Hydrogen Mitigation Process Testing at Nevada Solar One: Paper No. 100001

Greg Glatzmaier, Koenraad Beckers

Research output: Contribution to conferencePaper

Abstract

The National Renewable Energy Laboratory (NREL) and Acciona Solar Power (ASP) developed and installed a process that addresses the issue of hydrogen buildup in Acciona's Nevada Solar One power plant. Our method selectively removes hydrogen from the expansion tanks of the power plant to control hydrogen levels in the circulating heat-transfer fluid (HTF). During previous work, we developed a sensor that measures hydrogen partial pressure in the expansion-tank headspace gas. We demonstrated that our sensor measures hydrogen levels over a wide range of partial pressure from 10 mbar down to 0.003 mbar. More recently, we conceived and developed an integrated process module that performs both hydrogen sensing and separating functions. The sensor/separator measures hydrogen partial pressure in the headspace gas in the same way as our original sensor design. Additionally, the integrated module separates hydrogen from the headspace gas to reduce hydrogen to the level needed to maintain the performance of receivers in the collector field. Laboratory testing at NREL showed that the sensor function had an accuracy of +/-7%, and the hydrogen extraction rate for separator function was consistent with our modeling predictions. The primary benefit of this module is its simple design, both in terms of function and incorporation into the HTF subsystem of the power plant. Most recently, NREL and ASP completed installation and initial testing of a mitigation process at ASP's Nevada Solar One power plant in Boulder City, Nevada. In this paper, we report on the completed installation, initial testing, and plans to bring the process to full automation, so that it can be operated unattended on a daily schedule.
Original languageAmerican English
Number of pages8
DOIs
StatePublished - 2022
EventSOLARPACES 2020: 26th International Conference on Concentrating Solar Power and Chemical Energy Systems - Freiburg, Germany
Duration: 28 Sep 20202 Oct 2020

Conference

ConferenceSOLARPACES 2020: 26th International Conference on Concentrating Solar Power and Chemical Energy Systems
CityFreiburg, Germany
Period28/09/202/10/20

NREL Publication Number

  • NREL/CP-5700-83283

Keywords

  • chemical elements
  • heat transfer
  • power plants
  • solar energy

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