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Binary dual‐flashing geothermal power plants
Author(s) -
Shi Hua,
Michaelides Efstathios E.
Publication year - 1989
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.4440130202
Subject(s) - flashing , evaporator , degree rankine , isobutane , geothermal power , flash evaporation , binary number , geothermal gradient , process engineering , power station , environmental science , nuclear engineering , thermodynamics , chemistry , petroleum engineering , engineering , mathematics , heat exchanger , geothermal energy , physics , organic chemistry , arithmetic , geophysics , catalysis
A new type of geothermal power plant is proposed and analysed, which combines the advantages of the binary and the dual‐flashing units. This combination avoids some of the shortcomings of conventional binary plants. At their optimum conditions these binary dual‐flashing plants may produce up to 40% more work than a conventional binary optimized unit. Any fluid with suitable thermodynamic properties may be used as secondary fluid. For this study ammonia, freon‐12 and isobutane have been used in the secondary Rankine cycle. Two parameters are optimized in the binary dual‐flashing plant, namely the temperature of evaporation and the dryness fraction in the evaporator. The optimization procedure and the governing equations for the operation of the new plants are described in the paper.