Performance characteristics of an air-cooled steam condensor with a hybrid dephlegmator
CITATION: Heyns, J. A. & Kroger, D. G. 2012. Performance characteristics of an air-cooled steam condensor with a hybrid dephlegmator. R&D Journal, 28:31-36.
The original publication is available at https://www.saimeche.org.za/page/RDJournal
This study evaluates the performance characteristics of a power plant incorporating a steam turbine and a direct air-cooled dry/wet condenser operating at different ambient temperatures. The proposed cooling system uses existing A-frame air-cooled condenser (ACC) technology and through the introduction of a hybrid (dry/wet) dephlegmator achieves measurable enhancement in cooling performance when ambient temperatures are high. During these periods the hybrid (dry/wet) condenser operating in a wet mode can achieve the same increased turbine performance as an oversized aircooled condenser or an air-cooled condenser with adiabatic cooling (spray cooling) of the inlet air at a considerably lower cost. For the same turbine power output the water consumed by an air-cooled condenser incorporating a hybrid (dry/wet) dephlegmator is at least 20 % less than an air-cooled condenser with adiabatic cooling of the inlet air.