Heat exchanger performance monitoring and analysis method and system

• US 7,455,099 B2
• Filed: 06/29/2004
• Issued: 11/25/2008
• Est. Priority Date: 12/19/2003
• Status: Active Grant

• Current Assignee: BL Technologies Inc. (Ashland Global Holdings, Inc.)
• Original Assignee: General Electric Company
• Inventors: Yu, Lijie, Ryali, Venkatarao, Osborn, Mark David, Vora, Nishith Pramod, Shah, Sunil Shirish, Prasad, Vijaysai, Au, Shirley Suet-Yee, Chong, Ivy Wai Man
• Primary Examiner(s): Ford; John K
• Application Number:
  US10/879,459
• Publication Number:
  US 20050133211A1
• Time in Patent Office: 1,610 Days
• Field of Search: 702/81, 702/34, 702/51, 702/52, 702/181, 702/182, 702/183, 702/185, 702/191, 374/170, 165/11.1, 165/95
• US Class Current: 165/11.1
• CPC Class Codes: F28F 19/00 Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
• CPC Class Codes: F28F 27/00 Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus control arrangements in general G05

Abstract

A technique is disclosed for evaluating and monitoring performance of a heat exchanger system. Operating parameters of the system are monitored and fouling factors for heat transfer surfaces of the exchanger are determined. Trending of fouling may be performed over time based upon the fouling factors, and a model of fouling may be selected from known sets of models, or a model may be developed or refined. Fluid treatment, such as water treatment regimes may be taken into account in evaluation of fouling. An automated knowledge based analysis algorithm may diagnose possible caused of fouling based upon sensed and observed parameters and conditions. Corrective actions may be suggested and the system controlled to reduce, avoid or correct for detected fouling.

Claims

1. A method for monitoring performance of a heat transfer system, comprising:

diagnosing a probable root cause of performance degradation of a heat transfer surface via an automated knowledge based analysis algorithm, based on sensed data accessed from the heat transfer system, including;

performing a momentum balance based upon the sensed data;

performing an energy balance based upon the sensed data; and

determining individual performance degradation for the heat transfer surface and overall performance degradation for the heat transfer system based upon the momentum balance and the energy balance.

2. The method of claim 1, wherein the automated knowledge based analysis algorithm comprises a Bayesian network.

3. The method of claim 1, wherein the sensed data is accessed at different points in time or at different locations in the system.

4. The method of claim 1, further comprising performing a quality enhancement of the sensed data by applying a measurement noise mitigation algorithm on the sensed data.

5. The method of claim 1, further comprising predicting performance degradation of the heat transfer surface based upon performance degradation determined at different points in time.

6. The method of claim 5, wherein predicting the performance degradation comprises utilizing a multi-model adaptive approach to predict a trend of performance degradation based on the performance degradation determined at different points in time.

7. The method of claim 1, further comprising determining a corrective action to reduce or limit performance degradation based on the determined performance degradation.