A Semi-Empirical Method for Modeling Reciprocating Compressors in Residential Refrigerators and Freezers
File(s)
Date
1999Author
Jaehnig, Dagmar
Publisher
University of Wisconsin-Madison
Metadata
Show full item recordAbstract
Calorimeter testing data for domestic refrigerator/freezer compressors have been
collected. The current method to represent compressor performance data recommended
by the Air-Conditioning and Refrigeration Institute (ARI) has been applied to all
experimental data. It has been found that the model does not reliably interpolate and
extrapolate.
A semi-empirical model to represent compressor performance has been
developed. The model is based on the concept of volumetric efficiency and assumes a
polytropic compression process. The model contains 5 curve fit parameters that have to
be determined with non-linear regression. A minimum of 4 measurements of mass flow
rate and electrical power are necessary to generate accurate compressor maps with this
model. The model has been shown to extrapolate within 5% error to 10�C higher and
lower condensing and evaporating temperatures than represented in the measured data.
The effect of a change in ambient temperature has been compared with data
available in the literature and seems well represented in the model as a change in the
suction temperature.
Subject
Thesis (M.S.)--University of Wisconsin--Madison, 1999.
Dissertations Academic Mechanical Engineering.
University of Wisconsin--Madison. College of Engineering.
Permanent Link
http://digital.library.wisc.edu/1793/7683Description
Under the supervision of Professors Sanford Klein and Douglas Reindl; 289pp.
Citation
Jaehnig, D. (1999). A Semi-Empirical Method for Modeling Reciprocating Compressors in Residential Refrigerators and Freezers. Master's Thesis, University of Wisconsin-Madison.