.AixLib.Fluid.Movers.Compressors.Utilities.IsentropicEfficiency.PolynomialIsentropicEfficiency .AixLib.Fluid.Movers.Compressors.Utilities.IsentropicEfficiency.PolynomialIsentropicEfficiencyThis model contains a calculation procedure for isentropic efficiency models (for more information, please check out AixLib.Fluid.Movers.Compressors.BaseClasses.PartialCompression). The calculation procedures based on a polynomial approach are presented below.
Actually, three polynomial approaches are implemented in this
package. To add further calculation procedures, just add its name
in AixLib.Fluid.Movers.Compressors.Utilities.Types
and expand the if-structure.
| Reference | Formula | Refrigerants | Validity ncompressor |
Validity Πpressure |
|---|---|---|---|---|
| DarrAndCrawford1992 | ηise = a1 + a2*n +
a3/ρinlet |
R134a | 40 - 75 |
3 - 10 |
| Karlsson2007 | ηise = a1 + a2*π + a3*π^2 + a4*n +
a5*n^2 |
R407c | No information |
No information |
| Engelpracht2017 | ηise = a1 + a2*n + a3*n^3 + a5*π^2 |
Generic model | 0 - 120 |
1 - 10 |
J.H. Darr and R.R. Crawford (1992): Modeling of an Automotive Air Conditioning Compressor Based on Experimental Data: ACRC Technical Report 14. Publisher: Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign.
F. Karlsson (2007): Capacity Control of Residential Heat Pump Heating Systems. In: PhD thesis
M. Engelpracht (2017): Development of modular and scalable simulation models for heat pumps and chillers considering various refrigerants. Master Thesis