为什么在模型中两项物性参数运行无误 而在一起调用refp​rop就会出现问题呢​(注释掉运行没有问题​，取消注释后出现it​eration did not converge，且调用物性模块出现Error in 'steam_sep​arator/汽水分​离器（一级疏水）/P​_DH' while evaluating expression.

Answer 1

[Himanshu]

Hey,

I understand that you are encountering an error when trying to call ‘REFPROP’, but your model runs well when you comment it out.

A “.dll” file, as well as several other MATLAB files, must be downloaded separately for the primary installation of ‘REFPROP’, please use the link below to see the installation instructions:

https://github.com/usnistgov/REFPROP-wrappers/tree/master/wrappers/MATLAB/legacy

Please click the hyper-linked files on this webpage to download these files and move them into your ‘REFPROP’ installation folder (C:/Program Files (x86)/REFPROP).

Once these files are in your folder, execute the following commands to determine if your installation is set up correctly:

>> refpropm('T','P',101.325,'Q',0,'WATER')

>> waterTables = twoPhaseFluidTables([25,4000],[0.01,15],25,25,60,'water','C:\Program Files\REFPROP\')

Hope this helps!