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Title Analysis of the possibility of using R718 for a heat pump of a heating system based on a liquid-vapor ejector
Authors Sharapov, Serhii Olehovych  
Гусєв, Данило Максимович
Husiev, Danylo Maksymovych  
Husiev, Danylo Maksymovych
Panchenko, Vitalii Oleksandrovych  
Kozin, Viktor Mykolaiovych  
Baha, Vadym Mykolaiovych
ORCID http://orcid.org/0000-0002-8433-8580
http://orcid.org/0000-0003-4505-9084
http://orcid.org/0000-0001-9228-4888
http://orcid.org/0000-0001-9821-7774
Keywords heat pump unit
heating system
liquid-vapor ejector
exergetic efficiency
thermoeconomic analysis
теплонасосний агрегат
система опалення
ежектор рідинної пари
ексергетична ефективність
термоекономічний аналіз
Type Article
Date of Issue 2020
URI https://essuir.sumdu.edu.ua/handle/123456789/83131
Publisher Technology Center
License Creative Commons Attribution 4.0 International License
Citation Sharapov, S., Husiev, D., Panchenko, V., Kozin, V., & Baha, V. (2020). Analysis of the possibility of using R718 for a heat pump of a heating system based on a liquid-vapor ejector. Eastern-European Journal of Enterprise Technologies, 6(8 (108), 39–44. https://doi.org/10.15587/1729-4061.2020.217274
Abstract The study explores the possibility of using water (R718) as a refrigerant for a heat pump installation of a heating system. This unit is a vapor compression heat pump with a regenerative heat exchanger in which the vacuum unit based on a liquid-vapor ejector is used instead of a scroll refrigeration compressor. The work-ing process of such an apparatus is based on implement-ing a fundamentally new cycle that does not require the supply of working steam from the outside. Instead, steam is generated inside the vacuum unit. The arti-cle describes the proposed installation and its differ-ences from the traditional one, both in terms of circuit solutions and in terms of the operating cycle. A ther-modynamic calculation was performed for the proposed installation with R718 as the working medium and the traditional heat pump systems operating on refriger-ants R142b, R254fa, and R410a. As a result of the cal-culation, the parameters of all the devices included in these schemes were obtained, and the conversion factors of the cycles were determined. To assess the feasibili-ty of using R718 as a working substance and replacing the scroll refrigeration compressor with a liquid-vapor ejector, an exergy analysis was performed. This made it possible to fairly accurately determine the effective-ness of each circuit, since it implemented the possibility of comparing systems using several types of energy (for example, electrical and thermal). As a result, the val-ues of exergetic efficiency of traditional and proposed schemes were obtained. The final stage of the study was the performance of a thermoeconomic analysis. The esti-mated cost was determined for a unit of heat quantity per ton of the product and per unit of the heated area obtained in a unit with the working substance R718 and traditional installations with the working substances R142b, R254fa, and R410a.
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