scholarly journals PENGARUH VARIASI JARAK ANTARA KATUP LIMBAH DENGAN KATUP PENGHANTAR TERHADAP EFISIENSI POMPA HIDRAM PVC 2 INCHI PARAREL

2020 ◽  
Vol 5 (1) ◽  
pp. 37-41
Author(s):  
Defmit B.N Riwu ◽  
Dominggus G. H. Adoe ◽  
Seprianus Rudolf Membubu
Keyword(s):  
Potential Energy ◽  
Water Flow ◽  
Driving Force ◽  
Water Sources ◽  
Long Distance ◽  
Flow Energy

Abstrak Pompa hidram merupakan salah satu jenis pompa yang tidak membutuhkan energi listrik atau bahan bakar. Energi potensial dari sumber air yang dialirkan sebagai daya penggerak. Dimana alat ini bekerja pada sumber air yang memiliki kemiringan, sebab alat ini membutuhkan energi terjunan air dari ketinggian lebih besar atau sama dengan 1 meter yang masuk ke dalam pompa. Dalam pengoperasinya pompa ini mempunyai keuntungan yaitu dengan menggunakan pipa PVC yang dengan sederhana merancangnya juga dapat dibuat dengan peralatan bengkel. Penelitian ini dilakukan untuk mengetahui pengaruh variasi jarak antara katup limbah dengan katup penghantar terhadap efisiensi pompa hydram. Metode yang digunakan adalah experimen lapangan dengan beberapa perubahan pada variasi jarak antara katup limbah dengan katup penghantar adalah 10 cm, 20 cm,30 cm. Dari hasil penelitian bahwa debit pemompaan optimum mengalami peningkatan pada ukuran pendek yaitu 0,00011633 m3/detik, debit limbah semakin besar pada ukuran jarak panjang yaitu 0,00086013 m3/detik, dengan jumlah ketukan terjadi yaitu 84 kali. Sehingga efisiensi hidram menurut teori d’aubussion diperoleh hasil tertinggi yaitu 71,02 %. Kata Kunci: Pompa hidram 2 inchi, double katup limbah, katup penghantar, dan efisiensi D’aubuission Abstract Hydram pump is one type of pump that does not require electricity or fuel. Potential energy from water sources that is channeled as a driving force. Where this tool works at a source of water that has a slope, because this tool requires water flow energy from a height greater than or equal to 1 meter into the pump. In the operation of this pump has the advantage of using PVC pipes which are simple to design can also be made with workshop equipment. This research was conducted to determine the effect of variations in the distance between the waste valve and the delivery valve on the efficiency of the hydram pump. The method used is a real experimental with some changes in the variation of the distance between the waste valve and the delivery valve is 10 cm, 20 cm, 30 cm. From the results of the study that the optimum pumping discharge increased in the short size of 0.00011633 m3 / second, the greater the discharge of waste at a long-distance size of 0.00086013 m3 / second, with the number of beats occurring at 84 times. So that the efficiency of hydrams according to the theory of 'aubussion obtained the highest yield of 71.02%. Keywords: 2-inch hydram pump, double valve waste, delivery valve, and D'obuission efficiency.

J and CTOD Based Tensile Strain Capacity Prediction for Pipelines with a Surface Crack in Girth Weld

2021 ◽  
Author(s):  
Youn-Young Jang ◽  
Nam-Su Huh ◽  
Ik-Joong Kim ◽  
Young-Pyo Kim
Keyword(s):  
Crack Initiation ◽  
Internal Pressure ◽  
Surface Crack ◽  
Driving Force ◽  
Tensile Strain ◽  
Structural Integrity ◽  
Accurate Estimation ◽  
Long Distance ◽  
Crack Driving Force ◽  
Girth Welding

Abstract Long-distance pipelines for the transport of oil and natural gas to onshore facilities are mainly fabricated by girth welding, which has been considered as a weak location for cracking. Pipeline rupture due to crack initiation and propagation in girth welding is one of the main issues of structural integrity for a stable supply of energy resources. The crack assessment should be performed by comparing the crack driving force with fracture toughness to determine the critical point of fracture. For this reason, accurate estimation of the crack driving force for pipelines with a crack in girth weld is highly required. This paper gives the newly developed J-integral and crack-tip opening displacement (CTOD) estimation in a strain-based scheme for pipelines with an internal surface crack in girth weld under axial displacement and internal pressure. For this purpose, parametric finite element analyses have been systematically carried out for a set of pipe thicknesses, crack sizes, strain hardening, overmatch and internal pressure conditions. Using the proposed solutions, tensile strain capacities (TSCs) were quantified by performing crack assessment based on crack initiation and ductile instability and compared with TSCs from curved wide plate tests to confirm their validity.

scholarly journals Water flow energy harvesters for autonomous flowmeters

2016 ◽  
Vol 773 ◽  
pp. 012019 ◽  
Author(s):  
Sebastien Boisseau ◽  
Alexandre-Benoit Duret ◽  
Matthias Perez ◽  
Emmanuel Jallas ◽  
Eric Jallas
Keyword(s):  
Water Flow ◽  
Energy Harvesters ◽  
Flow Energy

scholarly journals The Hydraulic Modelling on Sediments Ponds in Binanga Aron River, North Sumatera Indonesia

2019 ◽  
Vol 8 (2) ◽  
pp. 392-404
Keyword(s):  
Water Flow ◽  
Water Availability ◽  
Soil Mechanics ◽  
Water Source ◽  
Water Sources ◽  
Hydraulic Modelling ◽  
Sediment Storage ◽  
Irrigation Area ◽  
Water Quality Status ◽  
Primary Channel

The development of dams and sediments ponds which is the hydrological planning to improve the aspect of irrigation, river engineering, foundations, soil mechanics, environmental engineering, hydrology and hydraulics. The management difficulty for a decision maker of environmental impacts which is the river's condition does not change for the better in direct response to reduction in nutrient concentration. The aims of this study to evaluate the design of reservoirs building and analysing the water flow and volume of sediment storage in the Binanga Aron River, Samosir, North Sumatera Indonesia. The hydraulic modelling on sediments ponds will ensuring the availability of sufficient volume of water, river flows and water quality status. The primary channel building is equipped with a door to prevent the rinsing water flow back to the primary channel and prevent the entry of rinsing water containing sediment into the canal. Then, the insufficient water availability from the river that is used as a water source in the irrigation area, then the irrigation area is still possible to supply water from nearby water sources. From the result, the volume of water recorded 1,977 ltr/s/ha with simultaneously delivery system. It is necessary to adjust the position of the dam, where the channel flow depth in the sedimentary bag building at least 0.236 m, the discharge ranges from 0.078 - 0.263 m3 /sec. The water availability planned of water sources into artificial reservoirs in the Binanga Aron River to maintain the water supply

Overview of Research on the Influence of Permeable Structures

2013 ◽  
Vol 405-408 ◽  
pp. 2115-2122
Author(s):  
Qian Qian Shang ◽  
Hui Xu ◽  
Guo Bin Li
Keyword(s):  
Water Flow ◽  
Flow Condition ◽  
River Regulation ◽  
Adverse Impact ◽  
Local Flow ◽  
Flow Energy ◽  
Similarities And Differences ◽  
Protective Structures

The protective structures on the shore often used in the river regulation and channel rectification works are divided into solid structures and permeable structures. The solid structures will cause an intensive change of the local flow condition, and lead to adverse impact as scouring of local foundation and edges; the permeable structures which can dissipate the flow energy are gradually popularized for use. Common permeable structures include the tetrahedron-like penetrating frame used for engineering and vegetation on the shore, etc. This paper takes the tetrahedron-like penetrating frame and vegetation for example, summarizes research on the behavior of water flow and sediment affected by permeable structures, discusses the similarities and differences as well as different effects of the functions of the solid structures and permeable structures, and finally concludes the features of application of permeable structures.

Driving Force and Influence of Habitat Conditions on Tubifex tubifex (Oligochaeta, Tubificidae) Drift in Source Water

2014 ◽  
Vol 522-524 ◽  
pp. 1005-1008
Author(s):  
Fang Dong Hou ◽  
Fang Wang ◽  
Xiao Bao Nie
Keyword(s):  
Drinking Water ◽  
Water Flow ◽  
Driving Force ◽  
Driving Forces ◽  
Tubifex Tubifex ◽  
Source Water ◽  
Habitat Conditions ◽  
Overlying Water ◽  
Influence Of Temperature ◽  
Water Plant

Excessive propagation of Tubifex tubifex in eutrophic source water can result in the emergence of them in the drinking water plant, which has been a troublesome problem in recent years. Our objectives were to investigate the driving force of drift and quantify the influence of temperature and DO on the worm drift. Results showed that one of the major driving forces of the worm drift was water flow, which exhibited its effect by direct shear stress on the worm or inducing sediment suspension. The worm drift rates were increased with the decrease of temperature and DO content. The results confirmed that worm drift from sediment to overlying water, which was induced by water flow and could be influenced by temperature, DO content and sediment property was the main cause of worm pollution in drinking water plant.

Identifying the Mechanisms of Enhanced Water Flow Through Carbon Nanotubes

2008 ◽  
Author(s):  
J. A. Thomas ◽  
A. J. H. McGaughey
Keyword(s):  
Carbon Nanotubes ◽  
Water Flow ◽  
Flow Rate ◽  
Driving Force ◽  
Slip Length ◽  
Dynamics Simulation ◽  
Flow Area ◽  
Water Viscosity ◽  
Flow Through ◽  
External Driving

Pressure-driven water flow through carbon nanotubes (CNTs) with diameters ranging from 1.66 nm to 4.99 nm is examined using molecular dynamics simulation. The flow rate enhancement, defined as the ratio of the observed flow rate to that predicted from the no-slip Hagen-Poiseuille relation, is calculated for each CNT. The enhancement decreases with increasing CNT diameter and ranges from 433 to 47. By calculating the variation of water viscosity and slip length as a function of CNT diameter, it is found that the results can be fully explained in the context of continuum fluid mechanics. The enhancements are lower than previously reported experimental results, which range from 560 to 100000, suggesting a miscalculation of the available flow area and/or the presence of an uncontrolled external driving force (such as an electric field) in the experiments.

scholarly journals PENGOLAHAN IKAN DI DAERAH ALIRAN SUMBER AIR PANAS BUMI DI DESA PAYO KABUPATEN HALMAHERA BARAT PROVINSI MALUKU UTARA

2020 ◽  
Vol 7 (1) ◽  
pp. 45
Author(s):  
Abdurrachman Baksir ◽  
Nebuchadnezzar Akbar ◽  
M. Yunus Hi Abbas ◽  
Iswandi Wahab
Keyword(s):  
Traditional Medicine ◽  
Water Flow ◽  
Room Temperature ◽  
Water Sources ◽  
Hot Water ◽  
Geothermal Water ◽  
Fish Processing ◽  
Flow Temperature ◽  
Research Material ◽  
Geothermal Potential

Potential geothermal water is located on the coast of West Halmahera Regency. The geothermal potential is utilized by the community as a medium of traditional medicine and local tourism. Utilization of hot water sources as a fish processing media has not been done. The purpose of this study was to determine fish processing using a modified oven in geothermal water flow. The research material is anchovy (Stolephorus indicus) measuring 10 cm. Fish drying equipment is made closed (airtight) as a whole. The process of fish maturation is done by laying the fish on the base located in the oven. The results showed that the fish cooked at room temperature 2 hours at room temperature 21 oC with geothermal water flow temperature 49oC-51 oC.

An Underwater Magnetically Coupled Bistable Vibration Energy Harvester Using Wings

2019 ◽  
Author(s):  
Hong-Xiang Zou ◽  
Ke-Xiang Wei ◽  
Lin-Chuan Zhao ◽  
Wen-Ming Zhang ◽  
Lei Zuo ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Water Flow ◽  
Energy Harvester ◽  
High Reliability ◽  
Average Power ◽  
Vibration Energy ◽  
Coupling Mechanism ◽  
Vibration Energy Harvester ◽  
Water Flow Velocity ◽  
Flow Energy

Abstract Piezoelectric flow energy harvesting can be a potential way to yield endless electrical energy for small mechanical systems and wireless sensors. We propose a novel magnetically coupled bistable vibration energy harvester using wings for the applications in the water environment. The water flow energy can be harvested through the induced vibration of wings. The flextensional transducer can be packaged conveniently by using non-contact magnetic coupling mechanism. The magnetic force is amplified by the flextensional structure and transferred to the piezoelectric layer, thereby achieving higher power density and better reliability. A prototype was fabricated and tested in a water flume, which attended a maximum power of about 400 μW and the average power of 55 μW at the water flow velocity of 4 m/s. No significant variation occurred to the performance of the harvester after five days of continuous operation in the water, which indicates that the magnetically coupled vibration energy harvesting method has high reliability in the underwater environment.

scholarly journals Long frontal waves and dynamic scaling in freely evolving equivalent barotropic flow

2019 ◽  
Vol 866 ◽  
Author(s):  
B. H. Burgess ◽  
D. G. Dritschel
Keyword(s):  
Kinetic Energy ◽  
Potential Energy ◽  
Energy Decay ◽  
Dynamic Scaling ◽  
Flow Energy ◽  
Energy Decay Rate ◽  
Long Wave ◽  
Barotropic Flow ◽  
Flow Features ◽  
Frontal Dynamics

We present a scaling theory that links the frequency of long frontal waves to the kinetic energy decay rate and inverse transfer of potential energy in freely evolving equivalent barotropic turbulence. The flow energy is predominantly potential, and the streamfunction makes the dominant contribution to potential vorticity (PV) over most of the domain, except near PV fronts of width $O(L_{D})$, where $L_{D}$ is the Rossby deformation length. These fronts bound large vortices within which PV is well-mixed and arranged into a staircase structure. The jets collocated with the fronts support long-wave undulations, which facilitate collisions and mergers between the mixed regions, implicating the frontal dynamics in the growth of potential-energy-containing flow features. Assuming the mixed regions grow self-similarly in time and using the dispersion relation for long frontal waves (Nycander et al., Phys. Fluids A, vol. 5, 1993, pp. 1089–1091) we predict that the total frontal length and kinetic energy decay like $t^{-1/3}$, while the length scale of the staircase vortices grows like $t^{1/3}$. High-resolution simulations confirm our predictions.

Sign in / Sign up

Export Citation Format

Share Document