The object of this Code is to establish procedures forconducting performance tests of Heat Recovery Steam Generators(HRSGs) used to recover gas turbine exhaust energy.  The steamgenerator may include supplemental firing.  This Code providesstandard test procedures yielding the highest level of accuracyconsistent with current engineering knowledge and practice.

(a) The purpose of this Code is to determine the following:
     (1) capacity of the unit at specifiedconditions.
     (2) energy input from gas turbine exhaustand supplementary firing.
     (3) gas side pressure drop.
     (4) steam/water side pressure drop(s).

(b) This Code provides methods for converting the performance attest conditions to specified operating conditions. A determinationof any or all of the performance items listed above may be used forthe following purposes:

     (1) checking the actual performanceagainst guarantee.
     (2) comparing these items at referenceconditions.
     (3) comparing different conditions ormethods of operation.
     (4) determining the specific performanceof individual parts or sections of the HRSG unit.
     (5) comparing the performance when firingdifferent fuels.
     (6) determining the effects of changes toequipment.

Also, this Code addresses steam generators whose primaryfunction is to recover heat from gas turbine exhaust.  Methodsnoted in this Code may also be used for testing other heat recoveryunits which may include the following:

(1) Units heating water only.
(2) Units using working fluids other than water.
(3) Units obtaining hot gas heat input from sources other than gasturbines.
(4) HRSGs with fresh air firing capability.

This Code does not cover the following testing:

(1) fired steam generators which primary function does notinclude the recovery of heat from gas turbine exhaust.  Theseare addressed in PTC 4 and PTC 34.
(2) auxiliary equipment such as pumps and fans that are addressedin PTC 8.2 and PTC 11, respectively.
(3) deaerator performance that is addressed in PTC 12.3.
(4) equipment noise emissions that are addressed in PTC 36.
(5) gaseous emissions to atmosphere.
(6) steam purity.

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