Adaptation of pumps to large head variations, and especially to operation under abnormal heads. Pumps are usually operated at heads other than those giving maximum efficiency, as long as the reduced efficiency at these conditions is still acceptable. The Authors show how the normal operating head range can be extended and improved, and then discuss the possibilities and disadvantages of working at very low discharges and heads, in terms of specific speed.Les pompes sont normalement utilisées pour des hauteurs différentes de celles correspondant à leur point de rendement maximum, dans la mesure où la chute de rendement qui en résulte est acceptable. On montrera tout d'abord comment cette zone de hauteurs normales peut être étendue et amé...
A contribution to the study of the speed governing system for a surge tank-equipped hydroelectric pl...
A hydro-electric power station operator’s views on speed governing problems. The speed governor of ...
Speed variations of pumps have become increasingly popular as the technology to produce variable fre...
Pump design tendencies resulting from higher pressures and heads per impeller. The Authors show how ...
Presentation of pumping turbine test results. A normal turbine cannot work as a pump, but a normal ...
This paper deals with further developments of axial flow pump study which enable us to calculate ind...
In the search for improvements in noise reduction, experiments have been carried out at CETIM on a s...
Some standard applications of the thermodynamic method, especially in connection with model turbines...
Feed pumps in modern thermal power stations. The use of high-pressure boilers with a high evaporatio...
Problems affecting feed pumps used for marine boilers and high-pressure high-superheated thermal pow...
Hydroelectric power units consisting of a horizontal axial flow variable-pitch propeller turbine dri...
The characteristic quantities for long-distance water supply systems and the parameters governing th...
In low-head power schemes with a long diversion channel, a most economical way of avoiding unduly hi...
The same pump is often required to operate at speeds and temperatures differentfrom those at which i...
Comparing NPSH with suction head. Definition and origin of NPSH, Comparing NPSH with suction head....
A contribution to the study of the speed governing system for a surge tank-equipped hydroelectric pl...
A hydro-electric power station operator’s views on speed governing problems. The speed governor of ...
Speed variations of pumps have become increasingly popular as the technology to produce variable fre...
Pump design tendencies resulting from higher pressures and heads per impeller. The Authors show how ...
Presentation of pumping turbine test results. A normal turbine cannot work as a pump, but a normal ...
This paper deals with further developments of axial flow pump study which enable us to calculate ind...
In the search for improvements in noise reduction, experiments have been carried out at CETIM on a s...
Some standard applications of the thermodynamic method, especially in connection with model turbines...
Feed pumps in modern thermal power stations. The use of high-pressure boilers with a high evaporatio...
Problems affecting feed pumps used for marine boilers and high-pressure high-superheated thermal pow...
Hydroelectric power units consisting of a horizontal axial flow variable-pitch propeller turbine dri...
The characteristic quantities for long-distance water supply systems and the parameters governing th...
In low-head power schemes with a long diversion channel, a most economical way of avoiding unduly hi...
The same pump is often required to operate at speeds and temperatures differentfrom those at which i...
Comparing NPSH with suction head. Definition and origin of NPSH, Comparing NPSH with suction head....
A contribution to the study of the speed governing system for a surge tank-equipped hydroelectric pl...
A hydro-electric power station operator’s views on speed governing problems. The speed governor of ...
Speed variations of pumps have become increasingly popular as the technology to produce variable fre...