Methods based on a semi-empirical model for simulating scroll compressors with HFC and HFO refrigerants [version 3; peer review: 3 approved]
The aim of this work is to evaluate three methodologies regarding semi-empirical scroll compressor modeling for different refrigerants and conduct a comparative analysis of their results and accuracy. The first step is to improve a semi-empirical model for scroll compressors based on established tec...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
F1000 Research Ltd
2022-07-01
|
| Series: | Open Research Europe |
| Subjects: | |
| Online Access: | https://open-research-europe.ec.europa.eu/articles/1-148/v3 |
| _version_ | 1811309285423972352 |
|---|---|
| author | George Meramveliotakis Sotirios Karellas George Kosmadakis |
| author_facet | George Meramveliotakis Sotirios Karellas George Kosmadakis |
| author_sort | George Meramveliotakis |
| collection | DOAJ |
| description | The aim of this work is to evaluate three methodologies regarding semi-empirical scroll compressor modeling for different refrigerants and conduct a comparative analysis of their results and accuracy. The first step is to improve a semi-empirical model for scroll compressors based on established techniques, and further enhance the physical background of some of its sub-processes leading to more accurate predictions. Focus is then given on the compressor operation when changing the refrigerant, proposing three methods in total. The first method refers to the standard model, requiring an optimization process for the calibration of all the model parameters. The second method relies on a reference refrigerant, and also uses optimization procedures, but for the fine-tuning of a small subset of the parameters. The third method is more generalized, without the need of any optimization process for the parameters identification, when fluid change occurs, leading to a very fast approach. Το evaluate the accuracy and verify the applicability of each method also related to the necessary computational time, two scroll compressors each with three different refrigerants are considered (HFCs and HFOs and their blends). The model is evaluated with the available manufacturer data, using R134a as reference refrigerant. The results show that the first method predicts the key indicators with a very high accuracy, with the maximum discrepancy of 2.06%, 4.17% and 3.18 K for the mass flow rate, electric power and discharge temperature respectively. The accuracy of the other two methods is dropping, but within acceptable levels in most of the cases. Therefore, in cases that reduced accuracy can be accepted, the third method is preferred for compressor performance prediction when changing the refrigerant, which provides results at a small fraction of time compared with the other two methods, once the parameters are calibrated for a reference case. |
| first_indexed | 2024-04-13T09:39:35Z |
| format | Article |
| id | doaj.art-0ed5f677298f43999ee622912bd907a7 |
| institution | Directory Open Access Journal |
| issn | 2732-5121 |
| language | English |
| last_indexed | 2024-04-13T09:39:35Z |
| publishDate | 2022-07-01 |
| publisher | F1000 Research Ltd |
| record_format | Article |
| series | Open Research Europe |
| spelling | doaj.art-0ed5f677298f43999ee622912bd907a72022-12-22T02:51:59ZengF1000 Research LtdOpen Research Europe2732-51212022-07-01116145Methods based on a semi-empirical model for simulating scroll compressors with HFC and HFO refrigerants [version 3; peer review: 3 approved]George Meramveliotakis0Sotirios Karellas1George Kosmadakis2https://orcid.org/0000-0002-3671-8693Thermal Hydraulics and Multiphase Flow Laboratory, Institute of Nuclear & Radiology Sciences & Technology, Energy & Safety, National Center for Scientific Research Demokritos, Agia Paraskevi, 15341, GreeceLaboratory of Steam Boilers and Thermal Plants, School of Mechanical Engineering, National Technical University of Athens, Athens, 15780, GreeceThermal Hydraulics and Multiphase Flow Laboratory, Institute of Nuclear & Radiology Sciences & Technology, Energy & Safety, National Center for Scientific Research Demokritos, Agia Paraskevi, 15341, GreeceThe aim of this work is to evaluate three methodologies regarding semi-empirical scroll compressor modeling for different refrigerants and conduct a comparative analysis of their results and accuracy. The first step is to improve a semi-empirical model for scroll compressors based on established techniques, and further enhance the physical background of some of its sub-processes leading to more accurate predictions. Focus is then given on the compressor operation when changing the refrigerant, proposing three methods in total. The first method refers to the standard model, requiring an optimization process for the calibration of all the model parameters. The second method relies on a reference refrigerant, and also uses optimization procedures, but for the fine-tuning of a small subset of the parameters. The third method is more generalized, without the need of any optimization process for the parameters identification, when fluid change occurs, leading to a very fast approach. Το evaluate the accuracy and verify the applicability of each method also related to the necessary computational time, two scroll compressors each with three different refrigerants are considered (HFCs and HFOs and their blends). The model is evaluated with the available manufacturer data, using R134a as reference refrigerant. The results show that the first method predicts the key indicators with a very high accuracy, with the maximum discrepancy of 2.06%, 4.17% and 3.18 K for the mass flow rate, electric power and discharge temperature respectively. The accuracy of the other two methods is dropping, but within acceptable levels in most of the cases. Therefore, in cases that reduced accuracy can be accepted, the third method is preferred for compressor performance prediction when changing the refrigerant, which provides results at a small fraction of time compared with the other two methods, once the parameters are calibrated for a reference case.https://open-research-europe.ec.europa.eu/articles/1-148/v3scroll compressor refrigerants semi-empirical model heat transfer pressure drop leakageseng |
| spellingShingle | George Meramveliotakis Sotirios Karellas George Kosmadakis Methods based on a semi-empirical model for simulating scroll compressors with HFC and HFO refrigerants [version 3; peer review: 3 approved] Open Research Europe scroll compressor refrigerants semi-empirical model heat transfer pressure drop leakages eng |
| title | Methods based on a semi-empirical model for simulating scroll compressors with HFC and HFO refrigerants [version 3; peer review: 3 approved] |
| title_full | Methods based on a semi-empirical model for simulating scroll compressors with HFC and HFO refrigerants [version 3; peer review: 3 approved] |
| title_fullStr | Methods based on a semi-empirical model for simulating scroll compressors with HFC and HFO refrigerants [version 3; peer review: 3 approved] |
| title_full_unstemmed | Methods based on a semi-empirical model for simulating scroll compressors with HFC and HFO refrigerants [version 3; peer review: 3 approved] |
| title_short | Methods based on a semi-empirical model for simulating scroll compressors with HFC and HFO refrigerants [version 3; peer review: 3 approved] |
| title_sort | methods based on a semi empirical model for simulating scroll compressors with hfc and hfo refrigerants version 3 peer review 3 approved |
| topic | scroll compressor refrigerants semi-empirical model heat transfer pressure drop leakages eng |
| url | https://open-research-europe.ec.europa.eu/articles/1-148/v3 |
| work_keys_str_mv | AT georgemeramveliotakis methodsbasedonasemiempiricalmodelforsimulatingscrollcompressorswithhfcandhforefrigerantsversion3peerreview3approved AT sotirioskarellas methodsbasedonasemiempiricalmodelforsimulatingscrollcompressorswithhfcandhforefrigerantsversion3peerreview3approved AT georgekosmadakis methodsbasedonasemiempiricalmodelforsimulatingscrollcompressorswithhfcandhforefrigerantsversion3peerreview3approved |