Heat Pump🔗
Base🔗
This experiment illustrates how the HeatPump model can be easily configured to run a steady-state simulation with the Physics-based Solving capability of Modelon Impact.
Fixed Sub Cool🔗
This experiment illustrates how to indirectly fix the charge for the HeatPump system while running a steady-state simulation with the Physics-based Solving capability of Modelon Impact.
Evaporator Sizing🔗
This experiment demonstrates the sizing functionality with the TwoPhase-Liquid heat exchanger, using the Physics-based Solving capability of Modelon Impact.
Condenser Sizing🔗
This experiment demonstrates the sizing functionality with the TwoPhase-Liquid heat exchanger, using the Physics-based Solving capability of Modelon Impact.
Introduction🔗
This is a step-by-step tutorial to learn how to build transient models of complex thermodynamic systems in Modelon Impact. We will model a closed Brayton cycle mainly using components from the Vapor Cycle library but the instructions are generic and can be applied to successfully build any type of thermodynamic system. The tutorial will teach you how to break down the system modeling process into smaller steps to succeed in the overall task.
Plant Information🔗
The system to be built is a Brayton cycle with supercritical CO2 (sCO2) as the working fluid. A Brayton cycle is a thermodynamic cycle that describes the operation of a gas turbine. It exists in different variants and we will focus on a simple & closed Brayton cycle, i.e. that recirculates the working fluid. There is no phase change for the working fluid, it stays in the supercritical region.
Step 1: Create a package structure🔗
A package structure needs to be created to store all models & experiments. Create a package
Let’s call the top-package BraytonCycle and create three sub-packages therein:
- Component
- TestBench
- Experiment
Image
Step 2: Component parameterization using available data🔗
The Component package is meant to contain parameterized library models representing specific supplier components. Once they have been parameterized and eventually named according to some supplier catalog, they will be used as is in the system model or the test benches.
Step 3: Create test bench models🔗
Before assembling the complete system model, subsets of the plant will be isolated and simulated using boundary conditions defined by the nominal data.
Step 4: Build the complete Brayton cycle power plant🔗
To have a complete Brayton cycle, the sources and sinks in the test bench OpenLoop are removed, the outlet of “Friction1” is connected to the inlet of “GT”, and the outlet of “Friction2” is connected to the inlet of “CPR”. Simple PI controllers have been added to control the heater/cooler and maintain the working fluid temperatures at their target values.