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Evaluation method for dew point determination test of nuclear power station compressed air dryer

A technology of compressed air and evaluation methods, which is applied in the testing of machines/structural components, instruments, measuring devices, etc. It can solve problems such as large errors and complex calculation formulas, and achieve the effect of eliminating accidental errors and improving accuracy

Active Publication Date: 2020-12-08
CNNC FUJIAN FUQING NUCLEAR POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this evaluation method is that the error is large and the calculation formula is complicated.

Method used

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  • Evaluation method for dew point determination test of nuclear power station compressed air dryer
  • Evaluation method for dew point determination test of nuclear power station compressed air dryer
  • Evaluation method for dew point determination test of nuclear power station compressed air dryer

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Embodiment 1

[0085] Assume that the test dew point acceptance requirement is that the compressed air dryer is less than or equal to -20°C under the pressure of 0.7MPa.g. Now known test pressure P 0 It is 0.8MPa.g, since there is no conversion curve with a pressure of 0.8MPa.g in the conversion chart of normal pressure dew point and pressure dew point provided in "GB / T4830-2015 Industrial Automation Instrument Air Source Pressure Range and Quality", it is necessary to Test pressure P 0 Convert it to the pressure dew point at 0.7MPa.g, and compare it with the acceptance standard value -20°C.

[0086] Evaluate according to the method of the present invention below:

[0087] select P 6 = The relationship curve between pressure dew point and normal pressure dew point under 0.7MPa.g (T 压 -T 常 ) 6 formula:

[0088] -70℃≤T 常 Under the condition of ≤-50℃, T 压 =1.472727T 常 +48.090909;

[0089] -50℃≤T 常 Under the condition of ≤-30℃, T 压 =0.745455T 常 +11.818182;

[0090] -30℃≤T 常 Under t...

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Abstract

The invention relates to the field of data evaluation, in particular to an evaluation method for a dew point determination test of a nuclear power station compressed air dryer. The evaluation method comprises the steps of obtaining basic data; obtaining a formula of a relation curve of a pressure dew point and a normal pressure dew point under different specific pressure conditions; obtaining a general relation curve of the pressure dew point and the normal pressure dew point; substituting the test pressure dew point and the test pressure into the general relation curve to obtain a calculatedvalue of the test normal pressure dew point, and determining the test normal pressure dew point according to the normal pressure dew point temperature application range interval; substituting the testnormal pressure dew point into a general relation curve formula of the pressure dew point and the normal pressure dew point under the pressure equal to the acceptance pressure value, and converting the test pressure into the pressure dew point under the acceptance pressure; and if the pressure dew point of the test pressure converted to the acceptance pressure is less than or equal to the acceptance pressure dew point, showing the dew point of the compressed air dryer meets the acceptance requirement. According to the invention, the accuracy of compressed air dryer dew point evaluation is improved.

Description

technical field [0001] The invention relates to the field of data evaluation, in particular to an evaluation method for dew point measurement tests of compressed air dryers in nuclear power plants. Background technique [0002] Compressed air dryers are important equipment in nuclear power plants, and the availability of compressed air dryers in compressed air production systems needs to be regularly tested and verified according to the test cycle requirements. During the test verification, by measuring the dew point of the compressed air dryer, if the test pressure is the acceptance pressure, the test dew point is less than or equal to the acceptance dew point, the acceptance criterion is met, and the test result is qualified. However, the test pressure during the actual operation of the compressed air dryer is not necessarily equal to the acceptance pressure, so when evaluating the test results, it is necessary to perform pressure conversion on the dew point of the compres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M99/00G01N25/66
CPCG01M99/002G01N25/66
Inventor 陈星玥高原李晓庚王志永李振金凯陈荣添
Owner CNNC FUJIAN FUQING NUCLEAR POWER
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