THOMAS M WALSKI
Engineers in West Nanticoke, PA
License number
Pennsylvania PE039378R
Category
Engineers
Type
Professional Engineer
Address
Address
West Nanticoke, PA 18634
Professional information
Method And System For Automatic Water Distribution Model Calibration
US Patent:
7457735, Nov 25, 2008
Filed:
Jan 17, 2002
Appl. No.:
10/051820
Inventors:
Zheng Yi Wu - Waterbury CT, US
Thomas M. Walski - Nanticoke PA, US
Robert A. Gurrieri - Thomaston CT, US
Gregg A. Herrin - Burlington CT, US
Robert F. Mankowski - Watertown CT, US
Thomas M. Walski - Nanticoke PA, US
Robert A. Gurrieri - Thomaston CT, US
Gregg A. Herrin - Burlington CT, US
Robert F. Mankowski - Watertown CT, US
Assignee:
Bentley Systems, Incorporated - Exton PA
International Classification:
G06G 7/48, G06G 7/50, G01D 18/00, G01D 21/00, G01M 19/00, G01P 21/00, G01R 35/00, G06F 19/00
US Classification:
703 9, 703 10, 702 85
Abstract:
A water distribution model calibration technique is provided that allows a user to design a calibration model by selecting several input parameters desired to be used for the calibration of a model that allows an engineer to collect a complete set of data to represent the overall system conditions at any given time of day. For example, several parameters may be chosen including link status, the pipe roughness coefficient, junction demand, and pipe and valve operational status. Trial solutions of the model calibration are generated by a genetic algorithm program. A hydraulic network solver program then simulates each trial solution. A calibration module runs a calibration evaluation program to evaluate how closely the model simulation is to the observed data.
Method For Optimizing Design And Rehabilitation Of Water Distribution Systems
US Patent:
7593839, Sep 22, 2009
Filed:
Mar 4, 2003
Appl. No.:
10/379353
Inventors:
Zheng Y. Wu - Watertown CT, US
Thomas M. Walski - Nanticoke PA, US
Robert F. Mankowski - Watertown CT, US
Gregg A. Herrin - Burlington CT, US
Wayne R. Hartell - Waterbury CT, US
Jonathan DeCarlo - Oakville CT, US
Benjamin D. Wilson - Keene NH, US
Thomas M. Walski - Nanticoke PA, US
Robert F. Mankowski - Watertown CT, US
Gregg A. Herrin - Burlington CT, US
Wayne R. Hartell - Waterbury CT, US
Jonathan DeCarlo - Oakville CT, US
Benjamin D. Wilson - Keene NH, US
Assignee:
Bentley Systems, Incorporated - Exton PA
International Classification:
G06F 7/60, G06F 17/10, G06G 7/50
US Classification:
703 9, 703 2
Abstract:
A method and system for optimal design of a water distribution network is provided. Three levels of optimization are available as options for selection by the user and these include least cost optimization, maximum benefit optimization and cost-benefit tradeoff optimization. The optimization models, in accordance with the present invention, include solutions generated by a competent genetic algorithm that can take into account multiple objective functions. Pareto-optimal solutions are produced for the whole range of a budget for the water distribution system. Tradeoff solutions allow engineers to apply engineering judgement to choose the true optimal solution under the specific application being considered.
Automatic Parameter Estimation Extension For Variable Speed Pumps
US Patent:
7013248, Mar 14, 2006
Filed:
Mar 22, 2002
Appl. No.:
10/104714
Inventors:
Ezio Todini - Monte S. Pietro, IT
Michael E. Tryby - Thomaston CT, US
Jack S. Cook - Bethlehem CT, US
Thomas M. Walski - Nanticoke PA, US
Robert F. Mankowski - Watertown CT, US
Michael E. Tryby - Thomaston CT, US
Jack S. Cook - Bethlehem CT, US
Thomas M. Walski - Nanticoke PA, US
Robert F. Mankowski - Watertown CT, US
Assignee:
Haestad Methods, Inc. - Waterbury CT
International Classification:
G06G 7/48
US Classification:
703 2, 703 7, 703 9
Abstract:
A method for estimating the relative speed factor parameter for a variable speed pump in a hydraulic network sufficient to maintain a fixed pressure at a control node is provided. A desired operating characteristic is determined and this is inserted into a matrix of equations describing the hydraulic system. The largely symmetrical matrix includes certain aspects of the system representing the variable speed pumps which are non-symmetrical. Non-symmetrical portions of the matrix are separated out and solved using an LU factorization technique. Non-sparse, non symmetric matrices are generated and the difference in head correction is solved for to compute the updated nodal head vector and ultimately determine the variable pump speed parameter. The invention allows estimation of the variable speed factor for a variable speed pump drive sufficient to maintain a fixed pressure at a control node. The system fully integrates variable pump speed operation with the status and control capabilities of known hydraulic network solvers.
Computer Modeling Software For Analysis Of The Criticality Of Elements In A Water Distribution System
US Patent:
8639483, Jan 28, 2014
Filed:
Dec 1, 2006
Appl. No.:
11/607606
Inventors:
Thomas M. Walski - Nanticoke PA, US
Robert F. Mankowski - Watertown CT, US
Shaoyu Yang - Southbury CT, US
Ronghe Wang - Watertown CT, US
Daniel Bishop - Springfield MA, US
Daniel Bowdler - Waterville CT, US
Zheng Yi Wu - Watertown CT, US
Robert A. Gurrieri - Thomaston CT, US
Robert F. Mankowski - Watertown CT, US
Shaoyu Yang - Southbury CT, US
Ronghe Wang - Watertown CT, US
Daniel Bishop - Springfield MA, US
Daniel Bowdler - Waterville CT, US
Zheng Yi Wu - Watertown CT, US
Robert A. Gurrieri - Thomaston CT, US
Assignee:
Bentley Systems, Incorporated - Exton PA
International Classification:
G06G 7/50, G06G 7/48
US Classification:
703 9, 702 51, 702100
Abstract:
A method and system for performing a criticality analysis of a water distribution network is provided. The method and system provides for segmentation of the system which allows a user to determine the set of elements that comprise segments, which in turn are the smallest portion of a water distribution system that can be isolated by valving. Isolating valves are included as elements in the set of elements that are used by an associated hydraulic solver engine to segment the water distribution network. Once the network has been segmented, a criticality analysis is performed whereby a hydraulic simulation is run for an outage of one or more segments, and the shortfall in demand supplied to other segments is calculated. The system provides for a linking of the ability to automatically identify segments with a hydraulic analysis model to enable a user not only to identify segments, but to rank their importance based on a variety of user defined metrics.
System And Method For Pressure-Dependent Demand Optimization For Leakage Detection
US Patent:
8635051, Jan 21, 2014
Filed:
Aug 28, 2009
Appl. No.:
12/550214
Inventors:
Zheng Yi Wu - Watertown CT, US
Paul Sage - Northwich, GB
Thomas M. Walski - Nanticoke PA, US
Wayne R. Hartell - Golden Grove, AU
Kristopher L. Culin - Bristol CT, US
Paul Sage - Northwich, GB
Thomas M. Walski - Nanticoke PA, US
Wayne R. Hartell - Golden Grove, AU
Kristopher L. Culin - Bristol CT, US
Assignee:
Bentley Systems, Incorporated - Exton PA
International Classification:
G06G 7/50
US Classification:
703 9
Abstract:
In one embodiment, a hydraulic simulation model corresponding to a real-world hydraulic network is loaded in a hydraulic modeling and simulation application executing on a computer system. The hydraulic simulation model represents leakages as pressure dependent emitter flow at selected nodes (leakage nodes). Optimization criteria include a specified maximum of possible leakage nodes. A genetic algorithm (GA) generates trial solutions for an optimization, each trial solution representing locations for leakage nodes and corresponding emitter coefficients. A hydraulic analysis is performed for the trial solutions to generated model-simulated results. The model-simulated results are compared to field-observed data for the real-world hydraulic network to generate goodness-of-fit values. The process is repeated until a particular goodness-of-fit value is achieved or a maximum number of iterations is reached. Predicted locations for leakage nodes from a particular selected trial solution are then displayed to a user.
System And Method For Modeling And Simulating Water Distribution And Collection Systems Including Variable Speed Pumps
US Patent:
8265911, Sep 11, 2012
Filed:
Aug 29, 2008
Appl. No.:
12/201529
Inventors:
Zheng Yi Wu - Watertown CT, US
Michael E. Tryby - Cincinnati OH, US
Ezio Todini - Arcidosso, IT
Thomas M. Walski - Nanticoke PA, US
Wayne R. Hartell - Golden Grove, AU
Kristopher L. Culin - Bristol CT, US
Michael E. Tryby - Cincinnati OH, US
Ezio Todini - Arcidosso, IT
Thomas M. Walski - Nanticoke PA, US
Wayne R. Hartell - Golden Grove, AU
Kristopher L. Culin - Bristol CT, US
Assignee:
Bentley Systems, Incorporated - Exton PA
International Classification:
G06G 7/50
US Classification:
703 6
Abstract:
In one embodiment, a technique is disclosed for calculating a relative pump speed factor for attaining a prescribed hydraulic head or for pumping a prescribed amount of flow. A hydraulic model of a water distribution or collection system is defined to include link elements and node elements. At least one of the node elements represents a fixed-flow variable speed pump (VSP) that delivers a desired amount of flow, a variable speed pump battery (VSPB) that represents multiple VSPs operating in parallel with each other, a VSP with a tank located on the VSP's discharge side, or a VSP with a tank located on the VSP's suction side.
Efficient Method For Pressure Dependent Water Distribution Analysis
US Patent:
8175859, May 8, 2012
Filed:
Jul 13, 2007
Appl. No.:
11/777491
Inventors:
Zheng Yi Wu - Watertown CT, US
Thomas M. Walski - Nanticoke PA, US
Rong He Wang - Oakville CT, US
Daniel Bowdler - Waterville CT, US
Thomas M. Walski - Nanticoke PA, US
Rong He Wang - Oakville CT, US
Daniel Bowdler - Waterville CT, US
Assignee:
Bentley Systems, Incorporated - Exton PA
International Classification:
G06G 7/50
US Classification:
703 9
Abstract:
A computer software program provides an algorithm that solves for unknown demands (and junction pressures) within a modeling system that uses a generalized, unified loop-node formulation. The program can be used to calculate the available demand (i. e. , the amount of water that is to be supplied) according to the nodal pressure. Both nodal heads and flows are simultaneously solved using a gradient algorithm, which allows, in accordance with the present invention, the model to simulate situations where a change in pressure affects the quantity of water used. Criticality analyses for segments of a system in such pressure dependent scenarios can also be performed using the software program of the present invention.