RESULTS OF QUASI-OPTIMUM PUMP OPERATION BASED ON STORMWATER INFLOW PREDICTION IN AN EXTENSIVE STORMWATER DRAINAGE SYSTEM

1985 ◽  
pp. 175-182 ◽  
Author(s):  
Takayuki Kobayashi ◽  
Masayuki Suga ◽  
Eiji Tashiro
Keyword(s):  
Drainage System ◽  
Pump Operation ◽  
Inflow Prediction

scholarly journals Efficiency of electricity use by mine drainage plants.

2021 ◽  
Vol 24 (1) ◽  
pp. 64-68
Author(s):  
KONDRATENKO, V. ◽  
◽  
KALINICHENKO, V. ◽  
KARDASH D. ◽  
◽  
...  
Keyword(s):  
Mine Drainage ◽  
Pressure Gauge ◽  
Drainage System ◽  
Electrical Network ◽  
Technical Diagnostics ◽  
Flow Meter ◽  
Pump Operation ◽  
Electricity Use ◽  
Rational Organization ◽  
Pumping Units

The experience of operating mine drainage plants indicates significant consumption of electricity consumed by pump electric motors. This situation of mine drainage is not always justified. Sometimes this can be caused by the operation of the components of the pumping unit (pump, electric motor, pipeline, electrical network) with underestimated efficiency. The article describes the methodology and provides methods for monitoring the efficiency of the use of electricity both as a whole by the drainage system and its constituent elements. The most vulnerable of the components of the drainage system is the pumping units themselves. This is primarily due to the complexity of the design of the pumps, the presence of moving parts and significant pressures during their operation. It is generally recommended to use a pressure gauge on the discharge line, a vacuum gauge on the water inlet side, and a flow meter to measure the pump flow to monitor the pump unit. In addition to these devices, for the diagnosis of unsatisfactory pump operation, it is recommended to additionally install a manometer that measures the pressure in the unloading chamber, a manometer that measures the pressure behind the unloading disc and a flow meter that measures the water flow in the unloader. The indicators of the proposed three control devices make it possible to determine by calculation such important pump parameters as the value of the axial force and the dimensions of the end and annular clearances of the unloading unit. This technique can be used as the basis for technical diagnostics and rational organization of the operation of existing installations. This allows you to control and promptly eliminate malfunctions that occur during the operation of drainage, save valuable equipment and eliminate wasteful energy costs.

Stereological Analyses of Hepatocyte Ultrastructure Monitor Arsenic Liver Burdens

1980 ◽  
Vol 38 ◽  
pp. 442-443
Author(s):  
E. M. B. Sorensen ◽  
R. R. Mitchell ◽  
L. L. Graham
Keyword(s):  
Drainage System ◽  
Water Levels ◽  
Ultrastructural Changes ◽  
Hepatocyte Ultrastructure ◽  
Lepomis Cyanellus ◽  
Large Numbers ◽  
Activation Data ◽  
Water Analyses ◽  
Municipal Lake ◽  
Green Sunfish

Endemic freshwater teleosts were collected from a portion of the Navosota River drainage system which had been inadvertently contaminated with arsenic wastes from a firm manufacturing arsenical pesticides and herbicides. At the time of collection these fish were exposed to a concentration of 13.6 ppm arsenic in the water; levels ranged from 1.0 to 20.0 ppm during the four-month period prior. Scale annuli counts and prior water analyses indicated that these fish had been exposed for a lifetime. Neutron activation data showed that Lepomis cyanellus (green sunfish) had accumulated from 6.1 to 64.2 ppm arsenic in the liver, which is the major detoxification organ in arsenic poisoning. Examination of livers for ultrastructural changes revealed the presence of electron dense bodies and large numbers of autophagic vacuoles (AV) and necrotic bodies (NB) (1), as previously observed in this same species following laboratory exposures to sodium arsenate (2). In addition, abnormal lysosomes (AL), necrotic areas (NA), proliferated rough endoplasmic reticulum (RER), and fibrous bodies (FB) were observed. In order to assess whether the extent of these cellular changes was related to the concentration of arsenic in the liver, stereological measurements of the volume and surface densities of changes were compared with levels of arsenic in the livers of fish from both Municipal Lake and an area known to contain no detectable level of arsenic.

BIM-Based Automated Drainage System Design in Prefabrication Construction

2020 ◽  
Author(s):  
Nan Zhang ◽  
Yichen Tian ◽  
Jingwen Wang ◽  
Mohamed Al-Hussein
Keyword(s):  
System Design ◽  
Drainage System

Penentuan Metode Intensitas Hujan Berdasarkan Karakteristik Hujan dari Stasiun Pengamat Hujan Disekitar Kecamatan Karawang Timur

2019 ◽  
Vol 5 (1) ◽  
Author(s):  
Melisa Permatasari ◽  
M. Candra Nugraha ◽  
Etih Hartati
Keyword(s):  
Drainage System ◽  
Daily Rainfall ◽  
Intensity Analysis ◽  
Rain Intensity ◽  
Rainy Period ◽  
Discharge Plan ◽  
Calculation Results ◽  
Value Determination ◽  
Maximum Daily Rainfall ◽  
Method Approach

<p>The rain intensity is the high rainfall in unit of time. The length of rain will be reversed by the amount rain intensity. The shorter time the rain lasts, the greater of the intensity and re-period of its rain. The value of rain intensity is required to calculate the flood discharge plan on the drainage system planning area in East Karawang district. Determining the value rain intensity is required the maximum daily rainfall data obtained from the main observer stations in the Plawad station planning area. The method of determination rain intensity analysis can be done with three methods: Van Breen, Bell Tanimoto and Hasper der Weduwen. Selected method is based on the smallest deviation value. Determination deviation value is determined by comparing rain intensity value of Van Breen method, Bell Tanimoto, Hasper der Weduwen. By comparing rain intensity value of the Van Breen method, Bell Tanimoto, Hasper der Weduwen with the results of calculating three methods through the method approach Talbot, Sherman and Ishiguro. Calculation results show that the method of rain has smallest deviation standard is method Van Breen with Talbot approach for rainy period (PUH) 2, 5, 10, 25, 50 and 100 years.</p>

Hydrologic and hydraulic evaluation of drainage system in eastern Slovak Lowland

2012 ◽  
Vol 7 (3) ◽  
pp. 91-98 ◽  
Author(s):  
Zuzana Pálinkášová ◽  
Andrej Šoltész
Keyword(s):  
Drainage System
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