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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This tends to compensatefor bias errors. The uncertainty for a duct traversewith as few as4 points is still dominated by the bias errors. This paper addressesthe issue of properly evaluating the 4. heater performance and the accuracyof the final result.

Note that using same single thermocoupleto measureall of the temperaturesin the traverseof a plane in a duct createsa dependencybetweenthese measurements. Similarly, for the deviation from the design entering flue gas temperature,the temperature correotion is: With ptx crossproducts, this increasesto terms. The bias and random errors arepropagated separatelyand summedto form the B and S componentsof Equation Similarly, the gas density is calculated: These improvements will allow utilities to comply with the CleanAir Act Amendmentsof Land Use and Development.


Each air heater heats both primary and secondaryair for half of the unit in separatesectionswith the flue gas mixed before and after the tir heater. For the details of the estimation of the uncertaintiesof other parameters,refer to the final Milliken project report8 Only the errors and uncertainty for theseother evaluations are presentedhere. The ASME code predicts the temperaturecorrectedto the designvalue while the performancecurvespredict the expectedtemperatureat operating conditions.


The bias errors and random errors, a, for this calculation are listed in Table A-I. Measurement Uncertain Part 1. Register for a trial account.

The following example shows the evaluation of one of the incrementalchangeterms required by Equation The gas composition was determinedgenerally following the proceduresof EPA Ptcc 3?. Remember me on this computer.

The methods followed in deriving the estimatesof the uncertainty of the individual parametersarepublished by ASME. Should the manufactureralsoprovide proceduresfor calculating the specified PTC temperaturecorrections,the results can be checkedusing the proposedprocedure. The bias error is responsiblefor the majority of the uncertainty evenwith only a four-point traverse.

This paper provides a method for evaluating the remaining two temperaturecorrectionsusing the performance curves. No items in cart. In the caseof the Milliken study, the correlation equationsagreedwith results from the plots within the ability to read the plots. For the deviation from design flow, the temperaturecorrection,to, 6nis: If the denominatorof Equation A5 is set equal to Sum1and the numerator equal to Sum2 to simplify the resulting equations,thesepartial differentials are: The bias and random errors are propagatedseparatelyusing Taylor seriesexpansionsfor highly nonlinear equations: The air heater is a souteeof lost thermal efficiency in two ways — air leakageinto flue gas side andpoor heat recovery.

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Print 1 2 3 4 5 page sstarting from page current page. As previously mentioned, many of the crossproduct terms must be included in the bias calculationssince the sameequipment was usedto measurea parameter.

Asme Ptc Air Heaters Bw () – Free Download PDF

For application of Equation 1, two additional, independenttemperaturecorrectionsare required. The parametervalues used for the estimation of the uncertainty of the TCFGOT and the bias and random erroreassociatedwith them are shown below ptv Table I.

The bias error associatedwith tbe thermocoupleis the samefor all points. Remember me for one month.

Asme Ptc 4.3 Air Heaters Bw (1991)

However, this derivation will be general. The averageis basedon a traverseof an inlet or outlet duct. Founded in by a small wsme of leading industrialists, ASME has grown through the decades to include more thanmembers in countries.

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