Effect of Ground Condition on the Storage Zone Temperature of Salinity Gradient Solar Pond

2019 ◽  
pp. 563-570
Author(s):  
Shyamal G. Chakrabarty ◽  
Uday S. Wankhede ◽  
Pramod V. Walke ◽  
Trushar B. Gohil
Keyword(s):  
Salinity Gradient ◽  
Solar Pond ◽  
Storage Zone ◽  
Ground Condition ◽  
Zone Temperature

Assessing the Maximum Stability of the Nonconvective Zone in a Salinity-Gradient Solar Pond

2017 ◽  
Vol 139 (4) ◽  
Author(s):  
A. A. Abdullah ◽  
K. A. Lindsay
Keyword(s):  
Salinity Gradient ◽  
Fluid Velocity ◽  
Weather Conditions ◽  
Convective Zone ◽  
Heat Extraction ◽  
Solar Pond ◽  
Maximum Stability ◽  
Storage Zone ◽  
The Stability

The quality of the stability of the nonconvective zone of a salinity-gradient solar pond (SGSP) is investigated for an operating protocol in which the flushing procedure exactly compensates for evaporation losses from the solar pond and its associated evaporation pond. The mathematical model of the pond uses simplified, but accurate, constitutive expressions for the physical properties of aqueous sodium chloride. Also, realistic boundary conditions are used for the behaviors of the upper and lower convective zones (LCZs). The performance of a salinity-gradient solar pond is investigated in the context of the weather conditions at Makkah, Saudi Arabia, for several thickness of upper convective zone (UCZ) and operating temperature of the storage zone. Spectral collocation based on Chebyshev polynomials is used to assess the quality of the stability of the pond throughout the year in terms of the time scale for the restoration of disturbances in temperature, salinity, and fluid velocity underlying the critical eigenstate. The critical eigenvalue is found to be real and negative at all times of year indicating that the steady-state configuration of the pond is always stable, and suggesting that stationary instability would be the anticipated mechanism of instability. Annual profiles of surface temperature, salinity, and heat extraction are constructed for various combinations for the thickness of the upper convective zone and storage zone temperature.

Effect of Water Distribution Ways on the Operation of Solar Pond

2013 ◽  
Vol 805-806 ◽  
pp. 74-77
Author(s):  
Chun Juan Gao ◽  
Qi Zhang ◽  
Liang Wang ◽  
Ying Wang ◽  
Xi Ping Huang
Keyword(s):  
Water Distribution ◽  
Salinity Gradient ◽  
Convective Zone ◽  
The Body ◽  
Solar Ponds ◽  
Solar Pond ◽  
Storage Zone ◽  
Small Model ◽  
Laboratory Tank ◽  
Salt Diffusion

An experimental study on the evolution of the salinity profiles in the salinity gradient solar ponds was executed using a small model pond. The body of the simulated pond is a cylindrical plastic tank, with 50 cm height and 45 cm diameter. The salinity gradient was established in the laboratory tank by using the salinity redistribution technique. The measurements were taken during a period of 20 days of experimentation. This period of time allowed the existence of salt diffusion from the storage zone to the surface. Results obtained from this study show that when the ratio of brine/water is 1/1, the salinity gradient layer can sustain a longer time and the lower convective zone is thicker, which is benefit to store solar energy.

scholarly journals A Prototype of Salt Gradient Solar Pond as Alternative Energy Source for Coastal Communities in Bengkulu

2019 ◽  
Vol 2 (2) ◽  
pp. 25-27
Author(s):  
Afdhal Kuniawan Mainil
Keyword(s):  
Alternative Energy ◽  
Saline Solution ◽  
Salt Water ◽  
Salinity Gradient ◽  
Maximum Temperature ◽  
Average Temperature ◽  
Solar Pond ◽  
Storage Zone ◽  
Salt Gradient ◽  
Further Development

One of the developing technologies of renewable energy is the Salt Gradient Solar Pond (SGSP). SGSP utilize solar energy by storing its thermal energy in a pond of saline solution. Bengkulu Province has a high intensity of sunlight and a long coastline with an abundance of salt water. Therefore, it is a very suitable location for further development of SGSP technology. The design of SGSP prototype had been carried out by using a 1 m3 cylinder as the saline solution pond. The density and temperature of the solution were measured at 11 points from the bottom to the top of the cylinder. The results show that the keeper of the pond, the more density of the solution, in which the highest solution density was at the bottom of the pond, i.e., 1.206 gr/cm3. The average temperature of the solution was 44.2°C. The maximum temperature, which was 48.7 °C, was observed around the storage zone, about 0.3 m from the pond‘s bottom. The results of the measurements of salinity gradient and temperatures show that this prototype of SGSP is appropriate to be used for storing heat around the storage zone.

Gradient-Zone Erosion by Extraction in Solar Ponds

1995 ◽  
Vol 117 (2) ◽  
pp. 144-150 ◽  
Author(s):  
J. Estevadeordal ◽  
S. J. Kleis
Keyword(s):  
Steady State ◽  
Salinity Gradient ◽  
Operating Conditions ◽  
Density Difference ◽  
Finite Density ◽  
Gradient Zone ◽  
Solar Ponds ◽  
Solar Pond ◽  
Flow Parameters ◽  
Storage Zone

The erosion the dynamically stable gradient zone of a salinity-gradient solar pond, due to the extraction of fluid from the storage zone, is numerically investigated. The effects of fluid withdrawal rate, density stratification level, pond and diffuser geometries, and diffuser placement are considered. It is found, for a typical salinity-gradient solar pond with uniform salinity in the storage zone and a continuous salinity gradient above that a finite amount of fluid entrainment from the gradient zone is inevitable. That is, a finite density difference across the interface is always required for a finite extraction rate under steady-state conditions. The magnitude of the density difference is predicted as function of the geometric and flow parameters. From the results, it is possible to predict the total amount of fluid entrained from the gradient zone as the pond reaches steady-state for prescribed operating conditions.

scholarly journals Industrial Heating application of a Salinity gradient solar pond for salt production

2019 ◽  
Vol 160 ◽  
pp. 231-238 ◽  
Author(s):  
Mohammed Bawahab ◽  
Hosam Faqeha ◽  
Quoc Line Ve ◽  
Ahmadreza Faghih ◽  
Abhijit Date ◽  
...  
Keyword(s):  
Salinity Gradient ◽  
Salt Production ◽  
Solar Pond ◽  
Industrial Heating

Dynamic effects in a salinity-gradient solar-pond heating system

1985 ◽  
Vol 20 (3) ◽  
pp. 189-205 ◽  
Author(s):  
M.T. Kangas ◽  
P.D. Lund
Keyword(s):  
Salinity Gradient ◽  
Heating System ◽  
Dynamic Effects ◽  
Solar Pond

scholarly journals Design, construction, and operation of the first industrial salinity-gradient solar pond in Europe: An efficiency analysis perspective

Solar Energy ◽  
2018 ◽  
Vol 164 ◽  
pp. 316-326 ◽  
Author(s):  
A. Alcaraz ◽  
M. Montalà ◽  
J.L. Cortina ◽  
A. Akbarzadeh ◽  
C. Aladjem ◽  
...  
Keyword(s):  
Salinity Gradient ◽  
Efficiency Analysis ◽  
Solar Pond ◽  
Design Construction

The Effect of a Liquid Cover on the Thermal Performance of a Salinity Gradient Solar Pond: An Experimental Study

2022 ◽  
Vol 119 (1) ◽  
pp. 17-34
Author(s):  
Asaad H. Sayer ◽  
Mohsin E. Al-Dokheily ◽  
Hameed B. Mahood ◽  
Haider M. Khadem ◽  
Alasdair N. Campbell
Keyword(s):  
Experimental Study ◽  
Thermal Performance ◽  
Salinity Gradient ◽  
Solar Pond
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