Air-Cooled Steam Condensers Performance Test Codes A N A M E R I C A N N A T I O N A L S T A N D A R D ASME PTC ASME. ASMEPTCRAir-Cooled Steam Condensers-This Code provides test methods for conducting and reporting thermal performance characteristics of. ASME PTC (R) Air-Cooled Steam Condensers This Code provides test methods for conducting and reporting thermal performance.
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It may be a flange or a landing bar for a pgc. Simply mail, phone, fax, or E-mail us and an Information Central representative will handle your request. These environmental effects are many and can often be significant including a a varying recirculation at different pptc speeds b fan stall or asmr c nonrepresentative inlet or ambient temperatures d poor inherent performance in local wind due to speed or direction compared to the Code wind speed limits e Code test results that would not be representative of daily operation All these impacts on the performance can be estimated by a computational fluid dynamic CFD simulation study of the ACC.
Makeup water temperature shall be measured. In contrast to many other types of equipment, duringtypical operation, an ACCs performance is likely dimin-ished in moderate wind conditions typically due to inter-ference effects from the nearby structures, fan inlet airflow separation, recirculation effects, interference, andmaldistribution amse the air in the plenum. Data logging should be checked to ensure complete-ness and quality, prior to stopping the test.
Readings shall be taken at six positions 30 degapart around the circumference of the pipe. Before proceeding to select, construct, install, calibrate or operate instruments, relevant sections of ASME PTC 19, Series of Supplements on Instruments and Apparatus, should be reviewed for detailed instructions.
This correction requires either a measurement or estimate of condensate pump power. It is sometimes called bias. Participation by federal agency representative s or person s affiliated with industry is not to be interpreted as government or industry endorsement of this code or standard.
The exponents are asmd by their use in simplified approximations to the variation of a the tpc heat transfer coefficient with air flow, mk and b the friction factor for air flow through the finned tube bundles, n 42 Fig.
Asme ptc 25 pdf – ptc 25 pdf. This steam flow capabilitymay be alternatively expressed as a deviation fromdesign flow capability, a deviation from design turbinebackpressure, or as the absolute value of the steam tur-bine backpressure. ASME Performance Test Codes provide test procedures that yield results of the highest level of accuracy consistent with the best engineering knowledge and practice currently available.
The parame-ter can be determined by measurement with a singleinstrument, by the average of several measurements ofthe same physical quantity, or by computation frommeasurements of other physical quantities.
Manufacturer and Model is by seller. All parties to the test may conduct reasonable preliminary test runs as necessary.
We have no amendments or corrections for this standard. When tests are run in accordance with a Code, the test results themselves, without adjustment for uncertainty, yield the best available indication of the actual performance of the tested equip- ment. HgA toensure a concrete uncertainty target that is achievableand at the same time provides a good test.
All test parties shall havea clear understanding of the test object, the proposedprocedures, and the results to be obtained. Any omissions or ambigu- ities as to any of the conditions are to be eliminated or their values or intent agreed upon before the test is started.
The illustra- tive example that follows is based on the values averaged for Hour 4 5: From the steam turbine heat balance diagram corresponding to the ACC design conditions, obtain the inlet temperature and pressure for the low pressure turbine as well as the turbine exhaust enthalpy and pressure. The measurement location should be downstream of the condensate pump recirculation piping and upstream of any branches.
Cuchens, Pct Company Services, Inc.
PTC Test Uncertainty. The request should identify the Code, the paragraph, figure or table number sand be written as a Question and Reply in the same format as existing Cases.
ASME PTC 空气冷却蒸汽冷凝剂 – MBA智库文档
Air bleeds, if required, shall not be continuous, but only intermittent. The method and results of this correction shall be mutually agreed between the parties and taken into account in the fan motor input power measurement. The error varies ina random, Gaussian normal manner, from measure-ment to measurement. At a minimum, 20 pipe diameters of undisturbed, straight pipe length upstream and four pipe diameters downstream of the flow measurement device shall be provided.
Albert, General Electric Co. ASME does notapprove, certify, rate, or endorse any item, construction, proprietary device, or activity. Interpretations can only be rendered in response to a written request sent to the Secretary of the PTC In particular, it should be appreciated that the results of such a study would provide an estimate of the relationship of test results according to this Code and the expected daily operation at the site with its local topography and the existing environmental conditions.
The level of the condensate in the condensate tankshall be continuously measured during the test periodin order to determine change of condensate mass.
ASME PTC 30.1-2007.pdf
As a result the steam quality may deviate from its design value requiring that a correc- tion be made see paras. Therefore, an approximation of mk p 0. It should be noted that the purpose of a post-test uncertainty analysis is to determine the uncertaintyof the final test results.
Makeup water temperature shall be measured. Therefore, it is recommended that the parties to a commercial test agree before starting the test and preferably before signing the contract on the method to be used for comparing the test results to the contractual guarantees. When tests are run in accordance with a Aske, the test results themselves, without adjustmentfor uncertainty, yield the best available indication of the actual performance of the tested equip-ment.
Although exact values are important, the differences that exist between them prc of greater interest. Fan power or other ancillary factors maybe included. Theduct may include expansion joints, bypass spargers,drain pots, branch systems, and isolation valves.
Temperature fields with and without wind are com- pared in Fig. HgA to 9 in. Information as to whether or not technical inquiries are issued to this code or standard is shown on the copyright page. The request for interpretation should be clear and unambiguous. This code or standard was developed under procedures accredited as meeting the criteria for American National Standards.