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This document covers the contents of the ASTEP deliverables ‘D3.3 - Design of the daily and yearly operation for AMTP and MAND’ and ‘D5.1 - Report on the integrated ASTEP model development and Conceptual Designs’. First, the ASTEP concept design is described for the two end-users of the project, the dairy industry Mandrekas in Corinth (Greece) and the ArcelorMittal Tubular Products factory of Iasi (Romania). In a first stage, two different layouts are proposed, one with the Sundial and the thermal energy storage system in series and the other with the Sundial and the thermal energy storage in parallel. Then, a control strategy is outlined with the objective of maximising the solar energy integration into the processes and minimising the hysteresis in the thermal energy storage system. The different operation modes of the system and the sensors and actuators are selected for that. Once the layout, the operation modes and the control strategy are defined, two simulation models are developed, namely a steady-state one and a dynamic one. Afterwards, the steady-state simulation model is used to assess the whole system making different analyses. First, the daily and yearly behaviour of the two proposed designs (one for each end-user) is analysed. To complete these reference cases, some sensitivity analyses and a comparison of the selected configuration to the alternative one (storage in parallel) is performed, showing that the selected design is feasible. After that, the concept is analysed considering different thermal loads at the industry side, both for the heating and cooling demands, and also varying the number of accumulators inside the thermal energy storage system. Finally, the steady-state simulator is used to analyse the ASTEP concept at different working temperatures and in different sites to provide information about its possible performance within industries different from the end-user cases. The dynamic model finally is used to analyse the response of the control system in the different transients conditions during some representative days, and also to assess the defined operation modes. The analysis is done for the designs selected for the two end-user. |
