Refrigerants R134a and R410a for modular heat pumps

Created by: MirkoEngelpracht

What is the problem?

This issue is a work package for issue #407 (closed). Currently, there are no refrigerants within the AixLib library. Therefore, we want to add two different refrigerants (R134a and probably R410a).

Why do we want to solve it?

We want to solve this for issue #407 (closed): The refrigerants can be used, for example, for heat pumps and refrigerating machines.

How do we want to solve it?

We will use the approach presented by Sangi et al. (see paper “A Medium Model for the Refrigerant Propane for Fast and Accurate Dynamic Simulations”; http://www.ebc.eonerc.rwth-aachen.de/go/id/dncb/file/227214). Sangi et al. calculated functions for the density, specific enthalpy and specific entropy for the three different regimes supercooled, superheated and two-phase. These functions were polynomial and fitted to the inverse energy equation of state.

Who do we think will benefit from our solution?

We think that everyone will benefit from the models who needs refrigerants without using external media libraries. Moreover, the presented approach allows a fast and accurate simulation and, therefore, contributes to everyone who will focus the simulation speed.