energy that comes from the earth which is depleting every day, an alternative source of energy is needed and one of the sources comes from biogas. There is an abundance of empty fruit bunch (EFB) that comes from palm oil plantation that can become a substrate for biogas production. A methodology of fermentation based on Verein Deutscher Ingenieure was used to utilize EFB as a substrate to produce biogas using biogas sludge and wastewater sludge as inoculum in wet fermentation process under mesophilic condition. Another optimization was done by adding a different water ratio to the inoculum mixture. In 20 days, an average of 6gr from 150gr of total EFB used in each sample was consumed by the microbes. The best result from 20 days of experiment with both biogas sludge and wastewater sludge as inoculum were the one added with 150gr of water that produced 2910ml and 2185ml of gas respectively. The highest CH 4 produced achieved from biogas sludge and wastewater sludge with an addition of 150gr of water to the inoculum were 27% and 22% CH 4 respectively. This shows that biogas sludge is better in term of volume of gas that is produced and CH percentage.

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