Plate-fin heat exchanger fouling identification

Patent metadata

Field	Value
Publication number	US-2016356677-A1
Application number	US-201615168741-A
Country	US
Kind code	A1
Filing date	May 31, 2016
Priority date	Jun 8, 2015
Publication date	Dec 8, 2016
Grant date	—

Abstract

A computer-implemented method for designing a built-in test is described. The method includes receiving, via a processor, a subsystem model including system parameters for a heat exchanger, wherein each of the system parameters includes a sensor variance; determining, via the processor, a test design vector based on one or more of the system parameters; and designing, via the processor, the built-in test based on the test design vector.

First claim

What is claimed is:

1 . A computer-implemented method for designing a built-in test comprising:
receiving, via a processor, a subsystem model including system parameters for a heat exchanger, wherein each of the system parameters includes a sensor variance; determining, via the processor, a test design vector based on one or more of the system parameters; and designing, via the processor, the built-in test based on the test design vector.

2 . The computer-implemented method of claim 1 , wherein determining the test design vector comprises:
assessing an input uncertainty; assessing, via the processor, the sensor variance for each of the system parameters; and assessing, via the processor, a system model error.

3 . The computer-implemented method of claim 2 , wherein determining the test design vector further comprises restricting, via the processor, an upper bound and a lower bound to each of the system parameters.

4 . The computer-implemented method of claim 1 , wherein the system parameters comprise a thermal fouling resistance, a moisture content, an inlet pressure and a mass flow.

5 . The computer-implemented method of claim 1 , further comprising:
determining, via the processor, a precision value for the designed built-in test; comparing, via the processor, the anticipated precision value for the designed built-in test with a predetermined precision threshold benchmark; and redesigning, via the processor, a second built-in test responsive to determining that the precision value does not meet or exceed the predetermined precision threshold benchmark.

6 . The computer-implemented method of claim 5 , wherein redesigning the second built-in test comprises altering, via the processor, at least one sensor variance.

7 . A system for designing a built-in test comprising:
at least one sensor configured for sensing one or more system parameters of a heat exchanger; and a processor configured to:
receive a subsystem model including system parameters for the heat exchanger, wherein system parameters include a sensor variance;
determine a test design vector based on one or more of the system parameters and allowable input variance; and
design the built-in test based on the test design vector.

8 . The system of claim 7 , wherein the processor is configured to:
assess, via a processor on an aircraft, an input uncertainty; assess, via the processor on the aircraft, the sensor variance for each of the system uncertain parameters and inputs; assess, via the processor on the aircraft, a system model error; and determine, via the processor on the aircraft, the test design vector based on the input uncertainty, the sensor variance, the variance of each of the system parameters, and the system model error.

9 . The system of claim 8 , wherein determining the test design vector further comprises restricting, via the processor, an upper bound and a lower bound to each of the system parameters.

10 . The system of claim 7 , wherein the system parameters comprise a thermal fouling resistance, a moisture content, an inlet pressure and a mass flow.

11 . The system of claim 7 , wherein the processor is further configured to:
determine a precision value for the built-in test; compare the precision value for the built-in test with a predetermined precision threshold benchmark; and redesign a second built-in test responsive to determining that the precision value does not meet or exceed the predetermined precision threshold benchmark.

12 . The system of claim 11 , wherein the processor is configured to redesign the second built-in test by altering at least one sensor variance.

13 . A computer program product for designing a built-in test, the computer program product comprising a computer readable storage medium having program instructions embodied therewith, wherein the computer readable storage medium is not a transitory signal per se, the program instructions executable by a processor operatively connected to at least one sensor to cause the processor to perform a method comprising:
receiving, via the processor, a subsystem model including system parameters for a heat exchanger, wherein each of the system parameters includes a sensor variance; determining, via the processor, a test design vector based on one or more of the system parameters; and designing, via the processor, the built-in test based on the test design vector.

14 . The computer program product of claim 13 , wherein determining the test design vector comprises:
assessing an input uncertainty; assessing, via the processor, the sensor variance for each of the system parameters; and assessing, via the processor, a model error.

15 . The computer program product of claim 14 , wherein determining the test design vector further comprises restricting, via the processor, an upper bound and a lower bound to each of the system parameters.

16 . The computer program product of claim 13 , wherein the system parameters comprise a thermal fouling resistance, a moisture content, an inlet pressure and a mass flow.

17 . The computer program product of claim 13 , further comprising determining, via the processor, a precision value for the built-in test;
comparing, via the processor, the precision value for the built-in test with a predetermined precision threshold benchmark; and redesigning, via the processor, a second built-in test responsive to determining that the precision value does not meet or exceed the predetermined precision threshold benchmark.

18 . The computer program product of claim 17 , wherein redesigning the second built-in test comprises altering, via the processor, at least one sensor variance.

Assignees

• Hamilton Sundstrand Corp

Inventors

• Bollas George M
• Palmer Kyle
• Prasad Dilip
• Jacobson Clas A
• Maljanian Jr John M
• Poisson Richard A
• Park Young K

Classifications

• G06F30/20

  Design optimisation, verification or simulation (optimisation, verification or simulation of circuit designs G06F30/30) · CPC title

• G06F30/15

  Vehicle, aircraft or watercraft design · CPC title

• G06F30/17 Primary

  Mechanical parametric or variational design · CPC title

• B64D13/08

  the air being heated or cooled · CPC title

• G05B23/0254

  based on a quantitative model, e.g. mathematical relationships between inputs and outputs; functions: observer, Kalman filter, residual calculation, Neural Networks · CPC title