Abstract
Renewable forms of energy are increasingly penetrating the electricity market, particularly, geothermal energy. A wide range of resource temperatures and fluid quality are converted mostly using traditional binary power plants and, recently, using Climeon modular units. Portuguese natural geothermal resources are far from precise estimations. Despite the parameter uncertainties, electric power resource estimations of two natural geothermal reservoirs are presented: a volcanic sourced heated high-enthalpy geothermal reservoir in Sete Cidades, São Miguel Island, Azores; and a low-enthalpy geothermal reservoir linked to a fractured zone in a granitic setting in Longroiva, in the northern part of the Portuguese mainland. Based on the volumetric method, we assessed the power potential of geothermal resources in Sete Cidades and Longroiva using a probabilistic methodology—Monte Carlo simulation. The average reserve estimations for Climeon module were 5.66 MWe and 0.64 MWe for Sete Cidades and Longroiva, respectively. This figure was by far higher when compared to traditional binary technology; those differences were mostly attributed to distinct conversions efficiency factors.
Highlights
Global warming is compelling Earth’s civilizations to move to renewable forms of energy
Remote zones without access to energy grid systems can be supplied by local renewable energy, such as geothermal energy [1]
We present an evaluation of the geothermal power potential in two sites in Portugal (Figure 1), with different geological and geodynamic settings, based on a volume estimation methodology using a Monte Carlo approach
Summary
Global warming is compelling Earth’s civilizations to move to renewable forms of energy. Remote zones without access to energy grid systems can be supplied by local renewable energy, such as geothermal energy [1]. Among the renewable energy portfolio, geothermal energy holds a significant resource potential at Earth surface, available to harnesses in housing and industry by converting into electricity or by direct use. Geothermal energy uses heat from the Earth to deliver power. It is a clean, renewable, and stable resource used all over the world directly or by transforming thermal energy into electricity [1,2,3,4]
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