Real-Time Simulation of Vapour Compression Cycles

Abstract

This paper shows a tool chain of a set of ready-touse tools and libraries that enables the dynamic real-time simulation of vapour compression cycles. A new approach for calculation of fluid properties and numeric efficient component models are applied. As an Hardware in the Loop application a vapour compression cycle is exported to Scale -RT [5] using SimulationX [11] and connected to a hardware PI-Controller in order to realize a superheating control.

Real-Time Simulation of an Aircraft Electric Driven Environmental Control System for Virtual Testing Purposes

“…The provided example of an EVCP successfully demonstrates that hard real-time simulation of even complex thermofluid systems becomes a fairly well achievable task with Modelica. The example contains almost all what is typically regarded as challenging: vapor cycles (see also Schulze, 2011), complex heatexchanger models, bypasses, compressors, turbines and complex boundary conditions. Also it handles 3 different kinds of media: moist air, water, and a refrigerant.…”

Simulative Potential Analysis of Combined Waste Heat Refrigeration using Ammonia in an Intercity Bus on dynamic route

“…In the following, the investigated topology and its implementation into the omnibus as well as the simulation statistics of the corresponding models are described. All models have been created using the TIL and TIL Media library (Richter, 2008;Gräber et al, 2010;Schulze et al, 2011) in Modelica. In terms of the TIL library a highly dynamic modelling approach has been used.…”

Transient evaluation of a city bus air conditioning system with R-445A as drop-in – From the molecules to the system

“…The air conditioning system of a city bus is modelled using the Modelica Library TIL [18], which can be used for system simulations of thermodynamic cycles. It is evaluated on a given driving cycle for city busses [19] operating with R-134a, and then compared to a system operating with R-445A as drop-in.…”