Air Cooled Conderser

What is air cooled condenser (ACC) and it’s advantages? Air Cooled Condenser (ACC) has main advantage that it does not need water to condense the process fluid and it take a major role for water conservation of environment. In this system, exhaust steam from the turbine flows through the tube bundles of an ACC and is condensed in parallel flow tube bundles using air flow induced by properly designed axial fans. the turbine exhaust enters a steam distribution manifold/header located on top of the ACC structure Working of air cooled condenser – Generally acc has a of ‘a” shaped structure. Heat of steam is exchanged through finned tubes. Steam discharged from. The steam is then distributed into the fin tube heat exchangers arranged in a “roof structure” with an A-shape configuration. The A-shape structure may be single row or multi row. Cooling fans are provided at the bottom of a-frame. Steam Flowing down inside the tubes From common duct and steam condenses due to the cooling effect of ambient air drawn over the external finned surface of the tubes by the fans. Condensate collected at the bottom header of a-frame and then drains to a condensate storage tank (CST). The condensate are then pumped from CST tank to boiler feed water circuit. Rupture disc are provided at the top header of a-frame to protect condenser from positive pressure. Partition walls provided between fan cells to isolate operating cells from non operating ones.

Acc operates under vacuum same like surface condenser. Air removing equipment/ejectors are provided to remove noncondensable gasses from condenser.Fin cleaning system are provided for cleaning of tube fins to avoid dust accumulation on tubes or for provision for proper heat transfer.

Image of acc

Equioments of ACC1. Air-cooled steam condenser tower. 2. Air-flow control equipment. 3. Wind and/or cell-partition walls. 4. Acc fans ,motor, gearbox. 5. Air removal equipment(Ejector). 6. Condensate storage tank. 7. Condensate pumps. 8. Steam ducts and expansion joints..

Advantage of accLower Pressure Drops Steam side/Airside Higher Thermal Efficiency Dead Zones Do Not Exist Lower Fan Power Consumption Lower Sound Power Level Lower Weight Per Face Area Higher Corrosion Resistance. Design of Air-cooled condenser depends onExhaust steam flowrate. Exhaust steam enthalpy. Design exhaust pressure. Design ambient-air temperature. Maximum ambient-air temperature. Minimum ambient-air temperature. Lowest optimum turbine-exhaust pressure.

Highest permissible turbine-exhaust pressure. Economic optimization of fan power usage.