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pcsol

R code for the paper: "Clear sky solar irradiance models: a review of seventy models", Fernando Antonanzas, Ruben Urraca, Jesus Polo, Oscar Perpiñán, Rodrigo Escobar, Renewable and Sustainable Energy Reviews, Volume 107, 2019, Pages 374-387, ISSN 1364-0321,2019, 10.1016/j.rser.2019.02.032.

Installation

You may either clone the repository with git or download a ZIP file with its content.

  • Clone with git: git clone git://github.com/EDMANSolar/pcsol

  • Download a ZIP file.

Usage

Once cloned or downloaded, the repository provides a main function named clearSky. This function is an interface to the set of seventy models. These models can be inspected in the file clearSky.R located in the R_code folder.

Use the next code to load the required package, solaR, configure the working directory, and load the functions, and the list of models:

setwd('NAME_OF_YOUR_FOLDER') ## replace the text

source('R_code/clearSky.R')

source('R_code/csMother.R')

The function clearSky has three arguments:

  • meteo: a time series of meteorological measurements, including the variables required by the corresponding model. This time series must be a zoo object (see zoo package).

  • loc: coordinates of the location where the model is to be evaluated. It must be a list or data.frame with elements lon (longitude) and lat (latitude).

  • model: name of the model to be evaluated. It must be included in the set of seventy models implemented in this code. This list can be obtained with print(csModels).

The repository includes the two datasets used in the paper:

## cabauw data.frame
load('data_example/cabauw.RData')
## carpentras data.frame
load('data_example/carpentras.RData')

The coordinates of these stations are available in the stations.csv file located in the data_example folder:

BSRNcc <- read.csv('data_example/stations.csv')

For example, the next code evaluates the ASHRAE1972 model in Cabauw:

cabauwASHRAE <- clearSky(meteo = cabauw, loc = BSRNcc[1, ], model = "ASHRAE1972")

The result is a zoo object with three components, G0, D0, and Bn. Next code display a comparison with the measurements:

plot(cabauwASHRAE$G0, cabauw$G0, xlab = 'model', ylab = 'measurements')

The file evalCode.R in the R_code folder evaluates the whole set of models in the two stations, and creates target diagrams to show the model statistics using the tdr package.

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a set of functions to compute solar irradiance under clear sky conditions

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