Follow-On Status Report on FY2022 Model Development within the Integrated Energy Systems Hybrid Repository

Abstract

This publication details newly created energy storage and reactor models developed within the HYBRID modeling repository as part of the Department of Energy Office of Nuclear Energy's (DOE-NE) Integrated Energy Systems (IES) program, led by Idaho National Laboratory (INL).Recently, model development has included the creation of three dynamic systems-level models in the IES-based HYBRID repository: a pebble bed high temperature gas reactor (HTGR), compressed air energy storage (CAES), and Modelica-Standard-Library-based two-tank sensible heat storage (SHS). The models are developed using the latest publicly available data and they incorporate the possibility of control strategy inclusion for use with the existing IES modeling, analysis, and optimization toolset. Simulations have showcased the abilities of each technology to flexibly operate in ways consistent the expectations for IES operation.Once these models are made available, they can be utilized within different integrated energy park concepts in order to understand optimal system operation, control, and dispatching. Moreover, given the generic nature of the models, industrial partner technologies can be quickly added to the repository by using the existing models as a basis. Additional dynamic models for thermal energy storage concepts can be developed and added to the HYBRID repository as needed.v

Engineering-Scale Integrated Energy System Data Projection Demonstration via the Dynamic Energy Transport and Integration Laboratory

“…Compared to the proton-exchange membrane and high-temperature thermochemical processes, SOECs are net zero carbon (if carbon dioxide is added to the cathode inlet, electrolysis of carbon dioxide is possible, making SOEC net-negative carbon) and are highly efficient due to minimal applied stack voltage. The major components are (1) the steam supply; (2) air, hydrogen, and water supplies; (3) a furnace stack; (4) an air compressor; (5) a condenser; and (6) a hydrogen recycler [17]. The hydrogen recycler process retrieves 10% of the produced hydrogen to prevent the oxidation of furnace-stack components and is initiated when the SOEC is ongoing.…”

“…Using the known variables from Equations ( 14), (17), and ( 18), the intermediate nondimensionalized form of Equation ( 55) is:…”

“…Because the maintenance of TEDS and HTSE is ongoing, the Modelica-language-based system-modeling tool Dymola [30], a tool for the modeling and simulation of integrated and complex systems, is used to generate data. The Modelica models for TEDS and HTSE are developed from previous INL IES efforts, shown in Section 10.1, and can be found in [17,31]. The simulation results shown in Section 10.2 are the generated simulation data and are based on model runnability.…”

“…For the scaled-case nitrogen mole-flow rate, oxygen mole-flow rate, and calculated current, it was revealed by the Dymola model code that the physics were being calculated differently from the equation set used in Section 7. The modeled current density and stack power are [17]:…”