Isobaric specific heat capacity of water and aqueous cesium chloride solutions for temperatures between 298K and 370K at p=0.1MPa

Lourenço, Maria José; Santos, F.J.V.; Ramires, M. L. V.; Castro, C. A. Nieto de

doi:10.1016/j.jct.2005.10.010

Cited by 14 publications

(9 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The uncertainty of the temperature is estimated to be ( 1 K. Heat capacity measurements were measured with a differential scanning calorimeter (DSC-111, Setaram, France), which was calibrated in enthalpy (Joule effect) and temperature (CRMs, LGC, UK). 22,23 The melting temperatures of Hg, Ga, In, Sn, Pb, and Zn were used to calibrate the temperature indicated by the instrument and the heat of fusion of these metals was used to assess the calibration uncertainty due to the Joule effect. Table 2 shows the reference materials used, their origin and purity, as well as the recommended values for the enthalpies and temperatures of fusion.…”

Section: Methodsmentioning

confidence: 99%

Thermal Properties of Ionic Liquids and IoNanofluids of Imidazolium and Pyrrolidinium Liquids

et al. 2009

View full text Add to dashboard Cite

Complex systems based on nanomaterials and common solvents have been shown to have thermophysical properties that can revolutionize current utilization of heat transfer fluids and heat storage cycles. This has been made possible by the existence of thermal conductivity enhancements derived from the presence of additional mechanisms of heat transfer in comparison with the base solvent. Ionic liquids have been shown to have thermophysical properties that justify the replacement of several of the chemical processes now under exploitation, and some of the solvents used, because they can in certain conditions, be considered as green solvents. Dissolving (or mixing as a thermally stable suspension) nanoparticles in ionic liquids, forms “bucky gels”, or IoNanoFluids, which we have recently shown to have thermal conductivity enhancements ranging from (5 to 35) %. This paper reports data on the thermal conductivity of the ionic liquids 1-hexyl-3-methylimidazolium tetrafluoroborate (CAS Number, 244193-50-8), [C6mim][BF4], 1-butyl-3-methylimidazolium hexafluorophosphate (CAS Number, 174501-64-5), [C4mim][PF6], 1-hexyl-3-methylimidazolium hexafluorophosphate (CAS Number, 304680-35-1), [C6mim][PF6], 1-butyl-3-methylimidazolium trifluoromethanesulfonate (CAS Number, 174899-66-2), [C4mim][CF3SO3], and 1-butyl-1-methylpyrrolidinium bis{(trifluoromethyl)sulfonyl}imide (CAS Number, 223437-11-4), [C4mpyrr][(CF3SO2)2N], and IoNanofluids with multiwalled carbon nanotubes (MWCNTs) as a function of temperature and discuss the molecular theories of heat transfer and storage in these types of systems. Moderate thermal conductivity enhancements, between (2 and 9) %, were found for the systems studied, showing a week dependence on temperature. It also reports heat capacity values for [C4mim][BF4] and [C4mim][PF6]. Values of the heat capacity of an IoNanofluid, C4mim][PF6] with (1 and 1.5) % Baytubes, are reported for the first time, showing also an enhancement (8 %), a fact that deserves further investigation in a near future. The behavior of these nanofluids, along with that of ionic liquids of the type studied, suggests that nanocluster formation and preferred paths for heat transfer and storage are present and are likely to be the cause of the phenomena found. However, existing theories cannot yet explain the results obtained.

show abstract

Section: Methodsmentioning

confidence: 99%

Thermal Properties of Ionic Liquids and IoNanofluids of Imidazolium and Pyrrolidinium Liquids

et al. 2009

View full text Add to dashboard Cite

show abstract

“…Based on the standard deviations of experimental and calibration data, the uncertainty of the thermal conductivity and temperature measurements were estimated to be ± 0.005 Wm -1 ·K -1 and ± 1 K, respectively. On the other hand, the heat capacity measurements were performed with a differential scanning calorimeter (DSC-111, Setaram, France) which was calibrated in enthalpy (Joule effect) and temperature following the procedure described by (Nieto de Castro et al, 2000;;Lourenço et al, 2006). This calorimeter is a heat-flux DSC which operates based on the TianCalvet principle and uses a cylinder type measuring system composed by two sintered alumina cylinder tubes.…”

Section: Methodsmentioning

confidence: 99%

Thermal Properties of Ionic Liquids and Ionanofluids

Ribeiro¹,

Vieira²,

França³

et al. 2011

Ionic Liquids: Theory, Properties, New Approaches

View full text Add to dashboard Cite

“…Quality checks of all alloys were performed by DSC, using a TG-DSC111 from Setaram, France, determining the melting/freezing zones (in heating and cooling). The DSC was calibrated in enthalpy and temperature, according to procedures described previously [16,17]. Figure 4 shows one of such thermograms, obtained for alloy VII, proving that there are no impurities melting outside the expected zone, and that no solid-state phase transitions were present, except for a small perturbation at 262 • C that can be identified in the phase diagram (Fig.…”

Section: Experimental Apparatus and Methodsmentioning

confidence: 92%

Viscosity of Industrially Important Al–Zn Alloys. I-Quasi-eutectic Alloys

et al. 2010

View full text Add to dashboard Cite

Viscosity is a very important property in several fields of materials and metal processing. Many systems are still not fully characterized with regard to their thermophysical property data. In addition, as new alloys are developed or used, viscosity data are necessary to understand the best processing conditions. The data that are available frequently show large discrepancies. The effect of minor constituents is very difficult to model and can have a strong effect on the viscosity. Measurements of the viscosity of Zn-Al alloys, with a quasi-eutectic composition, were performed in the molten state, for temperatures between 690 K and 751 K. The measurements were performed with an oscillating cup viscometer, with an estimated uncertainty of 2 % to 5 %, depending on the alloy. The influence of other minor components, such as Pb, Mn, and Mg, on the viscosity of the alloys is discussed. It was concluded that Pb induces a decrease in viscosity, with Mg having the opposite effect, while the effect of Mn is not significant. All the alloys showed Newtonian behavior in the temperature range studied and a non-Arrhenius temperature dependence of viscosity, as usually found for pure molten metals.

show abstract

Isobaric specific heat capacity of water and aqueous cesium chloride solutions for temperatures between 298K and 370K at p=0.1MPa

Cited by 14 publications

References 11 publications

Thermal Properties of Ionic Liquids and IoNanofluids of Imidazolium and Pyrrolidinium Liquids

Thermal Properties of Ionic Liquids and IoNanofluids of Imidazolium and Pyrrolidinium Liquids

Thermal Properties of Ionic Liquids and Ionanofluids

Viscosity of Industrially Important Al–Zn Alloys. I-Quasi-eutectic Alloys

Contact Info

Product

Resources

About