Monitoring and maintaining the water clarity of salinity gradient solar ponds

Solar Energy ◽  
2011 ◽  
Vol 85 (11) ◽  
pp. 2987-2996 ◽  
Author(s):  
Naheed Malik ◽  
Abhijit Date ◽  
Jimmy Leblanc ◽  
Aliakbar Akbarzadeh ◽  
Barry Meehan
Keyword(s):  
Salinity Gradient ◽  
Water Clarity ◽  
Solar Ponds

Thermal Heat Storage Gain of Salinity Gradient Solar Pond Using Evacuated Tube Solar Collectors

2015 ◽  
Vol 1113 ◽  
pp. 800-805 ◽  
Author(s):  
Baljit Singh ◽  
Muhammad Fairuz Remeli ◽  
Alex Pedemont ◽  
Amandeep Oberoi ◽  
Abhijit Date ◽  
...  
Keyword(s):  
Large Scale ◽  
Heat Storage ◽  
Salinity Gradient ◽  
Heat Energy ◽  
Working Fluid ◽  
The Sun ◽  
Solar Ponds ◽  
Solar Pond ◽  
Evacuated Tube Collectors ◽  
Evacuated Tube

This paper investigates the capability of running a system which uses hot fluid from solar evacuated tube collectors to boost the temperature and overall heat storage of the solar pond. The system is circulated by a solar powered pump, producing heat energy entirely from the incoming solar radiation from the sun. Solar evacuated tube collectors use a renewable source of power directly from the sun to heat the working fluid to very high temperatures. Solar ponds are emerging on the renewable energy scene with the capacity to provide a simple and inexpensive thermal storage for the production of heat on a large scale. The results of the performance of the system show a significant heat energy increase into the solar ponds lower convective region, increasing the overall performance of the solar pond.

Heat extraction methods from salinity-gradient solar ponds and introduction of a novel system of heat extraction for improved efficiency

Solar Energy ◽  
2011 ◽  
Vol 85 (12) ◽  
pp. 3103-3142 ◽  
Author(s):  
Jimmy Leblanc ◽  
Aliakbar Akbarzadeh ◽  
John Andrews ◽  
Huanmin Lu ◽  
Peter Golding
Keyword(s):  
Salinity Gradient ◽  
Extraction Methods ◽  
Heat Extraction ◽  
Solar Ponds

Desalination coupled with salinity-gradient solar ponds

Desalination ◽  
2001 ◽  
Vol 136 (1-3) ◽  
pp. 13-23 ◽  
Author(s):  
Huanmin Lu ◽  
John C. Walton ◽  
Andrew H.P. Swift
Keyword(s):  
Salinity Gradient ◽  
Solar Ponds

The Influence of Height of LCZ on the Salinity Diffusion of Solar Pond

2013 ◽  
Vol 448-453 ◽  
pp. 1521-1524
Author(s):  
Chun Juan Gao ◽  
Qi Zhang ◽  
Hai Hong Wu ◽  
Liang Wang ◽  
Xi Ping Huang
Keyword(s):  
Solar Energy ◽  
Fresh Water ◽  
Salt Water ◽  
Salinity Gradient ◽  
Good Method ◽  
Convective Zone ◽  
Solar Ponds ◽  
Solar Pond ◽  
Salt Gradient ◽  
And Diffusion

The solar ponds with a surface of 0.3m2were filled with different concentration salt water and fresh water. The three layer’s structure of solar ponds was formed in the laboratory ponds by using the salinity redistribution. The performance and diffusion of salinity were xperimentally in the solar pond. The measurements were taken and recorded daily at various locations in the salt-gradient solar pond during a period of 30 days of experimentation. The experimental results showed that the salinity gradient layer can sustain a longer time when the lower convective zone is thicker, which is benefit to store solar energy. Therefore, properly increasing the height of LCZ is a good method to enhance the solar pond performance.

Combining Mariculture and Seawater-Based Solar Ponds

1990 ◽  
Vol 112 (2) ◽  
pp. 90-97 ◽  
Author(s):  
Preston Lowrey ◽  
Richard Ford ◽  
Francisco Collado ◽  
Jane Morgan ◽  
Edward Frusti
Keyword(s):  
Striped Bass ◽  
Water Source ◽  
Ambient Air ◽  
Water Clarity ◽  
The United States ◽  
Daily Routine ◽  
Solar Ponds ◽  
Solar Pond ◽  
Influence Of Temperature On ◽  
Specific Species

Solar ponds have been thoroughly studied as a means to produce electricity or heat, but there may be comparable potential to use solar ponds to produce optimized environments for the cultivation of some aquaculture crops. For this, conventional brine-based solar ponds could be used. This strategy would probably be most suitable at desert sites where concentrated brine was abundant, pond liners might not be needed, and the crop produced could be shipped to market. Generally, a heat exchanger would be required to transfer heat from the solar pond into the culture ponds. Culture ponds could therefore use either fresh or marine water. In contrast, this paper explores what we name seawater-based solar ponds. These are solar ponds which use seawater in the bottom storage zone and fresh water in the upper convective zone. Because the required temperature elevations for mariculture are only about 10°C, seawater-based solar ponds are conceivable. Seawater-based ponds should be very inexpensive because, by the shore, salt costs would be negligible and a liner might be unnecessary. An initial paper described the design and preliminary experience with two 16 m2 seawater-based solar ponds adapted for mariculture during the winter of 1986-1987 (reference [1]). Subsystems designed for air injection, salt gradient maintenance, filtering to remove ammonia, feeding, and maintenance of water clarity were detailed. Typical temperature and salinity gradients and month-long temperature elevation performance were also presented. This paper presents follow-up experimental results. During Jan. and Feb. 1986, operation of the two seawater-based solar ponds with no cultivation in them produced sustained bottom temperatures averaging 25.5°C. During this period, the ambient air averaged 13.8°C and the overnight low averaged 8.9°C. Elevation of seawater to 20–28°C would be extremely useful for winter mariculture along the entire southern coastline of the United States. In contrast, during the winter of 1987–1988 formal growth comparison experiments were conducted with striped bass, (Morone saxatilis), growing within two replicate solar ponds and within two replicate, conventional, control ponds. Over six winter months the solar pond bottom temperatures averaged 6°C warmer than the ambient air. Fish weights in the solar ponds increased by a cumulative average of 1105 percent compared with 172 percent for fish in the control ponds. These results are in line with other studies of the influence of temperature on the growth rate of striped bass. Management of the solar ponds involved a simple daily routine. These two experiments, therefore, demonstrate the profound potential of combining suitably designed seawater-based solar ponds with mariculture in winter to raise water temperature and accelerate growth. The solar ponds could be used either (a) as a warm water source or (b) with cultivation directly in the solar ponds. With either approach seawater-based solar ponds can potentially be very inexpensive. Both strategies deserve continued study because they have distinct advantages. For case (b), more involved research will generally be required since the solar ponds and cultivation practice for a specific species must both be adjusted to work together.

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