| 摘要 |
<p>The present invention concerns a method for optimisation of the production of entropy in one or more chemical reactors, where a first number of in-feeded reagents are transformed to another number of out-feeded products, and where a yield of a distinct of the out-feeded products is set up as a predetermined value (J), and a total heat Q is transferred to or from the reactor, wherein the degree of reaction X0, for reactants and intermediate products, pressure p0 and temperature, T0, or marginal conditions are known; reference profiles (reaction profile, X(x), pressure profile p(x), and temperature profile T(x) are calculated by solving conservation equations for mass, moment and energy with given marginal conditions; the first optimal set of profiles for reaction, pressure and temperature is calculated starting from the reference profiles, by Euler-Lagrange optimisation of the entropy production for the reaction(s) with Lagrange multiplier μ1 to take care of the requirement for constant production J; the second optimal set of profiles for reaction, pressure and temperature is calculated starting from the reference profiles, by Euler-Lagrange optimisation of the entropy production for the heat exchanger(s), with Lagrange multiplier μ2 to take care of the requirement of given transferred heat Q; the minimum entropy production for the total system is determined by balancing the two ideal set of profiles and reference profiles against each other according to the procedure described in own flow sheet, so that a final set of profiles is provided; the reactor is operated with the marginal conditions provided by the final set of profiles, or a set of profiles as close to this as practically possible.</p> |
