Renewable energies

We have always been convinced that completing the transition from fossil to renewable sources is a top priority and that Italy has unexploited potential in the form of natural resources sufficient to ensure that this process will be feasible and economically beneficial.
This is why we have honed our expertise in the renewable energy sector, and in the field of bioenergy in particular.

In order to achieve our goal, we have consistently used a number of technologies that allow us to create ad hoc products based on the available natural energy resources: we do not position ourselves as simple technology and service providers, but as integrated developers of specific projects.

In fact, we have internal managerial and engineering expertise that allows us to manage the following activities:

  • study of the local area and evaluation of the best available renewable sources;
  • feasibility studies;
  • management of authorisation processes;
  • planning and management of supply chains (bioenergy);
  • selection and purchasing of the top technology;
  • plant operation and management.

The Technologies Used

Direct combustion

Our typical plant is based on the established organic Rankine cycle technology, in which heat transfer oil is used as a fluid heat medium, for the combined production of electrical and thermal energy based on the combustion of solid biomass (wood chips and by-products of agriculture and agro-inudstry) in a boiler. A typical plant has an electrical power capacity of 0.999 MW and co-generates approximately 4 MW of thermal energy.

Gasification

We use plants that exploit biomass (wood chip) gasification technology in our micro co-generation projects. Such plants typically have capacities of 200 kWe and 400 kW of thermal energy.

The production process is divided into two major steps: the generation of syngas in the gasification reactor and the use of the syngas to generate electrical power through an industrial combustion engine and thermal power through a heat generator.

Anaerobic Digestion

Biomethane is a gas obtained through a process of upgrading biogas, which is in turn produced through the biological decomposition of organic substances through a process known as anaerobic digestion. One of the reasons why Renovo’s technology is particularly attractive is its ability to use multiple organic biomass matrices: by-products of agri-industry (crop waste, zoo waste, slaughterhouse scraps, whey and citrus industry waste), household organic waste, sewage sludge and landfill leachate may create new value in the form of biomethane.

focus_emissioni_eng

CO2 Emissions

One of the main questions regarding biomass-powered thermoelectric plants relates to emissions.
CO2 is the most harmful greenhouse gas in that it is the main cause of the greenhouse effect due to human activities. However, as defined in the UNFCCC (United Nations Framework Convention on Climate Change), biomass is a neutral source with respect to CO2 emissions since the CO2 released during combustion is equal to that absorbed during the life of the plant through photosynthesis. This is why Renovo’s biomass plants contribute to economic and energy development in pursuit of decarbonisation.

In addition, compared to a traditional domestic heating system, a biomass thermoelectric plant has different, lower emissions factors.

Emissioni_CO2_eng

First of all, an industrial plant functions in a controlled manner, optimised for maximum combustion efficiency, which results in reduced emissions for the same energy generated.

In addition, an industrial plant, as opposed to a domestic plant, presents systems for reducing emissions. These systems include, for example, bag filters, which have dust capture efficiencies of 98-99%.

PM10 Graphique

Emissioni_PM10_eng

CO2 Graphique

Emission_CO_eng

In addition, Renovo’s plants do not merely observe the emissions limits established by specific legislation, but are far more efficient and virtuous, since they comply with emissions limits far below the legally mandated levels.

PollutantLegal Limit
(mg/Nm3)
Renovo Guaranteed Emissions
(mg/Nm3)
Renovo plant performances comparing to legal limit
TOTAL DUSTES3010-66,6%
NITROGEN OXIDES (NOX)500200-60%
CARBON MONOXIDES (CO)300200-33,3%
SULPHUR DIOXIDE (SO2)200150-25%