Experimental validation of model predictions on evaporator coils with an emphasis on fin efficiency

Liang, S. Y.; Wong, Teck Neng

doi:10.1016/j.ijthermalsci.2009.08.004

Cited by 13 publications

(4 citation statements)

References 13 publications

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“…Heat transfer coefficient [17] Total heat transfer [23,24] Lewis number [18] Pressure drop [25] Overall fin efficiency [19] Pressure drop [20] Air specific humidity [21] Friction factor [22] Table 1.…”

Section: Air Side Reference Refrigerant Side Referencementioning

confidence: 99%

Fin and Tube HVAC Evaporators Design by the Hybrid Method

Starace¹,

Macchitella²,

Colangelo³

2023

Cooling Technologies - Technologies and Systems to Guarantee Thermal Comfort in Efficient Buildings

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The hybrid method allows the overall performance of a fin and tube evaporator to be determined beginning from local analysis results and combining the accuracy of the data obtained with a small-scale numerical approach with the low processing costs of the analytical approaches. The program calculates heat transfer rates, pressure drops, and temperature fields for both sides of the heat exchanger using regression equations derived from known data (analytical, experimental, or numerical).The hybrid method has been progressively refined and enhanced with the goal of modeling heat exchangers more closely to actual typologies often used for HVAC application that involve intricate circuit arrangements. In order to aid designers to choose the optimal configuration, various refrigerant circuitry layout choices were examined as well as a proper trade-off analysis was performed.

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Section: Air Side Reference Refrigerant Side Referencementioning

confidence: 99%

Fin and Tube HVAC Evaporators Design by the Hybrid Method

Starace¹,

Macchitella²,

Colangelo³

2023

Cooling Technologies - Technologies and Systems to Guarantee Thermal Comfort in Efficient Buildings

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“…[24] Air specific humidity [25] The heat transfer rates of the edge cells are not obtained through the convergence routine, but they are calculated as 10% of the heat transfer rates of the neighbour cells, which are located below the edge cell in odd ranks and above in even ranks (Fig. 2 (a)).…”

Section: Refrigerant Sidementioning

confidence: 99%

The hybrid method for the plate-finned tube evaporator design process

Starace¹,

Macchitella

Colangelo

2021

E3S Web Conf.

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The plate-finned tube evaporator performance, in terms of heat transfer rate and refrigerant pressure drops, is influenced by several choices done during the design process to be carried out complying with different constraints. In this paper different refrigerant circuitry layout options together with other parameters variations were investigated with the purpose of supporting designers. Performance predictions were calculated using the hybrid method as well as appropriate Performance Evaluation Criteria (PEC) were adopted to select the best layout. The hybrid method has been here revised and improved aiming at modelling heat exchangers with an approach closer to real configurations that include complex circuit layouts. The method was chosen as its main advantage (high accuracy in the results with low computational costs) allowed to easily perform operating conditions modifications to be compared.

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“…Therefore, the airside heat and mass transfer characteristics of finned-tube heat exchangers have been extensively studied [1][2][3][4][5][6][7][8][9][10] to better optimize the structural parameters, including the fin materials, fin pitch, tube diameters and tube arrangements. There have been many experimental studies [8][9][10][11][12][13][14][15][16][17] of these factors for specific heat exchangers [7] to enhance the heat transfer [18,19] and improve the fin efficiency.…”

Section: Introductionmentioning

confidence: 99%

“…An equivalent convection heat transfer term for fully wet conditions was added to impact the heat transfer, owing to the condensation latent heat. There have been few analyses of the fin efficiency for fully wet conditions, though there have been many studies [22][23][24][25][26][27][28][29] turning to the fin efficiency values. Some design manuals [12] and many experimental studies [24] have used the Schmidt model for dry conditions and the McQuiston model [12,13] for fully wet conditions.…”

Section: Introductionmentioning

confidence: 99%

Airside fin efficiencies for finned-tube heat exchangers with forced convection

Cheng

Zhang

2011

Sci. China Technol. Sci.

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The heat transfer and mass transfer fin efficiencies were analyzed numerically to show that popular models for heat transfer fin efficiency for circular fins are not always reasonable. The numerical results show that the effective heat transfer area of a circular fin increases several times faster than that of a straight fin for the same tube radius. Then, a simple but accurate heat transfer fin efficiency model was developed and verified by numerical results for a wide range of fin designs. This model predicts the heat transfer fin efficiency with absolute errors of less than 1%. The heat transfer and mass transfer fin efficiencies were found to be quite different for typical air flow with low relative humidity. Thus, these two fin efficiencies should not be assumed to be equal and a mass transfer fin efficiency model was developed, based on the heat transfer fin efficiency model. These heat transfer and mass transfer fin efficiencies are very useful for more accurate prediction for a wide range of practical applications. circular fin efficiency, heat transfer, mass transfer, humid air condensation Citation:Li C, Li J M, Zhang H R. Airside fin efficiencies for finned-tube heat exchangers with forced convection.

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Experimental validation of model predictions on evaporator coils with an emphasis on fin efficiency

Cited by 13 publications

References 13 publications

Fin and Tube HVAC Evaporators Design by the Hybrid Method

Fin and Tube HVAC Evaporators Design by the Hybrid Method

The hybrid method for the plate-finned tube evaporator design process

Airside fin efficiencies for finned-tube heat exchangers with forced convection

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