Thermodynamic modeling, CFD analysis and parametric study of a near-isothermal reciprocating compressor
(2020) In Thermal Science and Engineering Progress 19.- Abstract
Reciprocating compressors hold great promise for enhanced efficiency across a wide variety of microscale and macroscale systems. This article investigates the potential of isothermal compression strategies by introducing two modeling approaches for the time-dependent analysis of reciprocating compressors. First, a thermodynamic model is developed based on conservation of mass and energy for a crank-shaft mechanism (0-Dimensional model). The resulting system of differential equations are solved via MATLAB software. 0D model is suited for efficient system dynamic, control, and parametric studies. The second modeling approach is a 2D computational fluid dynamics method implemented in COMSOL Multiphysics and allows for spatiotemporal... (More)
Reciprocating compressors hold great promise for enhanced efficiency across a wide variety of microscale and macroscale systems. This article investigates the potential of isothermal compression strategies by introducing two modeling approaches for the time-dependent analysis of reciprocating compressors. First, a thermodynamic model is developed based on conservation of mass and energy for a crank-shaft mechanism (0-Dimensional model). The resulting system of differential equations are solved via MATLAB software. 0D model is suited for efficient system dynamic, control, and parametric studies. The second modeling approach is a 2D computational fluid dynamics method implemented in COMSOL Multiphysics and allows for spatiotemporal characterization of the thermodynamic parameters (namely pressure, temperature and velocity vector field). The key to the successful implementation of 2D model is applying the moving mesh to the compression chamber. Simulation is carried out for low (0.5 Hz) and high (5 Hz) frequency operation conditions which are representative of laminar and turbulent regimes, respectively. The comparison of results between 0D and 2D models shows a very good match for both speeds. It is shown that lower operational speed will result in greater heat transfer from gas, demonstrating a near-isothermal situation. Finally, we evaluate the effect of design and operation parameters on the performance of air compressor using a parametric study. As one of the most important findings, an optimum design point for the stroke to diameter ratio of the cylinder is found. The approach presented here can lead to a common language for facilitating effective communication between thermal and system engineers.
(Less)
- author
- Mohammadi-Amin, Meysam ; Jahangiri, Ali Reza and Bustanchy, Mohsen
- publishing date
- 2020
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Computational Fluid Dynamics (CFD), Energy Storage, Isothermal Compression, Reciprocating Compressor, Thermodynamic Modeling
- in
- Thermal Science and Engineering Progress
- volume
- 19
- article number
- 100624
- publisher
- Elsevier
- external identifiers
-
- scopus:85088641993
- ISSN
- 2451-9049
- DOI
- 10.1016/j.tsep.2020.100624
- language
- English
- LU publication?
- no
- id
- 5c6590ad-737c-4300-80a2-2bffc87e7899
- date added to LUP
- 2021-01-08 12:05:38
- date last changed
- 2022-04-26 23:13:50
@article{5c6590ad-737c-4300-80a2-2bffc87e7899,
abstract = {{<p>Reciprocating compressors hold great promise for enhanced efficiency across a wide variety of microscale and macroscale systems. This article investigates the potential of isothermal compression strategies by introducing two modeling approaches for the time-dependent analysis of reciprocating compressors. First, a thermodynamic model is developed based on conservation of mass and energy for a crank-shaft mechanism (0-Dimensional model). The resulting system of differential equations are solved via MATLAB software. 0D model is suited for efficient system dynamic, control, and parametric studies. The second modeling approach is a 2D computational fluid dynamics method implemented in COMSOL Multiphysics and allows for spatiotemporal characterization of the thermodynamic parameters (namely pressure, temperature and velocity vector field). The key to the successful implementation of 2D model is applying the moving mesh to the compression chamber. Simulation is carried out for low (0.5 Hz) and high (5 Hz) frequency operation conditions which are representative of laminar and turbulent regimes, respectively. The comparison of results between 0D and 2D models shows a very good match for both speeds. It is shown that lower operational speed will result in greater heat transfer from gas, demonstrating a near-isothermal situation. Finally, we evaluate the effect of design and operation parameters on the performance of air compressor using a parametric study. As one of the most important findings, an optimum design point for the stroke to diameter ratio of the cylinder is found. The approach presented here can lead to a common language for facilitating effective communication between thermal and system engineers.</p>}},
author = {{Mohammadi-Amin, Meysam and Jahangiri, Ali Reza and Bustanchy, Mohsen}},
issn = {{2451-9049}},
keywords = {{Computational Fluid Dynamics (CFD); Energy Storage; Isothermal Compression; Reciprocating Compressor; Thermodynamic Modeling}},
language = {{eng}},
publisher = {{Elsevier}},
series = {{Thermal Science and Engineering Progress}},
title = {{Thermodynamic modeling, CFD analysis and parametric study of a near-isothermal reciprocating compressor}},
url = {{http://dx.doi.org/10.1016/j.tsep.2020.100624}},
doi = {{10.1016/j.tsep.2020.100624}},
volume = {{19}},
year = {{2020}},
}