Heat transfer systems are crucial to providing indirect heating and cooling in many industrial processes. A critical component in these systems is the thermal expansion tank, which helps manage the significant volume changes resulting from heated fluid. Fluid volume can expand by up to 30% when reaching operating temperatures. This makes an effective expansion tank necessary for safety and efficiency.
A well-designed thermal expansion tank serves multiple functions:
- It acts as the main venting point for moisture and low-boiling components.
- It provides positive head pressure for circulating pumps.
- It maintains a reservoir of fluid at a lower temperature than the fluid circulating through the system.
Proper tank sizing is critical. Guidelines suggest a 25% cold-level
capacity and a maximum of 75% when operating at peak temperatures to
ensure adequate fluid availability and vapor disengagement.
Placing the expansion tank at the highest point in the system optimizes gas collection and improves pump efficiency. A double-drop-leg design is often preferred because it can maintain fluid flow and venting capabilities while in use.
Safety cannot be overlooked. Instrumentation for level measurement and overpressure relief helps prevent overfilling and ensures system reliability. Regular monitoring of fluid levels, temperatures and pressures optimizes operation.
A properly designed thermal expansion tank leads to lower maintenance and better performance. For more insights, connect with Eastman technical experts who can tailor solutions to your system’s needs.
