Maps of solar radiation

Etiquetas

CRAN, GNU General Public License, nasa, photovoltaics, R, R-project, solar, solar radiation

The Atmospheric Science Data Center (ASDC) at NASA Langley Research Center offers several data sources. For example, it is possible to download a text file with the 22-year (July 1983 – June 2005) monthly and annual average of global horizontal irradiation.

nasafile <- 'http://eosweb.larc.nasa.gov/sse/global/text/global_radiation'
nasa <- read.table(file=nasafile, skip=13, header=TRUE)

With this data, R and the solaR package we can calculate (for example) the global effective irradiation incident on several surfaces: a fixed PV generator, a two-axis tracker and a N-S horizontal tracker. First, let’s plot the original data using some spatial packages:

New version of solaR (0.21)

Etiquetas

CRAN, GNU General Public License, photovoltaics, R-project, solar

The version 0.21 of the solaR package is now available at CRAN. This package provides a set of calculation methods of solar radiation and performance of photovoltaic systems. The package has been uploaded to CRAN under the GPL-3 license.

solaR is now able to calculate from both daily and sub-daily irradiation values. Besides, there are more changes: NEWS. Anyway, you are invited to read the introduction vignette in order to learn the most important funcionalities of solaR.

New version of solaR

Etiquetas

CRAN, GNU General Public License, photovoltaics, R-project, solar

The version 0.2 of the solaR package is now available at CRAN. This package provides a set of calculation methods of solar radiation and performance of photovoltaic systems. The package has been uploaded to CRAN under the GPL-3 license.

The most important changes included in this version are:

• The package is now almost entirely designed with S4 classes and methods.
• The time series objects are constructed with the ‘zoo‘ package.
• Most of the functions and arguments have been renamed in order to ease the understanding by international users.
• Two new functions have been included for the statistical analysis of a PV plant composed of several systems.
• The package dependencies have been optimized.
• Several new small functions for date-time calculations are now available.
• Several bugs have been corrected.

Besides, an introduction to this package is available as a vignette (both in English and in Spanish).

Versión 0.14 de solaR publicada en CRAN

Etiquetas

CRAN, GNU General Public License, photovoltaics, R-project, solar

Ya está disponible la primera versión pública de solaR, un paquete de cálculo de radiación solar y funcionamiento de sistemas fotovoltaicos basado en R-project. Hay más información en esta página de mi blog.