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

Abstract

The objective of this study is to demonstrate and validate the Dynamic Energy Transport and Integration Laboratory (DETAIL) preliminary scaling analysis using Modelica language system-code Dymola. The DETAIL preliminary scaling analysis includes a multisystem integral scaling package between thermal-storage and hydrogen-electrolysis systems. To construct the system of scaled equations, dynamical system scaling (DSS) was applied to all governing laws and closure relations associated with the selected integral system. The existing Dymola thermal-energy distribution system (TEDS) facility and high-temperature steam electrolysis (HTSE) facility models in the Idaho National Laboratory HYBRID repository were used to simulate a test case and a corresponding scaled case for integrated system HYBRID demonstration and validation. The DSS projected data based on the test-case simulations and determined scaling ratios were generated and compared with scaled case simulations. The preliminary scaling analysis performance was evaluated, and scaling distortions were investigated based on data magnitude, sequence, and similarity. The results indicated a necessity to change the normalization method for thermal storage generating optimal operating conditions of 261 kW power and mass flow rate of 6.42 kg/s and the possibility of reselecting governing laws for hydrogen electrolysis to improve scaling predictive properties. To enhance system-scaling similarity for TEDS and HTSE, the requirement for scaling validation via physical-facility demonstration was identified.

Scaling Outlooks on Integrated Energy Systems

“…The following sections supplement details of the data projection study. For further details beyond this report, review Reference [13].…”

“…But because maintenance is ongoing currently at TEDS and HTSE, Dymola was used for the modeling and simulation of integrated and complex systems to generate the needed data. The TEDS and HTSE Modelica models were developed from previous INL IES efforts and can be found in References [13,15]. The simulation results shown in Section 3.5 are the generated simulation data.…”

“…As described in Section 4.2, the objectives for the assessment base is to size heat storage tanks when considering one or more tanks on each hot and cold side while conserving the total amount of energy storage at the target storage time (e.g., four hours of heat storage). For the IHX and intermediate piping, the same conservation laws and governing equations in Table 2 were used and the derivation can be found in [13]. For the conservation laws specific to heat storage tanks introduced in Sections 4.2.2.1, 4.2.2.2, and 4.2.2.3, the resulting scaled equation is in Table 7.…”

“…Scaled subsystem processes for the TEDS and HTSE facilities. Nomenclature can be found in[13]. 𝐻 2 𝑛 𝑐 𝐼𝜋 𝑐𝑎 𝑃 𝐻 2 ,𝑖𝑛 𝑇 𝑜𝑢𝑡,0 𝑇 ̅ 0 𝐶 𝑃,𝑆𝑂𝐸𝐶 𝑃 𝐻 2 0,𝑖𝑛 ]…”