.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