Analysis of the possibility of using R718 for a heat pump of a heating system based on a liquid-vapor ejector

Authors

DOI:

https://doi.org/10.15587/1729-4061.2020.217274

Keywords:

heat pump unit, heating system, liquid-vapor ejector, exergetic efficiency, thermoeconomic analysis

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 working process of such an apparatus is based on implementing 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 article describes the proposed installation and its differences from the traditional one, both in terms of circuit solutions and in terms of the operating cycle. A thermodynamic calculation was performed for the proposed installation with R718 as the working medium and the traditional heat pump systems operating on refrigerants R142b, R254fa, and R410a. As a result of the calculation, the parameters of all the devices included in these schemes were obtained, and the conversion factors of the cycles were determined. To assess the feasibility 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 effectiveness 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 values of exergetic efficiency of traditional and proposed schemes were obtained. The final stage of the study was the performance of a thermoeconomic analysis. The estimated 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

Author Biographies

Serhii Sharapov, Sumy State University Rymskoho-Korsakova str., 2, Sumy, Ukraine, 40007

PhD

Department of Technical Thermophysics

Danylo Husiev, Sumy State University Rymskoho-Korsakova str., 2, Sumy, Ukraine, 40007

Postgraduate Student

Department of Technical Thermophysics

Vitalii Panchenko, Sumy State University Rymskoho-Korsakova str., 2, Sumy, Ukraine, 40007

PhD

Department of Applied Hydroaeromechanics

Viktor Kozin, Sumy State University Rymskoho-Korsakova str., 2, Sumy, Ukraine, 40007

PhD

Department of Technical Thermophysics

Vadym Baha, Sumy State University Rymskoho-Korsakova str., 2, Sumy, Ukraine, 40007

PhD

Department of Technical Thermophysics

References

Dincer, I., Kanoglu, M. (2011). Refrigeration Systems and Applications. Wiley, 480. Available at: https://www.wiley.com/en-us/Refrigeration+Systems+and+Applications%2C+2nd+Edition-p-9781119956709

Huang, H. (Ed.) (2020). Heat Pumps for Cold Climate Heating. CRC Press, 378. doi: https://doi.org/10.1201/9781003029366

Kharazi, A. A., Muller, N. (2006). Comparing Water (R718) to Other Refrigerants. Process Industries, 85–93. doi: https://doi.org/10.1115/imece2006-13341

Nyvad, J., Elefsen, F. (1993). Energy Efficient Cooling by Use of Cycloid Water Vapour Compressor. IIR, Proceedings of Ghent Meeting, 67–74.

Sarevski, V. N., Sarevski, M. N. (2012). Characteristics Of R718 Thermocompression Refrigerating / Heat Pump Systems With Two-Phase Ejectors. International Refrigeration and Air Conditioning Conference. Available at: https://docs.lib.purdue.edu/iracc/1214/

Sharapov, S. O., Arsenyev, V. M., Kozin, V. M. (2017). Application of jet thermal compression for increasing the efficiency of vacuum systems. IOP Conference Series: Materials Science and Engineering, 233, 012028. doi: https://doi.org/10.1088/1757-899x/233/1/012028

Arseniev, V. M., Meleichuk, S. S. (2018). Teplovi nasosy: osnovy teoriyi i rozrakhunku. Sumy: Sumskyi derzhavnyi universytet, 364. Available at: http://essuir.sumdu.edu.ua/handle/123456789/70532

Tsatsaronis, Dzh. (2002). Vzaimodeystvie termodinamiki i ekonomiki dlya minimizatsii stoimosti energopreobrazuyushchey sistemy. Odessa: OOO «Studiya «Negotsiant», 152. Available at: http://catalog.odnb.odessa.ua/opac/index.php?url=/notices/index/IdNotice:21748/Source:default

Tsatsaronis, G. (2007). Application of Thermoeconomics to the Design and Synthesis of Energy Plants. Energy, Energy System Analysis, and Optimization. Available at: http://www.eolss.net/ebooks/Sample%20Chapters/C08/E3-19-02-07.pdf

Sharapov, S., Arsenyev, V., Protsenko, M. (2013). The use of liquid-vapor ejector in vacuum systems. Compressors Conferences. Smolenice. Available at: https://szchkt.org/compressors/Contents/2013/proceedings.pdf

Published

2020-12-31

How to Cite

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

Issue

Section

Energy-saving technologies and equipment