Evaluation of renewable energy potential in Pilot …...Evaluation of renewable energy potential in...
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3. Examples of r.green.hydro and r.green.biomassfor modules
The modules r.green.hydro and r.green.biomassfor will be soon available for everybody on GRASS or QGIS. They are composed of different programs (theoretical, legal, technical, economic and
recommended) which can detect the potential of hydro power and forest biomass according to different criteria.
Evaluation of renewable energy potential in Pilot Areas:a Decision Support System
Giulia Garegnani, Pietro Zambelli, Francesco Geri, Julie Gros, Valentina D’Alonzo, Gianluca Grilli, Sandro Sacchelli, Jessica Balest, Giorgio Curetti, Alessandro Paletto, Marco Ciolli, Daniele Vettorato
r.green.hydro computes the potential of hydro power returning maps with
potential plants and power
r.green.hydro.theoretical
r.green.hydro.legal r.green.hydro.recommended
Output maps :
- Intakes and restitution of potential
plants
- Segments of potential plants
Here is the output of r.green.hydro.recommended
excluding from the computation of potential plants
the areas visible from the mountain huts. The
visibility become higher if the area is visible from
several mountain huts.
r.green.hydro.technical
1. Description of r.green model
The Alpine Space project "recharge.green-Balancing Alpine Energy and Nature" focuses
on the trade-off between energy production and its impacts on nature. In this project, we
developed a decision support system (DSS) with a multi-disciplinary approach and tries to
consider a substantial number of variables from technical, legal, ecological and economic
perspective, in order to evaluate the residual potential of renewable energy. The DSS is
called r.green and is organized in modules for each kind of renewable energy. Starting
from the availability of the resources and goes through different levels of energy potential
(theoretical, legal, technical, economic and recommended) different scenarios can be
compared. Thus, we can identify the energy potential that can be concretely exploited and
the more suitable places for constructing a new power plant.
2. Software GIS open source
r.green model is run in GRASS GIS software (or QGIS).
The Geographic Resources Analysis Support System (GRASS) supports the
creation, modification and processing of 2D and 3D raster and vector layers.
QGIS is a user friendly Open Source Geographic Information System (GIS) and
an official project of the Open Source Geospatial Foundation (OSGeo). It
provides a continuously growing number of capabilities provided by core
functions and plugins (visualize, manage, edit, analyse data, and compose
printable maps).
These software are open source, it means that the source code made available
with a license in which the copyright holder provides the rights to study,
change, and distribute the software to anyone and for any purpose.
Input maps :
- Discharge
- Elevation
Input maps :
- Discharge
- Elevation
- Minimum flow
- Existing plants
Optional input :
- Distance and length of potential plants
(number)
- Maximum power of areas (map)
- Areas to exclude (map, ie parks)
Output map :
Streams with values of potential
power which can be exploited
r.green.hydro.economic
Output maps :
- Intakes and restitution of potential plants including cost estimation
- Structure of the potential plants - derivation channel and penstock - including cost estimation
Cost estimation is a sum of the different costs which enables to calculate the net present value :
Total cost = compensation + excavation + supply and installation
of pipelines and electro lines + grid connection + some others
Net present value = depreciation rate * (Revenue – Maintenance ) – Total cost
Input :
- The same as r.green.hydro.legal
- Map with areas to exclude according to
user’s recommendations
r.green.biomassfor calculates the potential of energy production from forest
biomass
Input maps :
- Forest increment
- Stand surface
- Forest management
- Forest treatment
r.green.biomassfor.theoretical
Input maps :
- Forest yield
- Stand surface
- Forest management
- Forest treatment
r.green.biomassfor.legal
Inputs maps :
- Forest yield
- Stand surface
- Forest management
- Forest treatment
- Digital Terrain Model
- Parcel map
- Forest roads
r.green.biomassfor.technical
r.green.biomassfor.economic
Inputs maps :
- Forest yield
- Stand surface
- Forest management
- Forest treatment
- Forest roads
- Main roads
- Digital Terrain Model
- Parcel map
- Prices and costs
Output map :
Theoretical energy production :
maximum potential
Optional input :
Legal energy production according to
forestry plans
Output:
Technical energy production
considering roads accessibility and slope
Output:
Economic energy production considering
wood prices and other costs
Output maps :
- Intakes and restitution of potential plants
including head losses and efficiency ->
the value of power is corrected
- Structure of the potential plants -
derivation channels and penstocks -
for both sides of the river, also including
the corrected power