Discharging Through an Orifice Determines Steam-Water Enthalpy

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A wide range of steam-water mixtures was discharged to the atmosphere through a 10.7 mm diameter orifice which was sharp-edged with a minuscule throat pressure tapping. The ratio of throat pressure to up-stream pressure was found sensitive to dryness fraction over the whole range studied from 0.03 to 1.0. The technique (employing large orifices) has the potential of identifying the unknown enthalpy of geothermal wells discharging large flows. Contrariwise, a nozzle (rounded entry orifice) was found remarkably _insensitive_ over most of the dryness range and hence is useless for such determinations; however, it can be used to measure the flow-rate ... continued below

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301-304

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James, Russell January 20, 1987.

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A wide range of steam-water mixtures was discharged to the atmosphere through a 10.7 mm diameter orifice which was sharp-edged with a minuscule throat pressure tapping. The ratio of throat pressure to up-stream pressure was found sensitive to dryness fraction over the whole range studied from 0.03 to 1.0. The technique (employing large orifices) has the potential of identifying the unknown enthalpy of geothermal wells discharging large flows. Contrariwise, a nozzle (rounded entry orifice) was found remarkably _insensitive_ over most of the dryness range and hence is useless for such determinations; however, it can be used to measure the flow-rate when enthalpy is known. 2 figs., 7 refs.

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301-304

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  • Proceedings, Twelfth Workshop on Geothermal Reservoir Engineering, Stanford University, Stanford, Calif., January 20-22, 1987

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  • Report No.: SGP-TR-109-44
  • Grant Number: AT03-80SF11459
  • Grant Number: AS07-84ID12529
  • Office of Scientific & Technical Information Report Number: 888642
  • Archival Resource Key: ark:/67531/metadc885266

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  • January 20, 1987

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  • Sept. 21, 2016, 2:29 a.m.

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  • Nov. 23, 2016, 4:01 p.m.

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James, Russell. Discharging Through an Orifice Determines Steam-Water Enthalpy, article, January 20, 1987; United States. (digital.library.unt.edu/ark:/67531/metadc885266/: accessed August 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.