Chemical Storage Tank Chiller

Please tell me how can i design the Chemical tank chiller.

or recommend the available vendor.

1. NaOCl, 30m3

2. Location is middle-east, Temp. is 55C

3. Target Temp. is 15C

4. I consider the direct cooling, using the titanium coil in the chemical tank.

5. Chemical tank M'trl is GRP