How are coil-type heat exchangers designed, calculated, and simulated in ASPEN?
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I have some questions regarding heat exchanger design, calculation, and simulation that I would like to ask the experts here. I would like to use ASPEN to simulate coiled or spiral coil heat exchangers, with the aim of obtaining the heat transfer area of these exchangers. The refrigerant flows inside the tubes (under forced convection conditions), while wet air or water flows outside the tubes (under forced or natural convection conditions). However, during the use of ASPEN, it was found that the heat transfer coefficients and heat transfer areas obtained using the DESIGN mode of the HEATX module differed significantly from the actual values. The RATING and SIMULATION modes did not provide any options for designing coil-type heat exchangers; when designing shell-and-tube heat exchangers, only forced convection could be used for both the inside and outside of the tubes, with no option for natural convection. In this case, should I calculate the heat transfer coefficient manually and enter a fixed value for it in HEATX to determine the heat transfer area?
I took a look at the previous forum posts. Can this situation of forced convection inside the tube with almost no flow outside the tube, resembling natural convection, be approximated using a shell-and-tube heat exchanger? I’d like to ask the fellow sailors: is it really like this?
Spiral coiled tube heat exchangers can be simulated using HYSYS
Is there an Excel calculation table?:)