Rybach, 2010
Theoretical = physically usable energy supply (heat in place).
Technical = % of theoretical potential that can be used with current technology.
Economic = time & location dependent % of technical potential that can be
economically used.
Sustainable = % of economic potential that can be used by applying sustainable
production levels (regulations, environmental restrictions).
Geological Confidence/“Modifying
Factors” CanGEA/AGEA 2010
Generic, principles-based system. Classifies a certain project in a numerical and language independent coding scheme.
https://www.unece.org/fileadmin/DAM/energy/se/pdfs/egrc/egrc7_apr2016/ECE.ENERGY.GE.3.2016.6_e.pdf
E-axis: ‘Economic and social viability’ (degree of favourability of social and economic conditions in establishing commercial viability of project, e.g. market prices, relevant legal, regulatory, environmental and contractual conditions)
F-axis: ‘Field project status and feasibility’ (maturity of studies and commitments necessary to implement project)
G-axis: ‘ Geological knowledge’ (level of confidence in the geological knowledge and potential recoverability of the quantities)
1) defining a project, link between a geothermal energy source (equivalent to the terms ‘deposit’ or ‘accumulation’ used for solid minerals and fossil fuels) and the product (heat, electricity)
2) estimating the quantities of energy that can be recovered and delivered as ‘products’ by the given project from the effective date of the evaluation forward (till the end of the project lifetime/limit)
3) classifying the quantified geothermal energy resource based on the criteria defined by the E, F and G (sub)categories
Estimation method / quantification (e.g. scenario, probabilistic) is NOT PART of the classification exercise! – no standard method uniformly accepted.
