scholarly journals “Not Wars, Water pumps”—From emotive to rational language in managing the Covid‐19 pandemic

2020 ◽  
Vol 74 (10) ◽  
Author(s):  
Mike Stedman ◽  
Mark Davies ◽  
Adrian Heald
Keyword(s):  
Rational Language ◽  
Water Pumps

Women and Water-Pumps in Bangladesh

1996 ◽  
Author(s):  
Barbara van Koppen ◽  
Simeen Mahmud
Keyword(s):  
Water Pumps

Paper 15: Recent Research and Development in Truck Engine Cooling

1969 ◽  
Vol 184 (1) ◽  
pp. 117-124 ◽  
Author(s):  
S. R. G. Taylor
Keyword(s):  
Coolant Temperature ◽  
Analytical Prediction ◽  
Cooling Performance ◽  
Pump Speed ◽  
Power Characteristics ◽  
Engine Cooling ◽  
System Pressure ◽  
Component Design ◽  
Additional Resistance ◽  
Water Pumps

To improve economically the cooling performance of trucks an analytical approach was used to assist development. The component tests undertaken included the complete net pressure and power characteristics of two engine water pumps and four engine fans, the heat transfer and pressure drop performances over appropriate flow ranges of some 14 radiators, the additional resistance to air flow offered by two noise shields, and studies of the effects of pump speed, coolant temperature, system pressure, thermostat resistance, and by-pass resistance on radiator water flow with three different engines. The apparatus and methods used for each type of test are outlined. Using the above and other existing data, cooling performance was predicted for some 80 different configurations and conditions, and fan power consumption was predicted for several of these. These results enabled component design and manufacturing problems to be identified and the selection of the most promising configurations for actual development testing. The agreement between the predicted and actual cooling performances is discussed. The use of computer programmes in component testing and analytical prediction is mentioned, and various possible developments in future cooling systems of still higher performance are discussed.

The benefits of induced flow solar powered water pumps

Solar Energy ◽  
2003 ◽  
Vol 74 (1) ◽  
pp. 77-84 ◽  
Author(s):  
T.D Short ◽  
J.D Burton
Keyword(s):  
Induced Flow ◽  
Solar Powered ◽  
Water Pumps

Solar Powered Water Pumps: The Past, the Present—and the Future?

2003 ◽  
Vol 125 (1) ◽  
pp. 76-82 ◽  
Author(s):  
T. D. Short ◽  
R. Oldach
Keyword(s):  
Developing Countries ◽  
Potable Water ◽  
Full Potential ◽  
Clean Water ◽  
Solar Photovoltaic ◽  
The Past ◽  
Water Pumping ◽  
Technical Issues ◽  
Solar Powered ◽  
Water Pumps

Solar (photovoltaic) powered water pumps could be a real instrument for the alleviation of water related deaths and illnesses in developing countries through the provision of clean water. However, despite the benefits that access to sustainable potable water supplies can bring, solar powered water pumps have a long way to go before they even begin to meet the needs of those who could use them. This paper addresses some of the complex, inter-related social and technical issues that have prevented solar powered water pumping from reaching its full potential and shows how future efforts should be directed in order to respond to these issues.

Socio-Technical Modeling to Manage Power Distribution for Microgrid Systems with Limited Production Capacity

2021 ◽  
pp. 1-38
Author(s):  
Hailie Suk ◽  
Ayushi Sharma ◽  
Anand Balu Nellippallil ◽  
Ashok Das ◽  
John Hall
Keyword(s):  
Rural Communities ◽  
Power Distribution ◽  
Production Capacity ◽  
Solution Space ◽  
Decision Makers ◽  
Safety Education ◽  
Water Safety ◽  
Water Safety Education ◽  
Water Pumps

Abstract The quality of life (QOL) in rural communities is improved through electrification. Microgrids can provide electricity in areas where grid access to electricity is infeasible. Still, insufficient power capacity hinders the very progress that microgrids promote. Therefore, we propose a decision-making framework to manage power distribution based on its impact on the rural QOL. Parameters are examined in this paper to represent the QOL pertaining to water, safety, education, and leisure/social activities. Each parameter is evaluated based on condition, community importance, and energy dependence. A solution for power allocation is developed by executing the compromise decision support problem (cDSP) and exploring the solution space. Energy loads, such as those required for powering water pumps, streetlamps, and household devices are prioritized in the context of the QOL. The technique also allows decision-makers to update the power distribution scheme as the dynamics between energy production and demand change over time. In this paper, we propose a framework for connecting QOL and power management. The flexibility of the approach is demonstrated using a problem with varying scenarios that may be time-dependent. The work enables sustainable energy solutions that can evolve with community development.

Calculation of Flow Induced Vibration Amplitudes of Radial Sewage Water Pumps

2003 ◽  
Author(s):  
Friedrich-Karl Benra ◽  
Hans Josef Dohmen ◽  
Oliver Schneider
Keyword(s):  
Transient Flow ◽  
Three Dimensional ◽  
Sewage Water ◽  
Flow Induced Vibration ◽  
Present Contribution ◽  
Unsteady Forces ◽  
Friction Forces ◽  
Pump Shaft ◽  
Water Pumps ◽  
Operating Points

The extreme vibrations of sewage water pumps with single-blade impellers are induced mainly by interaction of the flow in the impeller and the casing. The resulting periodically unsteady forces affect the impeller and produce radial deflections of the pump shaft. These oscillations of the rotor are transferred to the pump casing and attached pipes. They can be recognized as vibrations at the bearing blocks or at the pump casing. The present contribution describes the investigation of the transient flow in a sewage water pump. The three-dimensional, viscous, unsteady flow in a pump with a single blade impeller is determined by numerical simulation. After that the hydrodynamic stimulation forces are calculated from the so known transient flow field. The forces can be classified into pressure and friction forces. The pressure forces usually exceed the friction forces on several orders of magnitude. A separate view on the fluid-wetted impeller surfaces shows that the pressure forces acting on the blade are clearly larger than the forces at the hub and at the shroud. So they are decisive for the vibration amplitudes of single-blade sewage water pumps. By a following dynamic analysis of the pump rotor using a commercial Finite-Element-Method (FEM) the resulting vibration amplitudes are determined for several operating points. With the known pressure field and the calculated vibration amplitudes the vibration behavior of sewage water pumps can be influenced during the design by changing the relevant construction parameters.

Vibrating carbon nanotubes as water pumps

Nano Research ◽  
2010 ◽  
Vol 4 (3) ◽  
pp. 284-289 ◽  
Author(s):  
Hu Qiu ◽  
Rong Shen ◽  
Wanlin Guo
Keyword(s):  
Carbon Nanotubes ◽  
Water Pumps
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