Application: Specifically crafted for use in coffee machines to filter ground coffee and ensure a smooth brewing process.

Expansion tanks are important to the operation of heat transfer systems. They are designed to account for the volumetric expansion of heat transfer fluids as a result of temperature increase. Expansion tanks also remove moisture, non-condensables, degradation by-products and entrained air during startup and operation.

Size an horizontal expansion tank for hot oil system using Relatherm HT-1 as Heat Transfer Fluid. The fluid is heated from 30 °C to 330 °C. System hot oil volume is 7.87 m³. Assume L/D to be used as 2.5. Thermal fluid density is 861.91 Kg/m³ at 30 °C and 752.17 Kg/m³ at 330 °C.

Vcold = Volume of the entire heat transfer (including piping, heat exchangers and cold fluid in expansion tank at start up)

Application: Specifically crafted for use in coffee machines to filter ground coffee and ensure a smooth brewing process.

A minimum volume (10% ~ 20%) is considered in expansion tank at start-up in cold conditions. As heating is started volume expands and tank sizing should be such that expanded volume fills (70% ~ 80%) of tank volume.

In this article, we present the sizing of an expansion tank using Relatherm HT-1, a high flash heat transfer fluid as an example.