Large Water Chiller Design for use in cold plunges

I'm seeking an experienced designer to create a blueprint for a chiller tank that stores cold water and an deliver the water to a standard bathtub. The project requires nonpareil knowledge of materials, such as stainless steel, and an understanding of how to work with large capacities, as the tank needs to store more than 500 liters. Key skills and experience include:

• Proficient in industrial design, particularly with liquid storage tanks
• Extensive knowledge in working with stainless steel materials
• Comprehensive understanding of large volume storage designs
- an understanding of chiller system and standard household plumbing

The concept is to fabricate contemporary and durable design that primes for efficiency and cost-effectiveness. Please include any relevant experience in your proposal.