PSI - Issue 77

Arian Semedo et al. / Procedia Structural Integrity 77 (2026) 498–511 Arian Semedo and João Garcia/ Structural Integrity Procedia 00 (2026) 000–000

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Fig. 2. Climatic conditions in Tarrafal de Santiago, including average temperature, humidity, and wind speed, based on 30 years of historical data.

The preservation of fishery products requires strict control of both storage temperature and relative humidity to ensure safety and quality. Chilled fish is stored between 0–2 °C with 95–100% relative humidity, whereas frozen products are maintained betwee n −30 and −20 °C with 90 –95% relative humidity. These conditions are essential to minimize dehydration, oxidative degradation, and surface crystallization. From an energy integration perspective, the proposed system combines photovoltaic, wind, and tidal current resources. Photovoltaic generation was estimated using an average solar irradiation of 159,730 Wh/m² and 5.2 peak sun hours, with a total of 51 PV modules (180 m²), yielding an average production of approximately 123.5 kWh/day. Marine current energy was assessed considering an average flow velocity of 6 km/h at a depth of 30 m, adjusted through hydrodynamic correction models. Wind energy was modelled using an average wind speed of 26 km/h at a hub height of 64 m, suitable for small- to medium-scale turbines. Figure 3 illustrates the schematic of the integrated system, highlighting the refrigeration subsystems, renewable energy inputs, and the defined environmental and operational assumptions adopted to ensure consistency and reproducibility of the analysis.

Fig. 3. Schematic diagram of the proposed system, illustrating the refrigeration subsystems and integrated renewable energy technologies

The methodological framework employed in this study involved, first, the specification of reference environmental conditions and the thermal requirements of the refrigeration system. This was followed by the preliminary configuration of the renewable energy system under multiple operational scenarios. The potential energy yield of the selected renewable sources was then quantified, after which the individual