scholarly journals THE INFLUENCE OF FINISH TOOLING ON FRICTION PROPERTIES OF STEEL APPLIED TO SEA WATER PUMP SHAFTS

2014 ◽  
Vol 21 (2) ◽  
pp. 185-192
Author(s):  
Wojciech Labuda ◽  
Adam Charchalis
Keyword(s):  
Sea Water ◽  
Water Pump

Wave Energy-Driven Resonant Sea-Water Pump

1997 ◽  
Vol 119 (3) ◽  
pp. 191-195 ◽  
Author(s):  
S. P. R. Czitrom
Keyword(s):  
Numerical Model ◽  
Sea Water ◽  
Scale Model ◽  
Water Pump ◽  
Incoming Wave ◽  
Frequency Wave ◽  
Variable Volume ◽  
Mass Spring ◽  
Air Compression ◽  
Compression Chamber

A wave-driven sea-water pump which operates by resonance is described. Oscillations in the resonant and exhaust ducts perform similar to two mass-spring systems coupled by a third spring acting for the compression chamber. Performance of the pump is optimized by means of a variable volume air compression chamber (patents pending) which tunes the system to the incoming wave frequency. Wave tank experiments with an instrumented, 1:20-scale model of the pump are described. Performance was studied under various wave and tuning conditions and compared to a numerical model which was found to describe the system accurately. Successful sea trials at an energetic coastline provide evidence of the system’s viability under demanding conditions.

A Research Based on the Deep Self-Balanced Hydraulic Pump

2011 ◽  
Vol 305 ◽  
pp. 411-415
Author(s):  
Bao De Jing ◽  
Bin Bin Lv ◽  
Zeng Jun Pan ◽  
Long Yi ◽  
Zhu Ge Gang ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Sea Water ◽  
Model Simulation ◽  
Water Pump ◽  
Technology Research ◽  
Hydraulic Pump ◽  
Pump Housing ◽  
The Status ◽  
Water Hydraulic ◽  
Simulation Results

The article will give information about the status of sea water pump technology research, carry out the analysis of the water pump slipper, piston and water pump housing and other key parts of hydraulic pumps, and finally make some optimization and innovation. In addition, there will be a mathematical model simulation for four major friction of the hydraulic pump sea water through the MatLab . The simulation results of the design of water hydraulic pump has a certain significance.

scholarly journals Study of Flood Impact Handling in Pekalongan District

2022 ◽  
Vol 955 (1) ◽  
pp. 012014
Author(s):  
M A Salim ◽  
A B Siswanto ◽  
T Mindiastiwi
Keyword(s):  
Qualitative Data ◽  
Sea Water ◽  
Secondary Data ◽  
Research Approach ◽  
Sheet Pile ◽  
Water Pump ◽  
Traffic Conditions ◽  
Maintenance Factors ◽  
Pump House ◽  
Long Storage

Abstract The flood disaster that occurred in Pekalongan district in February 2021 was caused by the high intensity of rain for one week with rainfall >50 mm/day and the ebb and flow of sea water due to tides reaching 0.9-1.1 meters. Other problems due to flooding in Pekalongan district are change in land use, land subsidence, waste, erosion-sedimentation, as well as operation and maintenance factors. Losses due to floods cause material and building losses and traffic conditions are paralyzed. The method used in this research is primary and secondary data collection, descriptive qualitative data processing by describing understanding, research approach with field observations. Flood handling that has been carried out is by adding an emergency sliding door to the drainage, procuring a mobile water pump with a capacity of 250 liters/second, a CCSP (Corrugated Concrete Sheet Pile) embankment, rehabilitation of the Bremi River floodgate, construction of a Mrican pump house with a capacity of 8×2 m3/second, and construction of a 2,200 meter long Silempeng earthen embankment. The emergency handling that was carried out during the floods of February 2021 was the opening of the Long Storage Silempeng-Sengkarang and the preparation of sandbags and large sacks for emergency handling.

scholarly journals THE SELECTION AND PERFORMANCE OF CERAMIC COMPONENTS IN A SEA-WATER PUMP

1996 ◽  
Vol 1996 (3) ◽  
pp. 3-12 ◽  
Author(s):  
C A Brookes ◽  
M J Fagan ◽  
R D James ◽  
J McConnachie
Keyword(s):  
Sea Water ◽  
Water Pump ◽  
Ceramic Components ◽  
And Performance

Sea Water Pump Station Basin Mathematical Hydraulic Model Test (CFD Analysis)

2009 ◽  
Author(s):  
Sadegh Barzegar ◽  
Alireza Elhami Amiri ◽  
Pooyan Rahbar ◽  
Mehdi Assadi Niazi
Keyword(s):  
Mathematical Model ◽  
Free Surface ◽  
Model Test ◽  
Flow Rate ◽  
Sea Water ◽  
Water Pump ◽  
Pumping Station ◽  
Water Pumping ◽  
Pump Station ◽  
The Mathematical Model

Background and aim: A sea water intake, with original design of the six drum screen and twenty sea water pump intake with very different flow rate connected to header bay. The capacity of Origin Sea water intake including huge pump station and drum screen is 200,000 m3/hr. The purpose of the mathematical hydraulic model test of the sea water pumping station is to verify that the basin allows a good operating condition for each pump. To ensure a good operating condition for each pump, the design of the seawater basin has to insure: • A correct filter working; • Low transversal velocities; • A flow without vortex. Method and material: The mathematical model of the basin allows to know the flow and to verify: • The main dimensions of the pumping station; • The distance between the inlet ducts and the filters; • The distance between the filters and pump chambers. Result: in the first basin, the flow patterns no problems. Only swirl at the exit of culverts and near the free surface, and two areas where the flow has no velocity were observed. In the downstream other filters, we observe also a circulation that generates a tangential velocity. Conclusion: The mathematical model of the sea water pumping station has allowed calculating three cases (without and with filter stopped) for the low water level and nominal flow rate. In most difficult case, we observe some recirculation, mainly near the free surface, without more influence on principal flow. In the three cases, the distribution of the flow rate between the drum screens is uniform; the gap is inferior to 2%. At the entry of the pump chambers, the velocity fluctuations and the angle are low. Consequently, the secondary flows in pump chambers will be limited.

scholarly journals DISTRIBUTION OF URANIUM IN WATER OF GRESIK COASTAL WATERS

2010 ◽  
Vol 9 (2) ◽  
pp. 211-216 ◽  
Author(s):  
June Mellawati
Keyword(s):  
Water Sample ◽  
Coastal Waters ◽  
Sea Water ◽  
Uranium Concentration ◽  
Vertical Mixing ◽  
Industrial Area ◽  
Quality Standard ◽  
Water Pump ◽  
Phosphate Industry

Determination of uranium in water sample at Gresik coastal waters around Gresik industrial area have been carrid out. The purpose of research is to find the distribution of uranium at the coastal where the phosphate industry standing and potencially to contribute uranium pollutant to the waters. The measurement of uranium was pasive of Gamma Spectrometry, and uranium was measured as 234Th (uranium daughters) on 92.80 and 1001.03 keV gamma energies. Sea water sample was taken up by water pump sampler as a vertical mixing. The sample was sampling on the highest tide and lowest ebb, at the east season (March-August) west season (September-February). The concentration of 238U on higher tide of the west season are range between 0.0016-0.0128 Bq/l, while on lowest ebb of the east season are 0,0013-0,0877 Bq/l. There was significantly different (α= 5%) of uranium concentration in water between two seasons (east and west) in tide and ebb respectively. According to Quality Standard from Dirjen BATAN No.293/Dj/VII/1995 (radioactivity on environment), the concentration of 238U in water obtained from coastal around phosphate industry are still lower than that of recomended values (10.000 Bq/l).   Keywords: uranium, sea water, coastal of Gresik

Optimization of Maintenance Strategy for Sea Water Pumps in Nuclear Plants

2021 ◽  
Author(s):  
Ling Zhao ◽  
Deyi Liu ◽  
Ming Zhao
Keyword(s):  
Nuclear Power ◽  
Sea Water ◽  
Safety Analysis ◽  
Calculation Model ◽  
Water Pump ◽  
Initial Event ◽  
Maintenance Program ◽  
Nuclear Plants ◽  
Water Pumps ◽  
Service Inspection

Abstract Probabilistic Safety Analysis (PSA) methodology is a significant supplement to the deterministic safety analysis in the nuclear power plant. PSA can be used to evaluate the NPP device change, equipment maintenance, in service inspection. The practicability of modifying sea water pump maintenance programme is evaluated in this paper by determining the initial event probability in fault-tree and modifying the PSA calculation model. Based on the evaluation results, the preventive maintenance of sea water pump and 6kv switch can be changed from executed in the plant overhaul to executed in the routine maintenance. This could make a great contribution in optimizing the NPP sea water pump maintenance program.

scholarly journals Failure analysis based on ship’s machinery maintenance system in Bung Tomo training ship

2020 ◽  
Vol 9 (8) ◽  
Author(s):  
Ari Yudha Lusiandri ◽  
Tri Cahyadi ◽  
Karmini . ◽  
Kuncoro Luhur W
Keyword(s):  
Learning Process ◽  
Sea Water ◽  
Water Cooling ◽  
Remedial Measures ◽  
Water Pump ◽  
Merchant Marine ◽  
Maintenance System ◽  
The Impact ◽  
Causes Of Failure ◽  
Made In

The Bung Tomo Training Ship with a weight of 12 S7 GT, a LWT of 899 tons and a LOA of 63 m, is the only training ship owned by Surabaya Merchant Marine Polytechnic. This ship was made in 2 017 with a capacity of 300 people. The existence of the ship is very important for the learning process at Surabaya Merchant Marine Polytechnic because it is used by cadets to sail practice every Saturday and Sunday. Damage to the ship's machinery can be caused by poor planning and implementation and is known after the ship has begun to operate. To prevent greater damage or disturbance to the Bung Tomo Training Ship, an analysis of the failure of the machinery maintenance system is needed. This research aims to obtain analysis of the failure of machinery on the Bung Tomo Training Ship by using the Failure Mode and Effects Analysis (FMEA) through identification of the causes of failure, the impact caused and possible remedial measures to prevent greater damage. Several components with high RPN are deserve to be a concern or top priority in machinery maintenance of the Bung Tom o Training Ship, namely: sea water pump, freshwater pump, pipeline, OWS, freshwater cooling, sea water cooling pump, and fresh water generator.

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