Surface condenser generates vacuum backpressure to ensure output of turbine, and also condenses a waste-steam while located at the end of steam turbine which is generally used in industries such as power generating in power plant, compressing in chemical plant as well as propelling of LNG tanker. The produced condensate is going to be re-circulated towards boiler passing through feed water pump, feed-water heater and deaerator.
Depends on location of surface condenser against turbine, it is classified into Top-entry type and Side-entry type. The circular type surface condenser is used for small size and medium size while square type surface condenser is used for large size such as power plant. The function of surface condenser is to maintain back pressure & the power of turbine for generator driver, compressor driver and propulsion of LNG carrier while exhausted steam from turbine is condensed. The condensed feed water in surface condenser is recirculated to boiler through feed water heater and deaerator.
http://www.dh.co.kr/surface-condenser/
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