Effects of water vapor condensation on the convection heat transfer of wet flue gas in a vertical tube

Jia, Li; Peng, Xiaofeng; Yan, Yixin; Sun, J.D.; Li, X.P.

doi:10.1016/s0017-9310(01)00082-5

Cited by 41 publications

(14 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Apparently, if mass fraction of water vapor is higher than about 8% in the wet flue gas, condensation heat transfer dominates the transport process and the single-phase convection heat transfer was relatively less significant and even could be neglected. But for lower Re number, the situation would be different [8]. Compared with the results in reference [8], one might conclude that in transition region the condensation heat transfer is one order of magnitude larger than that of single-phase convection heat transfer when mass fraction of vapor exceeds 20%.…”

Section: Resultsmentioning

confidence: 73%

An experimental study on latent heat recovery of exhaust wet flue gas

Jia

Sun

et al. 2002

J. of Therm. Sci.

View full text Add to dashboard Cite

The experiment was conducted to investigate the heat transfer performance of wet flue gas in a vertical tube. The factors influencing the convective condensation of wet flue gas were experimentally investigated. The measured results indicate that the convective heat transfer of bulk flow and condensation heat transfer of vapor have significant contribution to the total heat transfer and the dominant transport mechanism is dependent upon the vapor fraction in mixture. keywords: latent heat, recovery, exhaust flue gas.

show abstract

Section: Resultsmentioning

confidence: 73%

An experimental study on latent heat recovery of exhaust wet flue gas

Jia

Sun

et al. 2002

J. of Therm. Sci.

View full text Add to dashboard Cite

show abstract

“…Both models referred to the well-known Colburn-Hougen model (Colburn and Hougen, 1934) and introduced various modifications to it. In other works, mathematical models of condensing heat exchangers used at combustion of fuel oil (Ball et al, 1984;Osakabe, 2000) or gas (Jia et al, 2001;Liang et al, 2007;Shi et al, 2011) were presented.…”

Section: Cpeczasopismapanpl; Degruytercom/view/j/cpementioning

confidence: 99%

Methods of Thermal Calculations for a Condensing Waste-Heat Exchanger

Rączka¹,

Wójs²

2014

Chemical and Process Engineering

View full text Add to dashboard Cite

The paper presents the algorithms for a flue gas/water waste-heat exchanger with and without condensation of water vapour contained in flue gas with experimental validation of theoretical results. The algorithms were used for calculations of the area of a heat exchanger using waste heat from a pulverised brown coal fired steam boiler operating in a power unit with a capacity of 900 MW e . In calculation of the condensing part, the calculation results obtained with two algorithms were compared (Colburn-Hobler and VDI algorithms). The VDI algorithm allowed to take into account the condensation of water vapour for flue gas temperatures above the temperature of the water dew point. Thanks to this, it was possible to calculate more accurately the required heat transfer area, which resulted in its reduction by 19 %. In addition, the influence of the mass transfer on the heat transfer area was taken into account, which contributed to a further reduction in the calculated size of the heat exchanger -in total by 28% as compared with the Colburn-Hobler algorithm. The presented VDI algorithm was used to design a 312 kW pilot-scale condensing heat exchanger installed in PGE Belchatow power plant. Obtained experimental results are in a good agreement with calculated values.

show abstract

“…The modified film model assumes that a normal "induced velocity" [6] of the whole mixture gas will appear due to mass transfer and condensation of water vapor at the interface. The temperature field and concentration field outside the tube change due to "induced velocity."…”

Section: Energy Transfer Of the Mixture Gasmentioning

confidence: 99%

Mechanism research of convective condensation heat transfer for a gas mixture flowing over a horizontal tube

Jia

Wei

2008

Heat Trans. Asian Res.

View full text Add to dashboard Cite

The modified film model combined with Nusselt's condensation theory are used for the study of convective condensation heat transfer on a horizontal tube with moist mixed horizontal gas flows at a given speed. A theoretical model considering gas boundary layer separation was set up. The liquid film flows and the heat transfer on the tube are presented. The effects of the flow direction on condensation heat transfer are discussed. The results predict that the condensate film is so thin that the liquid phase heat resistance can be ignored.

show abstract

Effects of water vapor condensation on the convection heat transfer of wet flue gas in a vertical tube

Cited by 41 publications

References 8 publications

An experimental study on latent heat recovery of exhaust wet flue gas

An experimental study on latent heat recovery of exhaust wet flue gas

Methods of Thermal Calculations for a Condensing Waste-Heat Exchanger

Mechanism research of convective condensation heat transfer for a gas mixture flowing over a horizontal tube

Contact Info

Product

Resources

About