IIR document
Comparison of constant and variable discharge flow and force coefficients for reciprocating compressor.
Author(s) : PASHAK P., KARABAY A. Y., SAHIN C., MALIK A. N., LAZOGLU I.
Type of article: IJR article
Summary
Enhancing the mathematical models always have been a critical issue in every field, and the reciprocating compressors are not exceptional. Flow and force coefficients are two empirical factors that help to calculate the mass flow rate through the valve and gas force, respectively. These coefficients can be considered constant values or valve lift dependent. However, in the discharge process, the piston is close to the top dead center, which may affect the discharge flow field and, subsequently, the coefficients.
These coefficients should be determined by experiments or numerical simulations such as computational fluid dynamics (CFD). Experiments are expensive, and the exact geometry may not always be available to perform the CFD analysis. Also, CFD analysis for various valve lifts and piston positions is computationally expensive.
This study studied the effect of constant, single variable (valve lift dependent) and double variable (valve lift and piston position dependent) coefficients on compressor performance and discharge valve movement in three operating conditions. A mathematical model was developed for this purpose, and a 3-D CFD simulation was used to compute the coefficients. To validate the results, a strain gauge and a calorimeter were used as measurement tools.
The single and double variable models captured the valve behavior, and pressure picks better than the constant model. However, the constant model estimated the indicated power, cooling capacity, and COP with good accuracy. In predicting the discharge losses, the double variable model was the most reliable among the others.
Available documents
Format PDF
Pages: 370-384
Available
Public price
20 €
Member price*
Free
* Best rate depending on membership category (see the detailed benefits of individual and corporate memberships).
Details
- Original title: Comparison of constant and variable discharge flow and force coefficients for reciprocating compressor.
- Record ID : 30031912
- Languages: English
- Subject: Technology
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 151
- Publication date: 2023/07
- DOI: http://dx.doi.org/10.1016/j.ijrefrig.2023.02.019
Links
See other articles in this issue (33)
See the source
Indexing
- Themes: Compressors
- Keywords: Reciprocating compressor; Valve (compressor); Piston; Modelling; Discharge; Flow
-
Effect of the piston position on the effective ...
- Author(s) : SILVEIRA J. V. T., ENGEL R. C., DINIZ M. C., et al.
- Date : 2017/09/06
- Languages : English
- Source: Compressors 2017: 9th International Conference on Compressors and Coolants.
- Formats : PDF
View record
-
A theoretical account of the piston influence o...
- Author(s) : PEREIRA E. L. L., DESCHAMPS C. J.
- Date : 2010/07/12
- Languages : English
- Source: 2010 Purdue Conferences. 20th International Compressor Engineering Conference at Purdue.
- Formats : PDF
View record
-
Surface of flow and force effective areas appli...
- Author(s) : MURAKAMI E. H., LINK R., LAJUS F. Jr
- Date : 2010/07/12
- Languages : English
- Source: 2010 Purdue Conferences. 20th International Compressor Engineering Conference at Purdue.
- Formats : PDF
View record
-
Dynamic analysis of the discharge valve of the ...
- Author(s) : HUANG B., XIE F.
- Date : 2008/07/14
- Languages : English
- Source: 2008 Purdue Conferences. 19th International Compressor Engineering Conference at Purdue & 12th International Refrigeration and Air-Conditioning Conference at Purdue [CD-ROM].
- Formats : PDF
View record
-
The design optimization and experimental behavi...
- Author(s) : SA B. D., KIM K. H., SON S. H., et al.
- Date : 1992/07/14
- Languages : English
View record