Hydrogen reduction in heat transfer fluid in parabolic trough CSP plants

Hydrogen (H2) has been found to be generated in very small proportions when diphenyl oxide/ biphenyl heat transfer fluid (HTF) is operated at temperatures close to 400°C. At such temperatures, H2 can permeate through steel walls to the vacuum space of parabolic trough (PT) solar receivers, where it...

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Bibliographic Details
Main Authors: Lang, Christoph, Belkheir, Mohamed, Kim, Eungkyu, Davidson, Chet, Holden, Bruce, Hook, Bruce
Format: Conference Proceeding
Language:English
Subjects:
Economic impact
Gas separation
Heat
Heat transfer
Hydrogen reduction
Impact analysis
Power plants
Receivers
Reduction
Steel structures
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Summary:Hydrogen (H2) has been found to be generated in very small proportions when diphenyl oxide/ biphenyl heat transfer fluid (HTF) is operated at temperatures close to 400°C. At such temperatures, H2 can permeate through steel walls to the vacuum space of parabolic trough (PT) solar receivers, where it increases heat losses that can significantly impact the economics of PT concentrated solar power plants. A novel process for the reduction of the H2 concentration in HTF via stripping and gas separation has been simulated for the operation in PT CSP plants. Applying the proposed process, the concentration of H2 in HTF can be reduced down to 1 ppb. A cost comparison between the H2 separation process and frequent PT receivers replacement was conducted and found that proposed H2 removal process is more economic.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.4984501