An intermediate heat exchanging-depressurizing loop for nuclear hydrogen production

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Sulfur-iodine (SI) cycle should overcome many engineering challenges to commercialize and prove its feasibilities to compete other thermo-chemical cycles. Some critical issues such as structural material, harsh operating condition and high capital costs were considered obstacles to be actualized. Operating SI cycle at low-pressure is one of the solutions to actualize the cycle. The flash operation with over-azeotropic HI at low pressure does not require temperature and pressure as high as those in the existing methods as well as heating for separation. The operation in low pressure reduces corrosion problems and enables us to use flexible selection of structural material. We devised an intermediate heat exchanging-depressurizing loop to eliminate high operating pressure in the hydrogen side as well as a large pressure difference between the reactor side and the hydrogen side. Molten salts are adequate candidates as working fluids under the high-temperature condition with homogeneous phase during pressure changing process. Using molten salts, 2.20-4.65 MW of pumping work is required to change the pressure from 1 bar to 7 MPa. We selected BeF(2)-containing salts as the possible candidates based on preliminary economic and thermal hydraulic consideration. (C) 2010 Published by Elsevier B.V.
Publisher
ELSEVIER SCIENCE SA
Issue Date
2010-10
Language
English
Article Type
Article; Proceedings Paper
Keywords

IODINE-SULFUR PROCESS; THERMOCHEMICAL CYCLE; DECOMPOSITION; REACTOR; DESIGN

Citation

NUCLEAR ENGINEERING AND DESIGN, v.240, no.10, pp.2957 - 2962

ISSN
0029-5493
URI
http://hdl.handle.net/10203/101049
Appears in Collection
NE-Journal Papers(저널논문)
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