(29c) Integrating Energy Storage in Power Production: A Design and Scheduling Approach
AIChE Annual Meeting
Sunday, November 7, 2021 - 4:08pm to 4:27pm
In this work, the objective is to determine the optimal combination of wind and solar sources along with several energy storage technologies to be able to meet given power demand. The two most promising technologies to capture solar and wind have been considered: solar photovoltaic (PV) panels and wind turbines. To store energy, three different alternatives have been studied to integrate different storage horizons in the problem formulation: batteries, hydrogen, and methane. Batteries are suitable for a low capacity range but with a response time of the order of minutes. Hydrogen could be used for short/medium storage horizons due to the limited storage capacities and its high cost. Additionally, renewable methane can be used for long-term storage using the current natural gas infrastructure. Furthermore, biomass is a non-intermittent renewable source that can be used to provide a stable power production. Therefore, the integration of biomass with intermittent resources is also interesting in order to stabilize the power system. The effects of the integration of biomass into a wind/solar facility in order to provide stable power have been evaluated together with the storage alternatives proposed.
A scheduling approach has been employed to solve this problem. An hourly discretization of the time is necessary to capture the fluctuations in wind and solar resources and how to deal with them using the storage alternatives. The optimal capacities for the solar/wind capture units and the storage technologies (batteries, H2 production/consumption, CH4 production/consumption) are determined. The operation of the facility for a time horizon of one year is also calculated as well as the optimal capacities for these biomass processing facilities are determined considering the integration with wind and solar production.
The results closely depend on the weather conditions (wind and solar availability) and the biomass availability when biomass to power is introduced. Therefore, location is a key variable in the size and operation of these kind of integrated facilities. Therefore, a comparison of different sites in a country (Spain) has been presented, determining what are the variances between the design and operation of the facilities and proving a tool to determine what is the best location to set up this kind of facilities in the power grid of a given country. A social metric is also included in the comparison to deal with the problems of a fair energy transition. With this integration of technologies, a great step to reach a high rate of RES in the power system is get allowing it to meet the sustainability goals in the next years.
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