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ASME PTC 4.3 PDF

ASME PTC Air Heaters. ; Status: Active, Most Current; Document Language: English; Published By: ASME International (ASME). The Code on Definitions and Values (ASME PTC 2) defines the meaning and values of basic technical terms and numerical constants that are. Asme Ptc Air Heaters Bw () – Download as PDF File .pdf), Text File .txt) or read online.

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The appendixpresentsa brief discussionof this with a more detailed discussionavailable in the project reports5 As discussed in the Appendix, examination of the derivation of thesesampleerrorssuggeststhat for standard, multipoint traversesof utility-scale equipment,the bias and random errorsshown in Table II for these averagetemperaturesand compositionsare typical.

ASME PTC Air Heaters, –

For the examplepresented,the estimateduncertainty is 4. Since the ASME procedurebasesthe flue gas and air flow rates on the coal feedrate andgasproperties, rather than on the measuredgasand air velocities, the derivation of the errors of the individual parametersis complex.

Click here to sign awme. Please login to your authorized staff account to use this feature. The inclusion of crossproducts,i terms, addssignificantly to the number of terms that must be evaluated. Founded in by a small group of leading industrialists, ASME has grown through the decades to include more thanmembers in countries.

Of interest is the fact that the uncertainty in the design of a heat exchangerestimatedby Jamesis much larger than the uncertainty in the estimateof the performance. This createsa consistentbasis for the calculations. An air heater is shown schematicallyin Figure Ptf. The air heaterson Unit 2 were replacedto improve unit efficiency as part of the demonstration program.

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ASME PTC 4.3

Moreover, pt inlcak makesit difftcult to determinethe exiting flue gas temperature and the performance of the air heater. The air heater is a souteeof lost thermal efficiency in two ways — air leakageinto flue gas side andpoor heat recovery.

CommentsI Basis llmension Width 0. CO 20 mm 10Ppm Same co, 0.

Asme Ptc 4.3 Air Heaters Bw (1991)

The uncertaintyanalysispresentedbelow contains the results for both the primary and secondarysidesof the air heater.

Register for a trial account. Similarly, for the deviation from the design entering flue gas temperature,the temperature correotion is: Similarly, the gas density is calculated: While normally severalair streamsarc present primary and secondary ,in this paper we examineonly one sectionof the air heater.

pptc The averageis basedon a traverseof an inlet or outlet duct. The ASME code predicts the temperaturecorrectedto the designvalue while the performancecurvespredict the expectedtemperatureat operating conditions. The parametervalues used for the estimation of the uncertainty of the TCFGOT and the bias and random erroreassociatedwith them are shown below in Table I. Details of the air heaterperformanceand of the uncertainty analysis can be found in the referencedreports.

In the air heater,energy in the flue gas is recovered by the incoming combustion air. Search book title Enter keywords for book title search. The computedvalue of the TCFGOT should be less than or equal to the design flue gas temperature,if the air heateris performing properly.

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For application of Equation 1, two additional, independenttemperaturecorrectionsare required. However, this derivation will be general. The measuredflue gastemperatureleaving the air heater, lcls, subtractsout three leak terms asthis measuredvalue containsleak. There were no books found for the applied search filters. Measurement Uncertain Part 1. To evaluatethe bias error associatedwith the air temperatureat the inlet: That is, the difference between f.

This tends to compensatefor bias errors. Enter your account email address to request a password reset: Enter the email address you signed up with and we’ll email you a reset link.

The determinationof the temperaturecorrectionsfor differences from design X-ratio and design flue gas flow are left to the supplier or purchaserto determine. Normally the manufacturer will supply the purchaserwith designperformancecurves or equations,but not ;tc those to calculatethe temperaturecorrectionsspecified by the PTC.

In the caseof the bias error, the crossproduct telms accountfor essentially all of the error in determining the averagetemperature.

For the deviation from design flow, the temperaturecorrection,to, 6nis: With the crossproducts, this increasesto terms. Skip to main content. If you like to setup a quick demo, let us know at support madcad.

For the deviation from the design entering air temperature,rclJM,this is: The uncertainty is shown as a percent of the final calculatedvalue. The gas composition was determinedgenerally following the phc EPA Method 3?.