High-efficiency condenser of steam from a steam–gas mixture

Мильман, О. О.; Krylov, Vladimir A.; Ptakhin, A. V.; Kondrat’ev, A. V.; Yan’kov, G. G.

doi:10.1134/s0040601517120072

Cited by 12 publications

(3 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Data processing according to equation (1) has a higher approximation error (up to 10%) compared to that proposed earlier in [2]: (2) where is heat-transfer coefficient during condensation of pure stationary steam, W/(m 2 K).…”

Section: Steam-turbine Gas-turbine and Combined-cycle Power Plants And Their Auxiliary Equipmentmentioning

confidence: 95%

“…On the basis of the previously obtained experimental data [2], a program was developed for calculating the modulus of the steam condenser contained in the SGM. Heat transfer from the SGM to the heatexchange tubes is described by the formula (1) where α is the heat-transfer coefficient of the SGM, W/(m 2 K); is the heat-transfer coefficient of pure immobile steam according to Ber-…”

Section: Program and Methods For Calculating The Condensermentioning

confidence: 99%

“…In [1][2][3][4], the results of experiments and calculations of heat-transfer coefficients during condensation of steam from a vapor-gas mixture on a horizontal pipe bundle with a volume concentration of noncondensable gases up to 15%, as well as the results of tests of a condenser module with an approximately constant vapor velocity, are presented. The works [5][6][7][8] provide information on the method of computer calculation of the process of condensation of water vapor using 2D-modeling.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Optimizing Parameters of a High-Efficiency Steam Condenser from a Steam-Gas Mixture with a Large Content of Noncondensing Gases

Мильман¹,

Kartuesova²,

Krylov³

et al. 2021

Therm. Eng.

Self Cite

View full text Add to dashboard Cite

A method and a program for calculating a steam condenser from a steam-gas mixture (SGM) while maintaining its velocity along the depth of the pipe bundle have been developed. At a constant velocity of the SGM, as the steam condenses, a high intensity of heat and mass transfer remains due to the dynamic effect of the flow, but there is a loss of pressure at the same time, as a result of which the saturation temperature of steam in the SGM decreases. The program was used to calculate the optimal steam velocity in a condenser with a high content of noncondensable gases. The optimization took into account the ratio between intensification heat and mass transfer with an increase in the SGM rate and decrease in temperature saturation steam in the mixture due to an increase in pressure loss. The target function was the minimum heat-transfer surface area for a given degree of vapor condensation in the tube bundle. Calculations have been carried out at a pressure of 5-30 kPa at the inlet to the tube bundle, the temperature of cooling water at the inlet to the condenser 12-30°C, water velocity in the pipes 1-4 m/s, length of pipes 4-12 m, and concentration of noncondensable gases (NCG) at the inlet 1-20% at an SGM flow rate of 1 kg/s. An assessment of the influence of deposits on the surface of pipes on the intensity of heat transfer during operation, as well as the influence of the accuracy of calculating the heat-transfer coefficient on the results of calculating the optimal speed, has been carried out. The dependences of the surface area of the heat-exchange surface on the velocity of the SGM and the dependence of the optimal velocity of the SGM on the temperature and speed of the cooling water, the condensation pressure, and other parameters have been obtained. The optimal value of the SGM velocity lies in the region of more than 40 m/s, which must be taken into account when designing capacitors.

show abstract

Section: Steam-turbine Gas-turbine and Combined-cycle Power Plants And Their Auxiliary Equipmentmentioning

confidence: 95%

Section: Program and Methods For Calculating The Condensermentioning

confidence: 99%