Maximisation des performances grâce à l'ajustement du glissement de température dans les échangeurs d'énergie des systèmes de refroidissement fonctionnant avec des frigorigènes naturels â base d'hydrocarbures /CO2

Sai C. Yelishala; Kumaran Kannaiyan; Reza Sadr; Ziyu Wang; Yiannis A. Levendis; Hameed Metghalchi

doi:10.1016/j.ijrefrig.2020.08.006

Maximisation des performances grâce à l'ajustement du glissement de température dans les échangeurs d'énergie des systèmes de refroidissement fonctionnant avec des frigorigènes naturels â base d'hydrocarbures /CO₂

Translated title of the contribution: Performance maximization by temperature glide matching in energy exchangers of cooling systems operating with natural hydrocarbon/CO₂ refrigerants

Sai C. Yelishala^*, Kumaran Kannaiyan, Reza Sadr, Ziyu Wang, Yiannis A. Levendis, Hameed Metghalchi

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

This research is part of an effort in finding viable alternative refrigerants to mitigate anthropogenic climate change. In this study binary zeotropic mixtures of selected hydrocarbons (HCs) with carbon dioxide (CO₂) are evaluated as alternative refrigerants for a vapor-compression refrigeration cycle. A thermodynamic analysis of these mixtures is performed for a cycle with a variable temperature of energy transfer fluid in both evaporator and condenser/gas cooler. A temperature glide matching method with a specified minimum temperature difference between refrigerant and energy transfer fluid in the energy exchangers was developed for performance maximization. This method does not require any experimental input or an educated guess for the temperature difference between refrigerant and energy transfer fluid and can simulate both sub-critical and trans-critical cycles. Performance metrics like the coefficient of performance (COP) and volumetric refrigeration capacity (VRC) are calculated and discussed for various mixture compositions (0 to 100% CO₂). Furthermore, non-dimensional exergy destructions in different components in the cycle are determined to estimate the effect of individual components on the total performance. An increase up to 40% in COP for zeotropic mixtures of HCs and CO₂ is observed when compared with pure HCs. The VRC is also shown to increase with increasing CO₂ concentrations in HC + CO₂ mixtures. Exergy analysis shows a decrease in non-dimensional exergy destruction in the energy exchangers due to temperature glide matching.

Translated title of the contribution	Performance maximization by temperature glide matching in energy exchangers of cooling systems operating with natural hydrocarbon/CO₂ refrigerants
Original language	French
Pages (from-to)	294-304
Number of pages	11
Journal	International Journal of Refrigeration
Volume	119
DOIs	https://doi.org/10.1016/j.ijrefrig.2020.08.006
State	Published - Nov 2020
Externally published	Yes

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Yelishala, S. C., Kannaiyan, K., Sadr, R., Wang, Z., Levendis, Y. A., & Metghalchi, H. (2020). Maximisation des performances grâce à l'ajustement du glissement de température dans les échangeurs d'énergie des systèmes de refroidissement fonctionnant avec des frigorigènes naturels â base d'hydrocarbures /CO₂. International Journal of Refrigeration, 119, 294-304. https://doi.org/10.1016/j.ijrefrig.2020.08.006

@article{570d5a497cf94c5089f34d89ce8e4d5e,

title = "Maximisation des performances gr{\^a}ce {\`a} l'ajustement du glissement de temp{\'e}rature dans les {\'e}changeurs d'{\'e}nergie des syst{\`e}mes de refroidissement fonctionnant avec des frigorig{\`e}nes naturels {\^a} base d'hydrocarbures /CO2",

abstract = "This research is part of an effort in finding viable alternative refrigerants to mitigate anthropogenic climate change. In this study binary zeotropic mixtures of selected hydrocarbons (HCs) with carbon dioxide (CO2) are evaluated as alternative refrigerants for a vapor-compression refrigeration cycle. A thermodynamic analysis of these mixtures is performed for a cycle with a variable temperature of energy transfer fluid in both evaporator and condenser/gas cooler. A temperature glide matching method with a specified minimum temperature difference between refrigerant and energy transfer fluid in the energy exchangers was developed for performance maximization. This method does not require any experimental input or an educated guess for the temperature difference between refrigerant and energy transfer fluid and can simulate both sub-critical and trans-critical cycles. Performance metrics like the coefficient of performance (COP) and volumetric refrigeration capacity (VRC) are calculated and discussed for various mixture compositions (0 to 100% CO2). Furthermore, non-dimensional exergy destructions in different components in the cycle are determined to estimate the effect of individual components on the total performance. An increase up to 40% in COP for zeotropic mixtures of HCs and CO2 is observed when compared with pure HCs. The VRC is also shown to increase with increasing CO2 concentrations in HC + CO2 mixtures. Exergy analysis shows a decrease in non-dimensional exergy destruction in the energy exchangers due to temperature glide matching.",

keywords = "Alternative refrigerants, CO utilization, Natural refrigerants, Zeotropic mixtures",

author = "Yelishala, {Sai C.} and Kumaran Kannaiyan and Reza Sadr and Ziyu Wang and Levendis, {Yiannis A.} and Hameed Metghalchi",

note = "Publisher Copyright: {\textcopyright} 2020 Elsevier Ltd and IIR",

year = "2020",

month = nov,

doi = "10.1016/j.ijrefrig.2020.08.006",

language = "法语",

volume = "119",

pages = "294--304",

journal = "International Journal of Refrigeration",

issn = "0140-7007",

publisher = "Elsevier Ltd.",

}

Yelishala, SC, Kannaiyan, K, Sadr, R, Wang, Z, Levendis, YA & Metghalchi, H 2020, 'Maximisation des performances grâce à l'ajustement du glissement de température dans les échangeurs d'énergie des systèmes de refroidissement fonctionnant avec des frigorigènes naturels â base d'hydrocarbures /CO₂', International Journal of Refrigeration, vol. 119, pp. 294-304. https://doi.org/10.1016/j.ijrefrig.2020.08.006

Maximisation des performances grâce à l'ajustement du glissement de température dans les échangeurs d'énergie des systèmes de refroidissement fonctionnant avec des frigorigènes naturels â base d'hydrocarbures /CO₂. / Yelishala, Sai C.; Kannaiyan, Kumaran; Sadr, Reza et al.

In: International Journal of Refrigeration, Vol. 119, 11.2020, p. 294-304.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Maximisation des performances grâce à l'ajustement du glissement de température dans les échangeurs d'énergie des systèmes de refroidissement fonctionnant avec des frigorigènes naturels â base d'hydrocarbures /CO2

AU - Yelishala, Sai C.

AU - Kannaiyan, Kumaran

AU - Sadr, Reza

AU - Wang, Ziyu

AU - Levendis, Yiannis A.

AU - Metghalchi, Hameed

PY - 2020/11

Y1 - 2020/11

N2 - This research is part of an effort in finding viable alternative refrigerants to mitigate anthropogenic climate change. In this study binary zeotropic mixtures of selected hydrocarbons (HCs) with carbon dioxide (CO2) are evaluated as alternative refrigerants for a vapor-compression refrigeration cycle. A thermodynamic analysis of these mixtures is performed for a cycle with a variable temperature of energy transfer fluid in both evaporator and condenser/gas cooler. A temperature glide matching method with a specified minimum temperature difference between refrigerant and energy transfer fluid in the energy exchangers was developed for performance maximization. This method does not require any experimental input or an educated guess for the temperature difference between refrigerant and energy transfer fluid and can simulate both sub-critical and trans-critical cycles. Performance metrics like the coefficient of performance (COP) and volumetric refrigeration capacity (VRC) are calculated and discussed for various mixture compositions (0 to 100% CO2). Furthermore, non-dimensional exergy destructions in different components in the cycle are determined to estimate the effect of individual components on the total performance. An increase up to 40% in COP for zeotropic mixtures of HCs and CO2 is observed when compared with pure HCs. The VRC is also shown to increase with increasing CO2 concentrations in HC + CO2 mixtures. Exergy analysis shows a decrease in non-dimensional exergy destruction in the energy exchangers due to temperature glide matching.

AB - This research is part of an effort in finding viable alternative refrigerants to mitigate anthropogenic climate change. In this study binary zeotropic mixtures of selected hydrocarbons (HCs) with carbon dioxide (CO2) are evaluated as alternative refrigerants for a vapor-compression refrigeration cycle. A thermodynamic analysis of these mixtures is performed for a cycle with a variable temperature of energy transfer fluid in both evaporator and condenser/gas cooler. A temperature glide matching method with a specified minimum temperature difference between refrigerant and energy transfer fluid in the energy exchangers was developed for performance maximization. This method does not require any experimental input or an educated guess for the temperature difference between refrigerant and energy transfer fluid and can simulate both sub-critical and trans-critical cycles. Performance metrics like the coefficient of performance (COP) and volumetric refrigeration capacity (VRC) are calculated and discussed for various mixture compositions (0 to 100% CO2). Furthermore, non-dimensional exergy destructions in different components in the cycle are determined to estimate the effect of individual components on the total performance. An increase up to 40% in COP for zeotropic mixtures of HCs and CO2 is observed when compared with pure HCs. The VRC is also shown to increase with increasing CO2 concentrations in HC + CO2 mixtures. Exergy analysis shows a decrease in non-dimensional exergy destruction in the energy exchangers due to temperature glide matching.

KW - Alternative refrigerants

KW - CO utilization

KW - Natural refrigerants

KW - Zeotropic mixtures

UR - http://www.scopus.com/inward/record.url?scp=85090856453&partnerID=8YFLogxK

U2 - 10.1016/j.ijrefrig.2020.08.006

DO - 10.1016/j.ijrefrig.2020.08.006

M3 - 文章

AN - SCOPUS:85090856453

SN - 0140-7007

VL - 119

SP - 294

EP - 304

JO - International Journal of Refrigeration

JF - International Journal of Refrigeration

ER -

Yelishala SC, Kannaiyan K, Sadr R, Wang Z, Levendis YA, Metghalchi H. Maximisation des performances grâce à l'ajustement du glissement de température dans les échangeurs d'énergie des systèmes de refroidissement fonctionnant avec des frigorigènes naturels â base d'hydrocarbures /CO₂. International Journal of Refrigeration. 2020 Nov;119:294-304. doi: 10.1016/j.ijrefrig.2020.08.006

Maximisation des performances grâce à l'ajustement du glissement de température dans les échangeurs d'énergie des systèmes de refroidissement fonctionnant avec des frigorigènes naturels â base d'hydrocarbures /CO₂

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