d1-2 10.50 technological developments and innovative solutions. gage williams, west country...

7/30/2019 d1-2 10.50 Technological Developments and Innovative Solutions. Gage Williams, West Country Renewables

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Making money from space Making money from spaceGage WilliamsGage Williams

West Country Renewables Ltd West Country Renewables Ltd 01208

841378

or

[email protected]

841378

or

[email protected]



What you can do with one acrey I’ll show you what can be done with one acre

yMy acre is windy as it is above 200m

y It is close to a business park and/or a large

dairy farm that uses about 400 MWh electricityand about 15,000 litres of heating oil

yThere is good access to 3 phase 11kV grid



What do farmers do? yThrough photosynthesis, they have harvested

crops that have got their energy from the sunyWhy do we eat food? Because it gives us energy

y

Farmers like to diversifyyCan do this with one acre used to convert wind,

solar and geo-thermal into electricity and heat for

their own and others’ use

yHere’s how



Using the wind

y Conventional: install a farm scale Endurance 55kW

turbine costing £280k and earning c. £60,000 in Yr 1

y Unconventional and available in 3 years: install a 130mwind-fence costing £30,000 and earning £15,000 in Yr 1



Using the suny One acre has space for 250kW solar PV, need eight rows of

solar panels, each row is 70m long, rows are 10m apart

y Cost £300k generates 250,000 kWh/yr at 11p FIT + 5p sale =£40k in Yr 1

y Wills Bros’ dairy farm has 4.5 acres of roof

y Unconventional in 3 years: could combine wind & solar:

y Fox-proof perimeter fence great for sheep or game pen



Digging for victory y One acre can take 70kW Ground Source Heat Pump

y Needs 700m of 1.2m deep trench to lay ‘slinkies’

y

Ten trenches 70m long 7m aparty Generates 150,000 kWh of heat – pump uses

40,000 kWh of solar or wind electricity

y 4.3p/kWh of Renewable Heat Incentiveearns £6,450

y Saves 16,000 litres of heating oil/gas = £11,350

y Uses 40,000 kWh electricity at 12p = - £4,800

(free if RE)y Net saving £13,000 for GSHP cost of £52,000



What has our acre earned?

About 600 MWh per acre, costs £632k, earns £103k/year

– remember these figures

System Cost Output

Electricity

Output

Heat

Year 1

Net Inc

ROI

E-3120 55kW

Turbine

£280,000 200 MWh - £50,000 17.8%

250kW

Solar PV

£300,000 250 MWh - £40,000 13.3%

70kW

GSHP

£52,000 - 150 MWh £13,000 25.0%

Totals £632,000 450 MWh 150 MWh £103,000 16.3%



Golden Acre ConclusionsyCornwall has 880,000 acres

yMany could be used to earn over £100k/yr

yMany could be community owned as a 16%return, RPI linked for 20 years, is unbeatable

ySupply companies such as Good Energy could offer discounts for pubs, shops, churches, village

halls in return for taking the renewable electricity

yRenewables prices are constant unlike fossil fuels

yCornwall could be a net exporter of energy



How many acres would we need? yCornwall uses 12,000 GWh/yr (1m tonnes of oil)

yThis would require 20,000 Golden Acres or

2.3% of Cornwall’s 880,000 acresyAt 70p/litre, we are spending £840m/yr on

energy or £3,600 per Cornish household

y20,000 Golden Acres would earn £2billion/yr

yAt £632k/acre, this would cost £12.6 billion

yTwo Hinkley nuclear plants will cost £14 billion,generate 16,000 GWh/yr, have high costs & not

deliver until after 2022



The Cornish AlpsyCornwall has one of the largest brownfield sites

in the UK – the Clay Area covers 12,000 acres

y Not all the Golden Acres will be in the ClayArea

yExisting wind & solar farms plus more singlefarm turbines & use of large roofs & car parks

y

6,000 acres of Cornish Alps used for solar PV,wind-fence/turbines & geothermal, would leave

less than 70 acres per parish (0.5% of land)



Clay Pits & Pumped StorageyCornish Alps has clay pits at different elevations

yClay pits are impermeable – no spillage to rivers

y Surplus wind & solar could be used to pump

water from lower to higher pits for storage

yWater run by pipe to lower pits using turbines toearn peak spot tariffs and ROCs or FITs

yShould balance the grid reducing the 20%over-supply that is wasted

yCornish Alps should become the SW’s battery



Conclusions

y 20,000 acres (2.3% of Cornwall) could make

Cornwall a net exporter of energy

yTurning a cost of £3,600 per home into a profityFarmers should look to their Golden Acres

yThe Cornish Alps should become a massive battery using pumped storage to balance the grid

y

Get’s over intermittency of solar and wind yCheaper than two new nuclear power stations at

Hinkley – especially full life cycle cost &

massive waste of heat

d1-2 10.50 technological developments and innovative solutions. gage williams, west country...

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