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Method for detecting heat exchanger tube failures when using input/loss performance monitoring of a power plant

  • US 6,745,152 B1
  • Filed: 04/24/2002
  • Issued: 06/01/2004
  • Est. Priority Date: 03/24/1998
  • Status: Expired due to Fees
First Claim
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1. A method for quantifying the operation of a fossil-fired thermal system when a fuel chemistry is determined from Input/Loss methods through knowledge of when its heat exchanger leaks at a tube leakage flow rate into the combustion gases, the method for quantifying the operation comprising the steps of:

  • selecting a set of minimization techniques applicable to the thermal system and its fuel, and a set of routine inputs and convergence criteria to the minimization techniques, and a Choice Operating Parameter of tube leakage flow rate, and an initial value of tube leakage flow rate, selecting a set of routine Choice Operating Parameters and their initial values, determining a set of System Effect Parameters applicable to the thermal system and its fuel whose functionalities effect the determination of system heat rate rate and tube leakage flow rate, determining a set of Reference System Effect Parameters applicable to the set of System Effect Parameters, determining an objective function applicable to the thermal system'"'"'s stoichiometric situation which uses the Choice Operating Parameters of tube leakage flow rate, the set of routine Choice Operating Parameters, the set of System Effect Parameters, and the set of Reference System Effect Parameters, optimizing the Choice Operating Parameters of tube leakage flow rate and the set of routine Choice Operating Parameters by employing the set of minimization techniques and the objective function such that convergence criteria is met resulting in a set of converged Choice Operating Parameters including a final tube leakage flow rate, and reporting the final tube leakage flow rate such that corrective action may take place.

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