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References LT-Series Products

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Ecowood

Manager: Ecowood Srl • Location: Rovato (Brescia, Lombardy, Italy)
Plant: 1 x ZE-150-LT Low-Temperature Organic Rankine Cycle (ORC) Module, nominal output 150 kWe (derated to 135 kWe)
Application: Power generation in combination with a boiler burning biomass (end-of-life shipping pallets)


Mappa EcowoodEcowood Srl is a firm from Rovato - a town in Lombardy about 20 km west from Brescia - which deals in wooden shipping pallets and is also fully authorized for transport, stockage and disposal of wooden waste. The waste biomass it acquires in its line of work (mainly wooden pallets no longer usable for shipping) is burned into a 1-MWe movable-grate boiler by Herz which feeds heat to a ZE-150-LT ORC module by Zuccato Energia.

The versatility of the Zuccato Energia ORC modules in handling partial loads has come to fruition in this plant, where the generator has been derated to 135 kWe from the nominal 150 to meed the client needs. An economizer placed on the flue line also recovers part of the heat to dry and preheat the wooden biomass.

The system, as every Zuccato Energia ORC module produced, is mounted on a self-supporting frame ("skid") that includes exchangers,turbogenerator, and control panel. The Skid, in indoor configuration, is housed in a purpose-built building that also hosts the boiler and the biomass hopper, while excess heat is dissipated by an external evaporative cooling tower. The system is entirely remote operated and does not require the presence of an operator

It is also interesting to note the financing formula that has been used to build the plant. With the collaboration of Zuccato Energia, Ecowood has been put in contact with an E.S.Co. that financed the whole plant in exchange for its ownership and earnings for the first years of the plant's life, during which Ecowood will supply the biomass at zero cost. When the payback period's over, the plant will be given back to Ecowood, which will have then acquired it practically for free.

Wooden biomass is an environmentally compatible and renewable fuel, with zero CO2 impact, as the CO2 released when burning is the same CO2 the plants captured during their growth

Below you will find a photogallery regarding this plant. Click on an image to enlarge it.

A general view of the building housing the plantA general view of the building housing the plant The shredder which reduces the unusable pallets into wooden chipsThe shredder which reduces the unusable pallets into wooden chips An overview: the aperture in the foreground houses the biomass hopperAn overview: the aperture in the foreground houses the biomass hopper The biomass hopper, with a rake-style feeding systemThe biomass hopper, with a rake-style feeding system The boiler seen from the right sideThe boiler seen from the right side The boiler seen from the left sideThe boiler seen from the left side The ash filter (black) and the economizer (green)The ash filter (black) and the economizer (green) The ZE-150-LT ORC module in place, seen from the control panel sideThe ZE-150-LT ORC module in place, seen from the control panel side The turbogenerator (silver cylinder) inside the skid frameThe turbogenerator (silver cylinder) inside the skid frame he skid seen from the thermal connections sidehe skid seen from the thermal connections side The water treatment system for the cooling towerThe water treatment system for the cooling tower L to R: the bag filter for flue gases, the chimney and the cooling towerL to R: the bag filter for flue gases, the chimney and the cooling tower

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