Comparison of fin-and-tube interlaced and face split evaporators with flow maldistribution and compensation

Martin Ryhl Kærn; Brian Elmegaard; Lars Finn Sloth Larsen

doi:10.1016/j.ijrefrig.2012.10.006

Comparison of fin-and-tube interlaced and face split evaporators with flow maldistribution and compensation

Martin Ryhl Kærn, Brian Elmegaard, Lars Finn Sloth Larsen

Danfoss AS

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Abstract

Flow maldistribution in fin-and tube evaporators for residential air-conditioning is investigated by numerical simulation. In particular, the interlaced and the face split evaporator are compared in flow maldistribution conditions. The considered sources of maldistribution are the liquid/vapor distribution and the airflow distribution. Furthermore, compensation of flow maldistribution by control of individual channel superheat is studied for each evaporator type. It is shown that the interlaced evaporator is better at flow maldistribution than the face split evaporator. However, if individual channel superheats are controlled, the face split evaporator achieves the best performance, i.e. an increase of 7% in overall UA-value and 1.6–2.4% in COP compared to the interlaced evaporator without compensation.

Original language	English
Journal	International Journal of Refrigeration
Volume	36
Issue number	1
Pages (from-to)	203-214
ISSN	0140-7007
DOIs	https://doi.org/10.1016/j.ijrefrig.2012.10.006
Publication status	Published - 2013

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Post-print: Creative Commons Attribution-Non-Commercial-No Derivatives

Keywords

Distribution de l'écoulement
Compensation
Conditionnement d'air
Tube aileté
Modélisation
Simulation

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title = "Comparison of fin-and-tube interlaced and face split evaporators with flow maldistribution and compensation",

abstract = "Flow maldistribution in fin-and tube evaporators for residential air-conditioning is investigated by numerical simulation. In particular, the interlaced and the face split evaporator are compared in flow maldistribution conditions. The considered sources of maldistribution are the liquid/vapor distribution and the airflow distribution. Furthermore, compensation of flow maldistribution by control of individual channel superheat is studied for each evaporator type. It is shown that the interlaced evaporator is better at flow maldistribution than the face split evaporator. However, if individual channel superheats are controlled, the face split evaporator achieves the best performance, i.e. an increase of 7% in overall UA-value and 1.6–2.4% in COP compared to the interlaced evaporator without compensation.",

keywords = "Distribution de l'{\'e}coulement, Compensation, Conditionnement d'air, Tube ailet{\'e}, Mod{\'e}lisation, Simulation",

author = "K{\ae}rn, {Martin Ryhl} and Brian Elmegaard and Larsen, {Lars Finn Sloth}",

note = "Post-print: Creative Commons Attribution-Non-Commercial-No Derivatives",

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doi = "10.1016/j.ijrefrig.2012.10.006",

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TY - JOUR

T1 - Comparison of fin-and-tube interlaced and face split evaporators with flow maldistribution and compensation

AU - Kærn, Martin Ryhl

AU - Elmegaard, Brian

AU - Larsen, Lars Finn Sloth

N1 - Post-print: Creative Commons Attribution-Non-Commercial-No Derivatives

PY - 2013

Y1 - 2013

N2 - Flow maldistribution in fin-and tube evaporators for residential air-conditioning is investigated by numerical simulation. In particular, the interlaced and the face split evaporator are compared in flow maldistribution conditions. The considered sources of maldistribution are the liquid/vapor distribution and the airflow distribution. Furthermore, compensation of flow maldistribution by control of individual channel superheat is studied for each evaporator type. It is shown that the interlaced evaporator is better at flow maldistribution than the face split evaporator. However, if individual channel superheats are controlled, the face split evaporator achieves the best performance, i.e. an increase of 7% in overall UA-value and 1.6–2.4% in COP compared to the interlaced evaporator without compensation.

AB - Flow maldistribution in fin-and tube evaporators for residential air-conditioning is investigated by numerical simulation. In particular, the interlaced and the face split evaporator are compared in flow maldistribution conditions. The considered sources of maldistribution are the liquid/vapor distribution and the airflow distribution. Furthermore, compensation of flow maldistribution by control of individual channel superheat is studied for each evaporator type. It is shown that the interlaced evaporator is better at flow maldistribution than the face split evaporator. However, if individual channel superheats are controlled, the face split evaporator achieves the best performance, i.e. an increase of 7% in overall UA-value and 1.6–2.4% in COP compared to the interlaced evaporator without compensation.

KW - Distribution de l'écoulement

KW - Compensation

KW - Conditionnement d'air

KW - Tube aileté

KW - Modélisation

KW - Simulation

U2 - 10.1016/j.ijrefrig.2012.10.006

DO - 10.1016/j.ijrefrig.2012.10.006

M3 - Journal article

SN - 0140-7007

VL - 36

SP - 203

EP - 214

JO - International Journal of Refrigeration

JF - International Journal of Refrigeration

IS - 1

ER -

Comparison of fin-and-tube interlaced and face split evaporators with flow maldistribution and compensation

Abstract

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Keywords

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