熔盐与亚临界汽/水在管壳换热器中传热特性实验研究

EXPERIMENTAL INVESTIGATION ON HEAT TRANSFER CHARACTERISTIC OF MOLTEN SALT AND SUBCRITICAL STEAM/WATER IN TUBE-SHELL HEAT EXCHANGER

以太阳盐(Solar Salt)为工质,实验研究熔盐与过热蒸汽/亚临界水在管壳式换热器中的流动传热特性,并开展管侧及壳侧流量、入口温度、压强等参数对熔盐流动传热的敏感性研究。实验结果表明,熔盐入口温度对其传热规律影响较大。根据传热相似原理,获得熔盐与单相汽、水传热的修正关联式,其与实验值的最大偏差分别为±10%,-15%。

A binary mixture solar salt was used as a working fluid to experimentally study the heat transfer characteristics of molten salt and subcritical steam/water in a tube-shell heat exchanger.The sensitivity of flow,inlet temperature,pressure and other parameters on pipe side and shell side to the heat transfer of molten salt flow was studied.The experimental results show that the molten salt inlet temperature has a greater influence on the heat transfer law.Based on the experimental data and the multivariate linear fitting method,the heat transfer correlation between molten salt and subcritical water or steam across the tube bundle is proposed.The maximum fitting errors are±10%,-15%,respectively.