What is a surface capacitor?

surface capacitor is a type of heat exchanger, which is often used to condensing steam under the pressure of the vacuum pressure as part of the thermal power plant. The tube and shell capacitor converts steam from its gaseous phase to liquid as part of the thermodynamic cycle, which includes a bad generator, pump and turbine. The steam is condensed on the outer surface of the tube through which the cooling water passes. Water can come from a closed loop or system open for an external source. The configuration of the surface capacitor is determined by the number of passages, whether the system is divided and the shape of the shell. The steam pressure controls the turbine to produce energy. The system transmits the steam exhaust to the surface capacitor at lower pressure. The capacitor converts the steam back to the liquid. The pump moves the condensed water back to the steam generator so that the cycle can repeat.

The physical form of the capacitor is a shell with a tube bundleEC passing through it. The cooling water flows through the pipes. The heat is replaced when the cooling water absorbs heat from steam over the tube surface. The heat loss causes the steam to turn into liquid water known as condensate and falls to the bottom of the capacitor. Cooling water can be recycled in a closed loop or can be pumped from an outer source such as a lake or a river, and after passing through a capacitor.

Vacuum pressure is important for the system efficiency. The shell of the surface capacitor is maintained in the vacuum by keeping the temperature at a sufficiently low point, that the steam pressure is less than the ambient pressure. This reduced level helps to increase pressure drop through the turbine, thereby improving the output. Vacuum Pressure tends to draw non -confusable gases such as air, into a capacitor. These gases must be removed to prevent the efficiency caused by non -constructable gases surrounding the tubes and disrupting heat exchange. Removal is also necessary to prevent corrosion from presentOxygen in the system.

The unit design can ensure that the cooling water passes by tubes once, or it can have multiple pipe packages, so the water flows from the end to the end of the shell twice or more or more or a passage. The divided surface capacitor will have separate sections and pipe packages so that part of the unit can be closed for maintenance, while another part still works. The undivided unit with one bundle of shell and tube must be completely closed for any service or problems. Shells Condensser Shells can have rectangular or cylindrical shapes depending on the location of the device and the system capacity.