Dear Dhandapani,

Check the attached documents.

Best Regards

Hi dear Dhandapani;

isn't it dependent on;

1- how much space you got for the pond

2- how large pond

3- your budgetAdd your answer

4- will you refresh the water in pond frequently?

5- are you gonna use additional heater for pond?

etc...

Tks for your response

Dear Dhandapani,

Check the attached documents.

Best Regards

Dear Dhandapani,

Based on my researches, it depends on what you're looking for. For example, if you're looking for a better performance in small-scale ponds, inclined walls can help you a lot.

Please describe the purpose of the project.  I am an energy expert and would like to know what you are going to us this for.  Is it to create a power systems or are you doing reflective system or just thermal?  Can you elaborate on the systems demand? 

It's an thermal energy storage system sir

so, you are going to make a salt gradient pond.

you'd better consider the capacity of the storage first, then you may decide on the depth and surface area.

Do you have a location picked out yet?  What is the expected size and output?

this may help you:

http://www.iiste.org/Journals/index.php/JETP/article/download/8454/8419

In flat land of low cost rectangular shape is chosen for efficiency of removing fill, unless the pond is filled from a central well in which case the shape is circular.

In land that is high cost and not flat the shape conforms to the topography and cost advantage.

Whom answered before, they have done idoneous suggestions, only i would propose to paint of black the inner and the exterior.

Regards

Any shape that provides more surface area posing Sun would do. May be tubular or any surface with concavity.

Dear Sathish Dhandapani,

We have built a solar pond with cylindrical shape for demonstration and teaching purposes in Costa Rica with good results for calorific energy storage, you can see some data and pictures, although the original publication is in spanish, you may get some ideas.

Solar ponds for power generation will require rectangular shape (surface) and pyramidal or cylindrical (bottom).

Shalom 

Conference Paper Estudio de un Estanque Solar para Almacenar Energía Calórica...

Dear George A Van Housen size is 1 m2 and location in Coimbatore