Considerations on Calculations that do not converge
Considerations on Calculations that do not converge
In the calculation of heat exchangers, although there are rules of general trends related to the construction of the heat exchanger configuration and thermophysical properties, it is necessary to analyze each situation individually.
In the particular case of heat exchangers with phase change (direct expansion, condensation and pump evaporator), the program COILS makes a correction of the benefits related to pressure drops of the refrigerant.
Thus, an iterative calculation can, in some situations, prevent the process of convergence of calculations due to this amendment.
The only way to remedy this situation is to change the number of circuits of the coil set in the calculation window.