Secop Capillary Tube Selection Software

Secop CapSel - Capillary Tube Selection Software

This software allows the user to calculate a capillary tube throttling device for a refrigeration system based on empirical formulas. The result is a start value for optimization, this start value typically giving a functioning system. In certain cases the best possible choice of capillary diameter and length might deviate remarkably from this calculated result.

The capillary sizing is based on the assumption, that 

• the suction line is connected to the capillary tube in most of its length for internal heat exchange
• no or little subcooling appears in continuous operation

The refrigerant used is to be chosen from a list. Input values should be representative dimensioning values for the refrigeration system.
The input value for

• capacity

is to be taken for the also to be input operating conditions, in terms of

• evaporating temperature
• condensing temperature
• return gas temperature and
• without subcooling

for the compressor type used, preferably. The input data are limited per refrigerant according to experience and compressor application areas.

Data like these could be according to data sheet performance data at ARI 540, EN 12900 or CECOMAF conditions, or other sources. The list of capillary tube inner diameters does contain typically available sizes from different countries.