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Natural Gas Pipeline
PowerVerde Inc. a Delaware corporation based in Arizona has developed, patented and
tested a unique electrical generation system that utilizes the excess, wasted pressure
along natural gas pipelines, at well-
PowerVerde has contracted Global Machine Works (GMW), located in Arlington, WA www.globalmachineworks.com to manufacture the systems. GMW produces components and parts for companies like Boeing, Bell Helicopter, Cessna, Bombardier, Air Bus and many other aerospace firms. GMW is also certified ISO 9000 which insures all components are manufactured and assembled meeting exacting quality control standards. Presently, the extensive natural gas pipeline systems in the United States and around the world waste tremendous amounts of energy that could be used to generate megawatts of electricity. In 2008, the Interstate Natural Gas Association of America (INGAA) published a study titled: Waste Energy Recovery Opportunities for Interstate Natural Gas Pipelines.
Waste Energy Recovery Opportunities for Interstate Natural Gas Pipelines
The study concluded that tremendous amounts of electricity could be produced utilizing the pressure drop that occurs along the natural gas pipelines where the pressure must be stepped down to deliver the natural gas to customers. At present, that pressure drop is accomplished by stepping down the pressure by mechanical means. That type of system does not recapture any of the energy that was used to pump up the pressure at the many pumping stations located along the natural gas pipeline.
This 2008 study shows the tremendous potential of utilizing the wasted pressure letdown process that is currently used at “City Gates” and other pressure letdown locations along NG pipelines.
The study focused on “Turbo Expanders” as the rotating power source to generate electricity and the problems encountered by those turbines including:
The NGRPGSCC is a Real-
Select Unit Area
The Select Unit portion of the NGRPGSCC allows operations to monitor, at a very high level, the status of all units within their control. The NGRPGSCC is monitoring the activity of each unit and summarizes that information into a single health condition. Depending on the condition of the unit, the indicator will display the unit identifier in white— unit off, green, all statuses are good and the unit is in operation; yellow, one or more systems are out of condition, over limit or trending to failure, and red, imminent failure or failed unit. The list is in floating order with all red units first, yellow next, then green and finally white.
Open Unit Area
When a Unit is selected from the select unit area the unit is opened for all information to be displayed by the NGRPGSCC. An operator can have multiple units open at any given time and can jump to the detail of each, as required.
The Watch control allows the user to monitor the fleet for a period of time that the operator is out of the office or in a meeting. When the Watch is reset the system records any unit that changed to a less than optimal condition. When the operator returns the number of units that went out of condition is displayed along with the times. The user can then quickly review these units by selecting the view button.
When a Unit is selected the Dashboard, location map and unit detail windows are opened. The Dashboard is a summation of each of the critical subsystems of the unit. This notifies the operator which systems the problem is being generated from and what the level of criticality of the problem. Green shows the given subsystem is reporting good, yellow is an indication that a problem is developing in that subsystem, and a red color indicates a failed or failing subsystem component.
Map Window Display
The map window displays the current location of the unit selected. This map can be zoomed in and out from a continental view down to a city level and even to the address level.
Information Tab Area
The information tabs are arranged to provide maximum information in a limited area. The tabs are organized by information type and can be quickly selected for the information required.
Unit Overview Tab
The Unit Overview tab provides graphical information specific to the selected unit
Data Detail Tab
The data detail tab lists all active (non event) data that can be monitored from the unit such as temperature, RPM, etc. Each entry displays last known value and the minimum and maximum recorded along with a time stamp of when it occurred. An added feature allows the limits to be reset if more direct monitoring over a time period is required.
Plot Data Tab
This display allows the operator to plot individual data elements over time to look for trending or behavior indicators. This tab contains contact information and company, division and unit descriptions along with contact information.
The Incidents tab keeps a record of events to track unit and even company wide incidents. These could be failures and the like. The view button allows the operator to investigate the incidents as to type and severity.
The log tab records any event or code generated by the unit. This can be any of the codes the NGRPGSCC is monitoring.
Overview Map: The overview map provides a larger area map
Unit: This selection allows the operators to toggle back to the unit monitoring from the large map display or the Log file
Log: The Log display records a summary of all events from all the units being monitored.
Requirements on how data should be received, processed, and stored in the DCC database.
Unit Location, Description
Unit Location LAT/LON
Gas leak sensor and alarm
Pressure at input port of motor
Temp at input of motor
Pressure at output of motor
Temp at output port of motor
RPM of Generator
Voltage out at Generator
Amps out at Generator
Temp of Generator
Flow rate in cu/ft/min at input of motor
NGPGS Control Center (NGRPGSCC)
Advantages of PowerVerde System
Manufacturing and Testing
Global Machine Works, an aerospace ISO 9000 certified facility has been contracted
to be the Prime Contractor. In addition, several other companies are sub-
Actual Manufacturing at Global Machine Works of PowerVerde 100KW System Makino a-
The study concluded that “Power purchase prices that recognize and reward clean energy productions would greatly enhance the economic viability of turbo expander systems.
The study also concluded that there are no commercially available systems that have overcome the problems associated with pressure letdowns. After extensive research and development, PowerVerde’s patented electrical generation systems have overcome those problems by:
PowerVerde has developed and patented a unique system for generating megawatts of electricity on existing natural gas pipeline systems. These unique systems will be able to generate huge amounts of electricity without burning or otherwise using any of the gas or disrupting the flow of the natural gas to customers.
The PowerVerde system uses the high pressure of the natural gas in the pipelines
where the pressure needs to be dropped to deliver to customers. Presently, the pressure
drop is accomplished by throttling down the pressure by mechanical means. That process
wastes the latent potential of the natural gas to produce electrical energy. The
payoff bonus is that all of the electrical energy potential can be produced without
emitting any pollutants or adding any carbon dioxide to the atmosphere. In essence,
after the initial cost of installation and low maintenance costs, the electricity
generated is free and non-
The cold natural gas that exits the exhaust side of the motor is passed through a heat exchanger to cool the generator, resulting in a 20% increase in output of the generator on hot days. We believe this extra electrical production means that the installed cost per kW hour will be even less in hot climates.
This illustration shows the PowerVerde systems installed on a typical natural gas pipeline.
System Monitoring and Website
Natural Gas Renewable Power Generation System Control Center & Data Consolidation Center
RA Natural Gas Renewable Power Generation System Control Center NGRPGSCC
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