Numerical Modeling of Ejector and Development of Improved Methods for the Design of Ejector-Assisted Refrigeration System
An ejector is a simple mechanical device that can be integrated with power generation or the refrigeration cycle to enhance their performance. Owing to the complex flow behavior in the ejector, the performance prediction of the ejector is done by numerical simulations. However, to evaluate the perfo...
| Main Authors: | , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2020-11-01
|
| Series: | Energies |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1073/13/21/5835 |
| _version_ | 1827702658647982080 |
|---|---|
| author | Hafiz Ali Muhammad Hafiz Muhammad Abdullah Zabdur Rehman Beomjoon Lee Young-Jin Baik Jongjae Cho Muhammad Imran Manzar Masud Mohsin Saleem Muhammad Shoaib Butt |
| author_facet | Hafiz Ali Muhammad Hafiz Muhammad Abdullah Zabdur Rehman Beomjoon Lee Young-Jin Baik Jongjae Cho Muhammad Imran Manzar Masud Mohsin Saleem Muhammad Shoaib Butt |
| author_sort | Hafiz Ali Muhammad |
| collection | DOAJ |
| description | An ejector is a simple mechanical device that can be integrated with power generation or the refrigeration cycle to enhance their performance. Owing to the complex flow behavior in the ejector, the performance prediction of the ejector is done by numerical simulations. However, to evaluate the performance of an ejector integrated power cycle or refrigeration cycle, the need for simpler and more reliable thermodynamic models to estimate the performance of the ejector persists. This research, therefore, aims at developing a single mathematical correlation that can predict the ejector performance with reasonable accuracy. The proposed correlation relates the entrainment ratio and the pressure rise across the ejector to the area ratio and the mass flow rate of the primary flow. R141b is selected as the ejector refrigerant, and the results obtained through the proposed correlation are validated through numerical solutions. The comparison between the analytical and numerical with experimental results provided an error of less than 8.4% and 4.29%, respectively. |
| first_indexed | 2024-03-10T15:00:23Z |
| format | Article |
| id | doaj.art-fcde5d6e464846efa4a879efdd478d8b |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T15:00:23Z |
| publishDate | 2020-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-fcde5d6e464846efa4a879efdd478d8b2023-11-20T20:14:47ZengMDPI AGEnergies1996-10732020-11-011321583510.3390/en13215835Numerical Modeling of Ejector and Development of Improved Methods for the Design of Ejector-Assisted Refrigeration SystemHafiz Ali Muhammad0Hafiz Muhammad Abdullah1Zabdur Rehman2Beomjoon Lee3Young-Jin Baik4Jongjae Cho5Muhammad Imran6Manzar Masud7Mohsin Saleem8Muhammad Shoaib Butt9Thermal Energy Systems Laboratory, Korea Institute of Energy Research, Daejeon 305-343, KoreaWah Engineering College, University of Wah, Wah Cantt, Punjab 47040, PakistanDepartment of Mechanical Engineering, Air University Islamabad, Aerospace and Aviation Campus Kamra, Kamra 43570, PakistanThermal Energy Systems Laboratory, Korea Institute of Energy Research, Daejeon 305-343, KoreaThermal Energy Systems Laboratory, Korea Institute of Energy Research, Daejeon 305-343, KoreaThermal Energy Systems Laboratory, Korea Institute of Energy Research, Daejeon 305-343, KoreaMechanical Engineering and Design, School of Engineering and Applied Sciences, Aston University, Birmingham B4 7ET, UKDepartment of Mechanical Engineering, Capital University of Science and Technology, Islamabad 44000, PakistanSchool of Chemical and Materials Engineering (SCME), National University of Sciences and Technology (NUST), Sector H-12, Islamabad 44000, PakistanSchool of Chemical and Materials Engineering (SCME), National University of Sciences and Technology (NUST), Sector H-12, Islamabad 44000, PakistanAn ejector is a simple mechanical device that can be integrated with power generation or the refrigeration cycle to enhance their performance. Owing to the complex flow behavior in the ejector, the performance prediction of the ejector is done by numerical simulations. However, to evaluate the performance of an ejector integrated power cycle or refrigeration cycle, the need for simpler and more reliable thermodynamic models to estimate the performance of the ejector persists. This research, therefore, aims at developing a single mathematical correlation that can predict the ejector performance with reasonable accuracy. The proposed correlation relates the entrainment ratio and the pressure rise across the ejector to the area ratio and the mass flow rate of the primary flow. R141b is selected as the ejector refrigerant, and the results obtained through the proposed correlation are validated through numerical solutions. The comparison between the analytical and numerical with experimental results provided an error of less than 8.4% and 4.29%, respectively.https://www.mdpi.com/1996-1073/13/21/5835ejectorsCFDempirical correlationrefrigeration cycle |
| spellingShingle | Hafiz Ali Muhammad Hafiz Muhammad Abdullah Zabdur Rehman Beomjoon Lee Young-Jin Baik Jongjae Cho Muhammad Imran Manzar Masud Mohsin Saleem Muhammad Shoaib Butt Numerical Modeling of Ejector and Development of Improved Methods for the Design of Ejector-Assisted Refrigeration System Energies ejectors CFD empirical correlation refrigeration cycle |
| title | Numerical Modeling of Ejector and Development of Improved Methods for the Design of Ejector-Assisted Refrigeration System |
| title_full | Numerical Modeling of Ejector and Development of Improved Methods for the Design of Ejector-Assisted Refrigeration System |
| title_fullStr | Numerical Modeling of Ejector and Development of Improved Methods for the Design of Ejector-Assisted Refrigeration System |
| title_full_unstemmed | Numerical Modeling of Ejector and Development of Improved Methods for the Design of Ejector-Assisted Refrigeration System |
| title_short | Numerical Modeling of Ejector and Development of Improved Methods for the Design of Ejector-Assisted Refrigeration System |
| title_sort | numerical modeling of ejector and development of improved methods for the design of ejector assisted refrigeration system |
| topic | ejectors CFD empirical correlation refrigeration cycle |
| url | https://www.mdpi.com/1996-1073/13/21/5835 |
| work_keys_str_mv | AT hafizalimuhammad numericalmodelingofejectoranddevelopmentofimprovedmethodsforthedesignofejectorassistedrefrigerationsystem AT hafizmuhammadabdullah numericalmodelingofejectoranddevelopmentofimprovedmethodsforthedesignofejectorassistedrefrigerationsystem AT zabdurrehman numericalmodelingofejectoranddevelopmentofimprovedmethodsforthedesignofejectorassistedrefrigerationsystem AT beomjoonlee numericalmodelingofejectoranddevelopmentofimprovedmethodsforthedesignofejectorassistedrefrigerationsystem AT youngjinbaik numericalmodelingofejectoranddevelopmentofimprovedmethodsforthedesignofejectorassistedrefrigerationsystem AT jongjaecho numericalmodelingofejectoranddevelopmentofimprovedmethodsforthedesignofejectorassistedrefrigerationsystem AT muhammadimran numericalmodelingofejectoranddevelopmentofimprovedmethodsforthedesignofejectorassistedrefrigerationsystem AT manzarmasud numericalmodelingofejectoranddevelopmentofimprovedmethodsforthedesignofejectorassistedrefrigerationsystem AT mohsinsaleem numericalmodelingofejectoranddevelopmentofimprovedmethodsforthedesignofejectorassistedrefrigerationsystem AT muhammadshoaibbutt numericalmodelingofejectoranddevelopmentofimprovedmethodsforthedesignofejectorassistedrefrigerationsystem |