COILS is a tool for the design and rating of finned pack heat exchangers in the following calculation modalities:

  • Heating and Cooling of the air without any change of phase of the liquid, gas or refrigerant in the tubes
  • Condensing and Direct Expansion of refrigerants with change of phase
  • Steam
  • Pump evaporators with R717

Compressors and axial fans

In the Professional edition, COILS has an extensible archives of usable axial fans and compressors in the Condensing and Direct Expansion calculation options. In this way it's very easy to carry out the design of remote condensers and unit coolers.

Geometries

COILS has an extensible archive with more than 50 geometries, the most used in the air conditioning and refrigeration industry.

It's possible to insert a new geometry with the following characteristics:

  • Staggered and aligned tube
  • Spiroidal or integral fins
  • Tubes with different types of corrugation
  • Fins with different types of corrugation

Moreover, changing the correction factors of the geometry it's possible to obtain calculation results adherent to the experimental data gained from a laboratory of measures.

UNILAB is the only software house in Europe able to help an heat exchangers manufacturer in the obtaining of the Eurovent certification for water coils with the aid of our software (HECOILS norm EN 1216 - see the Eurovent website for more information). The adjustment of the correction factors has allowed a maximum deviation of the values calculates from the experimental data of 5% for the thermal power and of 10% for the pressure drop air side and tubes side, for the same geometry in different configurations and multiple conditions.  

Calculation modalities

  • In the Verify modality the user can rate the power and the pressure drops knowing all the geometrical parameters of the exchanger and the working conditions changing one or more input variables at the same time (for example: geometry, inlet  air temperature and humidity, fluid, fin thickness, fin type, tube type, fluid temperatures etc.)
  • In the Design modality it is possible to insert the working conditions and the power required without knowing all the geometrical parameters, obtaining a list of exchangers compatible with the initial conditions imposed