Measurement of Hydrogen Purge Rates in Parabolic Trough Receiver Tubes: Preprint

Gregory Glatzmaier

Research output: Contribution to conferencePaper

Abstract

The purpose of this research is to investigate and develop methods to remove hydrogen centrally from commercial parabolic trough power plants. A mathematical model was developed that tracks the generation and transport of hydrogen within an operating plant. Modeling results predicted the steady-state partial pressure of hydrogen within the receiver annuli to be~1 torr. This result agrees withmeasured values for the hydrogen partial pressure. The model also predicted the rate at which hydrogen must be actively removed from the expansion tank to reduce the partial pressure of hydrogen within the receiver annuli to less than 0.001 torr. Based on these results, mitigation strategies implemented at operating parabolic trough power plants can reduce hydrogen partial pressure to acceptablelevels. Transient modeling predicted the time required to reduce the hydrogen partial pressures within receiver annuli to acceptable levels. The times were estimated as a function of bellows temperature, getter quantity, and getter temperature. This work also includes an experimental effort that will determine the time required to purge hydrogen from a receiver annulus with no getter.
Original languageAmerican English
Number of pages11
StatePublished - 2010
EventSolarPACES 2010 - Perpignan, France
Duration: 21 Sep 201024 Sep 2010

Conference

ConferenceSolarPACES 2010
CityPerpignan, France
Period21/09/1024/09/10

NREL Publication Number

  • NREL/CP-5500-49366

Keywords

  • decomposition
  • hydrogen
  • modeling
  • parabolic trough
  • permeation

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