Offering leading edge heat-transfer equipment, Maarky Thermal Systems meets the needs of a global client base of power producers. In June 2016 Maarky Thermal Systems president Dr. Ranga Nadig presented at the ASME Power and Energy Conference in Charlotte, North Carolina, on the topic “Evacuation Systems for Steam Surface Condensers: Vacuum Pumps or Steam Jet Air Ejectors?”
In steam power plants, steam released from the turbine undergoes condensation within a vacuum environment that is cooled by either air or water. One common problem involves air leaking into the condenser through faulty seals, valves, and flanged connections. As this has a negative impact on condensing functions, non-condensable air that becomes trapped in the system must be continuously evacuated.
A key question plants face is whether to use motor-driven vacuum pumps or steam-driven jet air ejectors. This decision involves weighing factors such as costs, motive steam availability, and end user preferences. Some plants bridge these differences through multi-stage hybrid systems that are effective in operations requiring low suction pressure.