vineyard pruning cycle_for_heat_production_in_east_veneto_italy

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Vineyard pruning cycle for heat production in east Veneto, Italy. A contracting example in a cooperation model Federico Correale Santacroce RURENER PROJECT MEETING Tirano, 11 marzo 2010

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Page 1: Vineyard pruning cycle_for_heat_production_in_east_veneto_italy

Vineyard pruning cycle for heat production in

east Veneto, Italy.

A contracting example in a cooperation model

Federico Correale Santacroce

RURENER PROJECT MEETING

Tirano, 11 marzo 2010

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L‘Azienda Regionale “Veneto Agricoltura“

Veneto Agricoltura is a Public Agency of Veneto Region directly involvedin research, demonstration, technical advice, evaluation of newtechnologies in agriculture, forestry, agri-food, aquaculture sectors.

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Veneto Agricoltura Bioenergy Action Plan

Since 2007 VA have a specific department dedicated to bioenergy, and a new

strategic Action Plan:

It is based on the following key assumptions:

� Prerequisite: The ratio of the fossil energy input and the renewable energy

output should be largely positive.

� “Money to farmers”: the biomass utilisation for energy should represent an

opportunity for income both for farms and forest entreprises.

� Advantages for environment: Bioenergy development constitues a

sustainable source of energy. Its utilisation can contributes to improve the

environment of involved lands.

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Bioenergy and agricultural products

� A wide variety of biomass potentially available

� Some agricultural chains are already well structured

� Farmer point of view: Cost and profit calculation, with an accurate evaluation of incomes alternatives

� We have to consider the reluctance to innovation of cultivation techniques, sometimes despite the interesting experimental results...

� THE FARMER in our vision: is not just a supplier of commodities, but need to play a leading role within a complete chain (direct contracting in energy trade)

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Vineyard prunings and woody residues (I)

Crop Cultivated area (ha) Residue (ton/ha) Total biomass obtainable (Mt)

Vineyard 871.597 2,9 2,53

Olive trees 1.170.362 1,7 2,00

Apple trees 64.447 2,4 0,15

Pear trees 45.826 2,0 0,09

Peach trees 67.458 2,9 0,20

Citrus trees 179.470 1,8 0,32

Almond trees 86.406 1,7 0,15

Hazel trees 69.561 2,8 0,19

TOTAL 2.555.127 - 5,63

Available biomass pruning residues in Italy

Fonte, ISTAT, mod. Cotana F., Cavalaglio G.

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Vineyard prunings and woody residues (II)� Italian local laws often forbid to burn

prunings directly on the field, a traditionalpractice, and plants disease growth up leaving residues on place.

� Energy generation (exp. Heat) solve technical and economical problems ofresidues disposal to landfill.

� Wood from vineyards pruning is good toproduce chips or pure/mixed pellet, and itis possible to burn it in modern boiler or stoves.

� Energy used in all the chain (582 kWh/t) isapproximately 12% of total energyobtained by biomass residues, while the remaining 88% (4268 kWh/t) representsthe renewable energy quote (Cotana F., Cavalaglio G., 2008)

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Vineyard prunings and woody residues: a study case

� Società Cooperativa Agricola Livenza - COAL – Motta di Livenza(TREVISO)

� 1976: 14 farms

� 2009: 150 farms, total 1.000 ha of vineyards (2.500 ha with othercrops

� Production of prunings in this area is 0,9-3,2 t /ha; potentiality ofCOAL is about 5.000 ha

� In the past, prunings residues were traditionally manually harvestedfrom ground, and burn for bread cooking. Now is frequently chippedor burned on place, when allowed.

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How does it work:

HarvestingPruning

Direct chipping

Round bale Bale Stocking Bale chipping

Chips Stocking

Moisture 30-35% Moisture 10-12% Stove

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Fact Sheet I:

� Harvesting 100 ha :

� Round bale machine (customize from commercial grass bale m.)

� Bale diam. 1,5 – 2 m

� N. Bale harvested /ha: 47 in 76h

� Average weight: 0,57 t

� TOTAL PRODUCTION: 1,71 t/ha (moist. 50%)

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Fact Sheet II:

� Processing (chipping; av. Moisture of bale: 11%):

� Chipper JENZ HEM 561 335 kw truck mounted

� N. Bale chipped: 44/h

� Chipper Performance: 14,8 t/h

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Fact Sheet III:

� Average Costs (€/t):

52,89Total

19,16Chipping

12,66trasport/stocking

21,07Harvesting and baling

Actual costs to harvest and take out of field pruning residues to landfill is

About 50 €/t …….but is only a COST, without any correlated income.

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Two different “scenarios„:

� Contracting

� Selling heat and/or electricity to community, other farm, private buildings, installing little stoves (60kwt up to 1 Mwt) or . Cooperative sell heat within a contract benchmarked to fossil fuel price.

� Seller is responsible of all chain, from suplying of biomass tomanage plants.

� COAL manages about 50 little plants

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Two different “scenarios„:

� Medium scale cogeneration

� It’s an interesting solutions as in Italy there is now high national grant forelectric power production from renewables.

� Actually

� COAL manage 1 plant of 1 MWe

� Only 500 Kw are sustainable in COAL area (about 5.000 Ha involved in prunings “production”) other biomass needed is coming from forest wood and other cultural residues

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Mixed pellet from vineyards: a good perspective

� Currently it has no specific market in the

Veneto region

� It requires processes of standardization

and commercial certification of products

(the final consumer is increasingly

demanding about technical and

environmental quality of product)

� It could benefit from the diffusion of

innovative boilers and dedicated stoves

(the improvement of combustion)

� But….High cost: about 83,09 €/t on (VA

experience on another similar study

case).

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Conclusions

� Vineyard prunigs: from problem to energy resource

� High convenience at small-medium scale.

� Contracting: best solution dimensioning the chain to biomasslocally available.

� Medium scale cogeneration: highly attractive with actual nationalincentives (electric power from renewables).

� Importance of some technical details and of correct evaluation ofplants dimensioning step (stoves or cogenerator plant)

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Thanks for your attention

A.I.E.L. - [email protected]

Dott. Eliseo Antonini

Dott.ssa Annalisa Paniz

COAL Motta di Livenza

www.coopcoal.com

Veneto Agricoltura

Dott. Federico Correale Santacroce

Dott. Loris Agostinetto

� Sportello di orientamento per le bioenergie

[email protected]

� Web: http://www.venetoagricoltura.org

� E-Mail: [email protected]

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