RAMAB uses Aspentech HTFS, which is a world leading computer software for heat transfer. All of our staff who work with thermal calculations are experts within their particular area.

Based on process information and application, we develop the heat exchanger design which is optimal for your process.


This is what we need to know:

  • Temperature programme
    Input temperature and required final temperatures.
  • Flows
  • Pressure conditions
  • Any pressure drop-limitations
  • The physical qualities of the fluids
    In order to calculate requirements, we need to know the viscosity, specific gravity and heat along with the heat conductivity of the various fluids, preferably at different temperatures. Most of this information we can easily obtain from our own databank. Which fluid should be on the tube side or the mantle side, depends on several factors. Differences in viscosity and surface coefficients must also be taken into consideration along with corrosion, erosion and any possible pressure losses.
  • Physical dimensions
    How long/high should the heat exchanger be?  For fluids/fluid applications, the horizontal and vertical design is of less importance, but it is imperative to make the right choice when being used for evaporation and condensation purposes. Which design is most effective is dependent upon the task intended.


Sometimes a shell and tube exchanger is not the most optimal for your application. We can then suggest a plate heat exchanger or another type of heat exchanger from one of our partners.