CAJ | 학술논문

盐差能是存在于海水和淡水之间或者两种含盐浓度不同的海水之间的化学位差能，是以化学能形态存在的海洋能。反电渗析法是一种利用盐差能发电的方法，相比于其他方法，具有更高的能量密度。但是，目前对反电渗析法盐差电池的研究均限于小尺寸膜堆，放大实验发现功率密度显著降低，对过程的能量效率更少有分析。因此，对反电渗析法海洋盐差能利用过程进行数学模拟，对膜堆进行结构优化，研究在不同的结构参数下反电渗析盐差电池的功率密度和能量效率。结果表明，减小隔板厚度可以很大程度地提高反电渗析过程的功率密度和能量效率，增加RED装置的长度会获得较高的能量效率，但是平均功率密度有所降低。
염차능시존재우해수화담수지간혹자량충함염농도불동적해수지간적화학위차능，시이화학능형태존재적해양능。반전삼석법시일충이용염차능발전적방법，상비우기타방법，구유경고적능량밀도。단시，목전대반전삼석법염차전지적연구균한우소척촌막퇴，방대실험발현공솔밀도현저강저，대과정적능량효솔경소유분석。인차，대반전삼석법해양염차능이용과정진행수학모의，대막퇴진행결구우화，연구재불동적결구삼수하반전삼석염차전지적공솔밀도화능량효솔。결과표명，감소격판후도가이흔대정도지제고반전삼석과정적공솔밀도화능량효솔，증가RED장치적장도회획득교고적능량효솔，단시평균공솔밀도유소강저。
Salinity gradient power is a kind of chemical potential energy which exists between sea water and fresh water or water with different salt concentrations. Reverse electrodialysis (RED) is a process that transfers the salinity gradient to energy. Compared with other process, RED shows higher energy density. However, the studies on RED are limited to small membrane stacks. Experiments with a larger setup show that power density decreases significantly. Moreover, there is little research on the energy efficiency analysis of the RED process. In this paper, the energy transfer process of RED was simulated mathematically and the structure of the membrane stack was optimized. The power density and energy efficiency of RED at different structural parameters were also analyzed. Decreasing the thickness of the compartment could enhance both power density and energy efficiency greatly. Increasing flow length could result in higher energy efficiency, but average power density would decrease.