scholarly journals Performance Characteristics of a Small Hammer Head Pump

2019 ◽  
Author(s):  
Krishpersad Manohar ◽  
Anthony Ademola Adeyanju ◽  
Kureem Vialva
Keyword(s):  
Effective Means ◽  
Water Flow Rate ◽  
Maximum Height ◽  
Pump Efficiency ◽  
Inlet Section ◽  
Flowing Fluid ◽  
Test Configuration ◽  
External Power Source ◽  
Hammer Head ◽  
Head Height

Abstract. Many rural farming areas are located far from reliable electricity supply, hence, having a reliable source of water for crops and livestock can prove to be an expensive venture. A water pump operating on the water hammer effect requires no external power source and can serve as an effective means of pumping water to a higher altitude once a reliable supply is available. The small hammer-head pump was designed to operate on the hammer head effect created by the sudden stoppage of a flowing fluid. This design consisted of an inlet section followed by the pump body, a pressure section and an outlet. The experimental set-up for testing the hammer head pump was designed with a variable head input and an adjustable head output. For each test configuration, ten samples of pump supply water and pump waste water were collected. The water samples were collected for 30 s in each case. The results showed delivered water flow rate varied according to a cubic variable with respect to pump outlet height. The pump was capable of delivering water to a maximum height of 8 to 10 times the height of the input head. The pump operated at average efficiencies of 26 %, 16 % and 6 % when the delivery height was twice, four times and six times the input head, respectively. There was a 5 % incremental decrease in pump efficiency as the delivery height increased in increments of the corresponding input head height.

scholarly journals Performance characteristics of a small water-hammer head pump

2019 ◽  
Vol 12 (2) ◽  
pp. 59-64
Author(s):  
Krishpersad Manohar ◽  
Anthony Ademola Adeyanju ◽  
Kureem Vialva
Keyword(s):  
Water Hammer ◽  
Maximum Height ◽  
Pump Efficiency ◽  
Inlet Section ◽  
Flowing Fluid ◽  
Test Configuration ◽  
Small Water ◽  
External Power Source ◽  
Hammer Head ◽  
Head Height

Abstract. Many rural farming areas are located far from a reliable electricity supply; hence, obtaining a reliable source of water for crops and livestock can prove to be an expensive venture. A water pump operating on the water-hammer effect requires no external power source and can serve as an effective means of pumping water to a higher altitude once a reliable supply is available. A low-cost small water-hammer head pump was designed to operate on the water-hammer head effect created by the sudden stoppage of a flowing fluid. This design consisted of an inlet section followed by the pump body, a pressure section and an outlet. The experimental set-up for testing the water-hammer head pump was designed with a variable head input and an adjustable head output. For each test configuration, a total of 10 samples of pump supply water and pump exhausted water were collected. The water samples were collected for 30 s in each case. The results showed a non-linear variation of water flow with respect to pump outlet height. The pump was capable of delivering water to a maximum height of 8 to 10 times the height of the input head. The pump operated at average efficiencies of 26 %, 16 % and 6 % when the delivery height was 2, 4 and 6 times the input head height, respectively. There was a 5 % incremental decrease in pump efficiency as the delivery height increased in increments of the corresponding input head height.

scholarly journals Influence of Submerged Entry Nozzle Port Blockage on the Meniscus Fluctuation Considering Various Operational Parameters

Metals ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 269 ◽  
Author(s):  
Manish Kumar ◽  
Praveen Mishra ◽  
Apurba Kumar Roy
Keyword(s):  
Flow Rate ◽  
Gas Flow ◽  
Wave Amplitude ◽  
Water Flow Rate ◽  
Submerged Entry Nozzle ◽  
Casting Process ◽  
Water Model ◽  
Maximum Height ◽  
Operational Parameters ◽  
The Right

The continuous casting process (CCP) is the most vital part of steelmaking. The flow pattern near the submerged entry nozzle (SEN) and mould greatly influence the quality of the slab produced. The present investigation was carried out to gain knowledge regarding the meniscus fluctuation under different nozzle port blockage conditions by water model experiments. The experiments were carried out to study the effect of no blockage, 25% blockage, 50% blockage, and 75% blockage of the nozzle port on mould-level fluctuations. The result shows that when the liquid flow rate increases, the wave amplitude increases. In these experiments, the average and maximum meniscus fluctuations were measured while changing different variables such as the water flow rate, gas flow rate, and one-side percentage blockage of the SEN port while the other side was fully open. The observation shows that when the port size decreases, the fluid steel mixed from the obstructing side to the open side results in asymmetry. The average and maximum wave amplitude increases with decreasing submergence depth. It was observed that the maximum height of the standing waves in the mould continued rising on the non-blocked side of the SEN. Blockage increases from 25% to 75%, and with 75% blockage of the right side of the SEN port, the mould-level fluctuation at the left side of the mould was extreme, while that of the right side was relatively quiet.

scholarly journals Sexual dimorphism in morphometric characters of Mystus singaringan from Klawing River in Central Java, Indonesia: Strategic instruction for conservation development

2019 ◽  
Vol 20 (4) ◽  
pp. 1133-1139
Author(s):  
TAUFIK BUDHI PRAMONO ◽  
DIANA ARFIATI ◽  
MAHENO SRI WIDODO ◽  
UUN YANUHAR
Keyword(s):  
Sexual Dimorphism ◽  
Maximum Height ◽  
Morphometric Characters ◽  
Male And Female ◽  
Dorsal Fin ◽  
Central Java ◽  
Significant Difference ◽  
Adipose Fin ◽  
Head Height ◽  
Digital Caliper

Abstract. Pramono TB, Arfiati D, Widodo MS, Yanuhar U. 2019. Sexual dimorphism in morphometric characters of Mystus singaringan from Klawing River in Central Java, Indonesia: Strategic instruction for conservation development. Biodiversitas 20: 1133-1139. This study aims to determine the sexual dimorphism of Mystus singaringan (Senggaringan fish) based on morphometric characters. The measurement of 24 morphometric characters in 30 M. singaringan from Klawing River was carried out using a digital caliper (0.01 mm). Morphometric data of M. singaringan analyzed using t-test have showed significant difference in 12 morphometric characters between sexes, such as standard length, head height, distance of the tip of the muzzle to eyes, distance of the tip of the muzzle to adipose fin, height of dorsal fin, height of pectoral fin, basic length of adipose fin, height of adipose fin, maximum height, length of first nasal barbel, length of first mandibular barbel, and length of second mandibular barbel. Analysis of growth of morphometric characters shows that there is a linear relationship between all morphometric characters and total length. The type of growth of all morphometric characters in both male and female M. singaringan is negative allometric.

scholarly journals The effect of air injection system on airlift pump performance

2020 ◽  
Vol 48 (4) ◽  
pp. 800-807
Author(s):  
Ekhlas Fayyadh ◽  
Nibras Mahdi ◽  
Ali Mohammed
Keyword(s):  
Water Flow Rate ◽  
Circular Cross Section ◽  
Air Injection ◽  
Injection System ◽  
Pump Efficiency ◽  
Airflow Rate ◽  
Riser Pipe ◽  
Airlift Pump ◽  
And Performance ◽  
Churn Flow

In the current study, a novel design of an air injection system for an airlift pump was designed and tested. The pump has a circular cross-section and composed of three parts; suction pipe, injection system, and riser pipe. The riser pipe has a diameter of 31.7 mm and a length of 2 m. The performance of the pump was tested using different submergence ratios, ranging from 0.15 to 0.3, and the injected airflow rate was ranging from 1.65 kg/h to 13.32 kg/h. The results showed that both the airflow rate and the submergence ratio have a significant effect on the capacity and performance of the pump. Besides, it was found that the best range of pump efficiency was in the slug and slug-churn flow regimes. Moreover, the highest efficiency was at the most significant submergence ratio of 0.3. A reasonable enhancement in water flow rate was achieved using the current air injection design when compared with the conventional airlift pump injections system.

scholarly journals OPTIMATION OF FIRE EXTINGUISHMENT SYSTEMS IN X STATION CENTER OF CRUDE OIL AND GAS STORAGE

2021 ◽  
Vol 15 (1) ◽  
Author(s):  
Amiral Aziz ◽  
Andre Nugroho
Keyword(s):  
Flow Rate ◽  
Oil And Gas ◽  
Water Flow Rate ◽  
Cooling Water ◽  
Maximum Flow ◽  
System Capacity ◽  
Pump Efficiency ◽  
Fire Extinguishment ◽  
Fire Extinguishing ◽  
Cooling Water Flow Rate

This paper discusses some research results that were carried out to optimize the fire extinguishment system of X Station in South Sumatera. To optimize the fire extinguishing system at station X, a system modification has been done, which included: changes in the number of stockpile tank units, changes in capacity and dimensions of oil tanks, and changes in fire wall construction. With the change in capacity and dimensions, especially the storage tank unit, it is necessary to recalculate whether the water demand in the fire protection system is still sufficient according to the existing system condition. From this research, it can be concluded that the maximum flow rate of foam under the existing condition is 1631.6 gpm while the optimum ondition is 65% smaller than the existing system condition at 570.54 gpm. The cooling water flow rate of 615.09 gpm at optimum ondition is lower than the existing system conditions of 1409.33 gpm. The required water to the fire extinguishment system is 250 gpm; this value is smaller than the existing system capacity of 2074 gpm. By using performance curves of Grundfos Data Booklet, for the capacity of pump 1250 gpm, the total head pump and pump efficiency are obtained 103.48 m and 77.5 %, respectively. Keywords: optimation; tank; water; foam; pump

Design and Testing of a Scroll Pump Efficiency

2013 ◽  
Vol 712-715 ◽  
pp. 1428-1434
Author(s):  
Sukit Litikorn ◽  
Ponkit Kritmaitree
Keyword(s):  
Water Flow Rate ◽  
Pressure Head ◽  
Maximum Efficiency ◽  
Pump Efficiency ◽  
Cnc Machine ◽  
Ac Motor ◽  
Industrial Standards ◽  
The Relationship ◽  
Design And Testing ◽  
Frequency Inverter

This research designed and tested the efficiency of a scroll pump. The fixed and orbiting scrolls mathematic models were used in designing and constructing the scroll pump. The coordinates of the curves along the fixed and orbiting scroll wraps were calculated by SCILAB 5.1 program. The scroll coefficient is 3.0 mm while discrepancy of starting roll angle is radian. The scroll pump was modeled by Solid Work program and manufactured by a CNC machine. The testing facilities were design and constructed under the Japanese Industrial Standards (JIS B 8301) and used 0.5 horsepower, 3 phase AC motor, and motor speeds were controlled by a frequency inverter. The test speeds of motor were 700, 800, 900, 1000 and 1,100 rpm. The results were displayed as the relationship between water flow rate and pressure head (Q-H Curve). The Q-H curves were highly sloped. The maximum efficiency of the scroll water pump were 67.56 % at the volume flow 20.46 L/min. and pressure head 11.48 psig

An Ultrastructural Study of Chronic Pyelonephritis in Macaca Arctoides

1976 ◽  
Vol 34 ◽  
pp. 310-311
Author(s):  
T.W. Smith ◽  
J.A. Roberts ◽  
B.J. Martin
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Ultrastructural Study ◽  
Effective Means ◽  
Chronic Pyelonephritis ◽  
Macaca Arctoides ◽  
Left Ureter ◽  
E Coli ◽  
Transmission Electron ◽  
Sizeable Number

Chronic pyelonephritis is one of the most common diseases of the kidney and accounts for a sizeable number of cases of renal insufficiency in man, however its pathogenesis requires further elucidation. Transmission electron microscopy may serve as a uniquely effective means of observing details of the nature of this disease. The present paper describes preliminary results of an ultrastructural study of chronic pyelonephritis in Macaca arctoides (stumptail monkey).The infection was induced in these experiments in a retrograde fashion by means of a unilateral catheterization of the left ureter whereby an innoculum of 10 cc of broth containing approximately 2 billion E. coli per cc and radio-opaque dye were injected under pressure (mimicing vesico-ureteric reflux).

Benefits and Characteristics of Mentoring Students and Young Professionals

2008 ◽  
Vol 18 (2) ◽  
pp. 67-73 ◽  
Author(s):  
Kristal Mills
Keyword(s):  
Leadership Development ◽  
Clinical Supervision ◽  
Effective Means ◽  
Academic Research ◽  
Mentoring Programs ◽  
Teaching Skills ◽  
Online Mentoring ◽  
Young Professionals ◽  
Research And Teaching ◽  
Workplace Retention

Abstract Mentoring has long been believed to be an effective means of developing students' clinical, research, and teaching skills to become competent professionals. The American Speech-Language-Hearing Association (ASHA) has developed two online mentoring programs, Student to Empowered Professional (S.T.E.P. 1:1) and Mentoring Academic Research Careers (MARC), to aid in the development of students. This paper provides a review of the literature on mentoring and compares and contrasts mentoring/mentors with clinical supervision/preceptors. Characteristics of effective mentors and mentees are offered. Additionally, the benefits of clinical mentoring such as, teambuilding in the workplace, retention of new staff, leadership development, and improved job satisfaction are discussed.

A Pilot Study of Mobile Telephone Message Interventions with Suicide Attempters in China

Crisis ◽  
2010 ◽  
Vol 31 (2) ◽  
pp. 109-112 ◽  
Author(s):  
Hui Chen ◽  
Brian L. Mishara ◽  
Xiao Xian Liu
Keyword(s):  
Pilot Study ◽  
Effective Means ◽  
Text Message ◽  
Text Messages ◽  
Mobile Telephone ◽  
Future Research ◽  
Quick Method ◽  
Suicide Attempters ◽  
To Receive

Background: In China, where follow-up with hospitalized attempters is generally lacking, there is a great need for inexpensive and effective means of maintaining contact and decreasing recidivism. Aims: Our objective was to test whether mobile telephone message contacts after discharge would be feasible and acceptable to suicide attempters in China. Methods: Fifteen participants were recruited from suicide attempters seen in the Emergency Department in Wuhan, China, to participate in a pilot study to receive mobile telephone messages after discharge. All participants have access to a mobile telephone, and there is no charge for the user to receive text messages. Results: Most participants (12) considered the text message contacts an acceptable and useful form of help and would like to continue to receive them for a longer period of time. Conclusions: This suggests that, as a low-cost and quick method of intervention in areas where more intensive follow-up is not practical or available, telephone messages contacts are accessible, feasible, and acceptable to suicide attempters. We hope that this will inspire future research on regular and long-term message interventions to prevent recidivism in suicide attempters.

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