Theoretical prediction of physical and chemical characteristics of the first drop'' of condensate from superheated geothermal steam: Implications for corrosion and scaling in turbines
- Univ. degli Studi di Udine (Italy). Dipartimento Scienze e Tecnologie Chimiche
- STEAM srl, Pisa (Italy)
- Geotermica Italiana srl, Pisa (Italy)
This paper describes a method for computing: (1) the chemical composition of the first drop of condensate which forms at dew-point temperature through expansion of superheated steam, and (2) the saturation index of the drop with respect to relevant solid phases, such as halite, amorphous silica, boric acid, borax and sal ammoniac. Boiling-point elevation is taken into account in these calculations. Preliminary application to some wells in the Larderello geothermal field indicate that: (1) the high concentration of HCl in the steam causes both the low pH and very high TDS of the first drop; (2) the lower the dew-point temperature, the higher the TDS of the first drop; (3) for a given chemical composition, the lower the steam pressure, the higher the risk of corrosion and scaling in the steam path.
- OSTI ID:
- 6964978
- Journal Information:
- Geothermics (International Journal of Geothermal Research and its Applications); (United Kingdom), Vol. 23:3; ISSN 0375-6505
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ITALY
VAPOR-DOMINATED SYSTEMS
NATURAL STEAM
CHEMICAL COMPOSITION
CORROSIVE EFFECTS
CONDENSATES
CORROSION
LARDERELLO GEOTHERMAL FIELD
PH VALUE
SCALING
CHEMICAL REACTIONS
DEVELOPED COUNTRIES
ENERGY SYSTEMS
EUROPE
FLUIDS
GEOTHERMAL FIELDS
GEOTHERMAL FLUIDS
GEOTHERMAL SYSTEMS
HYDROTHERMAL SYSTEMS
STEAM
WESTERN EUROPE
152001* - Geothermal Data & Theory- Properties of Aqueous Solutions
152004 - Geothermal Data & Theory- Isotope & Trace Element Studies