BlendPATH v2.1.1

PyPI workflow

BlendPATH v2.1

• Dedicated hydrogen pipeline modification method
  • Builds a dedicated pure hydrogen pipeline parallel to the natural gas pipeline in a new right of way
  • Transports the targeted blend amount of hydrogen, rather than same same energy content of the original pipeline
• Improve hydraulic model computation time to enable more complex networks
• Composition tracking and mixing for varying composition at supply nodes
• Compressor bypass
  • By default, allow compressor bypass is on
  • Allow DR and PL modification methods to bypass existing compressors if that option yields lower costs
  • Bypassed compressors do not incur any refurbishment, salvage, or decommissioning cost

Authors: @topolskikevin @benjaminkee @ereznicek @bcakire

BlendPATH v2.0.4

• Improve computation time
  • Use linear interpolation of thermodynamic properties from Cantera
  • Vectorize interpolation functions
  • Reduce number of repetitive calls
  • Only update node state after solution is found
• Add segmentation of pipes at L/D > 27500
• Remove Python 3.8.19 requirement
• Fix issue where capacity may not be reported correctly
• Increase diameters for PL method to loop through
• Make more conservative pressure drop calculation for initialization
• Fix issue where extremely short pipes could be created in PL and AC method

Authors: @topolskikevin @benjaminkee @ereznicek

BlendPATH v2.0.3

-Add inline compressor to PL and AC to more accurately calculate segment hydraulics
-Update network solver to handle compressor at then end of a pipeline
-Add additional comments to PL and AC method
-Update examples and tests
-Restrict above ground valves to welded

Authors: @topolskikevin @benjaminkee @ereznicek

BlendPATH v2.0.2

-Add iteration through supply compressor outlet pressure to DR, PL, and AC methods
-Add reporting of supply compressor cost and fuel usage
-Improve DR method solution space to consider additional permutations
-Store cpcv ratio and molecular weight with composition instead of each node
-Remove duplicated thicknesses when looping through schedules
-Provide option to speedup thermodynamic evaluations through thermo_curvefit option
-Fix issue where supply compressor fuel was not reported correctly
-Fix issue where driver efficiency was referred to as mechanical efficiency

Authors: @topolskikevin @benjaminkee @ereznicek

BlendPATH v2.0.1

-Initial release of BlendPATH v2
-Open source hydraulic simulator
-Redlich-Kwong equation of state
-More comprehensive read out of results (velocity, pressure profile, etc.)
-Increase variables considered in analysis (loop through compression ratios)
-Increase number of cost override options
-Update financial input parameters
-Add ability to use %SMYS as design option
-Add electrically driven compressors
-Add customization of compressor efficiencies

Authors: @topolskikevin @benjaminkee @ereznicek

v1.0.1

BlendPATH v1.0.1

• Initial release of BlendPATH
• Employs SAInt hydraulic simulator
• Three modification methods for pipeline modification
• Calculate levelized cost of transport for the hydrogen blend after modification
• Authors: @topolskikevin @benjaminkee @ereznicek