Study of the heating capacity enhancement of solar salts by the addition os silica nanoparticles
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Study of the heating capacity enhancement of solar salts by the addition os silica nanoparticlesAutoria
Tutor/Supervisor; Universitat.Departament
Martí, Sergio; Sancho Llopis, Juan Vicente; Universitat Jaume I. Departament de Química Física i AnalíticaData de publicació
2020-07-24Editor
Universitat Jaume IResum
Over the last years, solar thermal salts have been studied as natural solution for
storage and heat transfer in Concentrating Solar Power Plants (CSP). This new kind of
renewable energy has become one of the alter ... [+]
Over the last years, solar thermal salts have been studied as natural solution for
storage and heat transfer in Concentrating Solar Power Plants (CSP). This new kind of
renewable energy has become one of the alternatives of fossil fuels. The CSP plants
transform the solar energy into electricity by the Thermal Energy Storage (TES)
properties of this kind of material, which allows to store large amounts of heat. These
types of salts provide a high thermal stability, low material costs, high density of the salt
fluid, high heat storage capacity, non-flammability and low vapor pressure. In addition,
compared with organic salts these inorganic salts present a higher melting point.
[1]
A large quantity of inorganic salts have been used as solar salt systems in CSP plants,
mixtures of carbonates (Li2CO3 and K2CO3), mixtures of chlorides (BaCl2, NaCl and CaCl2)
and finally, the most commonly used, a mixture of sodium and potassium nitrates
(NaNO3:KNO3).
[2]
An interest in the enhancement of the heat capacity in solar salts with the addition of
nanoparticles has been grown in the last years. In 2011, Shin and Banerjee [3]
reported
an unusual specific heat enhancement when silica nanoparticles were added to
carbonate and chloride salts mixtures. These results were obtained when the solar salts
were doped with 1-2 %wt of nanoparticles. The increase of the specific heat of the
nanofluid seems to be against the mixture rule, which states that the specific heat of a
nanofluid should decrease if the added nanoparticles have a lower specific heat than the
fluid itself. This theory applies to molecular liquids, such as alcohols, thermal oils,
ethylene glycol or water.
[...] [-]
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Descripció
Treball Final de Grau en Química. Codi: QU0943. Curs acadèmic: 2019/2020
Tipus de document
info:eu-repo/semantics/bachelorThesisDrets d'accés
info:eu-repo/semantics/openAccess
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