定域剖面机器人可对海洋进行长期、定域、高频的剖面观测，是海洋精细化和透明化观测的重要手段，然而，传统的电池式供能技术制约了其长期运行。根据其运动特点，通过俘获和利用海洋温差能以实现能量自供给是解决其能量“瓶颈”的必然途径。本项目针对海洋能自驱定域剖面机器人的温差能俘获和转换机理和方法开展理论与实验研究，首先，通过原理分析和实验表征，探索适宜海洋温差能俘获的高体积变化率相变材料；其次，提出一体化封装结构，建立基于流固耦合传热单元的传热模型，开展相变传热机理研究，探索高稳定性的相变速率提升方法；然后，基于一体化封装结构，研究孔隙充盈和俘能倍增理论，提出温差能充分俘获结构；接着，根据俘获能量特点，开展最大效率跟踪的发电理论研究，建立高效发电控制方法；最后，在实验平台上，进行“快速相变-充分俘能-高效发电”的温差能俘获与转换试验验证，为定域剖面机器人的海洋能自供给应用研究提供关键理论和技术方法。

Persistent position profiler, that enables ocean observing in long term with high frequency at persistent position, is an important approach to refine and transparent the ocean. However, traditional battery powered technology limits its long term application. Ocean thermal energy that can be captured by utilizing its motion feature is the inevitable way to solve power issue. This project focuses on the theoretical and experimental research of the energy-capture mechanism and conversion technology for persistent position profiler self-driven by ocean energy. Firstly, Phase Change Material(PCM) with high volume change rate that potentially suitable for ocean thermal energy capture is selected via fundamental analysis and experimental tests; secondly, an integrated encapsuled structure for PCM is proposed and its heat transfer model based on fluid solid coupling theory is established, heat-transfer mechanism and stable approach enhancing thermal conductivity in phase changing are studied based on the PCM model; then, theories of pore filling and energy multiplication based on the integrated PCM structure are studied, followed which a new structure for fully energy capture is proposed; after that, theory of maximum efficiency tracking for electric harvesting is researched based on the characteristic of the captured energy, and a high efficiency power generation control method is established; finally, validation of fast phase changing, fully energy capturing and high efficiency power harvesting will be carried out on the experimental platform, providing key theory and technology for self-powered persistent position profiler.