ASME PTC 22-2005 FREE DOWNLOAD

Calculate a maximum uncertainty by using the Code Limit for each measu reme nt from Table Two three-way manifolds are acceptable, providing it has been verified that there is no leakage past the equalizing valve of each differential pressure transmitter. Some common ones are listed in paras. Phrase the question as a request for an interpretation of a specific requirement suitable for general understanding and use, not as a request for an approval of a proprietary design or situation. Measurement frequency and locations shall be sufficient to account for stratification of the inlet air temperature after applications with inlet air-conditioning system s.

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

Calculate the average molecular weight of the wet air by the following equation. The resultvalues of a calibration permits the estimation of errors of indication of the measuring instrument, measuring system, or the assignment of pgc to marks on arbitrary scales.

The compressor extraction air enthalpy is calculated with the same composition and the measured extraction air temperature. ASME PTC calibration medium is allowed to stabilize until the temperature of the standard is fluctuating less than the accuracy of the standard.

When it is necessary to utilize reference standards for field calibrations, adequate measures shall be taken to ensure that the necessar y cal ibr ati on sta tus is mai nt ain ed du ri ng transportation and while on-site.

Existing station voltage or 2-22005 transformers may be used for the test if they meet the requirements of this Code. Recognizing the importance of the gas composition as one of the main contributors to the determination of the heat rate, the Code makes the following recommendations, which may reduce the error level.

Due to the significant influence of inlet air temperature on test results, and the variation of this sensitivity over the ambient temperature range, it is recommended that Code Limits be established for several inlet air temperatures, or range of temperatures, so that the final post-test uncertainty can be compared 22-205 to a Code Limit test uncertainty at or near the test inlet air temperature.

For the determination of exhaust energy, a simple energy balance is performed around the test boundary. ASME PTC Appropriate calibration standards for field calibration or recent factory calibra tion certification needs to be available prc order to ensure compliance with the measurement uncertainty requirement.

ASME PTC - Free Download PDF

Some test programs may require some data to be recorded manually. For comparative performance tests this Code establishes a limit for the uncertainty of ssme performance result as described in subsection 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.

Normally the factory tests determining the The moisture content of inlet air shall be measured directly with a hygrometer or indirectly by measuring the adiabatic wet-bulb temperature. The density for each fu el sample is calculated from the pressure, temperature, compress- 27 Copyright c by the American Society of Mechanical Engineers.

Typical boundary locations are shown in Fig. Current transformer cores may be permanently magnetized by inadvertent operation with the secondary circuit opened, resulting in a change in the ratio and phase-angle characteristics. Normal station instrumentation may be connected to the test transformers if the resulting total burden is known and is within the range of calibration data. When an accepted reference value is available, the systematic error associate d with each lab can be determined, which includes both the lab bias and the method bias.

The overall test uncertainty will be unique for each Code test because of the For absolute performance tests, this Code establishes a limit for the uncertainty of each required measurement parameter or variableand also limits the variation of the critical parameters during the test. Participation by federal agency representative s or person s affiliated with industry is not 22-20005 be interpreted as government or industry endorsement of this code or standard. This uncertainty reflects the impact of the measurement errors on the test result.

Since both temperatures are nearly identical for air inlet temperature measurement, the voltage signal is extremely small, thereby increasing the uncertainty of the measurement. 22-205 calibration laboratory facilities should be able ASME procedures provide for reconsideration of any interpretation when or if additional information that might assme an interpretation is available.

ASME PTC 22-2014

Both pre- and post-test uncertainty calculations are required. It may be applied to gas turbines in combined cycle plants or with Care should be taken to ensure that the square root is applied only once.

Start Webshop Product catalog Product presentation. 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.

ASME PTC 22-2005 Gas Turbines - Performance Test Codes

For this example, the data from the Mandatory Appendix I will be used: The table values are determined from an oxidation chemical reaction for a unit mole of each fuel ptx constituent in accordance with the following generic oxidation equation. Cod e Limit Uncertainty Example. It is recommended that the inlet air temperature be measured at the test boun dary ; however, th ere may be ca ses wh ere th e measurement upstream or downstream may be more practical and result in a measurement of lower uncertainty such as selecting to measure temperature inside the inlet air duct instead of at the inlet of the duct i.

Read more about subscriptions. This Code provides for the testing of gas turbines supplied with gaseous or liquid fuels or solid fuels converted to liquid or gas prior to entrance to the gas turbine. Even if the poorer before instrumentation were retained, the U value drops to 0.