Dynamic decompression control for high pressure seals

Patent metadata

Field	Value
Publication number	US-10014537-B2
Application number	US-201815875458-A
Country	US
Kind code	B2
Filing date	Jan 19, 2018
Priority date	Jul 23, 2013
Publication date	Jul 3, 2018
Grant date	Jul 3, 2018

Abstract

The present disclosure is directed to a method and system for dynamically controlling seal decompression. The method includes monitoring a set of parameters associated with an operation of a seal, wherein the set of parameters includes a maximum pressure subjected to the seal and an exposure time at the maximum pressure, calculating a target pressure ramp down rate based on at least one of the maximum pressure and the exposure time, and decreasing a pressure about the seal at a decompression rate that is based on the target pressure ramp down rate. The system includes a controller having a memory device, a graphical user interface, at least one pressure transmitter configured to monitor the pressure about the seal, and a processor, wherein the processor is configured to detect a maximum exposure pressure and exposure time at maximum pressure about the seal and control a pressure ramp down about the seal based on the maximum exposure pressure and the exposure time detected in order to prevent explosive decompression of the seal.

First claim

What is claimed is:

1. A system for dynamically controlling decompression for an electrochemical cell comprising:
an electrochemical cell; and
a controller, wherein the controller is configured to detect maximum exposure pressure and exposure time at maximum pressure for a seal of the electrochemical cell and control a pressure ramp down of the electrochemical cell based on the maximum exposure pressure and the exposure time detected in order to prevent explosive decompression of the seal.

2. The system of claim 1 , wherein the control of the pressure ramp down is further based on the materials of construction of the seal.

3. The system of claim 2 , wherein at least a portion of the materials of construction of the seal includes EPDM, Viton, nylon, valox, polycarbonate, silicone, polyethylene, polypropylene, polyurethane, polyethylene terephthalate, and/or polyethylene naphthalate.

4. The system of claim 1 , wherein the control of pressure ramp down is further based on at least one of a gas source supplying the electrochemical stack, hydrogen partial pressure in the gas source, temperature of the gas source, humidity in the gas source, the seal thickness, the seal geometry, and/or the seal age.

5. The system of claim 1 , wherein the electrochemical cell is configured to operate at an operating pressure ranging from about 0 psi to about 15,000 psi.

6. The system of claim 3 , wherein the environment about the seal contains hydrogen.

7. A system for dynamically controlling seal decompression of a seal located in a pressurized environment, the system comprising:
a controller comprising:
a memory device, a graphical user interface, at least one pressure transmitter configured to monitor the pressure about the seal, and a processor;
wherein the processor is configured to detect a maximum exposure pressure and exposure time at maximum pressure about the seal and control a pressure ramp down about the seal based on the maximum exposure pressure and the exposure time detected in order to prevent explosive decompression of the seal.

8. The system of claim 7 , wherein the control of the pressure ramp down is further based on the material of construction of the seal.

9. The system of claim 8 , wherein at least a portion of the material of construction of the seal is formed of EPDM, Viton, nylon, valox, polycarbonate, silicone, polyethylene, polypropylene, polyurethane, polyethylene terephthalate, and/or polyethylene naphthalate.

10. The system of claim 7 , wherein the control of the pressure ramp down is further based on at least one of a gas source supplying the pressurized environment, hydrogen partial pressure in the gas source, temperature of the gas source, humidity in the gas source, the seal thickness, the seal geometry, and/or the seal age.

11. The system of claim 7 , wherein the pressurized environment about the seal contains hydrogen.

Assignees

• Nuvera Fuel Cells Llc

Inventors

• Blanchet Scott

Classifications

• C25B1/12

  Chemistry & Metallurgy · mapped topic

• C25B15/02

  Process control or regulation · CPC title

• H01M8/0438 Primary

  Pressure; Ambient pressure; Flow · CPC title

• Y02E60/366

  Cross-Sectional Technologies · mapped topic

• H01M8/04298

  Processes for controlling fuel cells or fuel cell systems · CPC title