Publications

Publications

Peer-reviewed articles, manuscripts in progress and research software. The article list matches my ORCID record.

Journal articles

Peer-reviewed articles

  1. 2026Journal articleOpen access

    Nonlinear operability thresholds in offshore green hydrogen production: Multi-objective system design under metocean uncertainty

    Owais Ahmad, Curran Crawford, Haris Ishaq

    International Journal of Hydrogen Energy, 277, 157530

    How do wind and wave limits on cargo transfer shape the design of an offshore hydrogen system? The study combines eleven years (2014–2024) of hourly ERA5 data for a North Atlantic and a North Sea site with an hourly production, storage and vessel model, and searches for designs with NSGA-II and NSGA-III across seven optimizer seeds. Performance responds sharply when transfer limits are strict, then levels off as transfer capability improves. The TOPSIS-selected North Atlantic design (US$8.53/kg, 1,966 t/year, 99.0% transfer success) outperformed the North Sea design (US$11.78/kg, 1,427 t/year, 89.4%); both used about 50 t of storage.

    Cite (BibTeX)
    @article{Ahmad2026Operability,
      author  = {Ahmad, Owais and Crawford, Curran and Ishaq, Haris},
      title   = {Nonlinear operability thresholds in offshore green hydrogen production: Multi-objective system design under metocean uncertainty},
      journal = {International Journal of Hydrogen Energy},
      volume  = {277},
      pages   = {157530},
      year    = {2026},
      doi     = {10.1016/j.ijhydene.2026.157530}
    }
  2. 2022Journal article

    Decentralized electrical power system in Pakistan

    Waqas Ahmad, Owais Ahmad, Afraz Ahmad, Kamran Khan

    International Journal of Engineering Works, 9(2), 47–51

    Argues for distributed generation where extending the central grid to remote, low-demand areas is inefficient, and demonstrates the principles and operation of an off-grid solar power system for a government school, framed around rural electrification in Pakistan.

    Cite (BibTeX)
    @article{Ahmad2022Decentralized,
      author  = {Ahmad, Waqas and Ahmad, Owais and Ahmad, Afraz and Khan, Kamran},
      title   = {Decentralized Electrical Power System in Pakistan},
      journal = {International Journal of Engineering Works},
      volume  = {9},
      number  = {2},
      pages   = {47--51},
      year    = {2022},
      doi     = {10.34259/ijew.22.9024751}
    }
  3. 2021Journal article

    Design, performance and feasibility assessment of solar PV system for irrigation

    Owais Ahmad, Afraz Ahmad, Waqas Ahmad, Kamran Khan

    International Journal of Engineering Works, 8(12), 294–297

    Designs a solar-PV system to irrigate a wheat field in Pakistan and evaluates it through the performance ratio, a system loss diagram and a lifecycle cost analysis.

    Cite (BibTeX)
    @article{Ahmad2021Irrigation,
      author  = {Ahmad, Owais and Ahmad, Afraz and Ahmad, Waqas and Khan, Kamran},
      title   = {Design, Performance and Feasibility Assessment of Solar PV System for Irrigation},
      journal = {International Journal of Engineering Works},
      volume  = {8},
      number  = {12},
      pages   = {294--297},
      year    = {2021},
      doi     = {10.34259/ijew.21.8012294297}
    }
  4. 2021Journal article

    Rooftop PV systems development in Khyber Pakhtunkhwa: Barriers and smart policy recommendations

    Afraz Ahmad, Owais Ahmad, Waqas Ahmad, Kamran Khan

    International Journal of Engineering Works, 8(12), 298–304

    Estimates usable rooftop area for solar PV through geospatial analysis (satellite-image digitization and ArcGIS), compares energy demand and supply in Khyber Pakhtunkhwa, and identifies technical and policy barriers with recommendations for future planning.

    Cite (BibTeX)
    @article{Ahmad2021Rooftop,
      author  = {Ahmad, Afraz and Ahmad, Owais and Ahmad, Waqas and Khan, Kamran},
      title   = {Rooftop PV Systems Development in Khyber Pakhtunkhwa: Barriers and Smart Policy Recommendations},
      journal = {International Journal of Engineering Works},
      volume  = {8},
      number  = {12},
      pages   = {298--304},
      year    = {2021},
      doi     = {10.34259/ijew.21.8012298304}
    }

In progress

Manuscripts in preparation and revision

Working titles from my doctoral research on remote community microgrids. Details will be added when the articles are accepted.

Remote microgrids

In preparation / revision

Multi-objective design and MILP-based model predictive dispatch for remote community hybrid renewable microgrids

Full-year comparison of mixed-integer model predictive dispatch with load-following control for renewable, storage and diesel microgrids.

Lifecycle emissions

In revision

Quantifying true lifecycle emissions: operational-only versus lifecycle-aware optimization of remote microgrids

How optimizing for operational emissions alone compares with lifecycle-aware optimization of the installed equipment.

Research software

Software

2026SoftwarePre-release · v0.4.0-alpha.4

OffshoreLH2: Offshore liquid hydrogen system simulation, logistics, techno-economics, and optimization

Owais Ahmad

Research platform with a C++20 simulation core, Python SDK and PySide6 desktop application for chronological simulation, optimization and techno-economic analysis of offshore hydrogen systems. The repository is private during pre-release review. Citation metadata (CITATION.cff) is included, and an archived release with a DOI is planned.