Hy4GreenIT = Hydrogen for Green IT
Simulation model of a hydrogen-based Green IT facility.
In short, the goal of this work has two phases:
First phase:
- To establish a simulation to better predict under which situation is how much computing resource with how many renewable energies possible.
Second phase:
- To connect optimization frameworks with Modelica models.
Zizhe Wang,
Software Technology Group,
Faculty of Computer Science, TU Dresden
Dymola > 2021
- Dymola, Dynamic Modeling Laboratory, is a complete tool for modeling and simulation of integrated and complex systems for use within automotive, aerospace, robotics, process and other applications.
TransiEnt Library > 2.0.0
- The TransiEnt library is written in the Modelica modeling language and allows simulations of integrated energy networks with high share of renewable energies.
Clara Library ≥ 1.8.0
- Modelica library for simulation of Clausius-Rankine (ClaRa) cycles in power plants
TILMedia Library ≥ 1.8.0
- Modelica library with thermophysical properties of fluids and solids (Used for ClaRa library)
This model has been tested in following environments:
Dymola = 2023 TransiEnt = 2.0.2 Clara = 1.8.0 TILMedia ClaRa = 1.8.0
- Load
package.mofile - The package Hy4GreenIT will be loaded with two files, the file
Hy4GreenITis the simulation model, another one is the modified adapter
-
Solar Panel
-
Electrolysis + Hydrogen Tank
-
Adapter
-
Fuel Cell Stack
-
Consumer (IT Container)
This sub-component uses this component from the TransiEnt library:
TransiEnt.Producer.Electrical.Photovoltaics.PVProfiles.SolarProfileLoader
This component loads PV profiles from csv files.
The sub-component "Solar Panel" defines the value of electricity generated from solar energy, which uses:
- original data for 2015 (from 50HzNKZ, AmprionNKZ, TennetNKZ, TransnetNKZ) meassured every 15min, scaled by installed power (from BNAEEG).
This sub-component uses this component from the TransiEnt library:
TransiEnt.Producer.Gas.Electrolyzer.Systems.FeedInStation_Storage
This component represents a feed in station where hydrogen is produced with an electrolyzer, stored in an adiabatic storage and fed into a natural gas grid. The storage can by bypassed and the hydrogen is fed directly into the grid.
- Functions of ports
- upper port (
P_el_set):- Input for the set value for the electric power
- left port (
m_flow_feedIn):- Input for the possible feed-in mass flow into the natural grid etc
- right port (
epp):- Electric power port for the electrolyzer
- In this model: it defines the frequency of the grid
- bottom port (
gasPortOut): Outlet of the hydrogen- Output is defined as real gas with
h,p,xi,m_flowas parametersh: specific enthalpyp: pressurexi: mass fractionm_flow: mass flow rate
- Output is defined as real gas with
- upper port (
Adapter has been self-modified because the output of electrolyzer is real gas with 4 parameters (h, p, xi, m_flow) and input of fuel cell stack is ideal gas with 4 parameters (T, p, xi, m_flow). This is no adapter which can transfer real gas with h to ideal gas with T.
Details about this problem please see this Issue: Question/problem with gas types · Issue #7
A Pull Request has been created to cover this gap: feat add the adapter Real_ph_to_Ideal_pT.mo by wangzizhe · Pull Request #10 · TransiEnt-official
This sub-component uses this component from the TransiEnt library:
TransiEnt.Components.Electrical.FuelCellSystems.FuelCell.SOFC
This component models one SOFC-Cell Stack.
This component loads load profiles from csv files.
The sub-component "Consumer" defines the value of electricity which a consumer consumes, which uses:
- Original data for 2012 for a typical household in Hamburg, meassured every 15min
As of May 2023 this model works without errors. After simulation, the program shows the following messages.
Log-file of program ./dymosim
(generated: Mon Jun 19 14:40:55 2023)
dymosim started
... "Hy4GreenIT.Hy4GreenIT" simulating
... "dsin.txt" loading (dymosim input file)
... loading "default" from "C:/Program Files/Dymola 2023/Modelica/Library/TransiEnt 2.0.2/Tables/ambient/UndergroundTemperature_Duesseldorf_1m_2017.txt"
... loading "default" from "C:/Program Files/Dymola 2023/Modelica/Library/TransiEnt 2.0.2/Tables/electricity/ElectricityPrices_DayAhead_EPEX_Spot_2011.txt"
... loading "default" from "C:/Program Files/Dymola 2023/Modelica/Library/TransiEnt 2.0.2/Tables/electricity/REProfiles/Solar2015_Gesamt_900s.txt"
... loading "default" from "C:/Program Files/Dymola 2023/Modelica/Library/TransiEnt 2.0.2/Tables/electricity/ElectricityDemand_VDI4665_ExampleHousehold_RG1_HH_2012_900s.txt"
... "Hy4GreenIT.mat" creating (simulation result file)
Integration started at T = 0 using integration method DASSL
(DAE multi-step solver (dassl/dasslrt of Petzold modified by Dassault Systemes))
Integration terminated successfully at T = 86400
CPU-time for integration : 0.352 seconds
CPU-time for one grid interval : 0.704 milliseconds
CPU-time for initialization : 0.627 seconds
Number of result points : 704
Number of grid points : 501
Number of accepted steps : 2448
Number of f-evaluations (dynamics) : 4500
Number of crossing function evaluations : 3829
Number of Jacobian-evaluations : 1241
Number of model time events : 3
Number of input time events : 0
Number of state events : 98
Number of step events : 0
Minimum integration stepsize : 1.2e-06
Maximum integration stepsize : 1.75e+04
Maximum integration order : 4
Calling terminal section
... "dsfinal.txt" creating (final states)
SUCCESSFUL simulation of Hy4GreenIT.Hy4GreenIT- Fuel Cell Stack works not so realistic right now.
- The values of each component should be modified with more detailed and specific data.
- The model can be refined with different components, data, use cases
- The model can be connected to variable structure systems (VSS)
- it means different modus could be turned on/off under different situations.
- The model can be coupled with optimization frameworks