Experimental study of natural brine solar ponds in Tibet

Nie, Zhen; Bu, Lingzhong; Zheng, Mianping; Huang, Weinong

doi:10.1016/j.solener.2011.04.011

Cited by 93 publications

(27 citation statements)

References 9 publications

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“…They achieved a maximum temperature of 47°C when the ambient temperature was approximately 30°C. Nie et al (2011) constructed a large-scale shallow salt gradient solar pond using the natural brine of a local salt lake in the Tibet plateau. They observed that the LCZ temperature varied from 20°C to 40°C over one year.…”

Section: Introductionmentioning

confidence: 99%

Key factors impacting performance of a salinity gradient solar pond exposed to Mediterranean climate

et al. 2017

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a b s t r a c t Solar ponds are low cost pools of brine solutions with integrated storage zones that harvest incident solar energy and store it as thermal energy. The current study examined the performance of a salinity gradient solar pond under the Mediterranean climatic condition for ten consecutive months of operation, from October 8, 2014 to July 31, 2015. The presented results are based on the experimental data of a smallscale circular pond, 61 cm in diameter a height of 55 cm, constructed and operated at Middle East Technical University, Northern Cyprus Campus (METUNCC). The study showed the necessity of regular surface washing and having excess undissolved salt at the lower convective zone (LCZ) to maintain the pond stability. The variations in the temperature of the non-convective (NCZ) and lower convective zones (LCZ) are found to be a function of both ambient temperature and solar irradiation (insolation). The variation of the overall pond's temperature strongly follows the changes in ambient temperature while solar insolation directly affects the increase in temperature gradient by depth. During the period of this study, the pond reached the highest average temperature of 48°C in July 2015 while the average ambient temperature for this month was 30°C.

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Section: Introductionmentioning

confidence: 99%

Key factors impacting performance of a salinity gradient solar pond exposed to Mediterranean climate

et al. 2017

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“…(8). The standard deviations of the overall fitting with respect to the terms ln a w , ln γ 7 , Δ dil H m /RT, ϕ L m /RT, ϕ C p,m /R, and ln K are 0.007, 0.085, 0.0324, 0.0218, 0.1358, 0.3207, and 0.0286, respectively.…”

Section: Thermodynamic Modeling Of the Licl þH 2 O Systemmentioning

confidence: 93%

“…For example, halite usually precipitates from a chloride-sulfate type brine during evaporation processes in the summer, while mirabilite precipitates in the winter. Based on the fact that Li 2 CO 3 solubility decreases with increasing temperature, a novel Li-extraction approach has been proposed to precipitate Li 2 CO 3 from a carbonate-type brine at high temperatures [8]. In these cases, the influence of temperature on the crystallization route of brine can be significant.…”

Section: Introductionmentioning

confidence: 99%

Phase diagrams and thermochemical modeling of salt lake brine systems. I. LiCl+H2O system

Zeng

Han

et al. 2015

Calphad

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“…Cities in the Prairies (Regina, Calgary, and Winnipeg) generally rank higher and the annual insolation values in various locations cor-relate with the latitude (R 2 = 0.64). As mentioned earlier, latitude is not the only factor determining the annual insolation amount because locations of similar latitude are affected by seasonal weather and the site elevation (Nie et al, 2011). Nonetheless, French et al (1985) concluded that SGSP is suitable for North American climate and that such facilities continuously produce heat required for domestic use in Ohio and industrial application in New Mexico.…”

Section: Practical Logisticsmentioning

confidence: 99%

Feasibility of Saline Gradient Solar Ponds as Thermal Energy Sources in Saskatchewan, Canada

Ito¹,

Azam²

2019

J ENVIRON INFORM LET

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Advancement of renewable energy is critical for sustainable development. This paper evaluates the feasibility of saline gradient solar ponds (SGSP) as an alternative energy source for Saskatchewan, Canada. The main achievements include global appraisal of SGSP from theoretical and practical perspectives, assessment of salinity and climatic criteria for SGSP potential, understanding of heat transfer mechanisms affected by thermophysical properties, and numerical modeling to simulate transient heat diffusion in SGSP. Results indicated that Saskatchewan is ideal for thermal energy harvesting from saline water bodies because of high solar insolation (1100 to 1400 kWh/m 2). The solar radiation in such systems is captured under a salt concentration gradient. Locally, ten potash tailings sites (360 g/L or 36% salt) and two saline water lakes (250 g/L or 25% salt) are potentially suitable for SGSP deployment. It was found that thermal conductivity increases with temperature but decreases with water salinity increase (0.55 to 0.675 W/mK) and the opposite is true for density (1000 to 1200 kg/m 3). Similarly, specific heat capacity slightly increases with temperature and inversely correlates with salinity (3000 to 4200 J/kg K). Furthermore, the heat diffusion model adequately simulated the temperature distribution for a typical SGSP in a potash tailings containment facility. For the investigated month of July (highest solar insolation), the temperatures increased from an initial value of at 20 to 52 º C at top to 37 º C at bottom. A comprehensive risk assessment of this method is required to protect air, water, soil, and biota at specific sites.

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Experimental study of natural brine solar ponds in Tibet

Cited by 93 publications

References 9 publications

Key factors impacting performance of a salinity gradient solar pond exposed to Mediterranean climate

Key factors impacting performance of a salinity gradient solar pond exposed to Mediterranean climate

Phase diagrams and thermochemical modeling of salt lake brine systems. I. LiCl+H2O system

Feasibility of Saline Gradient Solar Ponds as Thermal Energy Sources in Saskatchewan, Canada

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