 Image processing unit, image processing system using the same, and image processing method |
| The present invention has been made in view of the above circumstances, and it is an object of the ... |
|
| Women's under garment with separator panel |
| OF THE PREFERRED EMBODIMENT(S) OF THE INVENTION As has been mentioned, the present invention ... |
|
| Feature ratio method for computing software similarity |
| What is claimed is: 1. In a computer system operating with computer system software including at ... |
|
| Determining the actual class of an object at run time |
| To achieve the foregoing, and in accordance with the purpose of the present invention, dynamic cast ... |
|
| Method, system, and computer program product for visualizing data using partial hierarchies |
| As discovered by the inventor, what is needed is a method and system for generating a partial ... |
|
| Image forming apparatus with improved warning indication for plurality of troubles |
| One object of the present invention is to indicate accurately a warning for a trouble in an image ... |
|
| Method and apparatus for displaying mode setting information |
| It is an object of the present invention to provide an operation mode setting device and method ... |
|
| Directing image capture sequences in a digital imaging device using scripts |
| The present invention provides a method and system for controlling user interaction in a digital ... |
|
| Parallel computer system providing multi-ported intelligent memory |
| Our invention deals with the use of a computing system device providing a multi-ported intelligent ... |
|
|
Monitor and control for a multi-pump system
| Details |
Inventors: Rishel, James B.;
Assignee: Systecon, Inc. (Cincinnati, OH)
Primary Examiner: Lall; Parshotam S.
Assistant Examiner: Mattson; Brian M.
Attorney, Agent or Firm: Wood, Herron & Evans
A method and apparatus for monitoring and controlling a multi-pump system is described wherein wire-to-water efficiency (W) is accurately determined according to the formula W=(Q.times.HS/K.times.E) wherein Q is flow through the system, HS is total dynamic head across the inlet and outlet headers of the system, E is energy input to the system to drive the pump, and K is a predetermined conversion factor. The pumps of the system are selectively energized and deenergized as the efficiency W varies above and/or below efficiency setpoints so as to optimize the efficiency of the pumping system. |
|
DETAILED DESCRIPTION The method and apparatus provided by the present invention are believed to overcome the above drawbacks.
In particular, with the method and apparatus of the present invention, only one set of pump head transducers need be employed.
Further, a fudge factor is not necessary yet wire-to-water efficiency may be more accurately determined in a multi-pump system than is believed to have been heretofore accomplished.
Moreover, with the method and apparatus of the present invention, selected pumps within a pumping system may be selectively energized and deenergized according to the accurately determined wire-to-water efficiency whereby to operate the pumping system more efficiently.
Thus, in accordance with the present invention and in its broadest aspect, an apparatus and method for monitoring a pumping system is provided in which the wire-to-water efficiency of the system is determined with regard to the total dynamic head HS (i.
e.
, from inlet to outlet header) rather than with regard to a heretofore utilized pump head H.
Thus, in the present invention, only one head or differential pressure measurement is taken which includes any system losses due to fittings and valves and the like between the headers and does not rely upon errorinducing assumption in arriving at an accurate determination of wire-to-water efficiency.
The inclusion of system losses is important because such losses are not constant but may vary with the number of pumps energized even at a given flow or total dynamic head.
Thus, failure to include such losses in the actual wire-to-water efficiency determination may have led to erroneous data from which to design and/or control pumping systems.
Also, because accurate wire-to-water efficiency determinations may now be made with one set of pump head transducers, the cost and complexity of multiple transducer monitoring is eliminated.
With particular reference to the present invention, wire-to-water efficiency may now be accurately determined by the formula: W=(Q
|
|
Graphic Cards 
