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Experimental Study on a Multi-Evaporator Refrigeration System Equipped with EEV-Based Ejector

This study presents an experimental rig of a multi-evaporator refrigeration system, in which the pressure difference between two evaporators can be maintained by using both the pressure-regulating valve (PRV) and electronic expansion valve (EEV)-based ejector. The proposed EEV-based ejector that is...

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Detalles Bibliográficos
Autores principales: Yan, Jia, Wang, Chen
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9497742/
https://www.ncbi.nlm.nih.gov/pubmed/36141188
http://dx.doi.org/10.3390/e24091302
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author Yan, Jia
Wang, Chen
author_facet Yan, Jia
Wang, Chen
author_sort Yan, Jia
collection PubMed
description This study presents an experimental rig of a multi-evaporator refrigeration system, in which the pressure difference between two evaporators can be maintained by using both the pressure-regulating valve (PRV) and electronic expansion valve (EEV)-based ejector. The proposed EEV-based ejector that is used to partially recover the throttling losses of the PRV consists of an EEV and the main body of an ejector. The established experimental system can work in both PRV-based mode and ejector-based mode by switching the valves. Via experimental means, the performances of both modes were evaluated by varying the cooling loads. Moreover, the effects of the spindle-blocking area percentage of the EEV-based ejector and the condensing temperature on the system performance were identified. The results showed that: (1) the system performance of the ejector-based mode was 3.6% higher than the PRV-based mode; (2) both entrainment ratio and coefficient of performance dropped along with the increase in ejector spindle-blocking area percentage; (3) compared to ejector spindle-blocking area percentage, the condensing temperature had a more evident influence on the system performance.
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spelling pubmed-94977422022-09-23 Experimental Study on a Multi-Evaporator Refrigeration System Equipped with EEV-Based Ejector Yan, Jia Wang, Chen Entropy (Basel) Article This study presents an experimental rig of a multi-evaporator refrigeration system, in which the pressure difference between two evaporators can be maintained by using both the pressure-regulating valve (PRV) and electronic expansion valve (EEV)-based ejector. The proposed EEV-based ejector that is used to partially recover the throttling losses of the PRV consists of an EEV and the main body of an ejector. The established experimental system can work in both PRV-based mode and ejector-based mode by switching the valves. Via experimental means, the performances of both modes were evaluated by varying the cooling loads. Moreover, the effects of the spindle-blocking area percentage of the EEV-based ejector and the condensing temperature on the system performance were identified. The results showed that: (1) the system performance of the ejector-based mode was 3.6% higher than the PRV-based mode; (2) both entrainment ratio and coefficient of performance dropped along with the increase in ejector spindle-blocking area percentage; (3) compared to ejector spindle-blocking area percentage, the condensing temperature had a more evident influence on the system performance. MDPI 2022-09-14 /pmc/articles/PMC9497742/ /pubmed/36141188 http://dx.doi.org/10.3390/e24091302 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Yan, Jia
Wang, Chen
Experimental Study on a Multi-Evaporator Refrigeration System Equipped with EEV-Based Ejector
title Experimental Study on a Multi-Evaporator Refrigeration System Equipped with EEV-Based Ejector
title_full Experimental Study on a Multi-Evaporator Refrigeration System Equipped with EEV-Based Ejector
title_fullStr Experimental Study on a Multi-Evaporator Refrigeration System Equipped with EEV-Based Ejector
title_full_unstemmed Experimental Study on a Multi-Evaporator Refrigeration System Equipped with EEV-Based Ejector
title_short Experimental Study on a Multi-Evaporator Refrigeration System Equipped with EEV-Based Ejector
title_sort experimental study on a multi-evaporator refrigeration system equipped with eev-based ejector
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9497742/
https://www.ncbi.nlm.nih.gov/pubmed/36141188
http://dx.doi.org/10.3390/e24091302
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