9月15日科威特大学石油与机械工程学院奥哈奇教授(Prof. OsamahAl-hawaj)应课题组之邀做了以海水淡化及新型能量回收装备设计为主题的学术报告。报告由邓建强老师主持，报告内容以故事的形式展开，介绍了近年来水危机的大背景情况下海水淡化利用技术的发展，压力能回收装置的迅速发展。着重介绍了SWRO技术近年来的发展和最近的应用情况。在场的学院老师及研究生就各自关心的问题积极提问，讲座气氛热烈。

    Many countries suffer from scarcity of potable water due to the lack of surfaceand underground water sources. To meet their needs, those countries resorted todesalination of seawater as the major source of potable water. Among the differenttechnologies of desalination, sea water reverse osmosis SWRO proved to be one ofthe most efficient means of desalination. The reduction of energy consumption inSWRO plants is the driving force behind the development of energy recovery devicesERD technology.This presentation reviews the state of the art of hydraulic ERD including turbineand pressure exchanger. In spite of the significant improvement in efficiency, ERDcan still be benefit from new technology that achieve comparable efficiency whileimproving in cost of manufacturing, compactness, simplicity, and flexibility ofoperation. For this purpose two concepts of ERD are introduced and discussed, thesliding ball rotary work exchanger, SBWE, and the sliding vane work exchanger,SVWE. Two versions of SVWE, namely dual vane and quad vane types are presented and discussed including some results of simplified theoretical modeling.