by jasper » 25 October 2017, 07:57
The issue with switching to heat balance mode is fixed - thank you for reporting that. The fix is available via CUP.
In isothermal mode, the heat duty is not actually calculated, hence the value of 0 remains. I could hide this value altogether in isothermal mode, but if I were to populate it, it would be one of the following values:
(A) the difference between product and feed enthalpy; this value is available if you double click the unit and go to the balance page.
(B) the difference between product and feed enthalpyF; this value is also available if you double click the unit and go to the balance page. This value would account for the 'heat of reaction' by taking into account the heat of formation
(C) the integral of heat of reaction of the length of the reactor. Heat of reaction as taken from the reaction source may not be available, and if it is available, it is not used in this mode.
The value you are looking for is probably (B) as this would represent the amount of heat you would need to add/remove to keep the device at constant temperature. Would you agree?