Parameters of a cascade two-stage air-to-water heat pump at low ambient temperature

• Autorzy: Redko Andriy , Ujma Adam , Pavlovskyi Serhii , Redko Ihor , Gvozdetskii Oleksandr , Chaika Yurii , Borodai Dmytro

Identyfikatory

DOI

10.17512/bozpe.2023.12.15

• Języki publikacji: EN

Abstrakty

EN

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 1K is shown to increase the thermodynamic efficiency of the installation.

Słowa kluczowe

EN

heat pump; low air temperature; refrigerant; thermodynamic parameters

PL

pompa ciepła; niska temperatura powietrza; czynnik chłodniczy; parametry termodynamiczne

• Wydawca: Wydawnictwo Politechniki Częstochowskiej
• Czasopismo: Budownictwo o Zoptymalizowanym Potencjale Energetycznym
• Rocznik: 2023
• Tom: Vol. 12
• Strony: 132--142
• Opis fizyczny: Bibliogr. 21.poz., rys.

Twórcy

autor

Redko Andriy

• O.M. Beketov National University of Urban Economy in Kharkiv, Ukraine

• https://orcid.org/0000-0003-2331-7273

autor

Ujma Adam

• Czestochowa University of Technology, Poland

• https://orcid.org/0000-0001-5331-6808

autor

Pavlovskyi Serhii

• O.M. Beketov National University of Urban Economy in Kharkiv, Ukraine

• https://orcid.org/0000-0002-9891-2133

autor

Redko Ihor

• Ukrainian State University of Railway Transport, Ukraine

• https://orcid.org/0000-0002-9863-4487

autor

Gvozdetskii Oleksandr

• O.M. Beketov National University of Urban Economy in Kharkiv, Ukraine

• https://orcid.org/0000-0001-5590-4689

autor

Chaika Yurii

• O.M. Beketov National University of Urban Economy in Kharkiv, Ukraine

• https://orcid.org/0000-0003-1021-4662

autor

Borodai Dmytro

• Sumy National Agrarian University, Ukraine

• https://orcid.org/0000-0002-0771-9769

Bibliografia

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