Photovoltaic Evaporative Chimney I–V Measurement System

Pablo Casado, José M. Blanes, Francisco Javier Aguilar Valero, Cristian Torres, Manuel Lucas Miralles and Javier Ruiz Ramírez
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Pablo Casado: Industrial Electronics Group, Miguel Hernández University of Elche, Avda. de la Universidad, s/n, 03202 Elche, Spain
José M. Blanes: Industrial Electronics Group, Miguel Hernández University of Elche, Avda. de la Universidad, s/n, 03202 Elche, Spain
Francisco Javier Aguilar Valero: Department of Mechanical Engineering and Energy, Miguel Hernández University of Elche, Avda. de la Universidad, s/n, 03202 Elche, Spain
Cristian Torres: Industrial Electronics Group, Miguel Hernández University of Elche, Avda. de la Universidad, s/n, 03202 Elche, Spain
Manuel Lucas Miralles: Department of Mechanical Engineering and Energy, Miguel Hernández University of Elche, Avda. de la Universidad, s/n, 03202 Elche, Spain
Javier Ruiz Ramírez: Department of Mechanical Engineering and Energy, Miguel Hernández University of Elche, Avda. de la Universidad, s/n, 03202 Elche, Spain

Energies, 2021, vol. 14, issue 24, 1-14

Abstract: The photovoltaic evaporative chimney is a novel solar-cooling system that serves a double purpose: it increases the efficiency of the photovoltaic (PV) panels and it cools down a water stream which can be used to dissipate the heat from a refrigeration cycle. One of the major issues arising from the operation of the chimney is the temperature stratification in the panel due to the movement of the air in the chimney. This effect can trigger the activation of the bypass diodes of the module, creating local maximum power points (MPP) that can compromise the grid-tied inverter tracking. To fill this gap, this paper deals with the design and implementation of an I–V curve measurement system to be used in the performance analysis of the system. The I–V curve tracer consists of a capacitive load controlled by a single board computer. The final design includes protections, capacitor charging/discharging power electronics, remote commands inputs, and current, voltage, irradiance, and temperature sensors.The results show that the modules bypass diodes are not activated during the tests, and no local MPPs appear. Moreover, the curves measured show the benefits of the photovoltaic chimney: the cooling effect increases the power generated by the PV panels by around 10%.

Keywords: solar cooling; PV; I–V curves (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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