Parameters of a cascade two-stage air-to-water heat pump at low ambient temperature
The results of the numerical calculation of the thermodynamic parameters of a cascade (two-stage) air-to-water heat pump at low atmospheric air temperatures are presented. A Freon R407c is used in the first circuit and a R152a is used in the second circuit. Calculations are made for ambient temperat...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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The Publishing Office of Czestochowa University of Technology
2023-10-01
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| Series: | Budownictwo o Zoptymalizowanym Potencjale Energetycznym |
| Subjects: | |
| Online Access: | https://bozpe.pcz.pl/archives/2023/bozpe-2023-15 |
| _version_ | 1797383292868100096 |
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| author | Аndriy Redko Adam Ujma Serhii Pavlovskyi Ihor Redko Oleksandr Gvozdetskii Yurii Chaika Dmytro Borodai |
| author_facet | Аndriy Redko Adam Ujma Serhii Pavlovskyi Ihor Redko Oleksandr Gvozdetskii Yurii Chaika Dmytro Borodai |
| author_sort | Аndriy Redko |
| collection | DOAJ |
| description | The results of the numerical calculation of the thermodynamic parameters of a cascade (two-stage) air-to-water heat pump at low atmospheric air temperatures are presented. A Freon R407c is used in the first circuit and a R152a is used in the second circuit. Calculations are made for ambient temperatures from 7°С to –25°С. The effect of underrecovery temperatures in heat exchange equipment is shown. Cycles with R245fa, R142b, R114, R123, R290, R236fa, R600a refrigerants, a mixture of isobutane and isopentane have been investigated. The effect of the complexity of a two-stage scheme on the efficiency of the cycle has been evaluated. The use of more complex schemes (for example, with liquid injection) does not affect the thermodynamic perfection of the heat pump and may be appropriate only to ensure operational reliability. Reducing the underrecovery temperature to 1 K is shown to increase the thermodynamic efficiency of the installation. |
| first_indexed | 2024-03-08T21:18:51Z |
| format | Article |
| id | doaj.art-e60d1c7584104c3c82798dd3ba2e4a73 |
| institution | Directory Open Access Journal |
| issn | 2299-8535 2544-963X |
| language | English |
| last_indexed | 2024-03-08T21:18:51Z |
| publishDate | 2023-10-01 |
| publisher | The Publishing Office of Czestochowa University of Technology |
| record_format | Article |
| series | Budownictwo o Zoptymalizowanym Potencjale Energetycznym |
| spelling | doaj.art-e60d1c7584104c3c82798dd3ba2e4a732023-12-21T13:18:21ZengThe Publishing Office of Czestochowa University of TechnologyBudownictwo o Zoptymalizowanym Potencjale Energetycznym2299-85352544-963X2023-10-0112132142doi.org/10.17512/bozpe.2023.12.15Parameters of a cascade two-stage air-to-water heat pump at low ambient temperatureАndriy Redko0https://orcid.org/0000-0003-2331-7273Adam Ujma1https://orcid.org/0000-0001-5331-6808Serhii Pavlovskyi2https://orcid.org/0000-0002-9891-2133Ihor Redko3https://orcid.org/0000-0002-9863-4487Oleksandr Gvozdetskii4https://orcid.org/0000-0001-5590-4689Yurii Chaika5https://orcid.org/0000-0003-1021-4662Dmytro Borodai6https://orcid.org/0000-0002-0771-9769O.M. Beketov National University of Urban Economy in Kharkiv, Ukraine Czestochowa University of Technology, Poland O.M. Beketov National University of Urban Economy in Kharkiv, Ukraine Ukrainian State University of Railway Transport, Ukraine O.M. Beketov National University of Urban Economy in Kharkiv, Ukraine O.M. Beketov National University of Urban Economy in Kharkiv, Ukraine Sumy National Agrarian University, Ukraine The results of the numerical calculation of the thermodynamic parameters of a cascade (two-stage) air-to-water heat pump at low atmospheric air temperatures are presented. A Freon R407c is used in the first circuit and a R152a is used in the second circuit. Calculations are made for ambient temperatures from 7°С to –25°С. The effect of underrecovery temperatures in heat exchange equipment is shown. Cycles with R245fa, R142b, R114, R123, R290, R236fa, R600a refrigerants, a mixture of isobutane and isopentane have been investigated. The effect of the complexity of a two-stage scheme on the efficiency of the cycle has been evaluated. The use of more complex schemes (for example, with liquid injection) does not affect the thermodynamic perfection of the heat pump and may be appropriate only to ensure operational reliability. Reducing the underrecovery temperature to 1 K is shown to increase the thermodynamic efficiency of the installation.https://bozpe.pcz.pl/archives/2023/bozpe-2023-15heat pumplow air temperaturerefrigerantthermodynamic parameters |
| spellingShingle | Аndriy Redko Adam Ujma Serhii Pavlovskyi Ihor Redko Oleksandr Gvozdetskii Yurii Chaika Dmytro Borodai Parameters of a cascade two-stage air-to-water heat pump at low ambient temperature Budownictwo o Zoptymalizowanym Potencjale Energetycznym heat pump low air temperature refrigerant thermodynamic parameters |
| title | Parameters of a cascade two-stage air-to-water heat pump at low ambient temperature |
| title_full | Parameters of a cascade two-stage air-to-water heat pump at low ambient temperature |
| title_fullStr | Parameters of a cascade two-stage air-to-water heat pump at low ambient temperature |
| title_full_unstemmed | Parameters of a cascade two-stage air-to-water heat pump at low ambient temperature |
| title_short | Parameters of a cascade two-stage air-to-water heat pump at low ambient temperature |
| title_sort | parameters of a cascade two stage air to water heat pump at low ambient temperature |
| topic | heat pump low air temperature refrigerant thermodynamic parameters |
| url | https://bozpe.pcz.pl/archives/2023/bozpe-2023-15 |
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