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Assessment of error due to orifice diameter mis-measurement

Assessment of error due to orifice diameter mis-measurement. Michael Reader-Harris TUV NEL Scotland. Introduction. Orifice diameters have been mis-measured The aim of this project is to calculate the error

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Assessment of error due to orifice diameter mis-measurement

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  1. Assessment of error due to orifice diametermis-measurement Michael Reader-Harris TUV NEL Scotland

  2. Introduction • Orifice diameters have been mis-measured • The aim of this project is to calculate the error • Actual calculations were carried out first for Blackrod (2 orifice runs), initially in percentage terms

  3. Correction factors for Blackrod: volume or energy

  4. Daily flow corrections required • For each (approximately four-minute) interval the flow was divided between Tubes A and B. • For each day the flow can thus be divided between Tubes A and B. • The correction for each day can thus be calculated.

  5. Blackrod report • Calibration certificates have been added. • Configuration data reports have been added. • Daily corrections have been added. • An Excel spreadsheet has been produced to enable the results for one 24-hour period to be checked.

  6. Period 16/07/07 to 02/07/09

  7. 24 more sites • We are calculating correction factors. • They will be applied to the daily data. • Report(s) will be produced.

  8. Audley

  9. Austrey

  10. Blaby

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