Reversible Pump-Turbines for Sir Adam Beck-Niagara Pumping-Generating Station

1959 ◽  
Vol 81 (4) ◽  
pp. 521-529 ◽  
Author(s):  
P. Deriaz ◽  
J. G. Warnock
Keyword(s):  
Mechanical Design ◽  
Hydraulic Characteristics ◽  
Design Features ◽  
Pump Turbine ◽  
Storage Scheme ◽  
New Machine

The paper describes the origin of the new machine and its application to the storage scheme at Sir Adam Beck-Niagara where it operates as a reversible pump-turbine. Description is given of its hydraulic characteristics and of some of the more important mechanical design features.

Design of a Human Knee Reeducation Mechanism

2019 ◽  
Vol 11 (1) ◽  
pp. 42-53
Author(s):  
Allaoua Brahmia ◽  
Ridha Kelaiaia
Keyword(s):  
Lower Limb ◽  
Mechanical Design ◽  
Kinematic Chain ◽  
Lower Limbs ◽  
Kinematic Structure ◽  
Robotic Device ◽  
Human Knee ◽  
Kinematic Study ◽  
Rehabilitation Exercise ◽  
New Machine

Abstract To establish an exercise in open muscular chain rehabilitation (OMC), it is necessary to choose the type of kinematic chain of the mechanical / biomechanical system that constitutes the lower limbs in interaction with the robotic device. Indeed, it’s accepted in biomechanics that a rehabilitation exercise in OMC of the lower limb is performed with a fixed hip and a free foot. Based on these findings, a kinematic structure of a new machine, named Reeduc-Knee, is proposed, and a mechanical design is carried out. The contribution of this work is not limited to the mechanical design of the Reeduc-Knee system. Indeed, to define the minimum parameterizing defining the configuration of the device relative to an absolute reference, a geometric and kinematic study is presented.

The Effect of Water Injection for Emissions Control on Industrial Gas Turbine Combustors

1984 ◽  
Author(s):  
R. J. Antos ◽  
W. C. Emmerling
Keyword(s):  
Gas Turbines ◽  
Mechanical Design ◽  
Water Injection ◽  
Combustion Process ◽  
Liquid Fuels ◽  
Nox Emissions ◽  
Design Features ◽  
Industrial Gas Turbines ◽  
Comprehensive Test ◽  
Industrial Gas Turbine

One common method of reducing the NOx emissions from industrial gas turbines is to inject water into the combustion process. The amount of water injected depends on the emissions rules that apply to a particular unit. Westinghouse W501B industrial gas turbines have been operated at water injection levels required to meet EPA NOx emissions regulations. They also have been operated at higher injection levels required to meet stricter California regulations. Operation at the lower rates of water did not affect combustor inspection and/or repair intervals. Operation on liquid fuels with high rates of water also did not result in premature distress. However, operation on gas fuel at high rates of water did cause premature distress in the combustors. To evaluate this phenomenon, a comprehensive test program was conducted; it demonstrated that the distress is the result of the temperature patterns in the combustor caused by the high rates of water. The test also indicated that there is no significant change in dynamic response levels in the combustor. This paper presents the test results, and the design features selected to substantially improve combustor wall temperature when operating on gas fuels, with the high rates of water injection required to meet California applications. Mechanical design features that improve combustor resistance to water injection-induced thermal gradients also are presented.

Mechanical Design of the Jasper Mobile Manipulator

2008 ◽  
Author(s):  
Darrin Willis ◽  
Scott B. Nokleby ◽  
Remon Pop-Iliev
Keyword(s):  
Robot Manipulator ◽  
Mechanical Design ◽  
Degree Of Freedom ◽  
Mobile Manipulator ◽  
Design Features ◽  
Coupling Device ◽  
Mobile Base

This paper describes the mechanical design and analysis of a mobile-manipulator system comprised of a robot manipulator and a mobile base. The combination of the two is known as a mobile manipulator and combines the maneuverability of the mobile base with the accuracy of the robot manipulator. The mechanical design of a new mobile-manipulator system with the robot manipulator mounted on the front is discussed. The device features an innovative 2-DOF (degree-of-freedom) parallelogram coupling device that allows the base of the robot manipulator to translate vertically and roll longitudinally relative to the mobile base. The coupling device has dampers to reduce the vibrations caused by the motion of the mobile base on the robot manipulator and vice versa. The design features the use of omni-wheels that eliminate the problems inherent with traditional caster wheels.

Deriaz Type Reversible Pump-Turbine Installation at Sir Adam Beck-Niagara Forebay Pumped Storage Project

1959 ◽  
Vol 81 (4) ◽  
pp. 505-515
Author(s):  
A. E. Aeberli
Keyword(s):  
Mechanical Design ◽  
Operating Conditions ◽  
Pump Turbine ◽  
Niagara River ◽  
Performance Requirements ◽  
Start Up ◽  
Pumped Storage ◽  
Tail Water ◽  
Power Project ◽  
Turbine Installation

This paper describes the new adjustable blade, single-speed, vertical, single-runner reversible pump-turbine units recently developed and placed into service at Ontario Hydro’s forebay storage pumping-generating station at the S.A.B. Power Project on the Niagara River. The units operate under unusual variations in head. In the pumping sequence the limits are 59 and 90 ft and in the turbine cycle from 45 to 85 ft. Tailwater depression is not required on start-up. Change-over from turbine to pumping sequence is accomplished in a matter of minutes and occurs several times each day. Data are given on the performance requirements for capacity and efficiency versus hydraulic operating conditions of head, tail water, and forebay reservoir levels. Information in the paper includes unusual features of mechanical design.

Effect of interface condition on the hydraulic characteristics of a pump-turbine at various guide vane opening conditions in pump mode

2020 ◽  
Vol 154 ◽  
pp. 986-1004 ◽  
Author(s):  
Jun-Won Suh ◽  
Seung-Jun Kim ◽  
Jin-Hyuk Kim ◽  
Won-Gu Joo ◽  
Jungwan Park ◽  
...  
Keyword(s):  
Guide Vane ◽  
Interface Condition ◽  
Hydraulic Characteristics ◽  
Pump Mode ◽  
Pump Turbine
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