hedgerows for woodfuel: orc machinery trials 2014/2015
TRANSCRIPT
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Experiences from the ORC’s Machinery Trials
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Machinery Trials
Elm Farm December 2014&
Wakelyns February 2015
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Hedge at Elm Farm
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Tree Shears as cut Tree Shears and chainsaw finish
Manual FellAssisted Fell
50m50m50m 20m
Coppicing Methods
Elm Farm
Road
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Hedge at Wakelyns
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Manual Fell Circular Saw 1Felling Grapple
20m40m 20m
Coppicing Methods
Wakelyns Circular Saw 2
20m
Green Lane
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Manual Fell
2 man team and chainsaw
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Assisted Fell
2 man team, chainsaw, and 8t excavator
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Video of assisted fellers at work
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Tree Shears
1 man team, 10” Dymax tree shears mounted on 9t
excavator
Three finishes:
• Tree shears as cut• Chainsaw finish (short)• Chainsaw finish (long)
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Video of tree shears at work
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Circular Saw
2 man team, tractor mounted circular saw, tractor with fork
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Video of circular saw at work
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Felling Grapple
1 man team with Gierkink felling grapple mounted on 5.5t
excavator
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Video of felling grapple at work
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Chipping Methods
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Large Scale
Tractor towed Heizohack HM 8-500 K fuel grade chipper with
crane
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Video of large chipper
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Small Scale6” Timberwolf
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Video of small chipper
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Wakelyns ProcessingWoodchip vs Logs
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The Results
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Manual Fell 1 EF Manual Fell 2 EF Manual fell WAF Assisted Fell Tree Shears As Cut Tree Sheers + Chainsaw
Circular saw 1 Circular saw 2 Felling grapple
9.05
6.13
12.65
1.542.78 3.30
5.40
2.90 2.62
Mean Minutes per Metre of Hedge Cut
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Cost per Metre of Hedge Cut
Manual Fell 1 EF Manual Fell 2 EF Manual Fell WAF Assisted Fell Tree shears Trees shears + chainsaw
Circular Saw 2 Circular Saw 1 Felling Grapple
£7.72
£4.38
£7.83
£2.45
£3.31
£3.93
£2.42
£4.50
£3.14
£8.24
£4.67
£3.01
£5.96
£7.08
£2.80
£5.22
£6.28
£/m (exc. haulage)
£/m (inc. haulage)
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1.48
5.01
Mean Minutes per Metre of Hedge Material Chipped
Large Scale Chipper Small Scale Chipper
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£4.79
£9.78
Large Scale Chipper Small Scale Chipper
Cost (£) per Metre of Hedge Material Chipped
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Woodchip Production at Elm Farm
Actual fresh volume/mass at 47% MC
Average of
0.26 /0.08 tonnes/84.12kg
per metre of hedge
42.5 /14.3 tonnes/14300 kg
harvested from 170m of hedge
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Woodchip Value
*HWFC Hampshire Woodfuel Co-operative, based on Feb 2015 rates
Estimated open market value
Private sale to HWFC member
Sell to HWFC, as a member
Sell to a self supplier
£1.50
£3.84 £4.09
£14.39
Net profit £/m3
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??
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Let’s take the best case scenario …
£14.39 per + large scale chipper + minimum of 300m of hedge
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Savings made on reduced hedgerow flailing
With a flailing cost of £1 per metreand assuming we side flail only every 3 years
A potential saving of
£13 per metre over a 20 year hedgerow coppice rotation
* £1 per meter is based on contracting bills and information from flailing contractors for a large west country hedge 3-4m wide (Dickenson, R. 2014).
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Countryside Stewardship grantHedgerow coppicing (BN6)
£4 per metre
On hedges over 20m long, less than 5m wide and composed of at least 80% native shrubs
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Method Net Cost/ Profit (£/m)
Net Cost/ Profit (£/m) Inc. flailing
savings
Net Cost/ Profit (£/m) Inc. flailing savings +
coppicing grant
Manual Fell 1 (EF) -9.43 +3.57 +7.57
Manual Fell 2 (EF) -5.86 +7.14 +11.14
Manual Fell (WAF) -9.02 +3.98 +7.98
Assisted Fell -4.20 +8.80 +12.80
Tree Shears -7.15 +5.85 +9.85
Tree Shears + Chainsaw -8.27 +4.73 +8.73
Circular Saw 2 -4.00 +9.00 +13.00
Circular Saw 1 -6.41 +6.59 +10.59
Felling Grapple -7.48 +5.52 +9.52
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Pence per Kwh
Manual Fell 1 (EF)
Manual Fell 2 (EF)
Manual Fell (WAF)
Assisted Fell Tree Shears Tree Shears + Chainsaw
Circular Saw 1
Circular Saw 2
Felling Grapple
4.23
3.40
4.14
3.01
3.70
3.96
2.96
3.53
3.78
3.06
2.22
2.97
1.83
2.53
2.79
1.78
2.35
2.60
Small Scale Chipper
Large Scale Chipper
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Fuel + Method Pence per Kwh Comments
Hedgerow woodchip self supplied (large scale chipper)
1.6 – 3.1 Depends on which harvesting method ( does not include transport cost as self supplying)
Hedgerow woodchip supplied (small scale chipper)
2.8 – 4.2 Depends on which harvesting method ( does not include transport cost as self supplying)
Bought in wood chips (30% MC) 3.1* Mean UK price for bulk order of 10 tonnes
Bought in logs (30% MC) 3.5* Based on bulk delivery of 1 tonne
Wood pellets 4.4* Mean UK price based on bulk order of 5 tonnes
Natural gas 4.9*
Heating oil 5.8*
LPG (bulk) 6.5*
Electricity 15*
* Figures taken from DHG publication ‘Wood Fuel From Hedges’ 2014
Comparative Energy Costs to a Customer
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Where next?
RHI payments?
Farmers making use of existing resources and
machinery?
A supplementary enterprise?
Other grants and funding?
Demonstration/best practice sites ?