This model contains a calculation procedure for the isentropic
  efficiency presented by Engelpracht (2017). However, this approach is
  just fitted to various experimental data obtained by a literature
  review and, therefore, to use with caution.
| Reference | Formula | Refrigerants | Validity ncompressor | Validity Πpressure | 
|---|---|---|---|---|
| Engelpracht2017 | ηise = a1 + a2*n + a3*n^3 + a5*π^2 | Generic model | 0 - 120 | 1 - 10 | 
Engelpracht, Mirko (2017): Development of modular and scalable simulation models for heat pumps and chillers considering various refrigerants. Master Thesis