热交换器是再淹没传热试验主回路系统的重要设备之一,用于冷却主回路流体温度,以满足试验系统对主循环泵和预热器入口流体温度的要求。设计采用了U形换热管结构的蒸发式热交换器。为保证换热能力,设计对该热交换器在2 000 kW的最大换热功率下进行了传热计算,并针对再淹没试验实际工况分别对0.1 MPa和0.5 MPa的管程压力进行了传热校核,计算结果列于表1、2。结果表明,该热交换器在较小的壳程流量下就能将管程水冷却至50℃以下,其换热能力能够满足再 The heat exchanger is one of the important equipment for submerging the main circuit of the heat transfer test, and is used to cool the temperature of the main circuit fluid to meet the requirements of the test system for the temperature of the main circulating pump and the inlet of the preheater. Design U-shaped heat exchanger tube structure of the evaporative heat exchanger. In order to ensure the heat exchange capacity, the heat transfer was designed to calculate the heat transfer under the maximum heat transfer power of 2 000 kW, and the pipe pressure of 0.1 MPa and 0.5 MPa for the re-submergence test Heat check, calculation results are shown in Table 1 and 2. The results show that the heat exchanger in the smaller shell side flow rate will be able to pipe water cooling to below 50 ℃, the heat transfer capacity to meet the