Research-stage literature benchmark
Taccani compressed-H₂ loading
An adiabatic compressed-hydrogen carrier loading case. The primary mass gate currently fails and is intentionally preserved as an open evidence issue.
Acceptance rule
Final hydrogen mass on board at 300 bar must be within 5% of the published value. Current deviation: −7.6%.
Source
Taccani, R.; Maggiore, G.; Micheli, D. (2020), “Development of a process simulation model for the analysis of the loading and unloading system of a CNG carrier equipped with novel lightweight pressure cylinders,” Applied Sciences 10, 7555.
Values taken from the paper
| Input | Value | Source |
|---|---|---|
| Ship water volume | 44,800 m³ | Table 2 |
| Final/design pressure | 300 bar | Tables 2 and 4 |
| Initial cargo state | 30 bar, 40 °C | Sections 6.1–6.2 |
| Storage volume | 2 × ship volume | Section 6.1 |
| Storage initial pressure | 240 bar | Section 6.1 |
| Cooler outlet temperature | 40 °C | Section 6.1 |
| Compression arrangement | Two-stage; two compressors in parallel | Section 6.1 |
| Maximum polytropic efficiency | 0.73 | Section 6.1 |
| Hydrogen loading thermal boundary | Adiabatic | Section 7 / Table 4 case |
Generated comparison
| Metric | Published | OffshoreLH2 | Deviation | Basis | Status |
|---|---|---|---|---|---|
| Mass on board at 300 bar | 724 t | 668.7 t | −7.6% | Independent, 5% tolerance | FAIL |
| Initial mass at 30 bar / 40 °C | 100.6 t implied | 102.3 t | +1.7% | Descriptive | REPORTED |
| Compressor energy | 163.6 MWh | 74.18 MWh | −54.7% | Descriptive | REPORTED |
| Specific compression energy | 945 kJ/kg loaded | 471.5 | −50.1% | Descriptive | REPORTED |
Why it remains open. The paper’s free pressure-driven inflow/throttling treatment, storage temperature, centrifugal compressor maps and control details are not fully specified for reproduction. OffshoreLH2 matches an independent energy-balance interpretation better than it matches the published loading result, so the discrepancy is kept visible rather than tuning the model to force a pass.
Reproducibility
Source register: python/offshore_lh2/data/carrier_benchmark_references.json. Runner: scripts/run_carrier_benchmarks.py.