scholarly journals Periodic Inspections of Residential Heating Appliances for Solid Fuels - Concept of National Periodic Inspection System

2021 ◽  
Vol 22 (8) ◽  
pp. 86-91
Author(s):  
Jolanta Telenga-Kopyczyńska ◽  
Katarzyna Rychlewska
Keyword(s):  
Solid Fuels ◽  
Inspection System ◽  
Periodic Inspection ◽  
Residential Heating ◽  
Periodic Inspections

scholarly journals Periodic Inspections of Residential Heating Appliances for Solid Fuels: Review of Legal Regulations in Selected European Countries

2021 ◽  
Vol 22 (2) ◽  
pp. 54-62
Author(s):  
Katarzyna Rychlewska ◽  
Jolanta Telenga-Kopyczyńska ◽  
Rafał Bigda ◽  
Jacek Żeliński
Keyword(s):  
European Countries ◽  
Solid Fuels ◽  
Legal Regulations ◽  
Residential Heating ◽  
Periodic Inspections

scholarly journals Image-Based Underwater Inspection System for Abrasion of Stilling Basin Slabs of Dam

2019 ◽  
Vol 2019 ◽  
pp. 1-13
Author(s):  
Yonglong Li ◽  
Hua Zhang ◽  
Shuang Wang ◽  
Haoran Wang ◽  
Jialong Li
Keyword(s):  
Field Experiments ◽  
Concrete Surface ◽  
Inspection System ◽  
Underwater Robot ◽  
Stilling Basin ◽  
Underwater Image ◽  
Surface Damages ◽  
Quantitative Analysis Method ◽  
Exposure Ratio ◽  
Periodic Inspections

The abrasion of stilling basin slabs which is caused by waterborne particles is one of the main surface damages in the operation of hydropower station. For determining whether to repair the stilling basin slabs, periodic inspections of erosion condition of stilling basin slabs are required. The practical problem is how to get the underwater image without unwatering and how to analyse the abrasion though the images. This paper developed a novel underwater inspection system named UIS-1 which consists of a customized underwater robot and special quantitative analysis method for this situation. Firstly, the integrated component was designed for the underwater robot that partially removes the siltation and obtains the image of the concrete surface of stilling basin slabs in the desired position. Secondly, the paper proposed an image algorithm to obtain aggregate exposure ratio for quantitative abrasion analysis. This image algorithm used SLIC superpixel and the SVM machine learning method to detect the coarse aggregate exposure automatically. Then, the aggregate exposure ratio was calculated to analyse the degree of abrasion. Finally, the UIS-1 system was evaluated in the field experiments of a dam in Sichuan, China, and its performance was discussed by comparison.

Periodic Inspection of Compressed Gas Cylinders and Tubes—Flaw Detection Using Acoustic Emission Testing

1988 ◽  
Vol 110 (2) ◽  
pp. 161-167 ◽  
Author(s):  
H. Barthe´le´my
Keyword(s):  
Acoustic Emission ◽  
Flaw Detection ◽  
Internal Corrosion ◽  
Periodic Inspection ◽  
Emission Testing ◽  
Industrial Gases ◽  
Test Pressure ◽  
Acoustic Emission Testing ◽  
Periodic Inspections ◽  
Gas Cylinders

Hydrostatic re-tests are performed on gas cylinders and trailer tubes which are used to supply industrial gases. In this paper we review how to apply acoustic emission tests during periodic inspections to detect flaws, i.e., internal corrosion and cracks, which could occur on these containers during service. It appears that internal corrosion can be very easily detected at low pressure. However, to be sure of detecting cracks, it is best to perform AE tests during pressurization up to the test pressure. AE testing carried out during hydro-testing improves the reliability of the inspection, presents a greater accuracy in flaw detection than the water jacket test, and allows safe extension of the interval between re-tests.

Development of an inspection system for cracks in a concrete tunnel lining

2007 ◽  
Vol 34 (8) ◽  
pp. 966-975 ◽  
Author(s):  
Seung Yeol Lee ◽  
Sang Ho Lee ◽  
Dong Ik Shin ◽  
Young Kap Son ◽  
Chang Soo Han
Keyword(s):  
Image Processing ◽  
Image Data ◽  
Tunnel Lining ◽  
Inspection System ◽  
Visual Methods ◽  
Charge Coupled Device ◽  
Nondestructive Tests ◽  
Series Of Experiments ◽  
Analysis System ◽  
Periodic Inspections

Over the last several decades, many concrete tunnels have been constructed for roads, highways, and railways. For safety in concrete tunnels, periodic inspections have been conducted using nondestructive testing technologies and techniques. However, nondestructive tests cannot replace visual inspection because of their slow and complicated procedures. For this reason, their use has been limited to precision inspections. Visual methods of assessment also require significant time commitments, and they produce subjective results regarding measured crack data. This study proposes an inspection system for the rapid measurement of cracks in tunnel linings and provides an objective method for assessing crack data for safety purposes. The system consists of both image data acquisition and analysis systems. The acquisition system takes images with charge-coupled device (CCD) line-scan cameras. The analysis system extracts crack information from the acquired images using image processing. Measured crack information includes the thickness, length, and orientation of cracks. To improve the accuracy of crack recognition, the geometric properties and patterns of cracks in concrete structures should be applied to image processing. This proposed system was verified through a series of experiments in both laboratory and field environments. Key words: crack, inspection, image processing, tunnel lining, tunnel safety.

scholarly journals The Impact of Solid Fuel Residential Boilers Exchange on Particulate Matter Air Pollution

2021 ◽  
Vol 11 (12) ◽  
pp. 5400
Author(s):  
Silvie Koval ◽  
Jiri Vytisk ◽  
Jana Ruzickova ◽  
Helena Raclavska ◽  
Hana Skrobankova ◽  
...  
Keyword(s):  
Air Pollution ◽  
Solid Fuel ◽  
Ambient Air ◽  
Ambient Air Pollution ◽  
Solid Fuels ◽  
Heating Season ◽  
Daily Average ◽  
Residential Heating ◽  
Combustion Processes ◽  
The Impact

Combustion processes, including the use of solid fuels for residential heating, are a widespread custom for many households. Residential heating is a significant source of ambient air pollution, yet it varies greatly by geography, meteorologic conditions, the prevalence of the type of solid fuel and the technologies used. This study evaluates whether residential heating affects the air quality through modelling three given scenarios of solid fuel boiler exchange at selected locations and comparing the results with measured data. The findings of this study suggest that according to the modelled data, the main air pollution contributor is residential heating since Dolni Lhota (daily average of PM10 = 44.13 μg·m−3) and Kravare (daily average of PM10 = 43.98 μg·m−3) are locations with no industry in contrast to heavily industrial Vratimov (daily average of PM10 = 34.38 μg·m−3), which were modelled for the heating season situation. Nevertheless, actual measurements of PM10 during the same period suggest that the average levels of air pollution were significantly higher than the modelled values for Dolni Lhota by 64% and for Kravare by 51%. Thus, it was assumed that PM long-range or/and transboundary transports were involved.

THE STUDY OF DEGRADATION CONDITION OF HIGH-RISE BUILDING EXTERIOR WALL

2017 ◽  
Vol 4 (1) ◽  
Author(s):  
Chu-Tsen Liao ◽  
Kuang-Jou Chen ◽  
Jen-Chun Hsiao ◽  
Po-Jui Wu ◽  
You-Zhen Fu
Keyword(s):  
Reference Material ◽  
Wall Tile ◽  
City Government ◽  
Inspection System ◽  
Exterior Wall ◽  
External Wall ◽  
Contract Research ◽  
High Rise ◽  
Periodic Inspection ◽  
Seismic Forces

In recent years in Taiwan, some pedestrians were injured by falling external wall tiles. Exterior wall tile fell down for the temperature or other effects of seismic forces, becoming a potential public safety crisis. Office of Building Administration of Taoyuan City Government started inspecting high-rise buildings, which were over eleven stories and constructed before 1995 in Taoyuan city from 2015 to 2016. This study is a contract research. We inspected 298 high-rise buildings’ external wall tiles in Taoyuan City for city government. In this study, we classified the risk of buildings from Level A to E. D and E, which were regarded as the dangerous buildings and in need of repair immediately. D and E accounted for 41.6% percent of total buildings. We also concluded the data in the viewpoints of building age, story, exterior material, direction, and district. The authors hope the conclusion of this study could be submitted as reference material of inspection system, as well as give a significant suggestion to the periodic inspection approach in the future.

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