ASME PTC-30.1:2007 pdf download Air-Cooled Steam Condensers Performance Test Codes
1-2 SCOPE
This Code provides rules for determining the thermal performance of the referenced equipment with regard to the steam flow capability while meeting any applica- ble fan power guarantees. This steam flow capability may be alternatively expressed as a deviation from design flow capability, a deviation from design turbine backpressure, or as the absolute value of the steam turbine backpressure. This Code also provides procedures for assessing compliance to specified dissolved oxygen and specified condensate temperature. This Code does not address procedures for assessing noise. The Code is not intended for tests of
(a) devices for which the process fluid is above atmo- spheric pressure
(b) devices for process fluids other than steam
(c) devices for single-phase process fluids
(d) wet surface air cooled condensers
(e) natural draft or fan-assisted air cooled condensers
(f) air-cooled condensers with inlet air conditioningin-service
The determination of special data or verification ofguarantees that are outside the scope of this Code shallbe made only with the written agreement of the partiesto the test. The agreed methods of measurement andcomputation shall be defined in writing and fullydescribed in the test report.
1-3 UNCERTAINTY
The explicit measurement methods and procedureshave been developed to provide a test of the highestlevel of accuracy consistent with practical limitationsfor acceptance testing.Any departure from Coderequirements could introduce additional uncertaintybeyond that considered acceptable to meet the objectivesof the Code.
The application of uncertainties to adjust test resultsis not part of this Code; the test results themselves provide the best indication of actual performance. Theuncertainty is used to determine the quality of the testand reflects the accuracy of the test instrumentation andstability of the test conditions. Test tolerance, marginand allowance are commercial matters that are notaddressed by this Code.
The maximum uncertainties shown below are limits – not targets. A Code precept is to design a test forthe highest practical level of accuracy based on currentengineering knowledge For a commercial test, this phi.losophy is in the best interest of all parties to the testDeviations from the methods stated in this Code areacceptable only if it can be demonstrated to the testparties that the deviations provide equal or lower uncer-tainty in the calculated test result.
A pretest uncertainty analysis shall be performed toestablish the expected level of uncertainties for the testincluding an estimate of the random (precision) uncertainty based on experience.
A post-test uncertainty analysis is similarly requiredThe results of a thermal performance test, conducted infull compliance with the procedures and instrumenta-tion specified in this Code, shall be considered valid if