Performance of Plate Finned Tube Heat Exchangers Under Dehumidifying Conditions

Wang, Chi-Chuan; Hsieh, Yi Chung; Lin, Yur Tsai

doi:10.1115/1.2824075

Cited by 152 publications

(64 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…pronounced as the Reynolds number is further decreased. The test results for plain fin geometry having Fp = 1.57 mm by Wang et al (1997b) also showed a similar trend. There are two possible explanations of this effect of fin spacing on the heat transfer performance.…”

Section: Resultssupporting

confidence: 78%

Airside performance of herringbone fin‐and‐tube heat exchangers in wet conditions

Wang

Chang

et al. 1999

Can J Chem Eng

Self Cite

View full text Add to dashboard Cite

The airside performance for herringbone fin-and-tube heat exchangers under dehumidifying conditions are reported in this study. A total of eighteen samples were tested and compared. The effects of the number of tube rows, fin pitch, tube size, and wave height were examined in this study. A unique characteristic of the herringbone fin pattern is that the friction factors are strongly related to the number of tube rows. The airside performance of the herringbone fin pattern is strongly related to condensate retention. Based on the present test results, heat transfer and friction correlations, in terms of the Colburn j and Fanning friction factors, were proposed to describe the airside performance of the herringbone fin geometry. The correlation of the Colburnj factor gives a mean deviation of 5.76%, while the Fanningffactor shows a mean deviation of 8.27%.On decrit dans cette etude la performance calorifique du cBte de I'air pour des echangeurs a ailettes en chevrons dans des conditions de deshumidification. Dix-huit echantillons au total ont ete testes et compares. On a examine dans cette etude les effets du nombre de rangees de tubes, de I'ecartement des ailettes, de la taille des tubes et de la hauteur des ondes. Une caracteristique unique du modele a ailettes en chevrons reside dans les facteurs de friction qui sont fortement relies au nombre de rangees de tubes. La performance calorifique du cBte de l'air du modele a ailettes en chevrons depend fortement de la retention de condensat. Les resultats de ces essais sont utilises dans de nouvelles correlations de transfert de chaleur et de friction utilisant les facteurs de friction j de Colburn et de Fanning, afin de decrire la performance calorifique du cBte de I'air de la geometrie a ailettes en chevrons. La correlation du facteur de Colburn j donne un ecart de 5,76% tandis que le facteur de Fanningfmontre un ecart moyen de 8,27%.Keywords: herringbone fin-and-tube heat exchanger, dehumidifying, extended surfaces.in-and-tube heat exchangers are essential components in air F conditioning and refrigeration systems. Often, the application involves the condensation of humid air on the heat transfer surfaces when the surface temperature is below the corresponding dew point temperatures. Thus, simultaneous heat and mass transfer occurs during the dehumidifying process. The presence of water condensate makes the heat/mass transfer process even more complicated since it may bridge the fin spacing and deteriorate the heat transfer performance.In practical operation condition, the dominant resistance of the fin-and-tube heat exchangers is on the airside. Therefore, configured f i n patterns were often employed to effectively improve the overall performance of the fin-and-tube heat exchangers. Among the configured fin patterns, the wavy fin surface, as shown in Figure 1, is one of the most popular surfaces, since it can lengthen the airflow inside the heat exchanger and cause better mixing of the airflow. However, despite its popularity, the published works related to the w...

show abstract

Section: Resultssupporting

confidence: 78%

Airside performance of herringbone fin‐and‐tube heat exchangers in wet conditions

Wang

Chang

et al. 1999

Can J Chem Eng

Self Cite

View full text Add to dashboard Cite

show abstract

“…The figure shows that effect of fin pitch on j and f factor is negligible. It has been reported by many investigators that the effect of fin pitch on j and f factor is not significant (Min et al, 2004;Rich, 1973;Wang et al, 1997) Torikoshi et al (1994 conducted unsteady three dimensional computation for one row samples having different fin pitch. With the increase of fin pitch, the flow downstream of the samples was further disturbed.…”

Section: Resultsmentioning

confidence: 99%

“…The effect of humidity on j and f factor has been investigated by a number of researchers (Ma et al, 2007;Wang and Chang, 1998;Wang et al, 1997Wang et al, , 2000b). General conclusion from the investigations is that both j and f factor are independent of relative humidity.…”

Section: Resultsmentioning

confidence: 99%

An experimental investigation on the airside performance of fin-and-tube heat exchangers having radial slit fins under wet condition

Kim

2016

JTST

View full text Add to dashboard Cite

Heat transfer and friction characteristics of the radial slit-finned heat exchangers under wet condition are experimentally investigated. Louver-finned heat exchangers are also tested for comparison purpose. The effect of fin pitch on j and f factor is negligible. Louver fin samples yield higher f factors than slit fin samples. For one row configuration, the average f factor ratio between slit fin sample and plain fin sample is 1.61, which decreases to 1.37 for two row configuration, and to 1.36 for three row configuration. As for the j factor, the ratios are approximately the same. The j factor increases as the number of tube row decreases. The f factor, however, is independent of the number of tube row. The j/f ratios of the slit fin are higher than those of louver fin. A new correlation is developed based on the present data.

show abstract

“…A detailed review of plate fin-and-tube refrigeration heat exchangers is beyond the scope of this paper, because some new material on circuit and frost modeling, as well as analysis results will be introduced. For a detailed review of operational details and data under different conditions, the reader is referred to (Seker et al, 2004a(Seker et al, , 2004b, (Wang et al, 1996) and (Wang et al, 1997).…”

Section: Methodsmentioning

confidence: 99%

“…(Rich, 1973) and (Rich, 1975) conducted a systematic study on air side heat transfer and pressure drop on several coils with variable fin spacing and tube rows. (Wang et al, 1996) and (Wang et al, 1997) investigated the effect of fin spacing, fin thickness, number of tube rows on heat transfer and pressure drop with commonly used tube diameters in HVAC coils, under dry and humid conditions respectively. (Chuah et al, 1998) investigated dehumidifying performance of plain fin-and-tube coils.…”

Section: Methodsmentioning

confidence: 99%

Numerical Modeling and Experimentation on Evaporator Coils for Refrigeration in Dry and Frosting Operational Conditions

Aidoun¹,

Ouzzane²,

Bendaoud³

2011

Two Phase Flow, Phase Change and Numerical Modeling

View full text Add to dashboard Cite

Performance of Plate Finned Tube Heat Exchangers Under Dehumidifying Conditions

Cited by 152 publications

References 12 publications

Airside performance of herringbone fin‐and‐tube heat exchangers in wet conditions

Airside performance of herringbone fin‐and‐tube heat exchangers in wet conditions

An experimental investigation on the airside performance of fin-and-tube heat exchangers having radial slit fins under wet condition

Numerical Modeling and Experimentation on Evaporator Coils for Refrigeration in Dry and Frosting Operational Conditions

Contact Info

Product

Resources

About