Boreholes up to 2.8 miles deep will extract thermal energy to produce electricity for around 7,000 homes

Power plant

Water

reused

1

Water is

injected

into the well

3

Hot water up to

195C is extracted

and the water

vapour used to

drive turbines

Insulating

sediment

Naturally hot

granite rock

1.6

miles

2.8

miles

2

Water flows

through permeable

pathways picking

up heat from the

surrounding rocks

Redruth

Water heated to 195C

Power plant

Water

reused

1

Water is injected

into the well

3

Hot water up to

195C is extracted

and the water

vapour used to

drive turbines

Insulating sediment

Naturally hot

granite rock

1.6

miles

2.8

miles

2

Water flows

through permeable

pathways picking

up heat from the

surrounding rocks

Redruth

Water heated to 195C