ASME PTC 22-2005 FREE DOWNLOAD

The Code defines uncertainty limits for each of the measured parameters; thecombi nation of the applicable limits will determine the Code Limit for that particular configuration and test. Correction is made to gas turbine performance based on deviations of the shaft speed from the Specified Reference Conditions. To overcome this change in systematic error, it may be necessary to upgrade some instruments priorto pretest. The data calculation system should have the ability to average each input collected during thetest and calculate test results based on the averaged results. Determine the change in molar flow of the air to exhaust gasconsti tuents due to thecombu stion of the gas turbine fuel as described in para. When conducting gas turbine tests before and after a modification, the parameter of interest is the change in pe rf or ma nc e. Test plans shall include a sketch showing the measurement and the test boundary locations.

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Start-up procedures must ensure that spool pieces are provided during conditions that may violate the integrity of the flow measurement device to avoid altering the devices characteristics. Monitoring Standards monitoring is a free service designed for you who wish to be alerted of changes to or new editions of the standards required in your work.

ASME PTC Gas Turbines - Performance Test Codes [PDF] - Все для студента

Molecular weights ada pted from C oursey, J. Some fixed losses may be quantified by measuring the lube oil flow and the temperatures in and out of the lube oil cooler. Turbine meter calibrations conducted with natural gas as the calibration fluid shall be conducted at design pressures and temperatures and calibration data points shall be to demonstrate a calibration accuracy consistent with this criteria.

The correction is as follows: Hopefully qualified labs will work to minimize this component of bias.

The PTC Committee investigated several different means for determining exhaust flow and energy such as inlet flow measuring devices, exhaust flow measuring devices, HRSG heat balance, exhaust gas constituent analysis, and gas turbine heat balance.

In acco rda nce with Nonmandatory Appendix B, the uncertainties can be relate d to the repro ducibi lity figu res giv en in ASTM Aasme by dividing by the square root of 2.

ASME PTC - Free Download PDF

As stated in para. The voltage transformer ratio correction factors shall be applied at the actual burdens of the test, which may be determined by calculation from lead impedances, or by direct measurement. The choice of the test boundary can have a significant impact on the test results.

Since this is a measure of the actual power, which comes off of the main generator bu s, th is is th e pr ef er red me th od of de ter mi ni ng exciter power required. To evaluate the normalized partial derivatives, the performance or ssme data aasme the gas turbine must be available. The data sheets should each identify d Distributed control systems typically only report changes in a variable when it exceeds a preset threshold or deadband value.

This static head adjustment may be applied at the transmitter, in the data acquisition system, or manually by the user after the raw data is collected. In general, measurements or determinations are required for the streams noted in Table Th e ad ju st ed enthalpy is determined by subtracting the saturated vapor enthalpy at the selected reference temperature from pct ASME Steam Tables enthalpy [ref.

ASME PTC 22-2014

To simplify the calculus, an examination of the expansion factor shows that its sensitivity to MFi is very weak compared to that for the density and the heat value. Asmw performance between pre- and posttests will typically result in differential performance values with lower uncertainty than the individual absolute value performance uncertainties, due to partial cancellation of systematic errors. ASME PTC differences in the scope of supply, fuels used, turbine sensitivities, instruments selected, and driven equipment characteristics.

Such conditions may include line blows. Verification provides a means for checking that the deviations between values indicated by a measuring instrument and corresponding asm values are consistently smaller aeme the limits of the permissible error defined in a standard, regulation, or specificatio n particular to the management of the measuring device.

Solve the equation for the excess air flow. Measurement frequency and locations shall be sufficient to account for stratification of the inlet air temperature after applications with inlet air-conditioning system s.

These can consist of a centralized processing unit or distributed processing to multiple plant locations.

Particular care should be taken to record any adjustments made to any equipment under test, whether made during a Special care shall be taken to ensure that the fuel pct location is as far downstream of all processes outside of the test boundary that may change the composition of the gas e.

The air constituent molar flow to the combustor is the air molar flowtimes theconsti tuent mole fraction.

ASME PTC 22-2005

Each measurement loop must be designed with the ability to be loop calibrated separately, and so that it can individually be checked for continuity and power supply, if applicable, to trace problems during equipment setup and checkout.

The mechanically aspirated psychrometer should incorporate the following features: All uncertainty values that have been determined and agreed pc shall be included in the report see Section 6.

If this is not possible, the high points must be vented, before reading the instrument. There are, however, many practical situations where this is not true; for example, using the same instruments to measure ltc parameters, or calibrating different instruments against the tpc standard.

Should serious inconsistencies which affect the results be detected, the run shall be invalidated completely, or it may be invalidated only in part if the affected part is at the beginning or at the end of the run.