scholarly journals ANALISIS PENGARUH KELURUSAN POROS KOPLING POMPA HIDRAULIK TERHADAP VARIASI TEKANAN PADA PLTA MANINJAU

2021 ◽  
Vol 4 (2) ◽  
pp. 359-364
Author(s):  
Muchlisinalahuddin Muchlisinalahuddin
Keyword(s):  
Vibration Analysis ◽  
Electrical Power ◽  
Comparison Method ◽  
Hydraulic Pump ◽  
Root Cause ◽  
Shaft Alignment ◽  
Pump Shaft ◽  
Root Cause Failure Analysis ◽  
Vibration Measuring ◽  
Investigation Process

Vibration due to misalignment in the hydraulic pump is detected as the main problem of damage to the pump. Resolved a problem with the alignment of the pump, shaft alignment as an action in overcoming the problem. Vibration measurements are carried out during alignment and misalignment conditions by using a vibration measuring instrument, namely vibration analysis fluke 810. Voltage, current, electrical power, motor & pump rotation, and other operating parameters are observed. Vibration analysis is done by observing the velocity and frequency of the wave signal for alignment and misalignment conditions. Vibration analysis is performed using a comparison method to the ISO 10816-3 tester standard. Finally obtained an ideal vibration in the operation of hydraulic pumps based on the above standards.The method used to analyze using the tool RCFA (root cause failure analysis) which is an investigation process to determine the main causes of a failure mode. From the analysis, we concluded that the formulation RCFA rise broken of coupling.

scholarly journals Visual Narrative of the Loss of Energy after Natural Disasters

Climate ◽  
2019 ◽  
Vol 7 (10) ◽  
pp. 118 ◽  
Author(s):  
Gerardo Castañeda-Garza ◽  
Gabriel Valerio-Ureña ◽  
Takako Izumi
Keyword(s):  
Natural Disasters ◽  
Electrical Power ◽  
Comparison Method ◽  
Qualitative Approach ◽  
The Internet ◽  
Visual Narrative ◽  
Power Outages ◽  
Photographic Images ◽  
Manual Analysis ◽  
Digital Methods

Concerns exists regarding natural disasters, but what about the resulting power outages? This study investigates the characteristics of a digital visual narrative depicting the loss of electrical power after a natural disaster to identify how such situations are represented in images found on the internet. A qualitative approach with an exploratory scope was taken using digital methods. Six events in different places were selected, and 4691 images were analyzed using the Google Cloud Vision API. A constant comparison method was used to identify categories from these images. Then, a manual analysis was performed on a sample of the images of each event, and then categorized. It was found that more than half of the images refer to categories such as infrastructure, nature, and hazards, while the energy category was represented in 13.02% of the images. Most images were photographs; however, the non-photographic images found contained useful information regarding energy. Even when all events featuring power outages, few focused on the lack of energy and more on impacts to the infrastructure, despite energy being required for cities’ recovery.

Root-Cause Failure Analysis of Photocurrent Loss in Polythiophene:Fullerene-Based Inverted Solar Cells

2014 ◽  
Vol 7 (1) ◽  
pp. 618-623 ◽  
Author(s):  
Eszter Voroshazi ◽  
Griet Uytterhoeven ◽  
Kjell Cnops ◽  
Thierry Conard ◽  
Paola Favia ◽  
...  
Keyword(s):  
Solar Cells ◽  
Failure Analysis ◽  
Root Cause ◽  
Root Cause Failure Analysis
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