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Assessing sizing optimality of OFF-GRID AC-linked solar PV-PEM systems for hydrogen production
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Heat and Power Technology.ORCID iD: 0000-0003-0277-5080
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Heat and Power Technology.
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2022 (English)In: International journal of hydrogen energy, ISSN 0360-3199, E-ISSN 1879-3487Article in journal (Refereed) Published
Abstract [en]

Herein, a novel methodology to perform optimal sizing of AC-linked solar PV-PEM systems is proposed. The novelty of this work is the proposition of the solar plant to electrolyzer capacity ratio (AC/AC ratio) as optimization variable. The impact of this AC/AC ratio on the Levelized Cost of Hydrogen (LCOH) and the deviation of the solar DC/AC ratio when optimized specifically for hydrogen production are quantified. Case studies covering a Global Horizontal Irradiation (GHI) range of 1400–2600 kWh/m2-year are assessed. The obtained LCOHs range between 5.9 and 11.3 USD/kgH2 depending on sizing and location. The AC/AC ratio is found to strongly affect cost, production and LCOH optimality while the optimal solar DC/AC ratio varies up to 54% when optimized to minimize the cost of hydrogen instead of the cost of energy only. Larger oversizing is required for low GHI locations; however, H2 production is more sensitive to sizing ratios for high GHI locations.

Place, publisher, year, edition, pages
Elsevier, 2022.
Keywords [en]
Solar hydrogen, Techno-economic analysis
National Category
Energy Systems
Identifiers
URN: urn:nbn:se:kth:diva-315607DOI: 10.1016/j.ijhydene.2022.06.098ISI: 000864187600001Scopus ID: 2-s2.0-85133785937OAI: oai:DiVA.org:kth-315607DiVA, id: diva2:1682987
Funder
Swedish Energy Agency
Note

QC 20221024

Available from: 2022-07-13 Created: 2022-07-13 Last updated: 2022-10-24Bibliographically approved

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Gallardo, FelipeGarcía, JoséChiu, Justin NingWei

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