Low-cost irradiance sensors for irradiation assessments inside tree canopies.

Muñoz García, Miguel Angel and Melado Herreros, Angela and Balenzategui, José Lorenzo and Barreiro Elorza, Pilar (2014). Low-cost irradiance sensors for irradiation assessments inside tree canopies.. "Solar Energy", v. 103 ; pp. 143-153. ISSN 0038-092X. https://doi.org/10.1016/j.solener.2014.01.027.

Description

Title: Low-cost irradiance sensors for irradiation assessments inside tree canopies.
Author/s:
  • Muñoz García, Miguel Angel
  • Melado Herreros, Angela
  • Balenzategui, José Lorenzo
  • Barreiro Elorza, Pilar
Item Type: Article
Título de Revista/Publicación: Solar Energy
Date: May 2014
ISSN: 0038-092X
Volume: 103
Subjects:
Faculty: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Department: Ingeniería Rural [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The solar irradiation that a crop receives is directly related to the physical and biological processes that affect the crop. However, the assessment of solar irradiation poses certain problems when it must be measured through fruit inside the canopy of a tree. In such cases, it is necessary to check many test points, which usually requires an expensive data acquisition system. The use of conventional irradiance sensors increases the cost of the experiment, making them unsuitable. Nevertheless, it is still possible to perform a precise irradiance test with a reduced price by using low-cost sensors based on the photovoltaic effect. The aim of this work is to develop a low-cost sensor that permits the measurement of the irradiance inside the tree canopy. Two different technologies of solar cells were analyzed for their use in the measurement of solar irradiation levels inside tree canopies. Two data acquisition system setups were also tested and compared. Experiments were performed in Ademuz (Valencia, Spain) in September 2011 and September 2012 to check the validity of low-cost sensors based on solar cells and their associated data acquisition systems. The observed difference between solar irradiation at high and low positions was of 18.5% ± 2.58% at a 95% confidence interval. Large differences were observed between the operations of the two tested sensors. In the case of a-Si cells based mini-modules, an effect of partial shadowing was detected due to the larger size of the devices, the use of individual c-Si cells is recommended over a-Si cells based mini-modules.

More information

Item ID: 23045
DC Identifier: http://oa.upm.es/23045/
OAI Identifier: oai:oa.upm.es:23045
DOI: 10.1016/j.solener.2014.01.027
Official URL: http://www.sciencedirect.com/science/article/pii/S0038092X14000450
Deposited by: Memoria Investigacion
Deposited on: 14 Mar 2014 16:13
Last Modified: 31 May 2016 22:30
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