针对目前国内滨海核电厂凝汽器的配置情况，论述单、双背压凝汽器的热力特性，并对它们进行技经分析。对比结果表明，双背压凝汽器热力特性优良，但缺少应用经验；在冷却水温较低的滨海核电厂，宜采用单背压凝汽器；当冷却水温大于21 ℃后，可通过单、双背压凝汽器的技经比较来决定取舍；在进行技经比较时，需考虑采用双背压凝汽器的风险。

Aimed at the configuration of condensers in the nuclear power plant in the coastal area in China, in this paper the thermodynamic characteristics between single and double backpressure condensers are compared to make an analysisof their technical and economic characteristics. The results show that double backpressure condenser has better thermodynamic characteristics while lacks application experience. Single backpressure condenser is better to be used in the coastal nuclear power plant with low temperature cooling water. However, when the temperature of cooling water is higher than 21 ℃, single and double backpressure condensers should be choosed according to the results of their technical and economic analysis. In the technical and economic analysis process, the risk of using dual pressure condensers should be considered.