Study of nonequilibrium regenerative heat exchange in positive displacement compressors
- Authors: Borisenko A.V.1, Zharov A.A.1, Valiakina A.V.1
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Affiliations:
- Bauman Moscow State Technical University
- Issue: Vol 113, No 1 (2024)
- Pages: 5-12
- Section: Original Study Articles
- URL: https://freezetech.ru/0023-124X/article/view/322769
- DOI: https://doi.org/10.17816/RF322769
- ID: 322769
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Abstract
BACKGROUND: An important task in the design of thermal engines is the evaluation of power losses in different processes to determine the installation efficiency. One of the processes that generates power losses in the compressor is the process of nonequilibrium regenerative heat exchange (NRHE) of the compressed gas with the working cavity walls. This heat exchange occurs at a significant temperature difference, which can lead to noticeable power losses. Modern compressor design methods do not consider losses from nonequilibrium regenerative heat exchange and do not describe them separately from other types of losses.
AIM: This study investigates the mechanism of losses during regenerative heat exchange between the gaseous working flow out and the working cavity walls and evaluates the scale of these losses.
METHODS AND RESULTS: This work provides a qualitative description of the mechanism for the formation of losses from NRHE. As a result of solving the problem of unsteady thermal conductivity, an analytical expression for calculating such losses is derived based on the Gouy-Stodola theorem.
CONCLUSIONS: The study revealed that power losses from NRHE account for a significant share in the overall balance of machine losses. Parameters influencing the magnitude of these losses were also determined, and recommendations were developed to reduce them.
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About the authors
Artem V. Borisenko
Bauman Moscow State Technical University
Author for correspondence.
Email: borart@bmstu.ru
ORCID iD: 0000-0002-4818-3702
SPIN-code: 2859-5006
Cand. Sci. (Tech.)
Russian Federation, MoscowAnton A. Zharov
Bauman Moscow State Technical University
Email: zharov_a@bmstu.ru
ORCID iD: 0000-0001-9945-0850
SPIN-code: 8581-1809
Cand. Sci. (Tech.)
Russian Federation, MoscowAnna V. Valiakina
Bauman Moscow State Technical University
Email: avaliakyna@rambler.ru
ORCID iD: 0000-0002-7709-1209
SPIN-code: 7679-2022
Cand. Sci. (Tech.)
Russian Federation, MoscowReferences
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