I tried using Aspen Plus/Properties to extract the thermal and transport properties of a molten salt mixture (KCl-0.67+MgCl2-0.33 mole fraction) for 450oC to 900oC where the fluid is in the liquid phase. The predicted results from Aspen using different EoS (ELECNRTL, ENRTL-RK, SYSOP0, VANL-2, VANL-HOC, VANL-NTH, VANL-RK, Peng-Robinson, PR-BM etc.) were too far from the literature values for density, viscosity, thermal conductivity and heat capacity at constant pressure. Example: density of the salt mixture while defining the salts as conventional fluids were in the range of 450-850kg/m3 as opposed to 1650kg/m3 per the literature @450oC (Please find the attachment) . Whereas selecting the components as solid gives the density of about 4000kg/m3.
Do I need to specify any binary interaction manually to get the properties right?
Please advice on this.
Thank you.
Dear Sir. Concerning your issue about the Molten Salt Thermo-physical properties in Aspen Plus. The attached chapter covers the main thermophysical properties for (i) primary coolant salts (AHTR) (Table A1; source Williams et al. (2006) [8]), (ii) heat transfer coolant salts (loop to H2 plant) (Table A2; source Williams (2006) [17]), and (iii) fuel-salt coolants (MSRs) (Tables A3(a), A3(b), 4; various noted sources). The data tables presented in the appendix (Tables A1, A2, A3(a), A3(b), A4), are to be used in parallel with this chapter, since the following text is structured to refer/comment on this data. I think the following below chapter link may help you in your analysis:
https://www.iaea.org/INPRO/CPs/COOL/2nd_Meeting/Literature_Summary-IAEA.pdf
Thanks
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