Download RETScreen - Photovoltaic Project Model

RETScreen® Photovoltaic Project Model
The annual average temperature typically ranges from -20 to 30°C, depending upon the location.
The temperature at standard conditions is 15°C.
DC energy demand for months analysed
The model calculates the DC energy demand, in MWh, for the season of use. This is calculated
from data entered in the Load Characteristics section of the Solar Resource & System Load
(SR&SL) worksheet.
AC energy demand for months analysed
The model calculates the AC energy demand, in MWh, for the season of use. This is calculated
from data entered in the Load Characteristics section of the Solar Resource & System Load
(SR&SL) worksheet.
Water demand for months analysed
The model calculates the water demand for the season of use, in m³. This is calculated from data
entered in the Load Characteristics section of the Solar Resource & System Load (SR&SL)
worksheet.
Equivalent pumping energy demand
The model calculates the amount of mechanical energy required to deliver the water demand over
the season of use, in MWh. This is purely the mechanical energy necessary to lift water from the
point of origin to the point of delivery and overcome fluid friction losses. It does not include
losses due to the inefficiency of the pump or the inefficiency of any electrical component of the
system.
System Characteristics
The system characteristics associated with estimating the seasonal energy production of a
photovoltaic system are detailed below. Some other system characteristics (particularly those
used to calculate the system load) can be found in the Load Characteristics section of the Solar
Resource & System Load (SR&SL) worksheet.
Application type
The user enters the type of PV application in the Solar Resource & System Load (SR&SL)
worksheet and it is copied automatically to the Energy Model worksheet.
There are three basic applications: On-Grid, applicable to systems without batteries and
connected to a utility grid; Off-Grid, applicable to systems with batteries and gensets; and Water
Pumping, applicable to photovoltaic water pumping systems without batteries.
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