TES Tanks | Bendel

Reliable cooling capacity when every second matters. Bendel designs and fabricates custom TES tanks that hold a reserve of chilled water — maintaining cooling through power transitions, generator transfers, equipment outages, and peak demand. Every tank is built to applicable ASME and API standards.

60+

Years of Code Certified Fabrication

850,000+

Square Feet of Production Capacity

ASME

Section VIII Fabrication

API

650 & 620 Tank Fabrication

Team. 1 Contract.

A thermal energy storage (TES) tank stores chilled water that a facility can use the moment it's needed — bridging the gap between a power interruption and full generator load, shifting cooling production to off-peak hours, and adding redundancy when demand peaks.

Bendel custom-designs and fabricates TES tanks to applicable ASME and API standards for data centers, mission-critical facilities, and industrial cooling systems. Properly engineered thermal storage improves operational resilience, reduces utility demand charges, and strengthens overall cooling system performance.

Because no two cooling plants are alike, every Bendel TES tank is engineered to project-specific requirements — from diffuser geometry and stratification targets to materials, capacity, and insulation.

At a Glance

• Bridges generator startup & transfer windows

• Shifts chiller load to lower-cost off-peak hours

• Adds cooling redundancy for peak loads

• Built & tested to ASME Section VIII / API 650 & 620

• Carbon or stainless · vertical or horizontal · any capacity

Maintain cooling during power transitions

TES tanks provide a critical reserve of chilled water during utility disruptions and generator startup sequences — ensuring uninterrupted cooling when infrastructure is most vulnerable.

• Bridges generator startup & transfer windows

• Maintain cooling during power interruptions

• Protect high-density server environments

• Support uptime and SLA requirements

• Reduce the risk of thermal excursions

Reduce energy & demand costs

TES systems let operators shift cooling production to off-peak periods when electricity costs are lower — improving overall system efficiency and economics.

• Shift chiller operations to off-peak hours

• Lower utility demand charges

• Improve chiller operating efficiency

• Reduce peak electrical loads

• Support long-term energy management initiatives

Strengthen system resilience

By adding stored cooling capacity, TES tanks improve system stability and provide an additional layer of protection during periods of elevated demand.

• Add cooling redundancy

• Stabilize thermal performance during peak loads

• Improve operational flexibility

• Support future facility expansion

• Enhance long-term infrastructure reliability

Data Centers

Colocation Facilities

Hyperscale Data Centers

AI & High-Density Computing

Industrial Facilities

Central Utility Plants

District Cooling Systems

Manufacturing Operations

Government & Defense

Healthcare

01/ STANDARDS

Performance Enginee

• ASME Section VIII fabrication

• API 650 and API 620 tank fabrication

• Custom-engineered TES configurations

• Full-code compliant fabrication & testing

02/ CONFIGURATIONS

Configuration Options

• Vertical TES tank design

• Horizontal TES tank design

• Shop-fabricated & field-erected

• Carbon steel construction

• Stainless steel construction

• Custom capacities & dimensions

03/ PERFORMANCE

Performance Engineering

• Application-specific diffuser design

• Optimized thermal stratification

• Custom nozzle placement

• MEP coordination

• Climate-specific insulation systems

• Platforms, ladders & appurtenances

04/ DOCUMENTATION

Quality Assurance

• Hydrostatic Testing

• Comprehensive QC inspections

• Full ASME/API documentation

• Material traceability

• Third-party inspection support

• Commissioning support documentation

STEP 01 - CHARGE

Run Chillers Off-Peak

Chillers fill the tank with chilled water overnight, when electricity is cheapest and conditions are most efficient.

STEP 02 - STORE

Hold a Stratified Reserve

Engineered diffusers keep cold supply and warm return separated, preserving the tank's full usable cooling capacity.

STEP 03 - DISCHARGE

Deliver Cooling Instantly

At peak load — or the instant power drops — stored chilled water flows on demand, bridging the gap until full cooling returns.

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