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

Martin Ryhl Kærn, Brian Elmegaard, L.F.S. Larsen

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    Abstract

    Flow mal-distribution in fin-and tube evaporators for residential air-conditioning is investigated by numerical simulation. In particularly, the interlaced and the face split evaporator are compared in flow maldistribution conditions. The considered sources of mal-distribution are: Liquid/vapor distribution and airflow distribution. Furthermore, compensation of flow mal-distribution by control of individual channel superheat is studied for each type of evaporator. 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 UA-value and 1.6% to 2.4% in COP compared to the interlaced evaporator without compensation.
    Original languageEnglish
    Title of host publicationICR 2011
    Publication date2011
    Publication statusPublished - 2011
    Event23rd IIR International Congress of Refrigeration - Prague, Czech Republic
    Duration: 21 Aug 201126 Aug 2011
    Conference number: 23
    http://www.icr2011.org/

    Conference

    Conference23rd IIR International Congress of Refrigeration
    Number23
    Country/TerritoryCzech Republic
    CityPrague
    Period21/08/201126/08/2011
    Internet address

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