Two gas turbine exhaust gas flow testing methods in ASME PTC 4.4 2008 version were described in this paper

namely the gas turbine heat balance method and heat recovery steam generator(HRSG)heat balance method.Taking the performance test results of an F class combined cycle unit as the example

the above two methods were compared

from the aspect of measuring parameters

instruments

testing results and uncertainty analysis.The results show that

to reduce the experimental costs

apretest sensitivity analysis for each design parameter is recommended when choosing the testing method and instruments with relevant precisions and quantities

for combined cycle unit with different systems.