ASME PTC 22-2005 FREE DOWNLOAD

This will substantially reduce thesystem atic uncertainties when they are correlated. When considering the accuracy of a measurement, the accuracy of the entire measurement loop must be considered. As time progressed and gas turbine designs improved both in efficiency and power output ratings, it became common to install gas turbines in base loaded combined cycle plants. Every effort should be made to minimize the errors in these measurements if the heat balance method is to be used. Calibrations shall be performed in a controlled environment to the extent necessary to ensure valid results. For comparative performance testing, unlike absolute level testing, the uncertainty is more complex since the desired result is the difference in performance rather than the absolute level. Instances of leakage and unmetered return flows should be treated on a caseby-case basis and the method for accounting for such flows should be agreed upon.

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Similarly, the compressibility Z is not a straightforward function of composition, and can be more easily handled by including it in the orifice factors directly.

ASME PTC - Free Download PDF

All input and output energy streams required for test calculations must be determined with a sample calculation spreadsheet is provided at the end of this Appendix. It can be shown that this is the same as the RSS value of the individual uncertainties: Alternative methods may be used if they are equivalent in accuracy and are mutually agreed upon by all parties prior to the test. The preferred solution for the determination of the gas composition is the analysis in a laboratory using method s and standar ds that are traceable to U.

The correction is as 22-0205 Calculate the average molecular weight of the wet air by the following equation. The turbine exhaust molar flow must also include the molar flow of steam or water injection into the gas turbine.

ASME PTC 22-2014

These two can be reconciled in the following manner. This Code provides for the testing wsme gas turbines supplied with gaseous or liquid fuels or solid fuels converted to liquid or gas prior to entrance to the gas turbine. Frequently, the definition of a load point, such as base load, at which a test is to be conducted, may depend on a specific guide vane angle.

Wilkinson,American Electric Power J.

The mechanically aspirated psychrometer should incorporate the following features: Comparative 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. The Code is used to calculate the sensible heat content of the liquid fuel.

Other devices can be utilized to calibrate absolute pressure instruments provided that the same level of care is taken.

ASME PTC 22-2005

The output of some instrumentation like thermocouples cannot be modified so electronic calibration is necessary. These mandatory uncertainty limits represent Gas fuel temperature for sensible heat calculation Oil fuel temperature for sensible heat calculation the total uncertainty of each particular measur ement including all systematic which include spatial and random effects. DP For differential pressure transmitters on flow devices, the transmitter output is often an extracted square root value unless the square root is applied in the plant control system.

As discussed earlier, the parties may have previous experience with testing labs that can influence the value of s L, which hopefully will reduce the uncertainty of this value.

For more information about such agreements, or product availability as hardcopy, please contact us by phone 67 83 87 00 or email salg standard. Determine the composition of combustion asmw using the combustor air molar flow as determined in Step 4 and adding the change in molar flow due to the combustion of fuel in the gas turbine from Step 2.

It may be applied to gas turbines in combined-cycle power plants or with other heat recovery systems.

In particular, the random uncertainty can now be calculated and incorporated. The variance of B can be written as s L2.

ASME PTC 燃气涡轮机的性能试验规则 标准

Reference standards shall be routinely calibrated in a manner that provides traceability to NIST, a recognized international or national standard organization, or defined natural physical intrinsic constants and have accuracy, stability, range, and resolution for the intended use.

The excess air enthalpies are I The injection fluid enthalpy shall be calculated in accordance with the applicable version of the ASME Steam Tables or other appropriate standard for the given injection fluid. The two typical test boundaries are a the hardware scope boundary for determination m Procedure for recording test readings and observations n Number of test runs and durations of each run o Test loads and rotating speeds at which the test is to be conducted p Frequency of data acquisition, data acceptance and rejection criteria q The method for combining test runs to calculate the final test results r Numerical values, curves or algorithms for corrections and adjustments to be applied to test determinations when tests are conducted under conditions differing from the specified conditions s Procedures to account for performance degradation, if applicable t Sample calculations or detailed procedures specifying test run data reduction and calculation and correc- of corrected performance [power output and heat rate efficiency ] of the equipment within.

This Code provides for comparative back-to-back tests designed to verify performance differentials of the gasturbi ne,prima rily for testingbefor e andafter modifications, uprates, or overhauls. ASME Codes are developed and maintained with the intent to represent the consensus of concerned interests.

The gas turbine exhaust temperature is determined in accordance with Section 4. For each of the variables the partial 22-2050 are determined. This will establish the Code Limit test uncertainty.

Subscripts used in this Code are listed in Table It is recommended to review the particular type and the site arrangement before deciding which one is suitable to a given measurement application.