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San Donnino Logo

Borgo San Donnino Holiday Farm

Manager: Tecnologie Ambientali srl • Location: Città della Pieve (Perugia, Umbria, Italy)
Plant: 2 x ZE-100-LT Low-Temperature Organic Rankine Cycle (ORC) Module, nominal output 100 kWe each
Application: Power generation in combination with a boiler burning biomass (pruning residues)


Mappa Borgo San DonninoBorgo San Donnino is a large holiday farm located in Città della Pieve, in the Umbria countryside near the border with Tuscany, that includes several restructured historical buildings, as well as a 60-hectares park including woods and fields. They decided to monetize the waste biomass their park produces (i.e.pruning residues) by using its combustion to generate electricity taking advantage of the existing state incentives.

Pruning residues are collected and used to fuel a movable-grate Herz-Binder boiler that feeds the 1.6MW of heat it generates to two ZE-100-LT ORC modules produced by Zuccato Energia. Said ORC modules are hosted, together with the boiler, inside a purpose-built building, each on its own skid with its turbogenerator, exchangers and control panel, but operating in parallel with each other. Produced power (200 kW) is output to the national grid via a nearby grid connection cabin.

The ORC plant was built with the project financing formula by Tecnologie Ambientali Srl which will initially remain the owner of the plant while the farm sells them the biomass fuel at a price set in advance for several years according to an agreement. As all biomass, pruning residues are a environmentally friendly, renewable and incentivated energy source that's CO2-neutral as CO2 released when burning is the same captured during plant growth.

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

The power station entrance gateThe power station entrance gate The power station building. Large door opens on bolier room, small one on ORC roomThe power station building. Large door opens on bolier room, small one on ORC room The ZE-100-LT ORC modules seen thru the ORC room door.The ZE-100-LT ORC modules seen thru the ORC room door. The front of the power station building with the biomass storage area in foregroundThe front of the power station building with the biomass storage area in foreground The rear of the power station with (L to R) biomass storage, fuel hopper and control room door.The rear of the power station with (L to R) biomass storage, fuel hopper and control room door. The fuel loading hopper, with feeding rakes on the bottom.The fuel loading hopper, with feeding rakes on the bottom. The open door of the circuit breakers room.The open door of the circuit breakers room. The circuit breakers room from the inside.Door leads to the boiler room.The circuit breakers room from the inside.Door leads to the boiler room. The boiler (right) and the ash filter (left).The boiler (right) and the ash filter (left). A peek inside the operating boilerA peek inside the operating boiler One of the two ZE-100-LT modules in its place.One of the two ZE-100-LT modules in its place. One of the 100-kWE direct-drive turbogeneratorsOne of the 100-kWE direct-drive turbogenerators Flue gas treatment system and chimney. On the right, the dry cooler.Flue gas treatment system and chimney. On the right, the dry cooler. A detail of the dry cooler control panels.A detail of the dry cooler control panels. The nearby electrical cabin.The nearby electrical cabin.
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