Non-iterative condensation modeling for steam condensation with non-condensable gas in a vertical tube

Convective condensation of vapor in the presence of a non-condensable gas of high concentration in laminar flow in a vertical pipe

“…(19) and (28), the temperature at gas-to-liquid interface, T i , is given by the following equation:…”

“…Traces of non-condensable gases may enter into the condenser either as gases dissolved in the boiler feed water or due to leakage in the condenser. The effect of the presence of these gases on the process of condensation of vapor inside vertical tubes and channels was studied in literature [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23]. It is found that the existence of low percentage of non-condensable gas in vapors greatly reduces the heat transfer and the condensation rates.…”

“…They found that at high Reynolds numbers the heat transfer coefficients strongly depend on the interfacial shear stresses. Studies on the condensation of vapor in the presence of non-condensable gas in vertical tube are also available in literature [16][17][18][19][20][21][22][23]. Dehbi and Guentay [16] included the effect of interfacial shear stress on condensation, and they used heat and mass transfer analogy to obtain condensation rates.…”

“…The model also included the effects of suction, flow development, film waviness, and droplet entrainment. No and Park [19] developed a theoretical non-iterative condensation model using heat and mass transfer analogy considering the effects of high mass transfer rates, entrance and interfacial waviness on condensation. Maheshwari et al [20] incorporated the effects of film waviness, suction, developing flow and property variation of the gas phase for the case of turbulent flow of vapor-gas mixture inside a vertical tube.…”

Review of vapor condensation heat and mass transfer in the presence of non-condensable gas

“…No and Park [112] proposed a non-iterative condensation model for steam condensation with NCG in a vertical tube based on the heat and mass transfer analogy. The model was based on the assumption that the mixture and the condensate film were in a saturated state, the radiation heat transfer is negligible.…”