Consider a 250 Wp rated crystalline silicon PV module. It results from a manufacturing process that consumes 8kWh/Wp of PV module.
a) What is the total energy consumed (in kWh) during the production of the module?
Assume that the PV module is used in a location where it gives an average annual PV yield of 500kWh over its lifetime of 30 years. Also assume that the Balance of System (BOS) requires a total of 1000kWh for its production.
b) What is the Energy Yield Ratio of the entire PV system over its lifetime of 30 years?
c) What is the Energy payback period for the entire PV system in years?
a 2000
b 5
C 6
thank u so mush
a) To calculate the total energy consumed during the production of the module, you need to multiply the rated power of the module (250 Wp) by the energy consumption per watt-peak (8 kWh/Wp).
Total energy consumed = Rated power × Energy consumption per watt-peak
= 250 Wp × 8 kWh/Wp
= 2000 kWh
Therefore, the total energy consumed during the production of the module is 2000 kWh.
b) To calculate the Energy Yield Ratio (EYR) of the entire PV system over its lifetime of 30 years, you need to divide the total energy yield of the PV system by the total energy input required for its production.
Total energy yield = Average annual PV yield × Lifetime
= 500 kWh/year × 30 years
= 15000 kWh
Total energy input = Energy consumed during PV module production + Energy consumed by Balance of System (BOS)
= 2000 kWh + 1000 kWh
= 3000 kWh
Energy Yield Ratio = Total energy yield / Total energy input
= 15000 kWh / 3000 kWh
= 5
Therefore, the Energy Yield Ratio of the entire PV system over its lifetime of 30 years is 5.
c) To calculate the Energy Payback Period (EPP) for the entire PV system, you need to divide the total energy input required for its production by the average annual energy yield.
Energy Payback Period = Total energy input / Average annual PV yield
= 3000 kWh / 500 kWh/year
= 6 years
Therefore, the Energy Payback Period for the entire PV system is 6 years.