Leak detection systems and methods

• US 20070051166A1
• Filed: 09/02/2005
• Published: 03/08/2007
• Est. Priority Date: 09/02/2005
• Status: Abandoned Application

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Beitelmal, Abdlmonem, Baker, Kenneth
• Application Number:
  US11/219,040
• Publication Number:
  US 20070051166A1
• Time in Patent Office: Days
• US Class Current: 73/40.50R
• CPC Class Codes: G01M 3/188 for radiators

Abstract

Systems, methodologies, and other embodiments associated with fluid leak detection are described. One exemplary system embodiment includes a leak detection jacket that is configured to change properties when contacted by fluid.

Claims

1. A leak detection system for a system that includes fluid communication tubes configured to transport a fluid to and from one or more heat exchangers positioned adjacent to one or more electrical components within the system, where the fluid communication tubes are connected to one or more connection ports, the leak detection system comprising:

a leak detection jacket disposed co-axially around the one or more connection ports, the leak detection jacket being configured with electrical properties that are changed by contact with fluid; and

a control logic operably connected to selected leak detection jackets, the control logic being configured to detect a fluid leak at the one or more connection ports by detecting a change in the electrical properties of a selected leak detection jacket.

2. The system of claim 1, the control logic being configured to detect a change in capacitance in the leak detection jacket.

3. The system of claim 1, where the leak detection jacket comprises two electrically conductive layers separated by a dielectric layer, the two electrically conductive layers and the dielectric layer being axially disposed around portions of the fluid communication tubes and the one or more connection ports.

4. The system of claim 1, where the leak detection jacket is configured as a containment jacket around a connection port.

5. The system of claim 1 further comprising:

one or more valves operably connected to the fluid communication tubes where the one or more valves are electrically controlled to allow or prohibit flow of the fluid; and

the control logic being configured to automatically shut off a selected valve from the one or more valves in response to detecting a fluid leak at a corresponding leak detection jacket.

6. The system of claim 1, the control logic being configured to identify a location of the fluid leak based on identifying which of the leak detection jackets exhibits the change in its electrical properties.

7. The system of claim 1 where the system is operably connected to a computer rack that contains the computing system, and where the one or more electrical components include one or more processors.

8. The system of claim 1 where the leak detection jacket extends beyond the connection port and is formed integral with at least a portion of the fluid communication tube.

9. The system of claim 1 where the controller is configured to transmit a signal to the computing system that causes the computing system to safely shut-down electrical components that are affected by the fluid leak in response to a detected fluid leak.

10. The system of claim 1 where the system is configured within an object that contains the system, the object being a motor vehicle, an aircraft, a spacecraft, a ship, or a building.

11. A system, comprising:

a fluid recirculation system comprising fluid tubing for carrying a fluid, a pump for pumping the fluid through the fluid tubing, and a system heat exchanger connected to the fluid tubing for exchanging heat with the fluid, the fluid tubing defining an input path into the heat exchanger and an output path from the heat exchanger;

a computer equipment cabinet configured with a plurality of servers, and including at least one fluid input port and at least one fluid output port for connecting with the fluid tubing of the fluid recirculation system;

a component heat exchanger configured to exchange heat between one or more electronic components within a server and the fluid, where the fluid tubing connects the component heat exchanger to the at least one fluid input port and the at least one fluid output port;

a port wrap being fluid permeable and being wrapped around selected ports from the at least one fluid input port and the at least one fluid output port, the port wrap being configured with at least two electrically conductive layers separated by a dielectric layer; and

a control logic operably connected to the electrically conductive layers of the port wrap, the control logic being configured to measure an electrical property using the two electrically conductive layers where a change in the electrical property is indicative of a fluid leak.

12. The system of claim 11 where the port wrap further includes an outer layer that is fluid impermeable.

13. The system of claim 11 where the port wrap extends around the selected port and along a portion of the fluid tubing connected to the selected port.

14. The system of claim 11 where the control logic is configured to compare the measured electrical property of the two conductive layers to a predetermined value that represents a dry condition.

15. The system of claim 11 further including a communication interface operably connected to the control logic where the control logic is configured to generate an alert signal when the fluid leak is detected and the communication interface is configured to transmit the alert signal to a server that is associated with the fluid leak.

16. The system of claim 11 where each of the port wraps are identifiable by the control logic such that the control logic is configured to determine a location of the fluid leak by identifying the port wrap having the change in the electrical property.

17. The system of claim 16 where the control logic is configured to transmit an alert signal to an identified server based on the location of the fluid leak, and causing the identified server to safely shutdown affected components.

18. The system of claim 16 further including one or more fluid valves positioned along the fluid tubing, the control logic being configured to cause the one or more fluid values to close based on the location of the fluid leak.

19. The system of claim 11 where the port wrap is a jacket co-axially disposed around the selected ports.

20. The system of claim 11 where the electrical property is capacitance, resistance, impedance, or voltage.

21. The system of claim 11 where the system is operably configured within a motor vehicle, an aircraft, a spacecraft, a ship, or a building.

22. A method, comprising:

flowing a fluid through tubing connected to a heat exchanger, the tubing being connected to one or more locations at connection ports;

sensing a fluid leak at a selected connection port using a jacket that surrounds the selected connection port, the jacket having electrically conductive portions and being fluid permeable where upon contact with the fluid, an electrical property of the jacket is changed;

measuring the electrical property of the jacket; and

determining whether fluid has contacted the jacket based on a change in the electrical property which indicates a fluid leak.

23. The method of claim 22 where the measuring includes measuring a change in capacitance as the electrical property.

24. The method of claim 22 where the determining includes comparing the measured electrical property with a predetermined value for the electrical property to determine if a change has occurred.

25. A tube for carrying a fluid for a heat exchanger, the tube comprising:

an elongated tube body defining an internal fluid path for allowing a fluid to flow therethrough;

a first electrically conductive layer enclosing at least a portion of the elongated tube body;

a dielectric layer disposed around the first electrically conductive layer;

a second electrically conductive layer disposed around the dielectric layer;

the first electrically conductive layer and the second electrically conductive layer being configured to connect to a sensing circuit configured to sense a capacitance change between the first and second electrically conductive layers due to a fluid leak from the tube that contacts the first electrically conductive layer.

26. A leak detection system for a computing system that includes fluid communication tubes configured to transport a fluid to and from one or more heat exchangers positioned adjacent to one or more electrical components within the computing system, where the fluid communication tubes are connected to one or more connection ports, the leak detection system comprising:

a means for absorbing a fluid, the means for absorbing being disposed co-axially around the one or more connection ports, the means for absorbing being configured with electrical properties that are changed by contact with a fluid; and

a means for detecting a leak being operably connected to selected means for absorbing a fluid, the means for detecting being configured to detect a fluid leak at the one or more connection ports by detecting a change in the electrical properties of a selected means for absorbing a fluid.

27. The leak detection system of claim 26 where the means for absorbing includes one or more pairs of electrically conductive layers separated by a dielectric layer.

28. The leak detection system of claim 26 where the fluid is a liquid.