Remote areas such as islands and rural regions often face major challenges to get access to electricity, most rely on diesel generators or heavy fuel engines that implicate the use of fossil fuels causing higher economical costs for governments and growing environmental impact. Geothermal resources on volcanic islands and remote areas can represent today a viable solution to create an efficient and sustainable energy model producing electricity for local needs by means of a renewable source available 24/7. Exergy presents the 4 MW Pico Alto geothermal power plant located on Terceira Island, meeting up to more than 10% of the local energy needs and approximately 25% of the local baseload.

1. HARNESSING GEOTHERMAL
POWER IN ISLANDS AND
REMOTE AREAS: THE PICO
ALTO GEOTHERMAL
PROJECT
1
Stefano Consolandi
EMEA Sales Director

2. 2
SUMMARY
› Geothermal Energy on islands – potential
› The Pico Alto Geothermal Power Plant
› References Video

3. GEOTHERMAL ENERGY ON ISLANDS
3
CANARY ISLAND
CAPE VERDE ISLAND
Geothermal energy
providing baseload
power, meeting the
minimum level of
power demand all
day
Geothermal energy
could generate
30% of clean
energy in the
Canary Islands
Geothermal
potential up to
3500MWe
GUADALUPE ISLAND
With a power production from
geothermal that presently
meeting over 22% of the total
demand of the archipelago, the
Azores have shown that
geothermal energy can provide a
local, stable, and clean energy
source that can help EU islands
achieve the energy transition
SCENARIOS
AZORES ISLANDS
Unlocking the potential of geothermal energy in islands
– EGEC 2017
QUARZ Africa – Nov 2017
ThinkGeoEnergy – Feb 2018
EGEC– Sett 2017

4. 4
AZORES - Terceira

5. PICO ALTO POWER
PLANT
5

6. PICO ALTO POWER PLANT
6
• Client Name: Eda Renovaveis
• Plant Name: Pico Alto
• Plant Location: Terceira Island, Azores,
Portugal
• Plant size: 4 MW
• Application: Geothermal
• Model used: GEX 400
• Type of Fluid : Steam + Brine
• Condensing system: Air cooled condensers
• Generator voltage: 11kV
• Installation: Outdoor
• Footprint: 40 m x 38 m
A TURN-KEY PROJECT BY
EXERGY AND COSAPI - MAS ERRAZURIZ

7. PICO ALTO POWER PLANT
7
ORC input Heat source Cooling
Brine
Temp
(°C)
Brine
Pressure
(bar a)
Steam
Temp
(°C)
Steam
Pressure
(bar a)
Steam+NCG
Flow
(ton/hr)
Brine
flow
(ton/hr)
Total
flow
(ton/hr)
Method
Design
Temp
(°C)
175.1 10 161.4 5.6 34.4 51.5 85.9 Air 23
N° of Turbines 1
Pressure levels 1
Working fluid nC5
MAIN PLANT PARAMETERS

8. 8
PICO ALTO POWER PLANT
PLANT LAYOUT
Turbine
GeneratorEvaporators +
preheaters
Recuperator
Air Cooled
Condenser
Feed
Pumps

9. 9
PICO ALTO POWER PLANT
Running on average at 110% of
nominal load

10. 10
AZORES - CONSUMPTION/PRODUCTION
*PROCURA E OFERTA DE ENERGIA ELETRICA – DEZEMBRO 2017 – EDA RENOVAVEIS
Total consumption ~730GWh
Geothermal
accounts for
more than 10%
of the island’s
electricity
needs

11. EXERGY ACHIEVEMENT
11
In only 6 YEARS we have achieved..

12. H E A D O F F I C E
Via degli Agresti, 6
40123 Bologna (BO) ITALY
Via Santa Rita, 14
21057 Olgiate Olona (VA) ITALY
Tel +39 0331 18 17 711
Fax +39 0331 18 17 731
O P E R A T I N G H E A D Q U A R T E R S
E X E R G Y - O R C . C O M
I N F O @ E X E R G Y . I T
12
operating
hq