| Yield {wflo} | R Documentation |
Returns yearly yield for a turbine's location.
Description
For a turbine's location represented by x and y, looks up the (adjusted) yield from the matrix Adj. Internally transforms coordinates of x and y from problem space (usually unit square) to the matrix space of Adj.
Usage
Yield(x, y, Adj)
Arguments
x |
must be a single value containing the 'x' location of a turbine in problem space. |
y |
must be a single value containing the 'y' location of a turbine in problem space. |
Adj |
a matrix containing adjusted yields. Usually, the first element of the list object |
Details
Adjusted yields are the projected yearly average yields dependent on wind speed, hub height and other settings at each point in the raster data. Annual Energy Production (AEP) at a specific location, weighted by a location quality correction factor, produces adjusted yields. This adjustment returns a better guess on the marketable yield at a specific point. For details on the data, see the data set description to this package.
Note that Profit internally multiplies the outcome of Yield by e$FarmVars$Price to obtain revenue. Users who replace the function by e$Yield need to provide that manually, if revenue is desired.
Value
Yield returns a single value.
Author(s)
Carsten Croonenbroeck
See Also
Profit to see where to use Yield, Cost for a similar function for yearly cost. FarmData for the data set.
Examples
## Returns adjusted yield for the given location.
Adj <- FarmData[[1]][e$FarmVars$StartPoint:e$FarmVars$EndPoint,
e$FarmVars$StartPoint:e$FarmVars$EndPoint]
Yield(0.5, 0.7, Adj)
## Replace the function by another function
## also called 'Yield', embedded in environment e.
## Also, see the vignette.
## Not run:
e$Yield <- function(x, y, AEP) #x, y \in R
{
return(x + y)
}
set.seed(1357)
NumTurbines <- 4 # For example.
Result <- pso::psoptim(par = runif(NumTurbines * 2), fn = Profit,
lower = rep(0, NumTurbines * 2), upper = rep(1, NumTurbines * 2))
Result
rm(Yield, envir = e)
## End(Not run)