Sun
Energy from the sun is called?
Solar radiation
What material transfers heat through conduction?
Solids
What is the single unit within in a photovoltaic pannel?
Cell
How are wind and hydro power similar?
Both use turbines to create electricity
When orientating a solar array or solar hot water service, what is the prefered orientation?
North
The average hours of sunlight are known as
Sunshine hours
What materials transfer heat through convection?
Liquids and Gasses
What is the unit called that has a robust protectiving housing and a up to 72 of single parts connected in series with the structure?
Module
What is the name given to hte electricity created from decomposing plant and animal material?
Biomass
What are two temperature units that we use?
Celsius and Kelvin
What is the area of the sky through which the sun moves throughout each yearly cycle called?
Solar Window
What term do we use to describe the layering of a liquid or gas based on density?
Stratification
How can strings of solar pannels be connected?
In series or in parrallel
What are 2 important factor when selecting a wind farm site?
Topography, Mean wind speed,
PV create what type of electric current?
DC
What is the name of the angle between the sun and true north in a clockwise direction?
Azimuth Angle
Radiant heat from the sun can be used to heat water how else is this used on an larger scale?
e.g. Concerntrate heat onto a reciever using mirrors.
If one solar pannel is shaded what could be used to remove this from hte circuit?
A bypass diode
Name four types of electricity that use water?
Hydro, Tidal, Wave, Geothermal
What is the main disadvantages of solar pannels?
Can't generate electricity at night.
What are 4 factors should be considered when deciding on the location of the soalr array?
Seasonal change, Shading, cloud cover, time of day
How is wind created?
Differential heating of the air in the atmosphere by the sun.
Explain the relationship between temperature and voltage output of a PV cell.
As temperature increases voltage decreases.
What are the three types of energy transformation that occur in a hydro system?
Potential, mechanical and electrical
What are the benefits of Wind and Hydro electricity generation, what is one limitation of each?
Can generate at night, Wind can't generate if there is no wind, Hydro can't generate if there is no water.