Method and procedure for retrofitting of large-scale heat exchanger networks within industrial plants and Total Sites was developed that considers trade-offs between investment and operating costs. A certain number of most optimal retrofitting modifications could now be proposed / obtained.
COBISS.SI-ID: 19101974
This contribution presents a multi-objective Mixed-Integer Linear Programming (MILP) synthesis of a dynamic supply-network under uncertainty applied to food industry. The previously-developed multi-objective model for achieving energy self-sufficiency by integrating renewables into companies` supply-networks has now been extended to account for the dynamic consideration of variable supply and demand over the year, for uncertainties related to products% demand and sun radiation, and for multi-objective optimisation, in order to obtain the most sustainable company`s supply-network. The sustainable synthesis of a company`s network is performed regarding the integration of renewables such as biomass and other wastes, and solar energy. The obtained solutions are those reflecting maximal profit, reflecting constantly-changing dynamic market conditions, accounting for several uncertain parameters, and protecting the environment.
COBISS.SI-ID: 17775126
In this work, AISI C1018 lower grade steel material was examined in 20 wt.% methanesulphonic acid (MSA) solutions containing different chemicals to design corrosion inhibitor formulations. These formulations were based on acetylenic alcohol, cinnamaldehyde, 1 dodecylpyridinium chloride, and methanol. It was shown that AISI C1018 steel has to be inhibited in MSA solution and that it is crucial to find the right combination of chemicals to design effective corrosion inhibitor formulations. Electrochemical analyses were carried out in order to test these systems. It was shown that acetylenic alcohol-based formulations significantly improve corrosion inhibition effectiveness compared with the individual corrosion inhibitor components used separately and that they mainly work as mixed-type inhibitors.
COBISS.SI-ID: 18831638
Adhesives based on renewable resources have inferior efficiency compared to the synthetic ones. To improve the adhesive properties of soy protein isolate (SPI) adhesives, a new method of thermally modifying SPI was developed. The commercial SPI powder was thermally modified in a vacuum chamber at different temperatures (50, 100, 150, and 200 C).The combination of thermal modification at 50 C, dispersion preparation at 50 C, and pH increase resulted in an adhesive with the highest shear strength.
COBISS.SI-ID: 1536965572
This methodology combines several heuristic methods which progressively lead to a flexible HEN design at a specific level of confidence. A significantly reduced multi-scenario model for flexible HEN design is formulated at the nominal point with the flexibility constraints at the critical points. The optimal design obtained is tested by stochastic Monte Carlo optimization and the flexibility index through solving one-scenario problems within a loop. This presented methodology is novel regarding the enormous reduction of scenarios in HEN design problems, and computational effort. Despite several simplifications, the capability of designing flexible HENs with large numbers of uncertain parameters, which are typical throughout industry, is not compromised. An illustrative case study is presented for flexible HEN synthesis comprising 42 uncertain parameters.
COBISS.SI-ID: 18589462