Acoustic Treatment Solution of the Technical Room in Water Pumping Station—Case Study

2020 ◽  
pp. 131-143
Author(s):  
Darko Mihajlov ◽  
Momir Praščević ◽  
Marko Ličanin ◽  
Aleksandar Gajicki
Keyword(s):  
Pumping Station ◽  
Water Pumping ◽  
Acoustic Treatment

scholarly journals The Problem of Carbon Dioxide Emissions from Closed Coal Mine Shafts – The Overview and the Case Study

2016 ◽  
Vol 61 (3) ◽  
pp. 587-600
Author(s):  
Paweł Wrona ◽  
Józef Sułkowski ◽  
Zenon Różański ◽  
Grzegorz Pach
Keyword(s):  
Carbon Dioxide ◽  
Carbon Dioxide Emissions ◽  
Carbon Dioxide Emission ◽  
Mining Area ◽  
Emission Point ◽  
Water Pumping ◽  
Gas Hazard ◽  
Flow Through ◽  
Reporting Procedures

Abstract Greenhouse gas emissions are a common problem noticed in every mining area just after mine closures. However, there could be a significant local gas hazard for people with continuous (but variable) emission of these gases into the atmosphere. In the Upper Silesia area, there are 24 shafts left for water pumping purposes and gases can flow through them hydraulically. One of them – Gliwice II shaft – was selected for inspection. Carbon dioxide emission with no methane was detected here. Changes in emission and concentration of carbon dioxide around the shaft was the aim of research carried out. It was stated that a selected shaft can create two kinds of gas problems. The first relates to CO2 emission into the atmosphere. Possible emission of that gas during one minute was estimated at 5,11 kg CO2/min. The second problem refers to the local hazard at the surface. The emission was detected within a radius of 8m from the emission point at the level 1m above the ground. These kinds of matters should be subject to regular gas monitoring and reporting procedures.

Control by IoT in Drinking Water Pumping Station and Cisterns

2021 ◽  
Author(s):  
Ing. Leonardo Depetris ◽  
Ing. Damian Romani ◽  
Ing. Joaquin Gonzalez ◽  
Claudio Bottero ◽  
Maciel Rui ◽  
...  
Keyword(s):  
Drinking Water ◽  
Pumping Station ◽  
Water Pumping

A case study of acoustic intervention in classrooms

2020 ◽  
pp. 1351010X2097576
Author(s):  
Ajish K Abraham ◽  
M S Ravishankar
Keyword(s):  
Standard Deviation ◽  
Speech Intelligibility ◽  
Mean Value ◽  
Effective Learning ◽  
Acoustic Treatment ◽  
Speech Clarity

High reverberation times (RTs) have always been an acoustic barrier to effective learning in classrooms. Acoustic corrections to reduce RT involve complex acoustic treatment. Previous studies have indicated that classrooms in most schools do not meet the established acoustic criteria, as the school authorities refrain from such acoustic treatment. Aim of the study was to optimize the RT within classrooms through easily-implementable acoustic corrections. Different combinations of acoustic corrections have been experimented in eight classrooms, through a step-by-step approach to optimize RT. After each acoustic modification, the RT was measured and the speech clarity parameter C50, was estimated. At the final step, RT of the classrooms was diminished to a mean value of 0.74 s (standard deviation = 0.04) from the initial mean value of 4.37 s (standard deviation = 0.42). C50 values corresponding to the final acoustic correction were found to fall within good speech intelligibility scale.

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