Concentric tube heat exchanger - Required length
Concentric Tube (or Pipe) Heat Exchangers are used in a variety of industries for purposes such as material processing, food preparation, and air-conditioning. They create a temperature driving force by passing fluid streams of different temperatures parallel to each other, separated by a physical boundary in the form of a pipe. This induces forced convection, transferring heat to/from the product.
The length of heat exchanger required can then be expressed as a function of the rate of heat transfer as on the shown formula
The Logarithmic Mean Temperature Difference (ΔT) can be calculated from this formulaRelated formulas
|surface area available for heat transfer (m2)
|rate of heat transfer (W)
|Overall Heat Transfer coefficient (W/(m2*K))
|Logarithmic Mean Temperature Difference (K)