Modelling refrigerant distribution in microchannel evaporators

Publication: Research - peer-reviewJournal article – Annual report year: 2009

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Modelling refrigerant distribution in microchannel evaporators. / Brix, Wiebke; Kærn, Martin Ryhl; Elmegaard, Brian.

In: International Journal of Refrigeration, Vol. 32, No. 7, 2009, p. 1736-1743.

Publication: Research - peer-reviewJournal article – Annual report year: 2009

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Author

Brix, Wiebke; Kærn, Martin Ryhl; Elmegaard, Brian / Modelling refrigerant distribution in microchannel evaporators.

In: International Journal of Refrigeration, Vol. 32, No. 7, 2009, p. 1736-1743.

Publication: Research - peer-reviewJournal article – Annual report year: 2009

Bibtex

@article{f7631ea677934507ba08d1adfb34bf66,
title = "Modelling refrigerant distribution in microchannel evaporators",
publisher = "Elsevier Ltd.",
author = "Wiebke Brix and Kærn, {Martin Ryhl} and Brian Elmegaard",
year = "2009",
doi = "10.1016/j.ijrefrig.2009.05.006",
volume = "32",
number = "7",
pages = "1736--1743",
journal = "International Journal of Refrigeration",
issn = "0140-7007",

}

RIS

TY - JOUR

T1 - Modelling refrigerant distribution in microchannel evaporators

A1 - Brix,Wiebke

A1 - Kærn,Martin Ryhl

A1 - Elmegaard,Brian

AU - Brix,Wiebke

AU - Kærn,Martin Ryhl

AU - Elmegaard,Brian

PB - Elsevier Ltd.

PY - 2009

Y1 - 2009

N2 - The effects of refrigerant maldistribution in parallel evaporator channels on the heat exchanger performance are investigated numerically. For this purpose a 1D steady state model of refrigerant R134a evaporating in a microchannel tube is built and validated against other evaporator models. A study of the refrigerant distribution is carried out for two channels in parallel and for two different cases. In the first case maldistribution of the inlet quality into the channels is considered, and in the second case a non-uniform airflow on the secondary side is considered. In both cases the total mixed superheat out of the evaporator is kept constant. It is shown that the cooling capacity of the evaporator is reduced significantly, both in the case of unevenly distributed inlet quality and for the case of non-uniform airflow on the outside of the channels.

AB - The effects of refrigerant maldistribution in parallel evaporator channels on the heat exchanger performance are investigated numerically. For this purpose a 1D steady state model of refrigerant R134a evaporating in a microchannel tube is built and validated against other evaporator models. A study of the refrigerant distribution is carried out for two channels in parallel and for two different cases. In the first case maldistribution of the inlet quality into the channels is considered, and in the second case a non-uniform airflow on the secondary side is considered. In both cases the total mixed superheat out of the evaporator is kept constant. It is shown that the cooling capacity of the evaporator is reduced significantly, both in the case of unevenly distributed inlet quality and for the case of non-uniform airflow on the outside of the channels.

U2 - 10.1016/j.ijrefrig.2009.05.006

DO - 10.1016/j.ijrefrig.2009.05.006

JO - International Journal of Refrigeration

JF - International Journal of Refrigeration

SN - 0140-7007

IS - 7

VL - 32

SP - 1736

EP - 1743

ER -