Thermal conductivity of aqueous salt solutions at high temperatures and high concentrations

DiGuilio, Ralph M.; Teja, Amyn S.

doi:10.1021/ie00004a016

Cited by 26 publications

(31 citation statements)

References 8 publications

(12 reference statements)

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“…The thermal conductivity of aqueous solutions increases almost linearly with pressure, at constant temperature and concentration, but not with the same slope as that of pure water -see Figure 5.10 - (DiGuilio et al, 1990;DiGuilio and Teja, 1992;Bleazard et al, 1994;Bleazard and Teja, 1995;Abdulagatov and Magomedov, 1994, 1995a,b, 1997a,b, 1998, 1999a,b, 2000a,b, 2001Abdulagatov et al, 2004a,b). At high pressures, 40 MPa, and high concentrations, 20 mass.%, the absolute values of thermal conductivity of water are higher, by about 8-12%, than those of the aqueous salt solutions.…”

Section: Pressure Dependencementioning

confidence: 96%

“…As one can see from this table, all data were derived by the parallel-plate and the coaxialcylinder techniques, except only two datasets for LiBr by Bleazard et al (1994) and DiGuilio and Teja (1992) which were obtained by the transient hot-wire technique. We further note that almost all investigators quote an uncertainty of better than 2%.…”

Section: Experimental Techniquesmentioning

confidence: 99%

“…A number of such correlations and predictive schemes have been developed to calculate the thermal conductivity of aqueous salt solutions as a function of temperature (see for example, Riedel, 1951;McLaughlin, 1964;Chiquillo, 1967;Venart and Mani, 1971;Bibik et al, 1975;White et al, 1975;Yusufova et al, 1975a;Krönert and Schuberthy, 1977;Vargaftik et al, 1978;Ozbek and Pillips, 1980;Dietz et al, 1981;Alloush et al, 1982;Nagasaka et al, 1983;Matsunaga and Nagashima, 1983;Kawamata et al, 1988;Assael et al 1989;Nagasaka et al, 1989;DiGuilio et al, 1990;DiGuilio and Teja, 1992;Nieto de Castro, 1994, 2000). A review of the available correlations and predictive schemes for the thermal conductivity of aqueous salt solutions at low temperatures and concentrations has been reported by Horvath (1985).…”

Section: Temperature Dependencementioning

confidence: 99%

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Abdulagatov

Assael

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Section: Pressure Dependencementioning

confidence: 96%

Section: Experimental Techniquesmentioning

confidence: 99%

Section: Temperature Dependencementioning

confidence: 99%

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Thermal Conductivity

Abdulagatov

Assael

2008

Hydrothermal Experimental Data

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“…Screening of Buffers DiGuilio and Teja reported that the thermal conductivity of distilled water could be increased by the addition of different salts, 29) which suggested that tablets prepared using a salt solution could reach higher temperatures under microwave irradiation conditions than those prepared using only water. Moreover, Ishida showed that Pre CFA and Pre CFB were converted to CFA and CFB much more readily under alkaline conditions, and that significant increases in the CFA and CFB contents were observed with increasing pH.…”

Section: Properties Of Odtts Prepared Using Distilled Watermentioning

confidence: 99%

Preparation of Orally Disintegrating Tablets Containing Powdered Tea Leaves with Enriched Levels of Bioactive Compounds by Means of Microwave Irradiation Technique

Tanaka

Iwao

Izumikawa

et al. 2016

CHEMICAL & PHARMACEUTICAL BULLETIN

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In the present study, a microwave treatment process has been applied to prepare orally disintegrating tablets (ODTs) containing powdered tea leaves with enriched levels of the anti-inflammatory compounds such as chafuroside A (CFA) and chafuroside B (CFB). The use of distilled water as the adsorbed and granulation solvents in this preparation process afforded tablets with a long disintegration time (more than 120 s). The CFA and CFB contents of these tablets did not also change after 4 min of microwave irradiation due to the tablet temperature, which only increased to 100°C. In contrast, the tablet temperature increased up to 140°C after 3 min of microwave irradiation when a 1.68 M Na 2 HPO 4 solution instead of distilled water. Notably, the disintegration time of these tablets was considerably improved (less than 20 s) compared with the microwaveuntreated tablets, and there were 7-and 11-fold increases in their CFA and CFB contents. In addition, the operational conditions for the preparation of the tablets were optimized by face-centered composite design based on the following criteria: tablet hardness greater than 13 N, disintegration time less than 30 s and friability less than 0.5%. The requirements translated into X 1 (the amount of granulation solvent), X 2 (tableting pressure) and X 3 (content of the powdered tea leaves) values of 45%, 0.43 kN and 32%, respectively, and the ODTs containing powdered tea leaves prepared under these optimized conditions were found to show excellent tablet properties and contain enriched levels of CFA and CFB.

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“…Thermal conductivity of a NaCl solution was used to replace that of GSL water in the model, because NaCl represents ~76% of dissolved salts in the lake (Dickson et al, 1965). Thermal conductivity of a NaCl solution (Yusufova et al, 1975;Ozbek and Phillips, 1980;Diguilio and Teja, 1992) was fi t to the observations as…”

Section: Salinity Parameterization Of Thermal Conductivitymentioning

confidence: 99%

Impacts of salinity parameterizations on temperature simulation over and in a hypersaline lake

Wen

Nagabhatla

Zhao

et al. 2015

Chin. J. Ocean. Limnol.

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In this paper, we introduced parameterizations of the salinity effects (on heat capacity, thermal conductivity, freezing point and saturated vapor pressure) in a lake scheme integrated in the Weather Research and Forecasting model coupled with the Community Land Model (WRF-CLM). This was done to improve temperature simulation over and in a saline lake and to test the contributions of salinity effects on various water properties via sensitivity experiments. The modifi ed lake scheme consists of the lake module in the CLM model, which is the land component of the WRF-CLM model. The Great Salt Lake (GSL) in the USA was selected as the study area. The simulation was performed from September 3, 2001 to September 30, 2002. Our results show that the modifi ed WRF-CLM model that includes the lake scheme considering salinity effects can reasonably simulate temperature over and in the GSL. This model had much greater accuracy than neglecting salinity effects, particularly in a very cold event when that effect alters the freezing point. The salinity effect on saturated vapor pressure can reduce latent heat fl ux over the lake and make it slightly warmer. The salinity effect on heat capacity can also make lake temperature prone to changes. However, the salinity effect on thermal conductivity was found insignifi cant in our simulations.

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Thermal conductivity of aqueous salt solutions at high temperatures and high concentrations

Cited by 26 publications

References 8 publications

Thermal Conductivity

Thermal Conductivity

Preparation of Orally Disintegrating Tablets Containing Powdered Tea Leaves with Enriched Levels of Bioactive Compounds by Means of Microwave Irradiation Technique

Impacts of salinity parameterizations on temperature simulation over and in a hypersaline lake

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