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Kaluga, Russia

Fedorov V.A.,NPVP Turbokon | Milman O.O.,NPVP Turbokon
Thermal Engineering (English translation of Teploenergetika) | Year: 2014

We present the results of investigations carried out during the development of steam turbine condensing systems comprising a condenser, an air removing device, and condensate and circulation systems. It is found that the tube bundle layout and the characteristics of devices for removing noncondensable gases have an essential effect on the heat transfer intensity and pressure in the condensers. The design of the heat-transfer surface of a condenser operating with constant velocity of steam during its condensation is described, and the procedure for calculating the area and configuration of such heat-transfer surface is outlined. Results from tests of such apparatuses are presented. It is shown that the heat-transfer coefficients in them are a factor of 1.5-3.0 higher than those in the existing condensers at a moderate velocity of cooling medium. A qualitative pattern of a change in the volume filled with noncondensable gases that occurs during a decrease of thermal load or drop of cooling medium temperature is shown taking as an example condensers with steam flowing inside the condenser tubes. © 2014 Pleiades Publishing, Inc.

Fedorov V.A.,NPVP Turbokon | Mil'man O.O.,NPVP Turbokon | Gribin V.G.,Moscow Power Engineering Institute | Anan'ev P.A.,NPVP Turbokon
Thermal Engineering (English translation of Teploenergetika) | Year: 2014

The results of experimental studies and a physical model of the three-dimensional flow of cooling air in the circulation line (CL) of a dummy air condenser (AC) incorporating a fan, heat-exchange modules, a shell, and other auxiliary components are analyzed. The local air velocity fields determined experimentally at the AC CL inlet and at the fan diffuser outlet are presented. The guidelines for determining the head-capacity characteristics of the airflow through the AC CL are proposed. © 2014, Pleiades Publishing, Inc.

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