Diagnosis method for boiler degradation, diagnosis apparatus for boiler degradation, diagnosis system for boiler degradation and recording medium that records operation program
First Claim
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1. A diagnosis method for boiler degradation, comprising:
- calculating a first thermal transmission rate from a difference in thermal quantity of gas or steam between an entrance and exit of a heat exchanger with respect to at least one heat exchanger constituting the boiler;
calculating a second thermal transmission rate based upon a thermal conductivity rate of pipes and thermal;
conductivity transfer rate of steam and gas of the heat exchanger;
comparing the first and second thermal transmission rates; and
carrying out diagnosis of the progress of degradation, wherein the diagnosis is displayed on a display device, wherein the boiler is a heat recovery boiler for recovering heat from a gas turbine.
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Abstract
One of the thermal transmission rates that represent thermal transmission from gas to steam in a heat exchanger constituting a boiler is calculated based on thermal conductivity rate of pipes and thermal transfer of steam and gas, and the other is compared with the thermal conductivity rate calculated based on the thermal conductivity rate of the pipes and thermal transfer rate of steam and gas.
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3 Claims
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1. A diagnosis method for boiler degradation, comprising:
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calculating a first thermal transmission rate from a difference in thermal quantity of gas or steam between an entrance and exit of a heat exchanger with respect to at least one heat exchanger constituting the boiler;
calculating a second thermal transmission rate based upon a thermal conductivity rate of pipes and thermal;
conductivity transfer rate of steam and gas of the heat exchanger;
comparing the first and second thermal transmission rates; and
carrying out diagnosis of the progress of degradation, wherein the diagnosis is displayed on a display device, wherein the boiler is a heat recovery boiler for recovering heat from a gas turbine.
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2. A boiler degradation diagnosis system comprising:
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a measuring device for steam and gas taken from a boiler;
a database for storing design information of heat exchangers constituting the boiler and physical property values of steam and gas;
a calculation device for calculating a first thermal transmission rate based on thermal difference of gas or steam at an exit and entrance of heat exchangers of pipes and for calculating a second thermal transmission rates based upon thermal conductivity rate of pipes, and thermal transfer rates of steam and gas, stored in the database; and
a display device for displaying a change of tendency in the first and second thermal transmission rates with respect to the same heat exchanger, wherein the boiler is a heat recovery boiler for recovering heat from a gas turbine.
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3. A recording medium for a boiler degradation diagnosis program for causing a computer to calculate a first thermal transmission rates from thermal quantity difference in steam or gas between an exit and entrance of at least one heat exchanger, further to calculate a second thermal transmission rates based upon thermal conductivity of pipes and thermal transfer rates of steam and gas with respect to the same heat exchanger, to compare the first and second thermal transmission rates, to diagnose progress of degradation, and to display a diagnosis result, wherein the boiler is a heat recovery boiler for recovering heat from a gas turbine.
Specification