ELECTRICAL PERFORMANCE OF A WATER-COOLED PVT SYSTEM WITH FORCED AND NATURAL CIRCULATION

Antunes, Bruno M.; Jordan, Rodrigo A.; Motomiya, Anamari V. de A.; Santos, Rodrigo C.; Moreira Júnior, Orlando

doi:10.1590/1809-4430-Eng.Agric.v42nepe20220108/2022

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Scientific Paper, Special Issue: Energy in Agriculture • Eng. agríc. 42 (spe) • 2022 • https://doi.org/10.1590/1809-4430-Eng.Agric.v42nepe20220108/2022 copy

ELECTRICAL PERFORMANCE OF A WATER-COOLED PVT SYSTEM WITH FORCED AND NATURAL CIRCULATION

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

This study evaluated the electrical performance of a photovoltaic-thermal (PVT) system using water as a cooling fluid (PVT/w), with adaptation, in a photovoltaic module of a device for heating water without direct contact with the cell and with air as the secondary working fluid. The PVT/w system with forced and natural circulation was compared in a regime of thermal accumulation of hot water and supply by a boiler reservoir relative to the same PV panel with the original factory characteristics. The average system temperature, open circuit voltage, current and voltage with load, and generated electric power were analyzed during seven non-consecutive days, with ten repetitions every thirty minutes between 9:30 am and 2:00 pm in the city of Dourados-MS, Brazil, between June and July 2021. The PVT system with forced circulation (PVT/w_CB) presented the best electrical performance compared to the PVT system with natural circulation (PVT/w_SB), in the order of 3.7%.

Boiler; photovoltaic-thermal panel; thermal accumulation

Day	Tmean (°C)	TM (°C)	Tm (°C)	U2 (m s ⁻¹ )	Rs (kWh m ⁻² day ⁻¹ )
June 23	21.3	28.2	14.5	0.73	3.92
July 2	12.1	27.1	−2.3	0.25	4.50
July 12	18.1	31.2	5.7	0.37	4.42

Mean	17.2	28.8	6.0	0.45	4.28

Day	Tmean (°C)	TM (°C)	Tm (°C)	U2 (m s ⁻¹ )	Rs (kWh m ⁻² day ⁻¹ )
July 5	15.4	28.8	3.6	0.20	4.28
July 7	16.1	27.2	4.5	0.33	4.25
July 9	16.4	28.2	4.4	0.30	4.56
July 13	19.3	32.2	6.4	0.35	4.50

Mean	16.8	29.1	4.7	0.30	4.40

Measurement	PVT/w_CB		PV

	Average panel temperature (°C)	Electrical performance (W m ⁻² )	Average panel temperature (°C)	Electrical performance (W m ⁻² )
June 23	52.08	74.27	45.85	78.53
July 2	53.13	75.47	47.11	79.77
July 12	57.79	72.29	51.63	76.10

Mean	54.34	74.01	48.20	78.13

Measurement	PVT/w_SB		PV

	Average panel temperature (°C)	Electrical performance (W m ⁻² )	Average panel temperature (°C)	Electrical performance (W m ⁻² )
July 5	55.77	71.68	48.86	75.70
July 7	58.65	71.57	50.35	75.99
July 9	60.15	71.17	52.32	75.91
July 13	60.89	71.18	53.59	76.03

Mean	58.87	71.40	51.28	75.91

Associação Brasileira de Engenharia Agrícola SBEA - Associação Brasileira de Engenharia Agrícola, Departamento de Engenharia e Ciências Exatas FCAV/UNESP, Prof. Paulo Donato Castellane, km 5, 14884.900 | Jaboticabal - SP, Tel./Fax: +55 16 3209 7619 - Jaboticabal - SP - Brazil
E-mail: revistasbea@sbea.org.br

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[1] 1* Corresponding author. Universidade Federal da Grande Dourados - UFGD/Dourados - MS, Brasil. E-mail: brunomachadoantunes@hotmail.com | ORCID ID: https://orcid.org/orcid.org/0000-0002-4222-0787