A stand-alone photo voltaic (PV) system for operating a street light consists of a PV array, storage battery, controller and DC-AC inverter o which an LED bulb of 20 Watts is connected. The PV array consists of 2 modules each containing 36 single crystal Si cells, each of 10 cm diameter. Conversion efficiency of the PV cells is 11%. The battery has an efficiency of 0.82 both while charging and discharging. DC-AC inverter has an efficiency of 0.85 while discharging the energy. The PV array receives solar radiation of approximately 22,600 kJ/m? per day. i. If the controller switches on the street light at 18:00 hrs, find the time when the street light would be switched off because of complete battery discharge. Calculate the energy stored in the battery on this day. ii.
A stand-alone photo voltaic (PV) system for operating a street light consists of a PV array, storage battery, controller and DC-AC inverter o which an LED bulb of 20 Watts is connected. The PV array consists of 2 modules each containing 36 single crystal Si cells, each of 10 cm diameter. Conversion efficiency of the PV cells is 11%. The battery has an efficiency of 0.82 both while charging and discharging. DC-AC inverter has an efficiency of 0.85 while discharging the energy. The PV array receives solar radiation of approximately 22,600 kJ/m? per day. i. If the controller switches on the street light at 18:00 hrs, find the time when the street light would be switched off because of complete battery discharge. Calculate the energy stored in the battery on this day. ii.
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Transcribed Image Text:A stand-alone photo voltaic (PV) system for operating a street light consists of a PV array,
storage battery, controller and DC-AC inverter o which an LED bulb of 20 Watts is
connected. The PV array consists of 2 modules each containing 36 single crystal Si cells, each
of 10 cm diameter. Conversion efficiency of the PV cells is 11%. The battery has an efficiency
of 0.82 both while charging and discharging. DC-AC inverter has an efficiency of 0.85 while
discharging the energy. The PV array receives solar radiation of approximately 22,600 kJ/m?
per day.
i.
If the controller switches on the street light at 18:00 hrs, find the time when the
street light would be switched off because of complete battery discharge.
Calculate the energy stored in the battery on this day.
ii.
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