Vineyard pruning cycle_for_heat_production_in_east_veneto_italy


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Vineyard pruning cycle_for_heat_production_in_east_veneto_italy

  1. 1. RURENER PROJECT MEETING Tirano, 11 marzo 2010 Vineyard pruning cycle for heat production in east Veneto, Italy. A contracting example in a cooperation model Federico Correale Santacroce
  2. 2. L‘Azienda Regionale “Veneto Agricoltura“ Veneto Agricoltura is a Public Agency of Veneto Region directly involved in research, demonstration, technical advice, evaluation of new technologies in agriculture, forestry, agri-food, aquaculture sectors. Page 2
  3. 3. 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. Page 3
  4. 4. 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) Page 4
  5. 5. Vineyard prunings and woody residues (I) Available biomass pruning residues in Italy 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 Fonte, ISTAT, mod. Cotana F., Cavalaglio G. Page 5
  6. 6. Vineyard prunings and woody residues (II) Italian local laws often forbid to burn prunings directly on the field, a traditional practice, and plants disease growth up leaving residues on place. Energy generation (exp. Heat) solve technical and economical problems of residues disposal to landfill. Wood from vineyards pruning is good to produce chips or pure/mixed pellet, and it is possible to burn it in modern boiler or stoves. Energy used in all the chain (582 kWh/t) is approximately 12% of total energy obtained by biomass residues, while the remaining 88% (4268 kWh/t) represents the renewable energy quote (Cotana F., Cavalaglio G., 2008) Page 6
  7. 7. 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 other crops Production of prunings in this area is 0,9-3,2 t /ha; potentiality of COAL is about 5.000 ha In the past, prunings residues were traditionally manually harvested from ground, and burn for bread cooking. Now is frequently chipped or burned on place, when allowed. Page 7
  8. 8. How does it work: Round bale Bale Stocking Bale chipping Pruning Harvesting Moisture 30-35% Moisture 10-12% Stove Direct chipping Chips Stocking Page 8
  9. 9. 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%) Page 9
  10. 10. 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 Page 10
  11. 11. Fact Sheet III: Average Costs (€/t): Harvesting and baling 21,07 trasport/stocking 12,66 Chipping 19,16 Total 52,89 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. Page 11
  12. 12. 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 to manage plants. COAL manages about 50 little plants Page 12
  13. 13. Two different “scenarios„: Medium scale cogeneration It’s an interesting solutions as in Italy there is now high national grant for electric 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 Page 13
  14. 14. 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). Page 14
  15. 15. Conclusions Vineyard prunigs: from problem to energy resource High convenience at small-medium scale. Contracting: best solution dimensioning the chain to biomass locally available. Medium scale cogeneration: highly attractive with actual national incentives (electric power from renewables). Importance of some technical details and of correct evaluation of plants dimensioning step (stoves or cogenerator plant) Page 15
  16. 16. Partners A.I.E.L. - Dott. Eliseo Antonini Dott.ssa Annalisa Paniz COAL Motta di Livenza Veneto Agricoltura Dott. Federico Correale Santacroce Thanks for your attention Dott. Loris Agostinetto Sportello di orientamento per le bioenergie Web: E-Mail: Page 16