The Thames Water Ring Main: Mechanical and Electrical Installations

1996 ◽  
Vol 10 (1) ◽  
pp. 10-16 ◽  
Author(s):  
R. P. F. Went ◽  
A. D. Ricketts ◽  
H. McDonald
Keyword(s):  
Water Ring

Experimental determination of pressure in VVN2-50 water ring pump

1987 ◽  
Vol 23 (11) ◽  
pp. 561-562
Author(s):  
S. I. Bogomolov ◽  
V. P. Semenov ◽  
N. D. Gaidar ◽  
A. N. Lomakin ◽  
M. M. Smirnov
Keyword(s):  
Experimental Determination ◽  
Water Ring

Rip current rescues on unguarded beaches

Shore & Beach ◽  
2021 ◽  
pp. 41-45
Author(s):  
Aubrey Litzinger ◽  
Stephen Leatherman
Keyword(s):  
Young Person ◽  
Red Cross ◽  
Rip Current ◽  
Rip Currents ◽  
Water Ring ◽  
The U.S

Rip currents are the greatest danger at surf beaches. Professional lifeguards rescue tens of thousands of people every year at U.S. beaches, but only a small percentage of the nation’s beaches are guarded. Oftentimes it is a young person who is caught in a rip current, and a bystander will attempt a rescue without a flotation device. The U.S. Lifesaving Association strongly suggests that this kind of rescue should not be undertaken because too often the rescuer will drown. Some coastal towns such as Cocoa Beach in Florida are now posting ring buoys on their unguarded beaches with the warning to throw, but not to go into the water. Ring buoys of two different weights were tested for efficiency when thrown in terms of distance and accuracy. The participants threw the ring buoys two different ways: one way of their choosing (un-instructed) and second by Red Cross recommendation (instructed). The buoyancy was also tested for each buoy. While these flotation devices have some merit, they clearly have limitations.

DISCUSSION. LONDON WATER RING MAIN.

1990 ◽  
Vol 88 (1) ◽  
pp. 133-148
Author(s):  
WJ DICKENS ◽  
IH BENSTED ◽  
RN CRAIG ◽  
LO WILD ◽  
WJF RAY ◽  
...  
Keyword(s):  
Water Ring

Hydraulic analysis of a water-ring air blower in a combined dust-collection system

2007 ◽  
Vol 43 (1-2) ◽  
pp. 102-105
Author(s):  
L. A. Tarasova ◽  
S. A. Kanerva ◽  
O. A. Troshkin
Keyword(s):  
Hydraulic Analysis ◽  
Collection System ◽  
Dust Collection ◽  
Air Blower ◽  
Water Ring

Modeling of Characteristics of Water-Ring Vacuum Pumps

2019 ◽  
pp. 70-77 ◽  
Author(s):  
N.L. Velikanov ◽  
V.A. Naumov
Keyword(s):  
Mathematical Modeling ◽  
Physical Models ◽  
Hydraulic Calculation ◽  
Suction Pressure ◽  
Gas Compression ◽  
Physical And Mathematical Modeling ◽  
Empirical Coefficients ◽  
Isothermal Gas ◽  
Pumping Units ◽  
Water Ring

Physical and mathematical modeling of characteristics of water-ring vacuum pumps has a number of specific features. Isothermal efficiency, i.e. the ratio of the isothermal gas compression power to the pump power consumed is used as an efficiency indicator. The article describes the existing methods of hydraulic calculation of pumping units. An analysis of physical models, numerical values of empirical coefficients is carried out. An improved algorithm for calculating water-ring vacuum pumps of different manufacturers in the framework of previously developed models is presented. The calculations of compressors manufactured by ZAO Beskom (VVN-3, VVN1-6, VVN1-12) and ERSTVAK (ELRS-45, ELRS-57) are considered as examples. The results of tests of vacuum pumps published by the manufacturers in the open press are used as the initial data for the calculations. The experimental dependences of the performance, power expended, isothermal efficiency of water-ring vacuum pumps on the suction pressure are presented. The results obtained make it possible to improve the accuracy and reliability of predicting the amount of displaced liquid or steam during the operation of the pumping unit.

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