THE EFFECT OF INTERNAL HEAT EXCHANGER IN A REVERSIBLE CO2 SYSTEM UNDER VARIOUS OPERATING CONDITIONS
Апстракт
The use of an internal heat exchanger (IHX) as a cycle improvement measure is very common with CO2 systems. However, a simple thermodynamic analysis is not able to fully indicate the advantages of IHX in a single-stage system. For this reason, in this paper, the effect of the internal heat exchanger on the reversible CO2 system, which can work in both air-conditioning and heating mode, was experimentally investigated. Experiments were performed under various conditions for both operating modes, with and without an internal heat exchanger. The results of the experiments showed that in the heating mode (heat pump) the coefficient of performance (COP) can be increased up to 10,5% by introducing the internal heat exchanger, while in the air-conditioning mode, the COP can be increased up to 13,8%. Also, it has been shown that this improvement provides safer system operation and less frost formation on the evaporator.
Кључне речи:
reversible system / CO2 / internal heat exchanger / COPИзвор:
Zbornik 53. Međunarodnog kongresa o KGH, 2022, 2023Издавач:
- Beograd: SMEITS
Финансирање / пројекти:
- Интелигентни системи управљања климатизације у циљу постизања енергетски ефикасних режима у сложеним условима експлоатације (RS-MESTD-Technological Development (TD or TR)-33047)
- ACRC, University of Illinois, Urbana, Illinois, USA
Колекције
Институција/група
Mašinski fakultetTY - CONF AU - Černicin, Vladimir AU - Zhang, Wenying PY - 2023 UR - https://machinery.mas.bg.ac.rs/handle/123456789/5734 AB - The use of an internal heat exchanger (IHX) as a cycle improvement measure is very common with CO2 systems. However, a simple thermodynamic analysis is not able to fully indicate the advantages of IHX in a single-stage system. For this reason, in this paper, the effect of the internal heat exchanger on the reversible CO2 system, which can work in both air-conditioning and heating mode, was experimentally investigated. Experiments were performed under various conditions for both operating modes, with and without an internal heat exchanger. The results of the experiments showed that in the heating mode (heat pump) the coefficient of performance (COP) can be increased up to 10,5% by introducing the internal heat exchanger, while in the air-conditioning mode, the COP can be increased up to 13,8%. Also, it has been shown that this improvement provides safer system operation and less frost formation on the evaporator. PB - Beograd: SMEITS C3 - Zbornik 53. Međunarodnog kongresa o KGH, 2022 T1 - THE EFFECT OF INTERNAL HEAT EXCHANGER IN A REVERSIBLE CO2 SYSTEM UNDER VARIOUS OPERATING CONDITIONS UR - https://hdl.handle.net/21.15107/rcub_machinery_5734 ER -
@conference{ author = "Černicin, Vladimir and Zhang, Wenying", year = "2023", abstract = "The use of an internal heat exchanger (IHX) as a cycle improvement measure is very common with CO2 systems. However, a simple thermodynamic analysis is not able to fully indicate the advantages of IHX in a single-stage system. For this reason, in this paper, the effect of the internal heat exchanger on the reversible CO2 system, which can work in both air-conditioning and heating mode, was experimentally investigated. Experiments were performed under various conditions for both operating modes, with and without an internal heat exchanger. The results of the experiments showed that in the heating mode (heat pump) the coefficient of performance (COP) can be increased up to 10,5% by introducing the internal heat exchanger, while in the air-conditioning mode, the COP can be increased up to 13,8%. Also, it has been shown that this improvement provides safer system operation and less frost formation on the evaporator.", publisher = "Beograd: SMEITS", journal = "Zbornik 53. Međunarodnog kongresa o KGH, 2022", title = "THE EFFECT OF INTERNAL HEAT EXCHANGER IN A REVERSIBLE CO2 SYSTEM UNDER VARIOUS OPERATING CONDITIONS", url = "https://hdl.handle.net/21.15107/rcub_machinery_5734" }
Černicin, V.,& Zhang, W.. (2023). THE EFFECT OF INTERNAL HEAT EXCHANGER IN A REVERSIBLE CO2 SYSTEM UNDER VARIOUS OPERATING CONDITIONS. in Zbornik 53. Međunarodnog kongresa o KGH, 2022 Beograd: SMEITS.. https://hdl.handle.net/21.15107/rcub_machinery_5734
Černicin V, Zhang W. THE EFFECT OF INTERNAL HEAT EXCHANGER IN A REVERSIBLE CO2 SYSTEM UNDER VARIOUS OPERATING CONDITIONS. in Zbornik 53. Međunarodnog kongresa o KGH, 2022. 2023;. https://hdl.handle.net/21.15107/rcub_machinery_5734 .
Černicin, Vladimir, Zhang, Wenying, "THE EFFECT OF INTERNAL HEAT EXCHANGER IN A REVERSIBLE CO2 SYSTEM UNDER VARIOUS OPERATING CONDITIONS" in Zbornik 53. Međunarodnog kongresa o KGH, 2022 (2023), https://hdl.handle.net/21.15107/rcub_machinery_5734 .