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Gilegno

Manager: Gilegno di Grossoni Ernesto & Figli Snc • Location: Sommalombardo (Varese, Lombardy, Italy)
Plant: 1 x ZE-100-LT Low-Temperature Organic Rankine Cycle (ORC) Module, nominal output 100 kWe
Application: Power generation from biomass (wood and bark scraps from sawmill operation)


Mappa GilegnoThe Gilegno firm from Sommalobardo - a small town in the province of Varese, not far from Malpensa airport - is a sawmill which has decided to convert their processing residues into energy. The wooden residues are shredded into chips and then burned inside a movable-grate boiler which supplies overheated water to the ORC module which, in turn, transforms that thermal energy into electricity.

The ORC system supplied by Zuccato Energia is a ZE-100-LT module connected to the boiler via an overheated water loop, and hosted outdoors, under a large lean-to.

One of the peculiarities of this system is that residual heat from the condensation stage of the ORC is used to dessiccate the wood chips before conveying them to the boiler, thus increasing their heat value. Another peculiarity is that, given the firm location on the outskirts of a residential area, the skid has been enclosed in a custom sound-absorbing enclosure, to drop the already low noise emissions almost to zero. The electricity produced by the plant is output to the national grid, as usual.

The fuel used in this plant uses is sawmill waste, i.e. bark and wood bits shredded into small chips by specific machinery. As this material is derived from virgin, untreated wood which has undergone purely mechanical processing, it is considered for all practical and legal purposes as biomass and a renewable energy source

Below you will find a photo gallery related to this plant. Click on an image to enlarge it.

An aerial view of the plant; on the right, the shed hosting the plant.An aerial view of the plant; on the right, the shed hosting the plant. The ZE-100-LT ORC module skid being loaded for shippingThe ZE-100-LT ORC module skid being loaded for shipping The ZE-100-LT ORC module being installed in its noise-absorbing enclosure.The ZE-100-LT ORC module being installed in its noise-absorbing enclosure. General view from north side - L to R: woodchip storage (green), wastewood hopper (red), chipper (white), cooling tower (metal).General view from north side - L to R: woodchip storage (green), wastewood hopper (red), chipper (white), cooling tower (metal). General view from SE - L to R: ORC module enclosure (white), boiler (red), chip storage and storage-to-boiler conveyor (green)General view from SE - L to R: ORC module enclosure (white), boiler (red), chip storage and storage-to-boiler conveyor (green) The ZE-100-LT ORC module skid enclosure (L) and the movable-grate boiler (R)The ZE-100-LT ORC module skid enclosure (L) and the movable-grate boiler (R) A detail of the conveyor between the chipper and the woodchip storage binA detail of the conveyor between the chipper and the woodchip storage bin Detail of the storage-to-boiler conveyor, with the skid enclosure in the backgroundDetail of the storage-to-boiler conveyor, with the skid enclosure in the background The ZE-100-LT ORC module in its noise-absorbing enclosure and the back of the boilerThe ZE-100-LT ORC module in its noise-absorbing enclosure and the back of the boiler A detail of the fully insulated thermal connections to the boilerA detail of the fully insulated thermal connections to the boiler A detail of the boiler back and the ash dump gateA detail of the boiler back and the ash dump gate The cooling tower. A small one is sufficient, as residual heat is used to dry the wood chipsThe cooling tower. A small one is sufficient, as residual heat is used to dry the wood chips

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