Renewable Energy Resources

pump water into cells and run it through thin pipes to increase surface area water heats up

bathing, washing, space heating

windows on south facing walls elongate buildings - largest wall = south facing light stone = reflects light, dark stone = absorbs light

heat pump contains liquid with very low BP, so gas at low temperatures liquid raises its temp in the panel gas is compressed to liquid, releasing energy in the form of heat heat exchanger used to heat water

doped with phosphorus adds electrons

doped with boron electron deficient

excess electrons on N-type side gain energy from the Sun electrons move to P-type side continuous movement of electrons creates a current

silicon

renewable reduces electricity bills low operating costs versatile applications predictable

high initial costs intermittent habitat loss due to space requirements energy storage costs limited energy production made of finite materials recovered by mining low energy density

highest solar energy use per capita 10% of electricity in 20-21 more than 30% of households have rooftop photovoltaics

device with mirrors that reflect sunlight towards a specific point to generate electricity mirrors move for optimum angle

curved mirror that focuses rays of light onto a single point

large scale thousands of mirrors reflecting to central point, often on top of tower salt heated to over 100 degrees, molten salt retains heat longer/ after Sun’s gone

bumpy/ grooved solar panel surfaces = higher surface area mimic structure of moth corneas

more layers than traditional photovoltaic cells each layer absorbs different wavelengths of light, more light absorbed, more energy produced

reduces energy lost during conversion

used as windows increases amount of cells that can be put on buildings

hydrophobic outer layer rain runs off and removes dirtt

large catchment high and regular rainfall steep sided valley with impermeable rock no seismic activity low turbidity close to grid system/end user

use natural downward flow of river to utilise kinetic energy significant drop in elevation (100m+)

less than 15m drop utilises existing weirs

harvest the energy from flowing water

renewable low emissions reliable energy storage flood control