The effect of batteries DOD range setting values on diesel engine generator pollution and overall cost of a hybrid solar/diesel/battery system

Abstract

Depending on applied criteria, sizing optimization process of renewable energy plants produces different optimal dimensions of the system components. This work presents a sizing algorithm of hybrid solar/diesel/battery system; where the battery depth of discharge (DOD) range setting is considered as a key to guarantee low overall system cost and minimum CO2 emission. Different DOD range setting values (0–80%, 20–80% and 40–80%) are used in the investigation in order to ensure minimization adequacy between overall system cost and pollution emission. Obtained results show that CO2 emission and system cost are sensitive for DOD setting range. Following a juxtaposition of pollution rate and system cost curves function of DOD range set values, an optimum operating point is obtained which consists of a DOD range set value of 22–80%.