Karratha Green Ammonia: Storage and Boil-off Gas Design

The team’s green ammonia concept used renewable hydrogen feed and required a two-week production buffer on site. My subsystem work followed the connection from stored inventory to tank geometry, heat entering the liquid, and the gas that would need to be handled.

I prepared the storage and boil-off gas design report, supporting spreadsheet calculations, P&ID, tank drawings and equipment specification. I also helped organise the team’s schedule at the start of the project.

Excel calculations using project stream data exported from Aspen. Methods included mass and volume relationships, hydrostatic and hoop-stress approximations, thermal-resistance and energy balances, simplified compressor and condenser calculations, and velocity-based line sizing.

• Used project product-stream data to establish the inventory and volume basis, then calculated preliminary tank dimensions and shell courses.
• Estimated heat inputs through the sidewall, roof and base, included incoming-liquid sensible heat, and translated the total into an estimated BOG flow.
• Worked through preliminary compression, condensation and cooling-water calculations, and documented proposed piping, fittings and control connections.

The output was a preliminary subsystem design package for the team project. The work gave me practice in carrying assumptions across calculations and engineering documents. My project reflection identified an improvement for future work: confirm shared assumptions and interfaces earlier, with time reserved for cross-group review.

• Subsystem design package

  My individual Design B report and supporting workbook document storage, thermal and BOG calculations. The submission also includes a P&ID, tank drawings and an equipment specification.

• Reflection on interfaces

  My Design B reflection records early scheduling work and the need to check shared assumptions and subsystem interfaces earlier.

This was preliminary coursework design. The calculations and drawings describe a proposed subsystem; they are not construction documents, measured operating results or a demonstration of verified standards compliance.