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Article type: Research Article
Authors: Battista, G.1 | Cataldi, C.2
Note: [1] Giampiero Battista holds a degree in Electrical Engineering of Rome University and has followed a one-year specialization course in nuclear engineering. At present, he is in charge of co-ordination of energy and economic matters at the Economic Sector of the Planning Department of ENEL (The National Electricity Board/Ente Nazionale per l'Energia Elettrica). His seven years of experience in planning were preceded by twelve years in the design and construction of nuclear power plants, including work in the United States (three years) and France (two years) on Fast Breeder Reactors.
Note: [2] Carlo Cataldi holds a degree in Mining Engineering of Rome University, and has worked with the Mining Institute of Rome University, the Italian Geological and Mining Survey before he joined ENEL. He first was employed as reservoir engineer in the Geothermal Center of ENEL, involved in well stimulation, treatment design and well testing. He then joined the Planning Department of ENEL, Economic Sector, and is in charge of monitoring Primary Energy Availability.
Abstract: Geothermal resources can be found on the earth in different forms and chemical/physical characteristics. From the viewpoint of immediate energetic utilization, they are usually classified in low- or high-temperature systems. At present only the high temperature systems are considered economically viable on an industrial scale for the production of electricity. In this framework high temperature geothermal production in Italy is monitored monthly, quarterly and annually, recording thermodynamic properties of geothermal fluid in different sections of steam pipeline from head of wells to power generating turbines (flow rate, pressure, temperature, salt content, etc.). In the Italian energy balance, the contribution of geothermal resources to electricity generation is evaluated on the basis of the real average heat content, expressed in calorific terms, of the geothermal fluid required to generate 1 kWh of electricity. In Italy two further alternative evaluation criteria have been introduced. The first (substitution criterion) is based on the quantity of primary fuel that would be consumed in conventional thermal power stations (primary equivalent of kWh) to produce the same quantity of electricity. The second (final energy criterion) evaluates the real energetic content delivered to final consumers. The two criteria are adopted by the major international institutions that publish energy statistics (OECD, IEA, EEC).
DOI: 10.3233/SJU-1984-2106
Journal: Statistical Journal of the United Nations Economic Commission for Europe, vol. 2, no. 1, pp. 63-71, 1984
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