Demand-response operation of air separation units often involves frequent changes in process setpoints (e.g., production rate), and therefore dynamics should be considered scheduling calculations to ensure feasibility. To this end, scale-bridging models (SBMs) approximate the scheduling-relevant a closed-loop low-order representation. In contrast previous works that have employed nonlinear SBMs...

The strong increase of the contribution of renewable sources (wind, solar) to the power generation portfolio has increased uncertainty in the operation of the grid and has motivated efforts in demand-side management. Of particular interest is the demand response (DR) operation of large industrial electricity consumers, which is encouraged via (real-)time-varying electricity pricing schemes. For...

–In the present work two popular methods for modelling a system are compared using modelling of Air Separation Unit (ASU). To Model any MIMO system in general both ARMA and Subspace Identification methods can be used, and the optimum results can be achieved only after thorough investigation in the actual process of the system and the methodology by which the modelling can be done so as to suit ...

A novel framework for making plant scheduling decisions while considering the plant process dynamics is presented in this thesis. A model of an air separation unit built to supply nitrogen gas and subject to time-varying electricity prices was used to illustrate this framework. The model includes a cryogenic distillation column with an integrated reboiler/condenser, a multi-stream heat exchange...

This paper presents the techno-economic assessment of CO2 Purification Unit (CPU) included in cement plants based on capture via oxy-fuel calcination. Two configurations, targeting two different outlet specifications (‘moderate’ and ‘high’ purity), have been optimized order to minimize increase clinker production cost due this process unit. Air infiltration rate is parameter with highest impact...

Integrated Gasification Combined Cycle power generation technology is recognized as one of the important future development directions clean generation. Taking a large-scale IGCC plant research object, operating strategy single unit tripping in multi-units was discussed this paper. and air separation shall ramp down balance with various gas demand 1–2 minutes after one-unit trips. Duct burners ...