Efficiency and sustainability assessment of evaporative cooling of photovoltaics

Žižak, Tej (avtor), Domjan, Suzana (avtor), Medved, Sašo (avtor), Arkar, Ciril (avtor)

The cooling of PV has been shown to increase electricity production. Among passive techniques, evaporative cooling has one of the greatest potentials. In this work, the efficiency and sustainability of this technique have been investigated for various climatic conditions. In-situ experiments were conducted to develop parametric models for PV cell temperatures and back surface convective heat transfer coefficient. Experiments have revealed an up to 20.1 °C lower peak PV temperature and up to 9.6% increased electric power. Year-round analysis was made for eight cities to determine the required roof size to capture precipitation and the volume of rainwater storage for sustainable evaporative cooling. The study shows that sustainable PV evaporative cooling is possible in cities with temperate and continental climates, where 1–3 m$^2$ of roof area and 50–150 l of rainwater storage are needed for 1 m$^2$ of PV. The annual electricity production can increase by 5.9–9.4 kWh/m$^2$a, which is a 3.6–4.6% increase. In the semi-arid climate of Lampedusa, a roof above 4 m$^2$ and a storage of up to 500 l per m$^2$ of PV are required. In the desert climate of Almeria and Athens, sustainable evaporative cooling is not feasible.

• Jezik: Angleški jezik
• Ključne besede: evaporative cooling, PV cells, in-situ experiments, cooling water demand, rainwater storage, optimization
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FS - Fakulteta za strojništvo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2022
• Št. strani: 12 str.
• Številčenje: Vol. 254, pt. A, art. 124260
• PID: 20.500.12556/RUL-136907
• UDK: 620.9
• ISSN pri članku: 0360-5442
• DOI: 10.1016/j.energy.2022.124260
• COBISS.SI-ID: 108992259
• Datum objave v RUL: 24.05.2022

Gradivo je del revije

• Naslov: Energy
• Skrajšan naslov: Energy
• Založnik: Elsevier
• ISSN: 0360-5442
• COBISS.SI-ID: 25394688

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: hlapilno hlajenje, fotonapetostne celice, meritve v naravnem okolju, voda za hlajenje, zalogovnik deževnice, optimizacija

Projekti

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Program financ.: Young researchers