Back pressure optimization of direct air-cooled condenser considering anti-freezing and low-load operation

摘要

Direct air-cooled condensers are widely applied in northwest China because of water-saving. In order to improve the economical operation of the direct air-cooled condenser, based on the mechanism model, this paper calculates the optimal back pressure considering anti-freezing and low-load operation with considering the switching state of the exhaust steam isolation valves, and ensuring the minimum exhaust steam. The influences of ambient temperature and load ratio on optimal back pressure and energy saving are studied, which provide guidance for cold-end optimization and economic operation of direct air cooled condensers.