Solar Flashcards
(13 cards)
What are two types of thermal systems
1) non-tracking and Non-concentrating
2) tracking and concentrating
What kind of star is the sun
yellow dwarf
what is solar irradiance
a measure of the irradiance produced by the Sun in the form of electromagnetic radiation
[W//m^2]
What is Solar insolation
the total amount of solar radiation energy received on a given surface area during a given time
[kWh/m^2day]
irradiance x Time collected = insolation
What is a passive solar configuration
- fixed location
- fixed angle
- should be oriented south (0 degrees (180) Azimuth angle
- elevation should = latitude
What is a active solar configuration
- can be concentrating or non-concentrating
What is a concentrating PV system
- parabolic dish with a Fresnel lens and a heliostat used to increase solar intensity in a concentrated area
What is a non-concentrating PV system
- flat panel for simple collection
- lowest collection efficiency
What does a photovoltaic system do
converts sunlight directly to electricity
what is a photovoltaic system made of
Silicone wafer in crystalline for is dominant material
what is the most efficient crystalline’s to use
monocrystalline (~25%)
polycrystalline/Hetero (20~25%)
amorphous/Thin film (
What are some limitations when using a PV system
- intermittent supply / non-constant
- relatively low intensity
- energy supply may not match demand (storage requirements)
What components are required in a PV system
- Charge Controller
- ## Inverter
