Chris Higman

This is clearly an inmportant topic (see also "Calculate fuel combustion" in the Open Discussion). There is no easy way at present to maintain both the exact chemistry and the correct heat balance for a fuel with undefined structure. Using a compound which is close but not exactly similar in chemical composition is not really satisfactory. I have my own VB Gibbs reactor which handles an input of proximate/ultimate analysis and heat of combustion. Typically I would enter the ultimate analysis of the...

Dear Daniel, many thanks for the suggestion. I have tried to put a Pittsburgh #8 coal in using Joback, but the results are exotic to say the least. The ultimate analysis (in wt%) of the dry, ash-free coal is C - 84.218, H – 5,592, O - 6.162, S – 2.431, N – 1.598. In my own model I assign an arbitrary molecular weight of 100 kg/kmol, so the chemical formula results in C7.018H5.592O0.385S0.076N0.114. But Joback does not accept fractions, so to obtain the correct ratios between the elements, I must...

I am new to DWSIM (about three weeks) and must congratulate Daniel and others on this product. I have already been able to model a steam reformer (process and furnace sides), which is an indication of how easy it is to use. With that much already, it is only a day or two till I have a complete hydrogen plant. There is one thing that I find missing, and that is creating a fuel component (coal, heavy oil or biomass). This is a limitation for my work and reading the discussions, I am clearly not the...

Using the translation window did not work for me. But I copied it into Excel and made some proposed changes there. See attached list. I will add a few more later as I come accross them. Some other amusing mistranslations: "Kopfball" (as in football) for header. "Satzball" (as in tennis) for set point.