Model development and simulation on dropwise condensation by coupling absorption theory in the presence of non-condensable gas (NCG)

Jiang, Junwei; Liu, Feng; Zhang, Xianfu; Wei, Hongyuan

doi:10.1016/j.icheatmasstransfer.2020.104936

Cited by 9 publications

(1 citation statement)

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“…The predicted values of the condensate water flowrate were close to the measured ones, with the greatest relative error of 5.5%. Considering the existence of NCG, Jiang et al [32] established a model for the convectivecondensation heat transfer calculation on the basis of the pure steam dropwise condensation. The simulation results indicated that the capacities of absorptive mass transfer and surface condensation determined the heat transfer performance coordinately.…”

Section: Introductionmentioning

confidence: 99%

A Thermal Calculation Model for Tubular Condensing Heat Exchanger

Han,

Yang,

Yang

et al. 2023

Preprint

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The condensing heat exchanger is commonly applied in various heat exchange systems. It can efficiently recover moisture and heat from the flue gas that contains water vapor. However, the convective-condensation heat transfer process is so complicated that no mature thermal calculation model is available. This study develops a thermal calculation model for the widely employed tubular condensing heat exchanger in industry. To characterize the degree of the heat and mass transfer, this study introduces two parameters, namely the sensible and latent heat transfer efficiencies of fin. The thermal calculations are conducted for the condensing heat exchangers reported in the literature to verify the proposed model by comparing it with the experimental data. The results show that the absolute error of the calculated sensible and latent heat transfer efficiencies is 0.0365 and 0.0268, respectively. Under the working conditions in this study, a maximum difference of 5.2 K has been acquired between the measured and calculated values of the outlet temperature. The relative error of the condensate water flowrate is mostly within ±5.0% and ±10.0% under the bare-tube and finned-tube conditions, respectively, with a maximum deviation of 0.7 and 1.4 kg h-1. This study provides a general model for designing and optimizing various tubular condensing heat exchangers accurately.

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Section: Introductionmentioning

confidence: 99%