Thermodynamic energy and exergy analysis of a PEM water electrolyzer driven by geothermal power for hydrogen production is performed. For this purpose, work is produced from a geothermal resource by means of the organic Rankine cycle; the resulting work is used as a work input for an electrolysis process; and electrolysis water is preheated by the waste geothermal water. The first and second-law based performance parameters are identified for the considered system and the system performance is evaluated. The effects of geothermal water and electrolysis temperatures on the amount of hydrogen production are studied and these parameters are found to be proportional to each other. We consider a geothermal resource at 160 degrees C available at a rate of 100 kg/s. Under realistic operating conditions, 3810 kW power can be produced in a binary geothermal power plant. The produced power is used for the electrolysis process. The electrolysis water can be preheated to 80 degrees C by the geothermal water leaving the power plant and hydrogen can be produced at a rate of 0.0340 kg/s. The energy and exergy efficiencies of the binary geothermal power plant are 11.4% and 45.1%, respectively. The corresponding efficiencies for the electrolysis system are 64.0% and 61.6%, respectively, and those for the overall system are 6.7% and 23.8%, respectively. (C) 2014 Elsevier Ltd. All rights reserved.
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Univ Castilla La Mancha, Fac Ciencias Quim, Dept Ingn Quim, Ciudad Real 13005, SpainUniv Castilla La Mancha, Fac Ciencias Quim, Dept Ingn Quim, Ciudad Real 13005, Spain
Caravaca, A.
;
Sapountzi, F. M.
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Univ Castilla La Mancha, Fac Ciencias Quim, Dept Ingn Quim, Ciudad Real 13005, SpainUniv Castilla La Mancha, Fac Ciencias Quim, Dept Ingn Quim, Ciudad Real 13005, Spain
Sapountzi, F. M.
;
de Lucas-Consuegra, A.
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Univ Castilla La Mancha, Fac Ciencias Quim, Dept Ingn Quim, Ciudad Real 13005, SpainUniv Castilla La Mancha, Fac Ciencias Quim, Dept Ingn Quim, Ciudad Real 13005, Spain
de Lucas-Consuegra, A.
;
Molina-Mora, C.
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Univ Castilla La Mancha, Fac Ciencias Quim, Dept Ingn Quim, Ciudad Real 13005, SpainUniv Castilla La Mancha, Fac Ciencias Quim, Dept Ingn Quim, Ciudad Real 13005, Spain
Molina-Mora, C.
;
Dorado, F.
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Univ Castilla La Mancha, Fac Ciencias Quim, Dept Ingn Quim, Ciudad Real 13005, SpainUniv Castilla La Mancha, Fac Ciencias Quim, Dept Ingn Quim, Ciudad Real 13005, Spain
Dorado, F.
;
Valverde, J. L.
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Univ Castilla La Mancha, Fac Ciencias Quim, Dept Ingn Quim, Ciudad Real 13005, SpainUniv Castilla La Mancha, Fac Ciencias Quim, Dept Ingn Quim, Ciudad Real 13005, Spain
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Univ Castilla La Mancha, Fac Ciencias Quim, Dept Ingn Quim, Ciudad Real 13005, SpainUniv Castilla La Mancha, Fac Ciencias Quim, Dept Ingn Quim, Ciudad Real 13005, Spain
Caravaca, A.
;
Sapountzi, F. M.
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Univ Castilla La Mancha, Fac Ciencias Quim, Dept Ingn Quim, Ciudad Real 13005, SpainUniv Castilla La Mancha, Fac Ciencias Quim, Dept Ingn Quim, Ciudad Real 13005, Spain
Sapountzi, F. M.
;
de Lucas-Consuegra, A.
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h-index: 0
机构:
Univ Castilla La Mancha, Fac Ciencias Quim, Dept Ingn Quim, Ciudad Real 13005, SpainUniv Castilla La Mancha, Fac Ciencias Quim, Dept Ingn Quim, Ciudad Real 13005, Spain
de Lucas-Consuegra, A.
;
Molina-Mora, C.
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h-index: 0
机构:
Univ Castilla La Mancha, Fac Ciencias Quim, Dept Ingn Quim, Ciudad Real 13005, SpainUniv Castilla La Mancha, Fac Ciencias Quim, Dept Ingn Quim, Ciudad Real 13005, Spain
Molina-Mora, C.
;
Dorado, F.
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Univ Castilla La Mancha, Fac Ciencias Quim, Dept Ingn Quim, Ciudad Real 13005, SpainUniv Castilla La Mancha, Fac Ciencias Quim, Dept Ingn Quim, Ciudad Real 13005, Spain
Dorado, F.
;
Valverde, J. L.
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Univ Castilla La Mancha, Fac Ciencias Quim, Dept Ingn Quim, Ciudad Real 13005, SpainUniv Castilla La Mancha, Fac Ciencias Quim, Dept Ingn Quim, Ciudad Real 13005, Spain