scholarly journals Effect of heat extraction on the thermal efficiency of salt gradient solar pond

2018 ◽  
Vol 37 (5) ◽  
pp. 1502-1515
Author(s):  
Qi Wu ◽  
Hua Wang ◽  
Shukuan Xie ◽  
Liugang Zhang ◽  
Jie Wang ◽  
...  
Keyword(s):  
Thermal Efficiency ◽  
Heat Extraction ◽  
Solar Pond ◽  
Salt Gradient

Temperature evolution of an experimental salt-gradient solar pond

2010 ◽  
Vol 1 (4) ◽  
pp. 246-250 ◽  
Author(s):  
F. Suárez ◽  
A. E. Childress ◽  
S. W. Tyler
Keyword(s):  
High Resolution ◽  
Large Scale ◽  
Thermal Evolution ◽  
Low Cost ◽  
Heat Extraction ◽  
Low Grade ◽  
Distributed Temperature Sensing ◽  
Solar Pond ◽  
Thermal Desalination ◽  
Salt Gradient

A salt-gradient solar pond is a low-cost, large-scale solar collector with integrated storage that can be used as a source of energy in low-grade-heat thermal desalination systems. This work presents the thermal evolution of an experimental solar pond for both the maturation and heat extraction time periods. The temperature profile was measured every 1.1 cm using a vertical high-resolution distributed temperature sensing (DTS) system, with a temperature resolution of 0.04ºC. Temperatures of 34 and 45ºC were achieved in the bottom of the pond when the lights were on for 12 and 24 hours per day, respectively. Heat was extracted at a rate of 139 W from the solar pond, which corresponded to an efficiency of 29%. Stratification and mixing were clearly observed inside the solar pond using the vertical high-resolution DTS system.

Transient heat extraction modeling method for a rectangular type salt gradient solar pond

2017 ◽  
Vol 132 ◽  
pp. 316-326 ◽  
Author(s):  
Mohamad Aramesh ◽  
Fathollah Pourfayaz ◽  
Alibakhsh Kasaeian
Keyword(s):  
Modeling Method ◽  
Heat Extraction ◽  
Solar Pond ◽  
Salt Gradient

scholarly journals Heat extraction from the ANL research salt gradient solar pond

1986 ◽  
Author(s):  
J. Hull ◽  
A. Scranton ◽  
J. Mehta ◽  
S. Cho ◽  
K. Kasza
Keyword(s):  
Heat Extraction ◽  
Solar Pond ◽  
Salt Gradient

scholarly journals Empirical and numerical investigation on the thermal efficiency of a tripartite transparent covered hexagonal composite salt-gradient solar pond with East-West side reflector

2021 ◽  
Author(s):  
Sathish D ◽  
Jegadheeswaran S
Keyword(s):  
Energy Storage ◽  
Solar Radiation ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Thermal Efficiency ◽  
West Side ◽  
Solar Pond ◽  
Triple Layer ◽  
Salt Gradient ◽  
East West

Abstract A salt gradient solar pond represents an eco-friendly and cost-efficient minimal thermal energy storage device. Solar ponds provide an efficient means of capturing and storing solar radiation, rendering it an acceptable alternative to photovoltaic thermal systems for applications requiring a lesser amount of thermal energy to function. It is crucial to enrich the efficiency of the salt gradient solar pond to boost its thermal energy storage. It was efficaciously achieved with the application of salt mixtures, reflectors, and a glazed layer. This current study investigates the hexagonal composite salinity gradient solar pond (HCSGSP) augmented with a dual inclined reflector and triple-layer transparent cover. Measured the ambient temperature, the temperature of layers, solar radiation, inside and outside temperature of the glazed layer. The hexagonal composite salt solar pond unit prevailed with three distinct layers, namely top convective, middle non-convective, and bottom convective layers having varying densities saturated with saline water and freshwater. A micro solar pond having a hexagonal cross-section was fabricated and experimented at Coimbatore, India having a datum and surface area of 1 m and 0.679 m2 respectively. The use of composite salt (Sodium chloride 30%, Magnesium chloride 10%, and Potassium chloride 60%) enhanced the daily average ponds’ temperature. The pond’s upper portion was packed with a triple layer glazed cover which shows an uplift of thermal energy and provided with an east, west side direction inclined reflectors made of plywood fixed with mirrors increases the solar radiation intensity during the nocturnal and diurnal period of the pond. The pond with composite salt, glass layers, and reflectors showed the thermal efficiency of top convective, middle non-convective, and bottom convective layers have been observed to be 23.44%, 30.68%, and 35.63% respectively. Further, it expands its research to determine the shading owing to sidewalls, which have a significant impact on the incident solar radiation and storage of heat energy in the hexagonal salt gradient solar pool. Energy balance numerical equations were modeled for all layers in the pond and were determined mathematically. It validated the suggested framework with the figured out experimental values.

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