娄晶，郝岩

（北车（大连）柴油机有限公司，辽宁 大连 116022）

摘要：本文以某挖泥船16V240ZC型柴油机机外冷却水系统的改造项目为基础，阐述几种常见的船用冷却水系统流程；描述采用板式换热器的冷却系统基本流程、温度节点计算流程以及关键设备的选型计算方法。

关键词：船用柴油机；板式换热器；海水泵；传热计算；系统阻力计算

Abstract: Basing on the reconstruction of the exterior engine cooling water system for the 16V240ZC diesel engine that outputs power for a dredger, the paper discusses the working flow of several common cooling water systems applied in marine engines, describes the basic process of the cooling system working for the plate heat exchangers and the calculation process of temperature points as well as the selection mode of key equipments.

Key Words: Marine Diesel Engine; Plate Heat Exchanger; Sea Water Pump; Heat-transfer Calculation; System Resistance Calculation