Designing Thermal Energy Storage (TES) and Buffer tanks requires a meticulous approach to ensure they effectively store and release thermal energy as needed for HVAC systems, renewable energy integration, and industrial applications. At Mechartes, we specialize in guiding clients through the comprehensive process of designing TES / Buffer tanks, covering mechanical, process, and structural aspects.

Our approach integrates advanced Computational Fluid Dynamics (CFD) analysis to optimize diffuser design. We conduct detailed small-scale CFD analyses to assess diffuser configurations, including inlet pipe diameters, lengths, diffuser heights, and internal baffle arrangements. This ensures achieving low velocities and uniform distribution at diffuser outlets under maximum flow conditions.

Based on these analyses, we select the most suitable design and proceed with full-scale transient CFD simulations. These simulations provide insights into velocity, temperature profiles, thermocline thickness, and Figure of Merit (FOM) during both charging and discharging modes, aligning with guidelines from the 2020 ASHRAE Handbook—HVAC Systems and Equipment, Chapter 50 on Thermal Storage.

For structural integrity, we adhere to EN-144-15-2205 standards, ensuring robust construction using appropriate materials for the tank’s shell, roof, bottom plate, annular plate, structural members, compression ring, stiffeners, stairs, and platforms. Detailed fabrication drawings accompany our structural analyses, ensuring compliance with safety and performance requirements throughout the tank’s lifecycle.